■ Description

The FA7610CP(N), 7612CP(N) and 7617CP(N) are bipolar ICs containing basic circuits necessary for PWM-type switching power supply control.

To minimize the number of external discrete components, the FA7610CP(N) is provided for a flyback or step-up power supply circuit, the FA7612CP(N) for a step-down power-supply circuit and FA7617CP(N) for a flyback power supply circuit.

■ Features

FA7610CP(N)

? For flyback transformer-type or step-up power-supply circuit (maximum output duty = 64 typical)

? Totem-pole predriver

? PWM-type switching power supply control

? Low-voltage operation (VCC = 3.6 to 22V)

? Latch-mode short-circuit protection function (no malfunction by noise)

? Soft-start function

? Undervoltage lockout function

? One capacitor shared for short circuit protection and for soft start to minimize the number of external discrete components

FA7612CP(N)

? For step-down power-supply circuit (maximum output duty = up to 100)

? Open collector output

? PWM-type switching power supply control

? Low-voltage operation (VCC = 3.6 to 22V)

? Latch-mode short-circuit protection function (no malfunction by noise)

? Soft-start function

? Undervoltage lockout function

? One capacitor shared for short circuit protection and for soft start to minimize the number of external discrete components

FA7617CP(N)

? For flyback transformer-type power-supply circuit (maximum output duty = 67 typical)

? Open collector output

? PWM-type switching power supply control

? Low-voltage operation (VCC = 3.6 to 22V)

? Latch-mode short-circuit protection function (no malfunction by noise)

? Soft-start function

? Undervoltage lockout function

? One capacitor shared for short circuit protection and for soft start to minimize the number of external discrete components

■ Applications

? Battery power supply for portable equipment