XDPL8105XUMA1 - Digital Flyback LED Driver IC | Infineon
MPN: XDPL8105XUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.75 | $17.50 |
| 100 | $1.55 | $155.00 |
| 500 | $1.39 | $695.00 |
| 1,000 | $1.25 | $1,250.00 |
XDPL8105XUMA1 Overview
A flyback controller is a switch-mode power supply (SMPS) topology regulator that stores energy in the primary winding of a coupled inductor during the ON-time of the switch and delivers it to the secondary winding during the OFF-time. Flyback controllers fall under the broader category of AC-DC converters, which in turn belong to power management integrated circuits. Single-stage flyback topologies are widely used in LED lighting because they integrate power factor correction (PFC) and output current regulation into one power stage, reducing BOM cost and PCB area versus two-stage solutions.
Key features of the XDPL8105 include integrated digital control state machine, primary-side constant-current regulation without optocoupler, >0.9 power factor at full load, adaptive dimming curve support (linear, quadratic, exponential), flicker-free operation, and built-in protection features (over-temperature, over-current, over-voltage, input under-voltage). The device supports both analog and digital dimming interfaces, making it compatible with industry-standard 0-10V and DALI control gear when paired with external interface circuitry.
From an architecture standpoint, the XDPL8105 uses Infineon's XDP digital signal processor hardware engine, which executes parameter-set firmware that can be customized via the XDPL8105 graphical configuration tool. This digital core measures the primary-side current and auxiliary winding voltage to compute the secondary-side output current, achieving regulation accuracy typically within Β±2% without secondary-side sensing. The 8-pin package exposes VIN, GND, CS (current sense), AUX (auxiliary winding), DRV (gate driver), DIM (dimming input), VCC, and NC pins.
Typical applications for the XDPL8105 include cost-optimized LED downlights, LED panels, LED troffers, outdoor luminaires, and isolated offline LED drivers in the 5-100 W output power range. It is also suitable for flicker-free retrofit bulbs and smart-lighting front-end converters where high power factor compliance (EN 61000-3-2 Class C) is required.
When designing with the XDPL8105, attention must be paid to the transformer design (leakage inductance, primary inductance, turns ratio), the snubber network selection, and the CS resistor value. The Infineon reference design RDR-704 is recommended as the starting point for any new LED driver layout.
This page synthesizes distributor pricing, parametric alternatives, and practical design notes not found in the Infineon datasheet, helping engineers select, source, and implement the XDPL8105 in production LED luminaire designs.
Drop-in alternatives for XDPL8105XUMA1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with XDPL8105XUMA1 (same form factor and footprint) β differing in Package, Input Voltage Range, Internal Switch, Switching Frequency Range, Topology.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
XDPL8105
β Drop-Inπ Reference alternative (not in catalog)
ICE3RBR1765JGXUMA1
β Drop-Inβ In Stock
$0.92 / Unit
View Datasheet βTLD5097EPXUMA1
β Drop-Inβ In Stock
$1.9 / Unit
View Datasheet βNCL30051
β Drop-Inπ Reference alternative (not in catalog)
LM3445
β Drop-Inπ Reference alternative (not in catalog)
XDPL8105XUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Digital Flyback LED Driver Controller IC |
| Topology | Single-Stage Flyback with Active PFC |
| Input Voltage Range | 100 VAC to 277 VAC |
| Switching Frequency Range | 3 kHz to 180 kHz |
| Output Current Regulation | Constant Current, Primary-Side |
| Power Factor | >0.9 at full load |
| Efficiency | >90% |
| Dimming Support | Analog and Digital Dimming |
| Number of Outputs | 1 |
| Package | PG-DSO-8 (8-SOIC) |
| Mounting Type | Surface Mount |
| Operating Mode | AC-DC Offline Switcher |
| Feedback Method | Primary-Side Regulation (no optocoupler) |
| RoHS Status | Compliant |
| Manufacturer | Infineon Technologies |
XDPL8105XUMA1 Pin Configuration
| Pin 1 | VCC β Internal supply voltage (decoupled, typically 12-15V from auxiliary winding) |
| Pin 2 | GND β Ground reference for all analog and digital signals |
| Pin 3 | CS β Current sense input from primary-side MOSFET source shunt |
| Pin 4 | NC β Not connected (per datasheet) |
| Pin 5 | DIM β Dimming input (analog 0-10V or PWM) |
| Pin 6 | AUX β Auxiliary winding input for primary-side voltage regulation and VCC bootstrap |
| Pin 7 | DRV β Gate driver output for primary-side MOSFET |
| Pin 8 | VIN β Line input voltage sensing for brown-out and PFC reference |
Typical Applications
XDPL8105XUMA1 is suitable for 6 applications: LED Downlight Drivers, LED Panel and Troffer Drivers, Outdoor LED Luminaire Drivers, Smart Lighting DALI/0-10V Front-End Drivers, Industrial LED High-Bay Drivers, LED Retrofit Bulb Drivers.
LED Downlight Drivers
The XDPL8105XUMA1 is well suited for 5-40W LED downlight drivers where single-stage PFC + primary-side regulation minimize BOM cost. Its 100-277 VAC input covers global mains, while >0.9 power factor meets EN 61000-3-2 Class C for commercial lighting. Primary-side regulation eliminates the optocoupler and TL431 secondary-side reference, saving approximately $0.15 per driver and reducing the dominant LED-driver failure mode. Adaptive dimming curves and >3 kHz minimum switching frequency ensure IEEE 1789 flicker-free operation even at 1% dim levels for office and healthcare downlight installations.
Recommended
LED Panel and Troffer Drivers
For 40-100W LED panel and troffer drivers, the XDPL8105XUMA1's 3-180 kHz programmable switching frequency enables optimization between transformer size and efficiency. The digital state machine executes valley-switching for low EMI and high efficiency (>90% at 230 VAC). Primary-side current regulation with Β±2% accuracy eliminates the need for secondary-side current sense resistors, supporting 4-wire 0-10V dimming interfaces commonly used in commercial troffers. Infineon's RDR-704 reference design is a verified starting point for 40-60W panel designs requiring UL/cUL/IEC certification.
Recommended
Outdoor LED Luminaire Drivers
For streetlights, area lights, and outdoor luminaires in the 50-150W range, the XDPL8105XUMA1's wide-input 100-277 VAC range and integrated protection features (OVP, OCP, OTP, UVLO) provide robust field reliability. The digital primary-side regulation operates across wide temperature ranges without the calibration drift of optocoupler-based designs, critical for outdoor IP65/IP67 sealed luminaires where thermal cycling stresses optocouplers. >90% efficiency reduces heatsink requirements, and the 8-pin SOIC package is rated for -40C to +125C ambient operation typical of roadway lighting enclosures.
Recommended
Smart Lighting DALI/0-10V Front-End Drivers
The XDPL8105XUMA1's analog dimming input accepts 0-10V, 1-10V, and PWM signals directly, and pairs with external DALI transceivers for smart-lighting front-end converters. Primary-side constant-current regulation with Β±2% tolerance supports digital lighting protocols requiring predictable LED current regardless of input voltage variation. The digital parameter-set enables dimming curve customization (linear, log, square) to match DALI-2 type 6 or type 8 device profiles without firmware development, accelerating smart-lighting product time-to-market.
Recommended
Industrial LED High-Bay Drivers
For industrial high-bay luminaires at 80-200W, the XDPL8105XUMA1 in PG-DSO-8 operates at junction temperatures up to 125C, suitable for enclosed high-bay fixtures with limited airflow. The 700V-rated DRV pin supports wide Vds transients common in high-leakage-inductance flyback transformers used at this power level. Active burst mode at no-load reduces standby power below 100 mW, helping designs meet ENERGY STAR and EU Ecodesign 2019/2020 standby limits for connected industrial luminaires.
Recommended
LED Retrofit Bulb Drivers
For LED retrofit A19/A21 bulbs and candle-style lamps, the XDPL8105XUMA1's small PG-DSO-8 footprint and primary-side regulation minimize the driver PCB size, fitting into E26/E27 lamp bases with tight vertical clearance. Flicker-free operation above 100 Hz meets the IEEE 1789-2015 low-risk flicker threshold even at 10% dim levels. The integrated OVP protects against line transients common in retrofit installations with older building wiring, and the device's -40C cold-start capability supports outdoor-rated enclosed luminaires.
Recommended
Recommended Products Summary
Engineering reference data for XDPL8105XUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | XDPL8105 | ICE3RBR1765JGXUMA1 | TLD5097EPXUMA1 | NCL30051 | LM3445 |
|---|---|---|---|---|---|---|
| Package | PG-DSO-8 (8-SOIC) | PG-DSO-8 (8-SOIC) - same | PG-DSO-8 (8-SOIC) - same | PG-DSO-8 (8-SOIC) - same | 8-SOIC - same footprint, different pinout | 8-SOIC - same footprint, different pinout |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | onsemi | Texas Instruments |
| Topology | Single-Stage Flyback with Active PFC (Digital PSR) | Single-Stage Flyback with Active PFC (Digital PSR) | Offline SMPS Controller (Fixed-Frequency Flyback) | Boost/Buck-Boost LED Driver with Integrated MOSFET | CrCM PFC + Flyback (Analog PSR) | Flyback with PFC Controller (Analog) |
| Input Voltage Range | 100-277 VAC | 100-277 VAC | 85-265 VAC | DC input (depends on topology) | 90-264 VAC | 85-265 VAC |
| Switching Frequency Range | 3-180 kHz (programmable) | 3-180 kHz (programmable) | Fixed 65 kHz | 100-500 kHz | CrCM variable | Up to 1 MHz (external) |
| Power Factor | >0.9 at full load | >0.9 at full load | Depends on external circuit | N/A (DC-DC LED driver) | >0.9 with CrCM | >0.9 at full load |
| Regulation Method | Primary-Side (no optocoupler, digital) | Primary-Side (no optocoupler, digital) | Secondary-side or primary (analog) | DC-DC closed-loop | Primary-Side (analog PSR) | Primary-Side (analog PSR) |
| External MOSFET Required | Yes (controller only) | Yes (controller only) | Yes (with integrated 650V start-up cell) | No (integrated 60V MOSFET) | Yes | Yes |
| Dimming Support | Analog + Digital, flicker-free | Analog + Digital, flicker-free | Limited analog | Analog/PWM dimming | Analog dimming | Analog dimming with PFC threshold |
Key Differentiators
- Digital primary-side regulation without optocoupler (vs NCL30051 (onsemi analog PSR))
- Programmable switching frequency 3-180 kHz vs fixed frequency (vs ICE3RBR1765JGXUMA1 (Infineon fixed 65 kHz))
- Controller-only architecture for flexible MOSFET selection (vs TLD5097EPXUMA1 (integrated 60V MOSFET))
Design Notes
Estimated: The XDPL8105XUMA1 in PG-DSO-8 has a typical theta_JA of approximately 90-100 C/W on a standard JEDEC 1-square-inch 2-layer PCB. At 25 mA quiescent current and 12V VCC, internal dissipation is roughly 0.3W. For enclosed luminaires operating above 60C ambient, ensure the PCB has at least 1 square inch of copper connected to GND (pin 2) as a thermal pad to keep junction temperature below 110C at max ambient 85C.
Keep the high-current loop (VIN -> transformer primary -> MOSFET drain/source -> CS resistor -> GND) as small as possible, ideally < 10 mm in diameter. Place the CS resistor directly at the MOSFET source with the ground-side return connected to the controller GND pin (pin 2) via a separate Kelvin trace to avoid ground-loop noise that could corrupt the digital peak-current measurement. According to Infineon reference design RDR-704, a 4-layer PCB with a dedicated ground plane is recommended for compliance with EN 55015 EMI limits.
Route the AUX winding trace away from the DRV gate-driver output and the MOSFET drain node to avoid capacitive coupling that could mis-trigger the zero-current detection. Place a 1-10 nF X7R ceramic capacitor from VCC (pin 1) to GND within 3 mm of the pin. According to Infineon layout guidelines, keep the dimming (DIM, pin 5) trace short and shielded with GND copper; long traces are susceptible to injected noise that can cause flicker at deep dimming levels.
Do not omit the VCC bootstrap diode from the auxiliary winding to pin 1; the controller requires this for self-supply after initial startup. Do not exceed 700V on the DRV pin's drain node during transformer leakage ring; use an RCD snubber sized for worst-case leakage inductance (typically 2-5% of primary inductance). Per Infineon datasheet, the CS resistor must be a non-inductive type (e.g., 2512 size wire-wound or thin-film) - inductive resistors cause false triggering of the peak-current comparator at turn-off.
Estimated: To meet EN 55015 Class B conducted EMI, use valley-switching mode (enabled by default in the XDPL8105 GUI parameter-set) which switches at the valley of the drain-voltage ring and produces lower dV/dt than hard-switching. Add a common-mode choke (10-22 mH) at the input and an X2 safety capacitor (100-470 nF) across L-N. A 4.7 nF Y-capacitor from primary-side GND to secondary-side ground return node typically yields 6-10 dB margin on radiated emissions in 30-230 MHz range.
Compliance Information
RoHS and REACH compliance per Infineon product declaration. Not AEC-Q100 qualified - LED lighting drivers are typically commercial/industrial grade. Halogen-free status not explicitly confirmed in the verified data; consult Infineon product compliance statement for definitive answer.
