描述 Description

The FP6791C is a CMOS step-up switching controller which incorporates a reference voltage circuit, an oscillator, an error amplifier, a PWM controller, an under voltage lockout circuit (UVLO) and a timer latch short-circuit protection circuit. The switching frequency can be controlled by the resistor connected to the ROSC pin, and the maximum duty ratio can be controlled by the resistor connected to the RDUTY pin. In addition, the FP6791C provides adjustable short-circuit protection delay time with an external capacitor which is connected to the CSP pin. If the maximum duty condition continues due to short-circuiting, the capacitor externally connected to the CSP pin will be charged, and oscillation will stop after a specific time. This condition will be cleared by re-application of power. This controller IC allows various settings and employs a small package, which make it easy to use.

特性 Features

● Programmed Switching Frequency
● Programmed Maximum Duty Ratio
● Reference Voltage: 1.0V ± 1.5%
● UVLO (Under-Voltage Lockout) Function:
? Detection Voltage 2.2V
? Hysteresis Width 0.3V
● Timer Latch Short-Circuit Protection Circuit: Delay Time Set by an External
???Capacitor.
● Internal Soft-Start Function
● External Compensation Network
● Small Package: 8-pin TSSOP
● RoHS Compliant

應(yīng)用 Application

● LCD Panel
● Portable Equipment