L6743D is a high-frequency dual MOSFET driver specifically designed to drive N-channel MOSFETs connected in synchronous-rectified buck topology.
The L6743D is a flexible, high-frequency dual-driver specifically designed to drive N-channel MOSFETs connected in a synchronous-rectified buck topology. It embeds high-current drivers for both high-side and low-side MOSFETs and accepts a flexible power supply between 5 V and 12 V to optimize gate-drive voltage. The device includes an integrated bootstrap diode to save external components and features anti-shoot-through management combined with adaptive dead-time control to minimize low-side body diode conduction time.
| Supply voltage range | 5 V to 12 V |
|---|---|
| Package type | SO8 |
| Maximum junction temperature | 150 °C |
| Pre-OV threshold | 1.8 V |
It supplies the high-side driver, saving the use of an external component.
It keeps all MOSFETs OFF if the EN signal is pulled low or if the PWM signal remains in the HiZ window for longer than the hold-off time.
It protects the load by latching the low-side MOSFET ON if the PHASE pin voltage overcomes about 1.8 V during the HiZ state.