Wide-topology PWM controller for industrial power rails
The Texas Instruments TL5001CDR is a PWM controller IC supporting buck, boost, and flyback topologies, with a single transistor-driver output and positive output configuration. It switches from 20 kHz to 500 kHz and can operate at 100% duty cycle. The supply range is 3.6 V to 40 V, and the operating temperature range is -20°C to 85°C.
Control features that matter for the design
Dead-time control and frequency control are both accessible on this controller. Adjustable dead time lets you prevent cross-conduction in half-bridge or push-pull stages — a common gotcha in flyback converters where the transformer leakage inductance rings the switch node. Frequency control (via an external resistor or capacitor, per the datasheet) allows trading off inductor size against switching losses; at 500 kHz the magnetics shrink, but gate-drive losses rise. No clock-sync input means this part runs free-running — if you need synchronization to an external clock, the LM5150QURUMRQ1 offers that feature, though its duty cycle is capped at 87% and it targets automotive-grade applications.
Lifecycle and sourcing posture
The TL5001CDR carries an active lifecycle status and is ROHS3 compliant. If dual-sourcing is a priority, the UCC2806DWTR is a functional peer (boost/flyback/forward topology, dual outputs, 47 kHz typical) but note its 50% max duty cycle and 8 V minimum supply, which change the design constraints.