KA5M0765RQC Datasheet, PDF (1/12 Pages) Fairchild Semiconductor – Fairchild Power Switch(SPS)

KA5M0765RQC
Fairchild Power Switch(FPS)
www.fairchildsemi.com
Features
• Precision Fixed Operating Frequency (70kHz)
• Low Start-up Current (Typ. 100µA)
• Pulse by Pulse Current Limiting
• Over Load Protection
• Over Current Protection
• Over Voltage Protection (Min. 25V)
• Internal Thermal Shutdown Function
• Under Voltage Lockout
• Internal High Voltage Sense FET
• Auto-Restart Mode
Description
The Fairchild Power Switch(FPS) product family is specially
designed for an off line SMPS with minimal external
components. The Fairchild Power Switch(FPS) consist of high
voltage power SenseFET and current mode PWM IC. Included
PWM controller features integrated fixed frequency oscillator,
under voltage lock-out, leading edge blanking, optimized gate
turn-on/turn-off driver, thermal shutdown protection, over
voltage protection, and temperature compensated precision
current sources for loop compensation and fault protection
circuitry. compared to discrete MOSFET and PWM controller
or RCC solution, a Fairchild Power Switch(FPS) can reduce
total component count, design size, weight and at the same time
increase efficiency, productivity, and system reliability.
It has a basic platform well suited for cost-effective design in
either a flyback converter or a forward converter.
TO-220-5L
1
1. DRAIN 2. GND 3. VCC 4. FB 5. S/S
Internal Block Diagram
Vcc
Drain
3
1
OVP
+
OVP - ou t
27V _-
VCC VREF 15V/9V
5uA 1mA
Feedback 4
Soft Start ⁵
2.5R
+
5V
R
7.5V
- _OLP
TSD
( TJ =1 50℃)
OVP - ou t
(VC C = 2 7V)
OCL
(VS=1.4V)
UVLO
Vref
CLK
OSC
INTERNAL
BIA S
Good Logic
SQ
-
LEB R
+
VO F F SE T
VOLTAG E
LIMIT
Sense
CIRCUIT _FET
14V
VS
Power-on Reset
/Auto-restart
S
Q
R
Shutdown
Lat ch
Rsense
2 GND
※ LEB : Leading Edge Blanking
※ OCL : Over Curr ent Limit
©2004 Fairchild Semiconductor Corporation
Rev.1.0.5