STMicroelectronics PM8804 Power Switch IC

STMicroelectronics PM8804 Power Switch IC is a PWM peak current mode controller that integrates all the circuitry required to design a smart and efficient 48V converter. The internal high-voltage linear regulator with a typical 20mA output current allows the device to start up with a minimum of external components. The PM8804 controller features programmable oscillator, adjustable slope compensation, dual complementary low-side drivers with programmable dead-time, programmable soft-start, soft turn-off, and a programmable current sense blanking-time. This controller is ideal for IP phones, WLAN access points, network cameras, and telecom mid-power applications.

Features

PWM peak current mode controller
Input operating voltage up to 75V
80% maximum duty cycle with internal slope compensation
Internal pull-up resistor on CTL pin enables the optocoupler connection
Internal high-voltage start-up regulator with 20mA current capability
Programmable dead time from 10ns to 200ns between GATE1 and GATE2
Operating current consumption <1.5mA
Current sense with programmable blanking time up to 200ns
Programmable fixed frequency up to 1MHz
Soft-start up with settable time
Soft turn off (optionally disabled)

Dual low-side complementary gate drivers
Gate drivers have 1A peak capability
GATE2 optionally turned off for reduced consumption
Embedded protections:
- Severe overcurrent protection with latch after 4 events
- Delayed overload protection with automatic restart
- Feedback disconnection (OV) protection on VC
- Thermal shutdown
High-efficiency topologies:
- Flyback forward
- Flyback with synchronous rectification
- Flyback with active clamp
- Forward with active clamp