950V avalanche-rated CoolSET™ — 30 W flyback or buck
The ICE5BR3995BZXKLA1 is an Infineon CoolSET™ Gen5 integrated PWM controller with a 950 V avalanche-rated MOSFET, switching at 65 kHz and rated for 30 W output in non-isolated flyback or buck topologies. The 950 V breakdown voltage gives headroom for universal AC input (85–265 VAC) designs where reflected voltage and leakage inductance spikes can push the drain above 800 V — the 150 V margin keeps the MOSFET inside its safe operating area without an external clamping snubber in many cases.
Fault protection suite — what each guard does
The ICE5BR3995BZXKLA1 integrates current limiting, over-load, over-temperature, over-voltage, and short-circuit protection — five independent fault monitors that shut down the gate drive without external comparators or supervisor ICs. Over-temperature protection uses a junction-temperature sensor with a 150°C typical threshold — the 150°C TJ max rating means the die can reach the trip point and still have margin before the absolute maximum is violated, allowing auto-recovery hysteretic behaviour. Over-voltage protection on the Vcc pin (10 V to 27 V supply range) latches the controller off if the auxiliary winding voltage rises above the internal OVP threshold — useful in multi-output flybacks where a failed feedback loop can drive the output and bias rail high.
PG-DIP-7 — through-hole board-fit and thermal path
Housed in a 7-lead PG-DIP-7 package (8-DIP footprint with one pin omitted), the through-hole mount allows manual assembly and rework — no hot-air profile or BGA reball station needed.
Soft start and 16 V startup — first-power behaviour
The internal soft-start ramps the duty cycle from zero to the steady-state value over a fixed period — this limits inrush current into the output capacitor during first power-up and prevents the transformer from saturating on the first few cycles. A 16 V startup threshold means the Vcc capacitor must charge to 16 V before the controller begins switching — once running, the Vcc operating range is 10 V to 27 V, so the auxiliary winding voltage can drop as low as 10 V without triggering an under-voltage lockout.