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DCM3717S60E13G5TN1 - 750W 40-60V to 12.2V DCM Module | Vicor
The Vicor DCM3717S60E13G5TN1 is a 750 W non-isolated, regulated DC-DC converter module that operates from a semi-regulated 40 V to 60 V input and produces a regulated point-of-load output of 12.2 V at up to 61.5 A continuous load current. Housed in the surface-mount SM-ChiP package, the module leverages Vicor's patented Zero-Voltage Switching (ZVS) buck-boost regulator stage followed by a Sine Amplitude Converter (SAC) post-regulator topology to deliver high-efficiency, high-density power conversion. A DCM (DC-DC Converter Module) is a complete, surface-mounted point-of-load conversion subsystem that integrates the magnetics, control loop, and power switches within a single thermally-conductive package, positioned in the power management IC hierarchy above discrete POL regulators and below front-end isolated bricks. These modules are typically used to translate a higher distribution bus (in this case, a 48 V nominal telecom/datacom rail) down to a lower intermediate rail, often a 12 V bus, that downstream VRMs further step down to processor-core voltages. Key electrical specifications include a 96.5% peak efficiency, 750 W continuous output power, 900 W peak power capability, and a wide 10.0 V to 12.5 V programmable output voltage range. Operating input spans 40 V to 60 V (semi-regulated 48 V rail), and the unit is rated for a chassis-mount baseplate temperature range of -40 °C to +125 °C. The SM-ChiP surface-mount package supports reflow soldering and provides a low-impedance thermal path to the PCB. Architecturally, the ZVS buck-boost stage produces a safety-grounded switching node, and the SAC output stage guarantees low output impedance and tight load-step regulation across the full dynamic range. Combined, this topology achieves the high efficiency and low noise floor required for 48 V distribution architectures. Typical applications include 48 V direct-to-PoL conversion in AI servers and high-performance computing, telecom and datacom equipment bridging 48 V to 12 V rails, industrial 48 V battery systems, and high-density computing accelerators that need a regulated 12 V intermediate bus from a 48 V backbone. Designers should pair the DCM3717 with an upstream 48 V hold-up capacitor and ensure the PCB layout follows Vicor's recommended thermal-via pattern under the SM-ChiP baseplate to dissipate up to 30 W of losses at full load. This page aggregates verified distributor pricing, same-brand drop-in variants from the Vicor DCM family, and practical design notes drawn from the Vicor datasheet to help engineers pick, place, and procure the right module.
DCM3717S60E13G5TN1 - 750W 40-60V to 12.2V Non-Iso PoL | Vicor
The Vicor DCM3717S60E13G5TN1 is a non-isolated, regulated point-of-load DC-DC converter module delivering 750 W continuous (900 W peak) from a semi-regulated 40 V to 60 V input to a 10.0 V to 12.5 V regulated output (12.2 V nominal at 61.5 A), housed in the surface-mount SM-ChiP (ChiP) package. It uses Vicor's patented ZVS (zero-voltage switching) buck-boost regulator stage followed by a Sine Amplitude Converter (SAC) secondary stage, reaching peak efficiency of 96.5% to 97.0%. A non-isolated point-of-load (PoL) DC-DC converter module is a high-density power component that steps a higher intermediate bus voltage down to a low, well-regulated rail that sits immediately adjacent to a load IC such as a CPU, GPU, ASIC, or FPGA. The DCM family sits in the power-management hierarchy: DC-DC converter -> non-isolated PoL module -> voltage regulator -> power management IC -> semiconductor. By eliminating the isolation barrier and integrating magnetics, switching FETs, and control within a single SM-ChiP package, these modules deliver far higher power density than discrete buck designs while simplifying EMI, thermal, and layout work for the system engineer. Key features include 750 W continuous / 900 W transient peak output power, 61.5 A continuous load current, 96.5% to 97.0% peak efficiency, and parallelable operation for higher power. The SM-ChiP surface-mount package enables top-side cooling and reflow soldering while exposing a low thermal resistance path for cold-plate or heatsink attachment in dense compute, networking, and industrial platforms. Architecturally, the ZVS buck-boost front stage produces a regulated bus that feeds the SAC secondary stage; the SAC operates as a soft-switched resonant topology that delivers clean, low-noise output without the large output LC filters required by conventional buck converters. The result is fast transient response and tight regulation suitable for powering low-voltage, high-current silicon with minimal bulk capacitance. Typical applications include 48 V direct-to-point-of-load conversion for AI accelerator cards, GPU and CPU core rails in hyperscale servers, telecom and networking switch fabrics, industrial 48 V bus systems, and battery or renewable-energy intermediate bus architectures. Compared with discrete multi-phase buck regulators, the DCM3717S60E13G5TN1 removes PCB area, switching losses, and magnetics design effort from the engineer's plate. When designing with this part, ensure adequate cold-plate or top-side thermal management - the SM-ChiP package is intended for surface-mount solder attachment plus an external thermal spreader. Confirm that input bulk capacitance meets the datasheet's low-impedance requirement at the 40 V to 60 V rail, and observe polarity marking before reflow. This page consolidates Vicor datasheet parameters, real-time distributor pricing, drop-in DCM-family alternatives, and practical design notes not assembled in any single source, giving engineers a one-stop reference for the DCM3717S60E13G5TN1.
DCM3717S60E14G5TN0 - 750W 48V to 12V Non-Isolated DCM | Vicor
The Vicor DCM3717S60E14G5TN0 is a non-isolated, regulated DC-DC converter module in the SM-ChiP (Surface-Mount ChiP) package, operating from a semi-regulated 40V to 60V input to produce a regulated point-of-load output of 10.0V to 13.5V at up to 62.5A continuous (750W) or 75A transient peak (900W). It uses Vicor's patented ZVS buck-boost first stage followed by a ZVS/ZCS Sine Amplitude Converter (SAC) current-multiplier second stage, achieving 97.0% peak efficiency. A DC-DC converter module is a complete, encapsulated power subsystem that converts one DC voltage to another at high efficiency. The DCM3717 belongs to Vicor's DCM family of non-isolated point-of-load (PoL) modules; non-isolated means there is no galvanic barrier between input and output, which trades isolation safety for higher power density, lower cost, and simpler PCB layout. Within the broader taxonomy, DCM sits as a brick-level DC-DC converter module → DC-DC converter → power management IC → semiconductor. These modules are commonly deployed at the 48V bus to point-of-load boundary in modern computing, communications, and industrial architectures. Key features include a wide 40V to 60V input range matched to nominal 48V rails, a wide 10.0V to 13.5V programmable output range, 97.0% peak efficiency, switching frequency above 1 MHz, integrated PMBus-compatible telemetry for voltage, current, and temperature monitoring, and a thermally-adept SM-ChiP package. The two-stage ZVS architecture eliminates high-voltage switching losses while the SAC stage provides current multiplication with zero-current switching, yielding low EMI and high step-down ratios. Typical applications include 48V direct-to-PoL conversion in data center and AI server racks, industrial 48V bus distributed-power architectures, high-current 12V intermediate bus generation for downstream point-of-load converters, and telecom equipment using 48V backplanes. PMBus telemetry enables real-time monitoring for predictive maintenance in smart power systems. When designing with the DCM3717, account for the input and output bulk-capacitance requirements defined in the datasheet to manage ripple and hold-up, and provide adequate PCB copper area or thermal interface material because the SM-ChiP package is designed for both through-hole and surface mounting with top-side thermal attachment. The high switching frequency minimizes external LC filter size, but input fusing and TVS protection at the 60V maximum input remain required for robust 48V bus operation. This page synthesizes distributor pricing, datasheet specifications, drop-in alternatives and practical design notes not found in the standalone manufacturer datasheet.
DCM3717S60E14G5TN0 - 750W 48V-to-PoL DC-DC Module | Vicor
The Vicor DCM3717S60E14G5TN0 is a non-isolated, regulated DC-DC converter module in the SM-ChiP package that delivers up to 750 W (62.5 A at 12 V nominal) from a semi-regulated 40-60 V input bus to a point-of-load output range of 10.0-13.5 V, with a typical trim point of 12.2 V. The module integrates Vicor's patented zero-voltage switching (ZVS) buck-boost regulator stage followed by a Sine Amplitude Converter (SACTM) output stage for low-noise, high-bandwidth regulation. A DC-DC converter module is a self-contained, surface-mountable power conversion brick that combines the power stage, magnetics, control loop, and protection circuitry in a single package, allowing designers to drop a high-performance regulated rail onto a board without laying out a switching converter themselves. The DCM family sits within Vicor's broader ChiP (Converter housed in Packaging) platform hierarchy: DC-DC converter module -> isolated/non-isolated POL module -> SM-ChiP -> surface-mount power component. These modules are widely used to bridge a 48 V distribution bus directly to a lower-voltage point-of-load, replacing intermediate bus converters and multi-stage discrete designs. Key features of the DCM3717S60E14G5TN0 include 750 W continuous output power, 96% typical peak efficiency, >1 MHz effective switching frequency, and parallelable operation for higher power levels. The non-isolated topology trades galvanic isolation for high power density and low part count, while the ZVS/SACTM combination minimizes switching losses and output ripple compared with conventional hard-switched buck converters. Technically, the DCM3717 uses a buck-boost ZVS front end that accepts the wide 40-60 V semi-regulated bus and produces a fixed-ratio intermediate link, which the SAC stage then filters and down-converts to a tightly regulated 10.0-13.5 V output. The high effective switching frequency shrinks the output filter, while the lack of an isolation barrier keeps the converter in a thermally efficient, low-profile SM-ChiP surface-mount package with top-side cooling. Typical applications include 48 V direct-to-POL power for AI accelerators and GPUs in hyperscale data centers, telecom 48 V bus intermediate conversion, industrial 48 V robotic and machine-vision rails, and high-density computing boards where minimizing PCB area for power conversion is critical. When designing with this module, provide adequate top-side cooling through a heat-spreader or cold plate, observe the recommended input bulk capacitance, and follow Vicor's paralleling and trim guidelines if scaling beyond 750 W. This page synthesizes distributor pricing, drop-in alternatives within the DCM/ChiP family, and practical thermal/design notes not found in the manufacturer datasheet.
DCP020505U/1K - 2W Isolated DC/DC 5V 400mA | Texas Instruments
The Texas Instruments DCP020505U/1K is a 2 W isolated, unregulated DC/DC converter module delivering 5 V at up to 400 mA from a 4.5 V to 5.5 V input, in a surface-mount SOP (SOIC) package with 1 kV galvanic isolation. An isolated DC/DC converter module is a complete switching power supply that transfers energy across a galvanic isolation barrier, creating a floating output rail that is electrically independent of the input. Within the power management hierarchy - voltage regulator, isolated DC/DC converter, power module - these devices break ground loops, provide level shifting to floating domains, and generate isolated supplies for gate drivers, isolated communication interfaces, and isolated sensors. The DCP02 series belongs to this isolated converter module category. Key features of the DCP020505U/1K include the 2 W output power in a miniature surface-mount footprint, on-chip protection with overtemperature shutdown (OTP), an output-disable function, and a synchronization pin allowing multiple modules to lock to a common switching frequency, minimizing beat-frequency interference. Efficiency is approximately 80% at full load. The push-pull power-stage topology with an 800 kHz internal oscillator enables the compact magnetic design and small external component count - typically only input and output filter capacitors are required. Architecturally, the module integrates a controller, power switches, and a miniature isolation transformer. Because the output is unregulated, the 5 V output tracks the input voltage and load; designs needing tighter tolerance should add a post-regulator such as an LDO on the isolated side. Typical applications include isolated RS-485/CAN transceiver supplies, isolated gate-drive bias for power semiconductors, analog-isolated data acquisition front ends, and industrial PLC I/O channel isolation where a small, low-noise isolated 5 V rail is required. Design consideration: because the output is unregulated, output voltage droop with load must be budgeted; verify the isolated-side load stays within 400 mA and consider post-regulation for precision rails. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
DCR010505U/1K - 1W Isolated DC/DC Converter 5V 200mA | TI
The Texas Instruments DCR010505U/1K is a miniature 1W isolated, regulated DC/DC converter module delivering a single 5V output at up to 200mA from a 5V nominal input (4.5V to 5.5V, +/-10% range), housed in a 12-pin SOIC (DVB) surface-mount package. An isolated DC/DC converter is a power management module that transfers electrical energy across a galvanic isolation barrier, breaking ground loops and protecting downstream circuitry from upstream voltage transients. Within the power system hierarchy, isolation modules sit between a primary power rail and sensitive analog, communication, or sensor circuitry, combining transformer isolation with on-module regulation - a distinct class from non-isolated buck/boost regulators. Key features of the DCR01 family include 1000Vrms isolation (1kV operational isolation, 1-second test), a continuous working voltage across the barrier of 60 VDC or 42.5 VAC, and UL1950 component recognition. The module switches at 400 kHz, supports device-to-device synchronization for multi-module systems, and provides thermal protection plus output short-circuit protection. With 53 W/in3 (3.3 W/cm3) power density and a reliability figure of 125 FITS at 55C, the part suits space-constrained isolation designs. Architecturally, the DCR01 series integrates the power transformer, switching controller, synchronous rectification, and error amplifier into a single molded SOIC package, eliminating the design effort of a discrete isolated flyback supply. Output regulation accuracy is high across line and load, and output ripple noise is very low per the family description. Typical applications include isolated RS-485/RS-232 transceiver supplies, isolated gate-drive and analog-front-end bias rails in industrial automation, isolated sensor and data-acquisition systems, and ground-loop breaking in medical and test equipment front ends. A key design consideration: this module is a 5V-in variant, so the primary rail must stay within 4.5V-5.5V; for 12V or 24V rails, use DCR011 or DCR012 family members with the same footprint. Always verify derating versus load and ambient temperature per the datasheet. This page synthesizes distributor stock status, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Pricing is available on request as of 2026-10-19.
DCR010505U/1KE4 - 1W Isolated DC/DC Module 5V 200mA | Texas Instruments
The Texas Instruments DCR010505U/1KE4 is a miniature 1W isolated, regulated DC/DC converter module delivering a single 5V output at up to 200 mA from a 4.5V to 5.5V input, housed in a 12-pin SOP surface-mount package with 1000Vrms galvanic isolation. An isolated DC/DC converter is a power management module that transfers energy across a galvanic isolation barrier, breaking ground loops and protecting downstream circuitry from hazardous voltages. Within the power-conversion hierarchy - voltage regulator, then DC/DC converter, then isolated DC/DC module - the DCR01 family sits at the board-mount module level, integrating the transformer, switching stage, and regulation loop in one standard JEDEC outline suited to high-volume assembly. Key features include 1000Vrms operational isolation (1-second test), a 400kHz switching frequency enabling a power density of 53 W/in3 (3.3 W/cm3), device-to-device synchronization for parallel or multi-channel designs, thermal protection, and short-circuit protection. The module is UL1950 recognized, and the isolation barrier is rated for 60 VDC / 42.5 VAC continuous working voltage. Architecturally, the DCR01 series uses a high-frequency switching topology with an integrated isolation transformer and a regulation loop that holds the output within tight limits (approximately 4.9V to 5.1V per distributor parametric data), giving very low output noise compared with unregulated converter modules. The 125 FIT reliability figure supports long-life industrial designs. Typical applications include isolated interface power for RS-485 and CAN transceivers, isolated analog front ends in industrial automation, and ground-loop elimination in test and measurement equipment. A key design consideration: because this is a fixed 5V-input part, upstream rail tolerance must stay within the ±10% (4.5V to 5.5V) window; use the DCR012405 variant for 24V buses. This page synthesizes distributor data, drop-in alternatives, and practical design notes beyond the manufacturer datasheet.
DP83848I-POE-EK - DP83848I 10/100 PoE PHY Evaluation Kit | TI
The Texas Instruments DP83848I-POE-EK is the official evaluation board for the DP83848I PHYTER industrial-temperature single-port 10/100 Mb/s Ethernet Physical Layer Transceiver, packaged as a complete Power-over-Ethernet reference design. It integrates an isolated flyback DC/DC converter that delivers 3.3 V from the 48 V PoE input, allowing engineers to power the PHY directly from a PoE source without any external supply. The board exposes the MII/RMII interface, RJ-45 magnetics, and configuration jumpers so the user can exercise HP Auto-MDIX, Energy-Efficient Ethernet, and 10BASE-T/100BASE-TX link modes straight out of the box. An Ethernet PHY transceiver is the physical-layer device that sits between a digital MAC and the copper magnetics of an RJ-45 jack. It handles line coding, link-pulse detection, echo cancellation, and adaptive equalization so the MAC sees a clean MII/RMII bus. The DP83848I-POE-EK falls under Power Management > DC-DC Converters / Specialized Evaluation Boards, which itself sits inside the broader hierarchy of Power Management & Development Tools for industrial Ethernet, factory automation, and IP-camera designs. Key features include industrial-temperature operation from -40 °C to +85 °C, integrated PoE PD (powered device) interface compliant with IEEE 802.3af, an isolated single-output flyback DC/DC stage that produces 3.3 V at the load, programmable LED status indicators for link, speed, activity, and duplex, and on-board MSP430-grade headers for jumper configuration. The 10/100 Mb/s PHY core delivers cable diagnostics and Auto-MDIX for cross-over-cable-free operation. Deeper technical detail is provided in the architecture of the DC/DC stage: a current-mode flyback with primary-side regulation, 1500 V isolation, and synchronous switching chosen for thermal efficiency. The PHY itself uses TI's proprietary DSP-based echo canceller and baseline-wander correction, allowing it to exceed the IEEE 802.3 100BASE-TX return-loss template without external chokes beyond the integrated magnetics. Typical applications include industrial Ethernet nodes and PLCs, PoE-powered IP cameras, factory sensor hubs and IoT gateways, building-automation controllers, and remote wireless access points where a single Ethernet cable carries both data and power. Pairing the kit with a Linux-bound MAC over MII or RMII lets a developer validate end-to-end link integrity within hours. The most important design consideration when using this kit is thermal management of the flyback regulator at full PoE load; the 48 V-to-3.3 V conversion dissipates real power and the layout must keep the input capacitor return path short. Always observe the 802.3af inrush limits when interfacing to midspan or endpoint PSE equipment. This page synthesizes distributor pricing, drop-in alternative evaluation kits, application notes, and PCB-layout considerations not consolidated in the manufacturer's product brief.
E-UC3844BD1 - 500kHz Current Mode PWM Controller, 8-SOIC
The STMicroelectronics E-UC3844BD1 is a high-performance, fixed-frequency current-mode PWM controller IC that delivers the building blocks required for off-line and DC-to-DC converter topologies in an 8-pin SOIC package. It supports switching frequencies up to 500 kHz, operates from a self-biased 11.5 V to 25 V supply rail, and provides up to 50% maximum duty cycle for single-ended forward and flyback designs. The trimmed oscillator is guaranteed to 250 kHz on the timing resistor/capacitor network, enabling precise frequency programming without external compensation. A current-mode PWM controller is an integrated circuit that regulates output voltage by directly modulating the peak inductor current on a cycle-by-cycle basis, instead of controlling only the output voltage. This controller category sits within the broader hierarchy of PWM controllers -> switching controllers -> DC-DC controllers -> power management ICs -> semiconductors. Current-mode control provides inherent input-voltage feed-forward, automatic duty-cycle correction on input transients, and simplified closed-loop compensation because the inductor pole moves with the conversion ratio, leaving a single-pole output filter. Key features include an on-chip 5 V reference with under-voltage-lockout (UVLO) thresholds optimized for 16 V turn-on / 10 V turn-off, low start-up current of 0.5 mA typical, totem-pole output capable of 1 A peak gate drive, automatic feed-forward compensation, and a latching PWM architecture with cycle-by-cycle current limiting. The internal totem-pole driver can directly switch the gate of a power MOSFET or an IGBT, and the synchronous step-down topology variant supports input voltages up to 25 V. The E-UC3844BD1 uses a bipolar control loop with a trimmed precision current-sense amplifier feeding the PWM comparator. Compared to the UC3842 (no UVLO) and UC3843 (8.4 V/7.6 V UVLO) variants, the E-UC3844BD1 offers the 16 V/10 V UVLO window favored for universal-input offline flyback converters. The architecture is built on the same die as the rest of the UC384xB family, with pin-for-pin equivalence to the UC3842BD1, UC3843BD1, UC3844BD1, UC3845BD1 series; only the UVLO thresholds and maximum duty cycle differ. Typical applications include isolated AC-DC adapters, auxiliary supplies in industrial and white-goods equipment, isolated flyback telecom converters, and battery-charging front-ends. Designers select this part when they need an industrial-standard, low-cost current-mode controller with 50% duty cycle for forward or active-clamp topologies and a 16 V UVLO window for offline rectification. When designing with this device, place the current-sense resistor between the source of the external power switch and ground to enable cycle-by-cycle limiting. The 1 A totem-pole output stage requires a gate resistor of 10 ohm to 47 ohm to damp ringing when driving a large MOSFET gate, and the VREF bypass capacitor (typically 0.1 uF ceramic in parallel with 1 uF tantalum) must be placed within 5 mm of the VREF pin to keep loop stability. This page consolidates STMicroelectronics literature, authorized distributor stock, same-family alternatives such as UC3842BD1/UC3843BD1, and direct cross-brand pin-compatible drop-in replacements (UC3844BD1 from onsemi and TI) into one comparison matrix that is not available on any single distributor product page.
FAN2001MPX - 1A 5.5V Sync Buck Converter, 1.3MHz | onsemi
The onsemi FAN2001MPX is a high-efficiency, low-noise synchronous PWM current-mode and Pulse Skip (Power Save) mode DC-DC step-down converter that delivers up to 1 A of output current over a wide input voltage range of 2.5 V to 5.5 V. Housed in a compact 6-pin WDFN Exposed Pad package, it achieves 96% peak efficiency with 1.3 MHz fixed-frequency PWM operation, making it well suited for space-constrained portable and battery-powered designs. A buck (step-down) DC-DC converter is a switched-mode power supply topology that efficiently converts a higher DC input voltage to a lower DC output voltage by rapidly switching an inductor between charge and discharge phases. Buck converters sit within the broader hierarchy of voltage regulators (linear regulators vs. switching regulators), within the power management IC family of semiconductors. Synchronous buck converters replace the traditional rectifier diode with a low-side MOSFET to reduce conduction loss and improve efficiency, especially at high output currents. Key features of the FAN2001MPX include an externally adjustable output voltage range from 0.8 V up to VIN (5.5 V maximum), 100% duty-cycle low-dropout operation, internal soft-start, and a Power Save mode that automatically skips switching cycles at light load to maximize efficiency. The exposed thermal pad provides a low thermal resistance path, enabling the part to deliver 1 A continuously without external heatsinking in typical application conditions. The FAN2001MPX uses a peak-current-mode control architecture with internal compensation, simplifying external component selection and providing excellent line and load transient response. The 1.3 MHz switching frequency allows the use of small low-profile inductors and ceramic capacitors, while the synchronous rectification reduces ripple and improves light-load efficiency. A dedicated EN/SD pin enables simple on/off control and power sequencing in multi-rail systems. Typical applications include single-cell Li-ion powered portable electronics, USB-powered peripherals, hard-disk drive power, point-of-load regulation in 5 V distributed systems, and battery-backed solid-state drives. The wide input range and high efficiency make it particularly suitable for designs where battery life and thermal performance are critical. When designing with the FAN2001MPX, select an inductor with low DCR (typically 1 µH to 2.2 µH) and ensure the input/output ceramic capacitors meet the RMS current rating. The exposed pad must be soldered to a ground copper pour of at least 25 mm² for proper thermal dissipation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineers with a complete selection reference for portable power designs.
FAN4855MTC - 500mA Boost Regulator, Adjustable | Fairchild
The Fairchild Semiconductor (onsemi) FAN4855MTC is a 500 mA high-efficiency PFM boost switching regulator with adjustable output, shutdown, and low battery detect, housed in an 8-TSSOP (0.173 inch, 4.40 mm width) package with 8 pins and surface mounting. A boost regulator is a type of switch-mode DC-DC converter that steps an input voltage up to a higher regulated output voltage using an inductor, a switching element, and a diode. Within the power management hierarchy, the FAN4855 sits under switching regulators, which belong to voltage regulators and power management ICs. Boost converters are essential in battery-powered systems where the cell voltage sags below the level required by the load, such as converting two NiCd/NiMH cells (approximately 1.8 V to 3.0 V) to a 5 V rail. Key features include low-power PFM (pulse frequency modulation) control for high efficiency at light loads, an input voltage range extending to 4.5 V, an adjustable output voltage range of approximately 3 V to 5 V, up to 500 mA maximum switch current, and an integrated low battery detect comparator with shutdown mode for power conservation. According to the Fairchild Semiconductor datasheet, the device targets low-voltage DC-DC conversion in 2-cell battery-powered systems. Technically, the FAN4855 uses asynchronous PFM boost architecture: the internal NPN switch is driven until the current limit or peak threshold is reached, then the inductor energy is released through an external Schottky diode into the output capacitor. PFM operation eliminates the switching-frequency clock of PWM converters, reducing quiescent power and improving efficiency in portable applications. Typical applications include digital cameras, cell phones, and PDAs, as well as any 2-cell alkaline or NiMH product needing a stable 5 V logic or display rail. A key design consideration: PFM regulators exhibit variable switching ripple, so output filtering and PCB layout of the inductor and Schottky diode loop require attention for noise-sensitive loads. This page synthesizes distributor pricing, drop-in alternative data, and practical design notes not found in the manufacturer datasheet.
FAN5308MPX - 800mA 5.5V Sync Step-Down DC-DC | onsemi
The onsemi FAN5308MPX is an 800 mA high-efficiency, low-noise synchronous step-down (buck) DC-DC converter designed for use in battery-powered applications. Housed in a 6-pin WDFN (MLP) exposed-pad package, it integrates the high-side and low-side MOSFETs and operates from a 2.5 V to 5.5 V input rail, delivering an externally adjustable output voltage from 0.8 V up to 5.5 V. According to the manufacturer datasheet, the device achieves up to 96% efficiency and uses a fixed-frequency 1.3 MHz PWM controller that automatically transitions into a pulse-skipping power-save mode at light load to maximize battery life. A buck (step-down) DC-DC converter is a switching-mode power supply topology that uses an inductor, a switch, and a rectifier to convert a higher input DC voltage into a lower output DC voltage with far higher efficiency than a linear regulator. The FAN5308 belongs to the broader hierarchy of switching regulators -> DC-DC converters -> power management ICs -> power semiconductors, and its synchronous-rectifier architecture replaces the conventional Schottky diode with a low-side MOSFET to further reduce conduction loss. Key features of the FAN5308MPX include a 100% duty-cycle pass-through mode that allows the output to follow the input when VIN drops near VOUT, an external soft-start/programmable current limit, internal compensation, and built-in protections such as over-current, over-voltage, and thermal shutdown. The 1.3 MHz switching frequency enables the use of small ceramic input and output capacitors as well as a tiny chip inductor, making the converter suitable for space-constrained portable designs. Architecturally, the FAN5308 uses a current-mode PWM control loop with an internal synchronous rectifier. Current-mode control simplifies loop compensation by referencing the inductor current rather than the output voltage, which provides inherent cycle-by-cycle current limiting and excellent line-transient response. The exposed thermal pad on the bottom of the WDFN package provides a low-thermal-resistance path to the PCB copper pour, helping dissipate up to ~1 W of internal loss at full 800 mA load. Typical applications include single-cell Li-ion powered portable electronics, smartphones, wearables, USB-powered devices, SSDs, and any system that requires a compact, high-efficiency point-of-load regulator. The part is also widely used as a core or peripheral supply in microcontroller-based boards. A key design consideration is inductor selection: a 1.0-2.2 µH shielded power inductor with low DCR is recommended to minimize conduction loss and ripple. Ensure the input and output ceramic capacitors are rated for at least 6.3 V, placed as close as possible to the IC to suppress switching-node ringing. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
HPA01043PWPR - IEEE 802.3at PoE Interface + DC-DC Controller | TI
The Texas Instruments HPA01043PWPR is a high-power, high-efficiency PoE (Power over Ethernet) interface and DC-DC controller that integrates an IEEE 802.3at powered device (PD) interface with a current-mode PWM controller in a 20-pin HTSSOP (PWP) package with PowerPAD, rated for operation from -40C to +125C. A PoE PD interface is the front-end circuit that performs detection, classification, and inrush-current limiting when a device such as an IP camera, wireless access point, or network switch is powered over Ethernet cabling. It sits within the power management IC hierarchy, bridging the IEEE 802.3at physical layer and the downstream isolated or non-isolated DC-DC converter that generates the system rails. Key features include full compliance with the IEEE 802.3at high-power PoE standard, integrated detection and classification signature circuits, and a built-in current-mode DC-DC controller with a maximum switching frequency of 278 kHz, enabling compact magnetics and high conversion efficiency. The device supports up to 1.1 A output current capability in switching controller operation, and the PowerPAD HTSSOP-20 package provides low thermal impedance for high-power PD designs. Technically, the PD interface handles the 25 kOhm detection signature, class signaling, and controlled inrush startup, while the PWM section uses peak current-mode control for cycle-by-cycle current limiting, good transient response, and straightforward loop compensation. This single-chip integration reduces external component count compared to a discrete PD controller plus separate PWM controller solution, improving reliability and BOM cost in high-volume network hardware. Typical applications include IEEE 802.3at powered IP network cameras, 802.11ac/ax wireless access points, VoIP phones, PoE-enabled LED lighting drivers, and industrial Ethernet endpoints that must draw 25.5 W or more from the PSE. Design consideration: verify the external MOSFET and sense resistor ratings against the inrush and fault current limits, and follow the PowerPAD layout guidance for thermal dissipation. This page synthesizes distributor data, cross-reference alternatives, and practical design notes not found in the manufacturer datasheet, with pricing verified as of 2026-10-19.
HPA01124PWPR - IEEE 802.3at PoE Interface + DC/DC Controller | TI
The Texas Instruments HPA01124PWPR is an IEEE 802.3at high-efficiency Power over Ethernet (PoE) interface and DC-DC controller that integrates powered-device (PD) interface functions with a current-mode switching controller, delivering up to 1.1 A output current while operating from a maximum input voltage of 57 V. It is housed in a 20-pin HTSSOP (PW) package with power pad and is rated for operation from -40C to +125C, making it suitable for automotive-grade and industrial designs. A PoE interface and DC-DC controller is a power management IC that performs the IEEE 802.3at powered-device handshake (detection, classification, and inrush-current limiting on the Ethernet power pair) and then controls an external DC-DC converter stage that steps the 48V-class PoE input down to the system rail. In the power management hierarchy it sits between the PoE front end and the point-of-load regulators in powered devices such as IP cameras, wireless access points, and VoIP telephones. Key features of the HPA01124PWPR include compliance with the IEEE 802.3at standard (Type 2, up to 25.5 W at the powered device), a current-mode control architecture that simplifies loop compensation and gives fast transient response, high conversion efficiency for reduced thermal stress, and an extended -40C to +125C operating range. The single-chip integration of the PoE interface and switching controller reduces bill-of-material count compared with two-chip discrete solutions. Architecturally, the device combines the PD interface block with a PWM switching controller that drives external power MOSFETs. Current-mode control provides cycle-by-cycle current limiting, which protects the external MOSFET and transformer during overload and startup inrush events. The 57V maximum input rating covers the worst-case PoE PSE output voltage plus cable drop. Typical applications include IEEE 802.3at powered devices such as network IP security cameras, 802.11ac wireless access points, and PoE-powered LED lighting and building-automation nodes, where a single Ethernet cable must deliver both data and up to Class-4 power. When designing with this device, verify the external MOSFET voltage rating against the 57V maximum input plus switching spikes, and follow the datasheet layout guidance for the power-pad thermal connection. This page synthesizes distributor pricing, alternative-part guidance, and practical design notes that are not consolidated in the manufacturer datasheet.
HT79171 - 500kHz Sync Boost Converter 2A | Holtek
The Holtek HT79171 is a 500kHz synchronous step-up PWM DC-DC converter with a 2.2V to 5.0V input range, 2A continuous output current capability, and 5A peak current limit, housed in an 8-pin ESOP-8 package with exposed pad. It integrates ultra-low RDSON power MOSFETs rated at 25mOhm (main FET) and 45mOhm (synchronous FET), eliminating the need for external rectifier or control transistors. A synchronous step-up (boost) converter is a class of switching voltage regulator that raises a lower input voltage to a higher regulated output voltage. Unlike non-synchronous boost topologies that use a Schottky diode as the rectifying element, a synchronous boost replaces the diode with an integrated MOSFET, reducing conduction losses and significantly improving conversion efficiency, which is critical in battery-powered systems. Boost converters sit within the broader power management IC hierarchy, alongside buck (step-down), buck-boost, and charge-pump regulators. Key differentiating features of the HT79171 include its 500kHz fixed switching frequency, which permits the use of small inductors and ceramic capacitors for a compact bill of materials, its wide 2.2V to 5.0V input span that covers single-cell lithium-ion battery discharge curves (typically 2.5V to 4.2V), and its adjustable current limit. According to the Holtek datasheet, connecting a resistor of 20kOhm to 100kOhm on the OC pin scales the default 5A peak current limit down to as low as 1A, allowing designers to trade peak capability against inductor saturation margin. Architecturally, the HT79171 uses a PWM control scheme with integrated power switches optimized for low RDSON to maximize efficiency at multi-amp load currents. The synchronous rectification stage avoids the large diode-drop losses that would otherwise dominate at low output voltages, improving light-load behavior and overall conversion efficiency. Internal protection features include cycle-by-cycle peak current limiting and fault handling suitable for battery-powered designs. Typical applications include portable power banks (the primary documented use case), lithium-battery-powered portable equipment, and any 2.2V to 5.0V input boost regulation rail up to 2A continuous output. The 500kHz switching frequency supports small-footprint USB power bank PCBs. A key design consideration is inductor selection: the inductor saturation current must exceed the configured peak current limit with margin, since the OC pin setting directly determines peak inductor current. This page synthesizes distributor availability data, the official Holtek datasheet, and end-of-life cross-reference information into a single engineering resource not found on any single source page.
HUB2200-S - 2200 µF Hold-up Box for VIPAC | Vicor
The Vicor HUB2200-S is a 2200 µF hold-up capacitor module designed as a dedicated accessory for the Vicor VIPAC family of component power front-end systems. Packaged as a sealed hold-up box/arm sized at 2.858 inches, it provides the bulk energy storage required to ride through input-voltage dropouts and brownouts that would otherwise reset or interrupt downstream DC-DC converter rails. Within the broader VIPAC ecosystem, the HUB2200-S plays the role of an external hold-up (energy storage) module. A VIPAC front-end is a complete AC-DC or DC front-end subsystem; the HUB2200-S bolts onto it and adds capacitance so that, when the input bus sags, the downstream converter modules see a sustained input voltage long enough to maintain regulation. This category of hold-up capacitor belongs to the larger family of bulk energy storage accessories used with modular AC-DC front-ends and DC-DC hold-up circuits. Common synonyms for these modules are "hold-up box," "hold-up capacitor," "bulk storage module," and "DC hold-up accessory." Key features of the HUB2200-S include a 2200 µF bulk capacitance rating, a hold-up box/arm form factor of 2.858 in, and electrical/mechanical compatibility with all VIPAC-family front-end power supplies. Each module is engineered, tested, and supplied by Vicor, the original manufacturer of the VIPAC platform, ensuring that hold-up time, inrush behavior, and discharge characteristics match the front-end's published specifications. The module connects to the VIPAC via the dedicated hold-up interface on the front-end chassis and is intended to be field-replaceable without desoldering. Technically, the HUB2200-S is built around low-ESR aluminum electrolytic capacitor technology optimized for high-energy pulse discharge rather than ripple filtering. The 2.858 in package is keyed to the VIPAC hold-up rails, providing both positive and negative polarity protection. It is specified for use across the industrial temperature range typical of VIPAC deployment and is integrated into the front-end's safety/ground scheme. Designers typically select the capacitance value to achieve a target hold-up time at a given minimum input voltage, using Vicor's published hold-up time vs. capacitance curves. Typical applications include industrial process-control PLCs, factory-automation controllers, railway signaling electronics, military COTS power subsystems, and any VIPAC-powered system that must comply with ride-through specifications such as SEMI F47 or IEC 61000-4-11. The HUB2200-S is also used in medical and test & measurement instrumentation where brief input-voltage sags cannot be allowed to corrupt measurements or reboot processors. When designing with the HUB2200-S, verify the VIPAC front-end variant it is mating to - different VIPAC SKUs accept different hold-up box sizes, and pairing the wrong value can either under-size hold-up time or cause the front-end's inrush limiter to interpret the capacitance as a fault. Always consult the VIPAC datasheet and the HUB2200-S installation guide before substitution. This page synthesizes distributor pricing, alternatives sourcing notes, and practical VIPAC integration guidance not found in a single manufacturer datasheet.
ICE2HS01GXUMA1 - Half-Bridge LLC Resonant Mode Controller | Infineon
The Infineon ICE2HS01GXUMA1 is a high-performance resonant mode controller IC specifically designed for high-efficiency LLC resonant converters with secondary synchronous rectification, housed in a 20-pin PG-DSO-20-45 package. It is a buck regulator / step-down DC-DC controller IC supporting positive, isolation-capable output topologies for switch-mode power supplies. A resonant mode controller is a type of DC-DC switching controller that drives the primary switches of an LLC resonant converter. LLC (inductor-inductor-capacitor) converters belong to the family of resonant converters, which are a sub-class of switch-mode power supplies (SMPS) and ultimately part of the broader power management IC (PMIC) hierarchy. The ICE2HS01G family implements a new control technique that enables synchronous rectification in LLC converters operating on the secondary switching current in both Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) conditions, eliminating the need for a dedicated secondary-side synchronous rectification controller IC. Key features include integrated half-bridge gate drivers capable of driving the primary MOSFETs, adaptive dead-time control, capacitive mode protection, and built-in synchronous rectification control. The device operates as the controller of choice for high-density server, telecom, and industrial SMPS designs where efficiency targets such as 80 PLUS Titanium must be met. Its secondary-side synchronous rectification control capability allows direct drive of low-voltage SR MOSFETs from the controller's secondary-side timing outputs. Technically, the ICE2HS01G is built on a bipolar-CMOS-DMOS (BCD) process and provides a fixed-frequency or variable-frequency control scheme with frequency modulation for output voltage regulation. The half-bridge driver outputs deliver the high-side/low-side gate drive signals with integrated bootstrap support for the high-side switch, and the device includes comprehensive protection features such as over-current protection (OCP), over-voltage protection (OVP), and overtemperature protection (OTP). Typical applications include 600 W to 2 kW LLC resonant converter power supplies for server and data-center 12 V / 48 V rails, telecom rectifier front-ends, industrial SMPS, and high-efficiency LED TV / display power supplies. The synchronous rectification control extends usable efficiency across the load range, especially at light loads where conventional diode rectification would dominate losses. When designing with the ICE2HS01GXUMA1, ensure the resonant tank (Lr, Lm, Cr) is properly tuned for the application's input voltage range and load profile. Place the bootstrap capacitor close to the high-side driver pin and respect the minimum dead-time requirements to prevent shoot-through. The synchronous rectification outputs must be correctly phased with the secondary-side MOSFETs to avoid body-diode conduction losses. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineering value beyond raw specification listing.
ICE2QR2280GXUMA1 - 800V QR Flyback PWM Controller | Infineon
The Infineon ICE2QR2280GXUMA1 is an integrated quasi-resonant flyback PWM controller with an integrated 800V avalanche-rugged CoolMOS power switch, housed in a 12-pin PG-DSO-12-10 package. The device combines a current-mode quasi-resonant controller with a 800V/2.62 ohm (max) MOSFET and a startup cell, switching at a 52 kHz nominal frequency and reaching <100 mW standby power through Active Burst Mode. A quasi-resonant flyback controller is a type of AC-DC switched-mode power supply (SMPS) controller that switches the primary MOSFET near the drain-voltage valley, minimizing turn-on switching losses and EMI. It belongs to the broader class of offline PWM controllers within the power management IC hierarchy, used to convert rectified AC mains into isolated DC voltages for appliances, adapters, and industrial auxiliary supplies. Key features include a 800 V breakdown voltage on the integrated MOSFET, a 10.5 V to 27 V Vcc supply range with 18 V startup threshold, 50% maximum duty cycle, integrated current-mode control, and Active Burst Mode for sub-100 mW standby. The PG-DSO-12-10 package provides a thermally enhanced exposed-pad footprint suitable for 20 W-class auxiliary power designs without external heatsinking. The device uses Infineon's CoolMOS technology with an avalanche-rugged 800V cell, allowing direct rectification of universal AC mains (85-265 VAC) without additional input protection. The quasi-resonant valley-skipping controller adaptively shifts switching frequency based on load, optimizing efficiency across light and full-load conditions. Typical applications include low-power SMPS adapters, white goods auxiliary supplies, standby rails in white goods and TVs, smart meter and IoT device power, and industrial control auxiliary supplies. The 20 W power level makes the part well-suited for always-on appliances requiring ENERGY STAR standby compliance. When designing, ensure transformer leakage inductance is below 5% to prevent MOSFET avalanche overstress, and follow the reference snubber circuit from the manufacturer datasheet. The Vcc capacitor must be sized to sustain 18 V startup and 10.5 V UVLO thresholds under all load transients. This page synthesizes distributor pricing, drop-in same-package alternatives from the CoolSET-Q1 family, and practical design notes not collected in any single place on the manufacturer datasheet.
ICE2QS02GXUMA1 - 300W Quasi-Resonant Flyback PWM Controller | Infineon
The Infineon ICE2QS02GXUMA1 is a quasi-resonant (QR) current-mode flyback PWM controller IC in a PG-DSO-8 package, targeting power-conversion applications up to 300 W. It supports a switching frequency range of 20 kHz to 150 kHz, where the controller self-adjusts to the valley of the drain-voltage waveform to minimize switching losses and reduce EMI. The device is part of Infineon's CoolSET family and is designed for quasi-resonant offline flyback converters, offering a blend of high efficiency, low standby power, and integrated protection features. According to Infineon's product brief, the controller is intended for main converters in auxiliary-supplied systems where an external startup cell is unnecessary. A quasi-resonant flyback controller is a type of AC-DC PWM controller that operates the MOSFET in a manner that forces turn-on at a valley of the drain ringing after the transformer demagnetizes. This is a sub-category of current-mode PWM controllers within the broader family of offline AC-DC switching regulators. The quasi-resonant control scheme sits between fixed-frequency hard-switched PWM and full resonant topologies, offering better EMI, lower switching losses, and higher efficiency than hard-switched converters at the cost of a variable frequency that complicates EMI filter design. Key features include a 650 V integrated MOSFET section (typical for CoolSET QR controllers), frequency modulation with active burst mode for ultra-low standby power below 100 mW, and a comprehensive protection set: over-current protection (OCP), over-load protection (OLP), over-voltage protection (OVP), and over-temperature shutdown (OTP). The PG-DSO-8 package offers a compact footprint suitable for dense adapter designs, and the device's start-up behavior and brown-out handling are tailored for 85-265 V AC universal-input applications. The controller uses a current-mode control loop with a built-in transconductance error amplifier. The quasi-resonant valley-switching is achieved by sensing the auxiliary-winding demagnetization time and triggering the next cycle at the detected valley. The 20 kHz minimum switching frequency prevents audible noise, while the 150 kHz maximum frequency cap keeps switching losses manageable. Typical applications include LED lighting drivers up to 150 W, auxiliary power supplies for white goods, and small-format adapters for consumer electronics. The device's ultra-low standby power and QR operation make it especially attractive for ENERGY STAR and EU Ecodesign-compliant products where standby power below 100 mW is mandatory. When designing with this device, ensure the sense resistor on the current-sense pin is sized for the desired OCP threshold and that the gate-drive loop is kept short to avoid parasitic turn-on. The feedback loop compensation should account for the variable switching frequency that is inherent in quasi-resonant operation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ICE3A2065Z - 650V CoolSET-F3 Offline SMPS Controller | Infineon
The Infineon ICE3A2065Z is an off-line SMPS current-mode controller with an integrated 650V Depletion CoolMOS power switch and 650V startup cell, packaged in a 7-pin PG-DIP-7-1 (through-hole, PDIP-7) housing. It targets flyback topologies at a fixed 100 kHz switching frequency, delivers up to 28 W output power in typical adapter and auxiliary-supply designs, and supports Active Burst Mode for standby power consumption below 100 mW at no load. On-resistance (RDS(on)) is rated at 1.05 ohm maximum at 25 °C, with ESD protection of 3.0 kV HBM. An SMPS current-mode controller with integrated MOSFET is a category of power-supply IC that combines the control loop, gate driver, and high-voltage power switch in a single die. The current-mode architecture regulates the output by sensing peak primary current and comparing it to an error-amplifier-derived threshold on every switching cycle. By integrating the 650V MOSFET and startup cell, the CoolSET-F3 family reduces external component count, simplifies PCB layout, and improves reliability compared with discrete PWM-controller-plus-MOSFET designs. Key specifications include a VCC supply range of 8.5 V to 21 V, quiescent current of 7.1 mA, maximum drain current of 2.0 A pulsed, junction temperature range of -25 °C to 130 °C, and thermal resistance (RthJA) of 96 K/W. The integrated 650V CoolMOS withstands typical 85-265 VAC universal-input offline rectified rails with substantial derating margin. A Current Sense (CS) pin provides cycle-by-cycle peak-current limiting, while the internal current-mode PWM comparator generates the duty cycle from the CS signal and the internal reference ramp. Typical applications include low-power AC-DC adapters (sub-30 W), auxiliary standby supplies in white goods and appliances, DVD/STB standby rails, and low-power LED driver front ends. The wide 85-265 VAC input range and Active Burst Mode make it suitable for designs seeking ENERGY STAR or EuP Tier-2 standby compliance without an additional burst-mode controller IC. When designing with the ICE3A2065Z, size the CS sense resistor for peak primary current at minimum VIN, account for the 96 K/W thermal resistance when laying out PCB copper area, and ensure the VCC hold-up capacitor covers the IC's start-up sequencing before auxiliary winding takes over. Note that the part has reached end-of-life for new designs; Infineon recommends the ICE3A2065ELJ as the active replacement (different pinout and package - PCB rework required).
ICE3AR1080JGXUMA1 - 800V CoolSET Flyback 100kHz | Infineon
The Infineon ICE3AR1080JGXUMA1 is an enhanced 800 V MOSFET version of the CoolSET-F3R80 family, integrating an 800 V-rated CoolMOS power switch, a current-mode PWM controller, and a startup cell in a single PG-DSO-12-19 package. It implements flyback topology at a fixed 100 kHz switching frequency and includes a brownout feature, active burst mode for light-load standby, and built-in protections such as overload, over-temperature, open-loop, and VCC under-voltage lockout. An AC-DC offline switcher IC of this type combines the power MOSFET and the control IC in one package, enabling compact isolated and non-isolated SMPS designs. In the broader hierarchy, this part belongs to the CoolSET family of integrated power switches, which itself falls under AC-DC converters, which is a sub-category of power management ICs. The integrated approach simplifies flyback converter design for adapters, auxiliary supplies, and standby converters by reducing external component count and PCB footprint. Key features include an integrated 800 V avalanche-rated CoolMOS switch that tolerates harsh line transients, frequency jitter for improved EMI signature, and auto-restart protection for fault conditions. The brownout detection prevents the converter from operating at low input voltages where the transformer can saturate. Active burst mode reduces standby power consumption to well below 100 mW, supporting energy-efficiency regulations. The device operates from a VCC supply of 10.5 V to 25 V and supports a typical flyback power range up to around 15-20 W, depending on thermal design. Internally, the current-mode controller uses a 1.0 V peak-current sense threshold and supports duty cycle up to approximately 75%, enabling wide-range universal-mains operation (85 VAC to 265 VAC). Typical applications include smartphone and tablet chargers, white-goods auxiliary supplies, set-top box standby converters, DVD/Blu-ray auxiliary rails, and industrial metering or IoT gateway power supplies. The 800 V MOSFET rating provides additional safety margin in regions with unstable mains. When designing with this part, pay attention to the snubber network around the integrated MOSFET drain pin to limit voltage overshoot, and select a transformer with adequate primary inductance to keep peak currents within the 1.0 V sense threshold divided by the external sense resistor. This page synthesizes distributor pricing, drop-in alternatives from the CoolSET family, and practical design notes not found in a single manufacturer document.
ICE3AS03LJGXUMA1 - 100kHz CoolSET Flyback PWM Controller | Infineon
The Infineon ICE3AS03LJGXUMA1 is a 100 kHz fixed-frequency current-mode flyback PWM controller with integrated 500 V startup cell, designed for offline AC/DC converters up to 300 W. Housed in an 8-pin PG-DSO package, it integrates the power MOSFET driver and CoolSET protection features, simplifying isolated SMPS designs for adapters, set-top boxes, and LCD TV auxiliary supplies. The part operates from an 10.5 V to 25 V VCC supply and offers <100 mW standby power for energy-efficient standby operation. A CoolSET AC/DC flyback controller is a self-contained power supply building block that combines a current-mode PWM controller with an internal high-voltage startup transistor and a MOSFET driver on a single monolithic die. By integrating the startup cell, the controller eliminates the external startup resistor chain that would otherwise consume continuous power from the high-voltage rail, dramatically reducing standby losses. The current-mode topology falls within the broader category of switched-mode power supply (SMPS) controllers, which sit hierarchically above linear regulators and below transformer/inductor-based power conversion systems in the power management hierarchy. Key differentiating features include a 500 V integrated startup cell that withstands surge events on rectified mains, active burst mode for sub-100 mW standby power, built-in soft-start to limit inrush current, and frequency jittering for low EMI. The 100 kHz fixed switching frequency is internally trimmed, eliminating external RC timing components. Protection features include over-current protection (OCP), over-load protection (OLP), over-voltage protection (OVP), and VCC under-voltage lockout (UVLO). The auto-restart recovery scheme minimizes external component count while still satisfying safety agency requirements. From an architectural perspective, the ICE3AS03LJG family uses Infineon's 700 V CoolMOS-class technology for the integrated high-voltage section, with a precision current-sense input for cycle-by-cycle peak current control. The internal reference, oscillator, and PWM comparator are trimmed at wafer level for tight frequency tolerance. The current-mode control loop provides inherent input voltage feedforward, simplifying feedback compensation compared to voltage-mode architectures. Typical applications include low-power AC/DC adapters (5 W to 27 W mobile chargers), set-top box auxiliary supplies, LCD TV standby rails, white goods auxiliary power, and any isolated flyback topology requiring sub-100 mW standby consumption. Design considerations should account for the PG-DSO-8 thermal pad connection, the VCC hold-up capacitor sizing for brown-out ride-through, and the use of a Y-cap or transformer shield to meet EMI standards.
ICE3BR0680JZ - 800V CoolSET Fixed-Frequency SMPS Controller | Infineon
The Infineon ICE3BR0680JZ is a fixed-frequency CoolSET off-line SMPS current-mode controller integrating an 800 V avalanche-rugged CoolMOS power switch, a startup cell, and a current-mode flyback PWM controller in a single PG-DIP-7 package. It supports up to 40 W of output power for 15.75 A peak current capability with VDS max of 800 V and RDS(on) max of 0.71 Ω, switching at 65 kHz nominal frequency. The minimum supply voltage VCC min is 10.5 V, enabling robust startup from rectified mains. The integrated 800 V MOSFET eliminates external switch components and provides a compact isolated converter footprint. An SMPS current-mode controller is a power-supply integrated circuit that regulates the output of a switched-mode power supply by sampling both output voltage error and primary-side peak current each switching cycle, then commanding an internal power MOSFET. It belongs to the broader hierarchy of AC-DC converters, flyback controllers, and integrated power management ICs used in offline power designs. This category enables compact isolated power conversion for white goods, adapters, and auxiliary supplies. Key features of the ICE3BR0680JZ include an input brownout detection pin (BBA), active burst mode operation for standby power below 100 mW, extendable blanking time for overload protection, and an external auto-restart enable path. The active burst mode reduces no-load consumption to extremely low standby levels. Internal protection features include overcurrent, overvoltage, overtemperature, and open-loop detection with auto-restart behavior. Typical applications include 40 W isolated flyback adapters, white-goods auxiliary power supplies, DVD/STB standby rails, and industrial low-power offline converters. The wide 800 V drain rating allows universal-mains operation (85-265 VAC) without additional input protection components. Internal current-mode control simplifies loop compensation and provides inherent cycle-by-cycle current limiting. When designing with this device, ensure the VCC reservoir capacitor and BBA blanking-time network values are selected per Infineon application notes. The PG-DIP-7 package provides 7 through-hole pins suitable for wave or hand soldering and allows isolated creepage/clearance per safety standards.
ICE3BR1765JXKLA1 - 650V CoolSET F3R Offline SMPS | Infineon
The Infineon ICE3BR1765JXKLA1 is an integrated AC-DC power stage from the CoolSET F3R family that combines a 650 V CoolMOS power MOSFET with a fixed-frequency current-mode PWM controller in a single 8-pin PG-DIP-8 through-hole package. The integrated MOSFET is specified at VDS max of 650 V and RDS(on) max of 1.96 ohm, while the controller block runs at a fixed switching frequency of 65 kHz and supports a maximum output power of 25 W in flyback topology. The VCC supply range spans 10.5 V to 25 V, enabling broad input mains coverage including universal 85-265 VAC offline converters. A flyback converter is the most common topology for low-to-medium power isolated AC-DC switching power supplies, where the transformer's primary inductance stores energy during the MOSFET on-time and transfers it to the secondary during the off-time. The integrated power-stage approach (CoolSET) eliminates the need for an external MOSFET, gate driver, and many discrete protection parts - reducing BOM count, PCB area, and overall system cost for sub-25 W applications. This category sits within AC-DC converters -> power management ICs -> semiconductor devices. Key features include built-in 650 V avalanche-rated CoolMOS, integrated soft-start, frequency jittering for low EMI, auto-restart protection for open-loop, VCC overvoltage, overload, and overtemperature faults. The 65 kHz fixed frequency keeps the fundamental switching noise out of the AM radio band and simplifies input EMI filter design. The PG-DIP-8 package provides 8 mm of creepage distance between high-voltage drain pins and low-voltage signal pins, which is critical for offline safety isolation. Typical applications include mobile phone chargers, standby auxiliary supplies for white goods and TVs, DVD player standby rails, and any sub-25 W isolated AC-DC adapter or auxiliary SMPS. The universal VCC range also supports wide-input industrial auxiliary supplies. When designing with this device, ensure the snubber network across the transformer's primary leakage inductance is properly sized to keep the drain voltage spike below the 650 V BVDSS rating. The auto-restart fault timer is set by an external capacitor on the BAULT pin and should be reviewed against the application's hold-up requirements.