The LM5045MH/NOPB is a Pulse Width Modulated (PWM) Controller contains all of the features necessary to implement full-bridge topology power converters using either current-mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100V. This highly integrated controller-driver provides dual 2A high-side and low-side gate drivers for the four external bridge MOSFETs plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up of the synchronous rectifiers allows monotonic turn-on of the power converter even with pre-bias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start and a 2MHz capable oscillator.
- Highest integration controller for small form
- Factor, high-density power converters
- High-voltage start-up regulator
- Intelligent sync rectifier start-up allows linear
- Turn-on into pre-biased loads
- Synchronous rectifiers disabled in UVLO mode and hiccup mode
- Two independent, programmable synchronous rectifiers
- Dead-time adjustments
- Four high-current 2A Bridge gate drivers
- Wide-bandwidth optocoupler interface
- Dual-mode overcurrent protection
- Programmable line UVLO and OVP
- Green product and no Sb/Br
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