Wide-input half-bridge controller with clock sync
The LM5035BMH/NOPB is a PWM controller built for half-bridge topologies, handling step-up/step-down conversion from a 13 V to 105 V supply rail — wide enough to run directly off a 48 V telecom bus or a rectified 120 VAC line without an intermediate regulator. Switching frequency is programmable from 200 kHz to 500 kHz, and the clock sync input lets you align multiple converters to a common frequency — useful for beating beat-frequency noise in multi-rail supplies. The single transistor-driver output drives external MOSFETs, so the power stage is sized to your load; the controller itself handles the control loop, soft-start, and fault logic.
Synchronous rectification and thermal range
Integrated synchronous rectifier drive lets you replace the output diode with a low-Rds(on) FET — the efficiency gain matters most in high-current outputs where the diode forward drop would dominate losses. Control features include frequency control, ramp compensation, and soft-start — the ramp pin sets the slope compensation for current-mode control, and soft-start prevents output overshoot at power-up.