ICE3AS03LJGXUMA1 - 100kHz CoolSET Flyback PWM Controller | Infineon
MPN: ICE3AS03LJGXUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.34 | $134.00 |
| 500 | $1.12 | $560.00 |
| 1,000 | $0.96 | $960.00 |
Drop-in alternatives for ICE3AS03LJGXUMA1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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ICE3AS03LJGXUMA1 Maximum Ratings & Electrical Characteristics
| Topology | Flyback (isolated AC/DC) |
| Control Mode | Current-mode PWM, fixed frequency |
| Switching Frequency | 100 kHz (typical) |
| Integrated Startup Cell | 500 V (withstand) |
| VCC Supply Voltage | 10.5 V to 25 V |
| Maximum Power Range | Up to 300 W |
| Standby Power | < 100 mW |
| Burst Mode | Active burst mode |
| Package | PG-DSO-8 |
| Pin Count | 8 |
| Mounting Type | Surface Mount |
| Protection Features | OCP, OLP, OVP, UVLO, auto-restart |
| Soft-Start | Integrated |
| Frequency Jitter | Yes (for low EMI) |
| RoHS Status | Compliant |
ICE3AS03LJGXUMA1 Pin Configuration
| Pin 1 | GND β Ground reference |
| Pin 2 | VCC β Supply voltage (10.5 V to 25 V) |
| Pin 3 | FB β Feedback input for output voltage regulation |
| Pin 4 | CS β Current sense input for peak current control |
| Pin 5 | HV β High-voltage startup cell connection |
| Pin 6 | DRAIN β Internal MOSFET drain |
| Pin 7 | NC β Not connected (per datasheet) |
| Pin 8 | SOURCE β Internal MOSFET source |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ICE3AS03LJGXUMA1 is suitable for 6 applications: AC/DC Wall Adapters (5-27 W), Set-Top Box Auxiliary Power Supply, LCD TV Standby / Auxiliary Rail, White Goods Auxiliary Power, Industrial Auxiliary / Sensor Supply, LED Lighting Driver Auxiliary Supply.
AC/DC Wall Adapters (5-27 W)
The ICE3AS03LJGXUMA1 is purpose-built for low-power AC/DC adapters including mobile phone chargers and USB-PD supplies in the 5 W to 27 W range. Its integrated 500 V startup cell eliminates the bulky external startup resistor string, while active burst mode holds no-load consumption below 100 mW to satisfy Energy Star and EU CoC Tier 2 limits. The 100 kHz fixed frequency allows compact transformer sizing, and the built-in OCP/OVP/auto-restart protections simplify IEC 62368-1 compliance.
Recommended
Set-Top Box Auxiliary Power Supply
Set-top boxes require always-on 5 V/12 V standby rails for the network interface and remote-control receiver. The ICE3AS03LJGXUMA1's <100 mW standby power keeps the wall-plug loss well below regulatory limits even when the main STB is in deep standby. The current-mode control provides clean transient response when the STB wakes up and the HDD spins up, while the 100 kHz frequency stays above the AM broadcast band for clean EMI.
Recommended
LCD TV Standby / Auxiliary Rail
LCD TVs need a continuous standby supply to detect the IR remote control wake signal. The ICE3AS03LJGXUMA1 delivers a tightly regulated 5 V standby rail from the rectified mains with standby power under 100 mW. Frequency jittering on the 100 kHz oscillator spreads the EMI spectrum, easing compliance with EN 55022 Class B without complex snubber networks. The PG-DSO-8 thermal pad provides adequate heat dissipation for the 5-10 W typical standby converter.
Recommended
White Goods Auxiliary Power
Washing machines, dishwashers, and refrigerators need a small isolated supply for the microcontroller and user interface. The ICE3AS03LJGXUMA1's wide VCC range (10.5 V to 25 V) tolerates rectified 24 V or rectified mains-derived rails used in these appliances. Integrated protections prevent damage from motor-induced brown-outs and inductive load transients, and the auto-restart scheme simplifies IEC 60335-1 household appliance safety compliance.
Recommended
Industrial Auxiliary / Sensor Supply
Industrial PLCs and sensor hubs need isolated 24 V to 5 V/3.3 V rails for analog front-ends. The ICE3AS03LJGXUMA1's 500 V startup cell withstands the voltage transients common on industrial mains, and the current-mode control rejects input voltage variation that occurs with heavy motor switching. Soft-start limits inrush, protecting downstream sensors during power-up sequencing in the cabinet.
Recommended
LED Lighting Driver Auxiliary Supply
Smart LED drivers need an always-on auxiliary supply to power the wireless module and dimming interface even when the LEDs are off. The ICE3AS03LJGXUMA1's sub-100 mW standby power keeps the auxiliary loss negligible, while the 100 kHz switching frequency is far above the audible band so the driver remains silent during standby. The PG-DSO-8 footprint fits easily inside the LED driver housing alongside the main PFC + LLC stages.
Recommended
Recommended Products Summary
Engineering reference data for ICE3AS03LJGXUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ICE3AR1080JGXUMA1 | ICE3AS02LJGXUMA1 | ICE3BR1765JGXUMA1 | ICE2AS01G | ICE2PCS04GXUMA1 |
|---|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | PG-DSO-8 | PG-DSO-8 - same | PG-DSO-8 - same | PG-DSO-8 - same | PG-DSO-8 - same | PG-DSO-8 - same |
| Switching Frequency | 100 kHz | 100 kHz | 100 kHz | 65 kHz | 67 kHz | [DATA_NEEDED] |
| Integrated MOSFET Voltage | 500 V (startup cell) | 800 V | 500 V | 650 V | 500 V | [DATA_NEEDED] |
| Standby Power | < 100 mW | < 100 mW | < 100 mW | < 100 mW | approx 200 mW | [DATA_NEEDED] |
| Topology | Flyback | Flyback | Flyback | Flyback | Flyback | PFC (different function) |
| Burst Mode | Active burst mode | Active burst mode | Active burst mode | Active burst mode | Burst mode | N/A |
| Maximum Power | 300 W | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Automotive Qualified | No | No | No | No | No | No |
Key Differentiators
- Integrated 500 V startup cell eliminates external startup resistor chain (vs ICE2AS01G)
- 100 kHz fixed frequency with internal trimming (no external RC) (vs ICE2AS01G)
- Lower standby power with active burst mode (vs ICE2AS01G)
Design Notes
The ICE3AS03LJGXUMA1's PG-DSO-8 package dissipates power primarily through the exposed thermal pad (pin-down) and the SOURCE pin. At a 10 W converter output, internal losses are typically 0.5-1.0 W, requiring at least 50 mm^2 of copper pour on the SOURCE pad and bottom-layer thermal land to keep junction temperature below 110 C. Estimated: with theta_JA of ~80 C/W on a 1 oz copper 1 sq inch pour, a 0.8 W dissipation yields a 64 C junction temperature rise above ambient.
Place the VCC hold-up capacitor (typically 47 uF to 100 uF) as close to the VCC and GND pins as possible to provide ride-through energy during the half-wave rectified mains dip that occurs on every AC cycle. The HV startup pin should have a minimal trace length to the rectified mains bulk capacitor to limit radiated EMI from the high dv/dt switching node. Keep the CS (current sense) trace short and away from the DRAIN switching node to avoid false triggering.
Do not exceed VCC of 25 V β the internal clamp will activate, dissipating power and potentially triggering OVP. Ensure the transformer primary inductance provides a volt-second product that keeps DCM/CCM boundary operation within the datasheet's specified duty cycle limit (typically <50%). The feedback optocoupler must have CTR (current transfer ratio) of 50-200% to maintain loop bandwidth across temperature β using a low-CTR optocoupler causes output voltage sag at cold temperatures.
Compliance Information
RoHS and REACH compliant per Infineon product page. Not AEC-Q100 qualified; choose automotive-qualified CoolSET variants for vehicle applications. Halogen-free status not explicitly stated in the provided data.
