The LM5046MH is a Pulse Width Modulated (PWM) Controller contains all of the features necessary to implement a phase-shifted full-bridge topology power converter 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- 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 dead-time to enable zero-volt switching of the primary FETs. Intelligent startup 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 with synchronization capability and thermal shutdown.
- 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 dead-time
- Adjustments to enable zero-volt switching
- Four high-current 2A Bridge gate drivers
- Wide-bandwidth opto-coupler interface
- Dual-mode overcurrent protection
- Programmable line UVLO and OVP
- Green product and no Sb/Br
电源管理, 消费电子产品, 国防, 军用与航空, 通信与网络, 车用
(EN)
