Half-bridge gate driver for N-channel MOSFETs
The Texas Instruments LM5100AMR/NOPB is a half-bridge gate driver designed to drive two N-channel MOSFETs in a half-bridge or full-bridge topology. It delivers 3A peak source and 3A peak sink current to the gate, with independent high-side and low-side channels. The bootstrap supply supports a high-side voltage up to 118 V, making it suitable for motor drives, DC-DC converters, and inverter stages where the floating high-side rail must ride above a switching node. The part operates from a 9V to 14V supply and is specified over the -40°C to 125°C junction temperature range.
Rise and fall times — what they mean for switching
Typical rise time is 430 ns and fall time is 260 ns.
Package and thermal management
The LM5100AMR/NOPB comes in an 8-PowerSOIC package with an exposed PowerPad. The PowerPad must be soldered to a copper area on the PCB to carry heat away from the die.
Supply and logic interface
The supply range is 9V to 14V, which is typical for a gate-drive bias rail derived from a 12V bus. The logic input threshold is specified with VIL at 2.3V minimum; The input is non-inverting, meaning a logic high on the input turns on the corresponding output. The two channels are independent, so you can drive the high-side and low-side MOSFETs with separate PWM signals as long as dead-time is handled externally.