www.fairchildsemi.com
FSCM0765R
TM
Green Mode Fairchild Power Switch (FPS )
Features
• Internal Avalanche Rugged SenseFET
• Low Start-up Current (max 40uA)
• Low Power Consumption under 1 W at 240VAC and
0.4W Load
OUTPUT POWER TABLE
(3)
230VAC ±15%
85-265VAC
PRODUCT
Adapt-
er
Open
Frame
Adapt- Open
er
(1)
(2)
(1)
(2)
Frame
• Precise Fixed Operating Frequency (66kHz)
• Frequency Modulation for low EMI
• Pulse by Pulse Current Limiting (Adjustable)
• Over Voltage Protection (OVP)
• Over Load Protection (OLP)
• Thermal Shutdown Function (TSD)
• Auto-Restart Mode
• Under Voltage Lock Out (UVLO) with Hysteresis
• Built-in Soft Start (15ms)
FSCM0565RJ
FSCM0765RJ
FSCM0565RI
FSCM0765RI
FSCM0565RG
FSCM0765RG
50W
65W
50W
65W
70W
85W
65W
70W
65W
70W
85W
95W
40W
50W
40W
50W
60W
70W
50W
60W
50W
60W
70W
85W
Table 1. Maximum Output Power
Notes:
1. Typical continuous power in a non-ventilated enclosed
adapter measured at 50°C ambient.
2. Maximum practical continuous power in an open-frame
Application
• SMPS for VCR, SVR, STB, DVD and DVCD
• Adaptor
design at 50°C ambient.
• SMPS for LCD Monitor
3. 230 VAC or 100/115 VAC with doubler.
Related Application Notes
• AN-4137: Design Guidelines for Off-line Flyback
Converters Using Fairchild Power Switch (FPS)
• AN-4140: Transformer Design Consideration for off-line
Flyback Converters using Fairchild Power Switch
• AN-4141: Troubleshooting and Design Tips for Fairchild
Power Switch Flyback Applications
Typical Circuit
DC
OUT
• AN-4148: Audible Noise Reduction Techniques for FPS
Applications
AC
IN
Drain
Description
PWM
The FSCM0765R is an integrated Pulse Width Modulator
(PWM) and SenseFET specifically designed for high
performance offline Switch Mode Power Supplies (SMPS)
with minimal external components. This device is an
integrated high voltage power switching regulator which
combines an avalanche rugged SenseFET with a current
mode PWM control block. The PWM controller includes
integrated fixed frequency oscillator, under voltage lockout,
leading edge blanking (LEB), optimized gate driver, internal
soft start, temperature compensated precise current sources
for a loop compensation, and self protection circuitry.
Compared with a discrete MOSFET and PWM controller
solution, it can reduce total cost, component count, size, and
weight while simultaneously increasing efficiency, productivity,
and system reliability. This device is a basic platform well
suited for cost effective designs of flyback converters.
Ilimit
Vfb
Vcc GND
Figure 1. Typical Flyback Application
Rev.1.1.0
©2005 Fairchild Semiconductor Corporation