STMicroelectronics Dual PWM Controller Voltage Mode 500kHz

This regulating pulse width modulator IC is designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip 5.1V reference is trimmed to ±1% and the input common-mode range of the error amplifier includes the reference voltage, eliminating the need for external resistors.

A single resistor between the CT and the discharge terminals provides a wide range of dead time adjustment. This device also features built-in soft-start circuitry, requiring only an external timing capacitor. A shutdown terminal controls both the soft-start circuitry and the output stages, providing instantaneous turn OFF through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands.

Key Features

• Separate oscillator sync terminal
• Adjustable dead-time control
• Internal soft-start
• Pulse-by-pulse shutdown
• Input undervoltage lockout with hysteresis
• Latching PWM to prevent multiple pulses
• Dual source/sink output drivers
• Output voltage range 5V to 5.2V at Tj = 25°C

Designed for through-hole mounting in a 16-pin PDIP package, this dual-channel voltage mode controller supports push-pull topology and operates within an ambient temperature range of 0°C to 70°C. With a supply voltage range of 8V to 35V and a maximum switching frequency of 500kHz, it delivers reliable performance for sophisticated power supply designs.