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Fairchild Semiconductor Electronic Components Datasheet

CM0765R Datasheet

Green Mode Fairchild Power Switch

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www.fairchildsemi.com
FSCM0765R
Green Mode Fairchild Power Switch (FPSTM)
Features
• Internal Avalanche Rugged Sense FET
• Low startup current (max 40uA)
• Low power consumption under 1 W at 240VAC & 0.4W
load
• 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)
Application
• SMPS for VCR, SVR, STB, DVD & DVCD
• Adaptor
• SMPS for LCD Monitor
Description
The FSCM0765R is an integrated Pulse Width Modulator
(PWM) and Sense FET 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
combine an avalanche rugged Sense FET 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 discrete MOSFET and PWM controller
solution, it can reduce total cost, component count, size and
weight simultaneously increasing efficiency, productivity, and
system reliability. This device is a basic platform well suited
for cost effective designs of flyback converters.
Table 1. Maximum Output Power
OUTPUT POWER TABLE
PRODUCT
230VAC ±15%(3)
Adapt- Open
er(1) Frame(2)
85-265VAC
Adapt- Open
er(1) Frame(2)
FSCM0565RD 50W
65W
40W
50W
FSCM0765RD 65W
70W
50W
60W
FSCM0565RC 70W
85W
60W
70W
FSCM0765RC 85W
95W
70W
85W
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
design at 50°C ambient.
3. 230 VAC or 100/115 VAC with doubler.
Typical Circuit
AC
IN Drain
PWM
Ilimit
Vfb Vcc GND
DC
OUT
Figure 1. Typical Flyback Application
©2004 Fairchild Semiconductor Corporation
Rev.1.0.0
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Fairchild Semiconductor Electronic Components Datasheet

CM0765R Datasheet

Green Mode Fairchild Power Switch

No Preview Available !

FSCM0765R
Internal Block Diagram
Vcc
3
0.3/0.5V +
-
Vcc Vcc
FB 4
Idelay
IFB
2.5R
Ilimit 5
0.3K
Soft start
8V/12V
PWM
R
Vcc good
Freq.
Modulation
OSC
SQ
RQ
Vref
LEB
Internal
Bias
Gate
driver
Drain
1
VSD
Vcc
Vovp
TSD
Vcc UV reset
Vcc good
SQ
RQ
2 GND
Figure 2. Functional Block Diagram of FSCM0765R
2
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Part Number CM0765R
Description Green Mode Fairchild Power Switch
Maker Fairchild Semiconductor
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CM0765R Datasheet PDF






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