fitipower integrated technology lnc.
FP6791C
PWM Boo8s5tT
DC-DC Controller
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.
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
Applications
● LCD Panel
● Portable Equipment
Pin Assignment
TS Package (TSSOP-8)
CC
FB
CSP
VIN
1
2
3
4
8
7
6
5
RDUTY
ROSC
VSS
EXT
Ordering Information
FP6791C□□□
TR: Tape/Reel
G: Green
Package Type
TS: TSSOP-8
Figure 1. Pin Assignment of FP6791C
FP6791C-1.1-FEB-2012
1
