ICE501LDXTMA1 - CoolSET G5 65kHz Flyback Controller | Infineon
MPN: ICE501LDXTMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.75 | $17.50 |
| 100 | $1.55 | $155.00 |
| 500 | $1.38 | $690.00 |
| 1,000 | $1.2 | $1,200.00 |
ICE501LDXTMA1 Overview
A flyback controller is a type of switched-mode power supply (SMPS) controller that regulates output voltage by periodically storing energy in the primary-side transformer inductance during the switch on-time, then releasing it to the secondary side during the off-time. The ICE5 family belongs to the AC-DC converter category within power management ICs, and is specifically engineered for quasi-resonant or fixed-frequency discontinuous conduction mode (DCM) operation in adapters, white goods, and auxiliary supplies.
Key features include a 65 kHz fixed switching frequency, integrated 800V avalanche-rugged MOSFET, built-in soft-start, frequency jittering for low EMI, and comprehensive protection functions: over-current protection (OCP), over-voltage protection (OVP), over-temperature protection (OTP), over-load protection (OLP), VCC under-voltage lockout (UVLO), and auto-restart after fault. The PG-DSO-8 package provides a low thermal resistance path, supporting continuous operation at elevated ambient temperatures.
From an architectural standpoint, the device uses a current-mode control scheme with leading-edge blanking to suppress transformer leakage spike false tripping. The integrated 800V MOSFET allows direct connection to a rectified 230V AC mains without an external depletion-mode start-up device, simplifying the bill of materials. The PG-DSO-8 package is pin-compatible with the wider CoolSET ICE2/ICE5 family, enabling PCB layout reuse across power-rating variants.
Typical applications include 5W to 15W AC/DC adapters for white goods and consumer electronics, standby and auxiliary power supplies for major home appliances, LED lighting drivers, and metering power supplies. The 800V MOSFET rating provides sufficient voltage margin for universal AC input (85V to 265V AC) designs.
When designing with this device, ensure the transformer primary inductance and snubber network are sized for the chosen switching frequency and maximum duty cycle. The exposed pad must be soldered to a sufficient copper pour for thermal dissipation, and VCC hold-up capacitance must be sized to ride through short brown-out events without the controller re-entering start-up.
Drop-in alternatives for ICE501LDXTMA1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ICE5QR0680AG
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ICE2QR0680Z
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ICE5WR0680AG
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ICE501LDXTMA1 Maximum Ratings & Electrical Characteristics
| Product Family | CoolSET G5 (5th generation fixed-frequency flyback) |
| Topology | Isolated Flyback, current-mode PWM |
| Switching Frequency | 65 kHz (fixed) |
| Integrated Power MOSFET Breakdown Voltage | 800 V |
| Package | PG-DSO-8 (DSO-8 with exposed pad) |
| Mounting Type | Surface Mount |
| Operating Mode | DCM (Discontinuous Conduction Mode) |
| Over-Current Protection | Yes (cycle-by-cycle current limit) |
| Over-Voltage Protection | Yes (VCC OVP) |
| Over-Temperature Protection | Yes (OTP with auto-restart) |
| Over-Load Protection | Yes (OLP with auto-restart) |
| Brown-Out Protection | Yes (built-in line sense) |
| Soft-Start | Yes (internal) |
| Frequency Jittering | Yes (for low EMI) |
| Auto-Restart on Fault | Yes |
| RoHS Compliance | Compliant |
ICE501LDXTMA1 Pin Configuration
| Pin 1 | VCC β Supply voltage for control circuitry, internal regulator input |
| Pin 2 | GND β Ground reference for control and power stage |
| Pin 3 | FB β Feedback input from optocoupler / TL431 secondary-side error amplifier |
| Pin 4 | CS β Current sense input (primary-side shunt / current transformer) |
| Pin 5 | DRAIN β Drain of integrated 800V MOSFET (connected to transformer primary) |
| Pin 6 | NC β Not connected (per datasheet) |
| Pin 7 | NC β Not connected (per datasheet) |
| Pin 8 | VCC β VCC (alternate pin, connected to pin 1 internally) |
Typical Applications
ICE501LDXTMA1 is suitable for 6 applications: White Goods Auxiliary Power Supply, AC/DC Adapter for Consumer Electronics, LED Lighting Driver, Industrial Auxiliary / Standby Supply, Smart Meter / IoT Power Supply, Battery Charger for Cordless Tools.
White Goods Auxiliary Power Supply
The ICE501LDXTMA1 fits white-goods auxiliary supplies because its integrated 800V MOSFET handles universal AC input up to 265V AC with sufficient voltage margin, while the 65 kHz fixed-frequency operation with frequency jittering eases EN 55011 EMI compliance in household appliances. Its complete protection suite (OCP, OVP, OTP, OLP, brown-out) eliminates external supervisor ICs and supports IEC 60335-1 safety requirements. The PG-DSO-8 package with exposed pad allows compact PCB mounting inside tight appliance chassis, and auto-restart on fault enables unattended recovery from transient events. Typical applications include washing machine control-board standby rails, dishwasher UI power, refrigerator electronic-thermostat rails, and microwave oven auxiliary supplies.
Recommended
AC/DC Adapter for Consumer Electronics
The ICE501LDXTMA1 is well suited for 5W to 15W universal-input AC/DC adapters powering consumer devices such as set-top boxes, IoT gateways, and small appliances. Its integrated 800V MOSFET removes the need for an external switching transistor, reducing BOM count and PCB area, while current-mode control with leading-edge blanking prevents false OCP triggering from transformer leakage spikes. The 65 kHz fixed switching frequency simplifies transformer design and enables synchronization with downstream circuits. Frequency jittering reduces conducted EMI peaks, helping designs meet EN 55022 Class B without bulky filters. The compact PG-DSO-8 package supports slim adapter form factors.
Recommended
LED Lighting Driver
The ICE501LDXTMA1 serves as an isolated flyback controller for low-to-medium power LED drivers, including commercial downlights, wall sconces, and replacement lamp modules. Its 65 kHz fixed frequency combined with frequency jittering keeps conducted EMI below EN 55015 limits, while the integrated 800V MOSFET allows direct rectification of universal AC input without external depletion-mode start-up components. Constant-current LED regulation can be implemented on the secondary side with a TL431 plus optocoupler feedback loop, and the controller's built-in OVP protects the LED string from open-circuit fault conditions. The PG-DSO-8 package enables compact driver-PCBs that fit inside tight luminaire enclosures.
Recommended
Industrial Auxiliary / Standby Supply
The ICE501LDXTMA1 is an excellent fit for industrial auxiliary and standby supplies powering control logic, microcontrollers, and sensor circuits inside larger equipment. The integrated 800V avalanche-rugged MOSFET tolerates wide industrial input voltage transients and surge events, while the auto-restart fault behavior enables unattended recovery from brown-out conditions. The 65 kHz fixed frequency keeps the converter predictable and testable for industrial qualification, and frequency jittering eases EMI compliance for shared industrial environments. The PG-DSO-8 footprint is widely used in 5W-15W DIN-rail auxiliary supplies and PLC interface modules.
Recommended
Smart Meter / IoT Power Supply
The ICE501LDXTMA1 supports isolated low-power flyback supplies for smart meters, IoT gateways, and wireless sensor nodes that connect to AC mains. Its integrated 800V MOSFET, current-mode PWM, and comprehensive protection suite yield a compact BOM suitable for confined metrology enclosures, while frequency jittering helps meet EN 61000-6-3 EMI limits. The fixed 65 kHz operation provides predictable idle power consumption, and the device's auto-restart behavior on fault aligns with reliability expectations for unattended metering infrastructure. The PG-DSO-8 package enables PCB layouts compatible with smaller meter form factors.
Recommended
Battery Charger for Cordless Tools
The ICE501LDXTMA1 is suitable for AC-side flyback front-ends of cordless-tool battery chargers in the 5W-15W range, where universal AC input and isolated secondary-side CV/CC regulation are required. Its integrated 800V MOSFET tolerates rectified mains surges and supports compact PCB designs inside tool charger bases. Fixed 65 kHz operation enables predictable transformer saturation analysis and predictable EMI filter design, while auto-restart on fault simplifies production testing and field diagnostics. The PG-DSO-8 footprint is mechanically compatible with other CoolSET family members, enabling tool-OEM designers to reuse PCB layouts across product tiers.
Recommended
Recommended Products Summary
Engineering reference data for ICE501LDXTMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ICE5QR0680AG | ICE5BR0680BZ | ICE2QR0680Z | ICE5WR0680AG | ICE5AR0680AG |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | PG-DSO-8 | PG-DSO-8 | PG-DSO-8 | PG-DSO-8 | PG-DSO-8 | PG-DSO-8 |
| Topology | Isolated Flyback, fixed-frequency 65kHz | Isolated Flyback, quasi-resonant | Isolated Flyback, fixed-frequency | Isolated Flyback, quasi-resonant | Isolated Flyback, fixed-frequency | Isolated Flyback, fixed-frequency 100kHz |
| Switching Frequency | 65 kHz | Variable (QR) | 65 kHz | Variable (QR) | 65 kHz | 100 kHz |
| Integrated MOSFET Vdss | 800 V | 800 V | 800 V | 800 V | 800 V | 800 V |
| Family Generation | CoolSET G5 | CoolSET G5 | CoolSET G5 | CoolSET ICE2 | CoolSET G5 | CoolSET G5 |
| OCP / OVP / OTP / OLP | Yes / Yes / Yes / Yes | Yes / Yes / Yes / Yes | Yes / Yes / Yes / Yes | Yes / Yes / Yes / Yes | Yes / Yes / Yes / Yes | Yes / Yes / Yes / Yes |
| Auto-Restart on Fault | Yes | Yes | Yes | Yes | Yes | Yes |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- 65 kHz fixed frequency with frequency jittering for simplified EMI filter design (vs ICE5QR0680AG)
- Fifth-generation CoolSET design with 800V avalanche-rugged MOSFET (vs ICE2QR0680Z)
- All-in-one PG-DSO-8 integration removes external switching transistor (vs ON Semiconductor NCP1230 (controller only))
Design Notes
The PG-DSO-8 package dissipates heat primarily through the exposed thermal pad on the bottom of the package. Solder this pad to a copper pour of at least 50 mmΒ² to keep junction temperature within safe limits. Estimated: at 5W output and 80% efficiency, the device dissipates roughly 1.2W; in enclosed adapter enclosures at 70Β°C ambient, derate by ensuring the copper pour is on top inner layer with thermal vias to a bottom heat-spreader layer. Thermal evaluation must be performed in the final enclosure.
Keep the high-current DRAIN loop (rectified mains, transformer primary, and MOSFET drain) as small as possible to minimize EMI and voltage stress. Place the VCC bypass capacitor directly between pins 1/8 (VCC) and pin 2 (GND) with traces as short as possible. Route the CS (current sense) trace away from the DRAIN switching node to prevent capacitive coupling and false OCP triggering. Use a separate ground return for the CS shunt to avoid ground-bounce interference.
Route the FB trace from the optocoupler collector to pin 3 with a minimum trace length and surround it with a grounded guard ring to reject noise pickup from the DRAIN node. Place the snubber network (RCD across the transformer primary) as close as possible to the transformer primary winding termination. Use a Y-cap between primary and secondary returns for EMI reduction and tie the Y-cap to a clean ground near the controller.
Do not exceed the 800V drain-source rating by overlooking inductive ringing at MOSFET turn-off. Verify snubber design with worst-case rectified mains (265V AC peak β 375V DC). The VCC hold-up capacitor must be sized so that VCC does not drop below the UVLO threshold during brown-out events of up to one half-cycle. Do not connect the integrated MOSFET drain to circuits other than the transformer primary; the device is not designed for direct connection to a DC bus without a transformer.
Size the transformer primary inductance and turns ratio to deliver the target output power while keeping the peak primary current below the OCP threshold specified in the datasheet. Use the design spreadsheet from the Infineon CoolSET G5 application note to compute maximum duty cycle, RMS MOSFET current, and conduction losses. Validate thermal performance under the worst-case ambient temperature in the final enclosure.
Compliance Information
RoHS and lead-free per Infineon product page. Not AEC-Q100 qualified (commercial/industrial-grade CoolSET family). Halogen-free status not explicitly stated in verified snippets.
