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FSCQ Datasheet

  • FSCQ

  • Green Mode Fairchild Power Switch (FPS)

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  • 44页

  • FAIRCHILD

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www.fairchildsemi.com
FSCQ-Series
FSCQ0565RT / FSCQ0765RT / FSCQ0965RT / FSCQ1265RT
FSCQ1465RT / FSCQ1565RT / FSCQ1565RP
Green Mode Fairchild Power Switch (FPS
TM
)
Features
鈥?Optimized for Quasi-Resonant Converter (QRC)
鈥?Advanced Burst-Mode Operation for under 1W Standby
Power Consumption
鈥?Pulse-by-Pulse Current Limit
鈥?Over Load Protection (OLP) - Auto Restart
鈥?Over Voltage Protection (OVP) - Auto Restart
鈥?Abnormal Over Current Protection (AOCP) - Latch
鈥?Internal Thermal Shutdown (TSD) - Latch
鈥?Under Voltage Lock Out (UVLO) with Hysteresis
鈥?Low Startup Current (typical : 25uA)
鈥?Internal High Voltage SenseFET
鈥?Built-in Soft Start (20ms)
鈥?Extended Quasi-Resonant Switching
230VAC
卤15%
(2)
Open Frame
(1)
70W
100 W
130 W
170 W
190 W
210 W
250 W
OUTPUT POWER TABLE
(3)
PRODUCT
FSCQ0565RT
FSCQ0765RT
FSCQ0965RT
FSCQ1265RT
FSCQ1465RT
FSCQ1565RT
FSCQ1565RP
85-265VAC
Open Frame
(1)
60 W
85 W
110 W
140 W
160 W
170 W
210 W
Table 1. Maximum Output Power
Applications
鈥?CTV
鈥?Audio Amplifier
Related Application Notes
鈥?AN4146 - Design
Guidelines
for Quasi-Resonant
Converters
Using FSCQ-Series Fairchild Power Switch.
鈥?AN4140 - Transformer Design Consideration for Off-Line
Flyback
Converters
Using
Fairchild Power Switch.
Notes:
1. Maximum practical continuous power in an open frame
design at 50掳C ambient.
2. 230 VAC or 100/115 VAC with doubler.
3. The junction
t
emperature can limit the maximum output
power.
Typical Circuit
Vo
Description
In general, a Quasi-Resonant Converter (QRC) shows lower
EMI and higher power conversion efficiency compared to
conventional hard-switched converter with a fixed switching
frequency. Therefore,
a
QRC is well suited for noise-
sensitive applications, such as color TV and audio. Each
product in the FSCQ-Series contains an integrated Pulse
Width Modulation (PWM) controller and
a SenseFET, and
is
specifically designed for quasi-resonant off-line Switch
Mode Power Supplies (SMPS) with minimal external
components. The PWM controller includes an 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, the FSCQ-
Series can reduce total cost, component count, size, and weight,
while simultaneously increasing efficiency, productivity, and
system reliability.
These devices
provide a basic platform
that is well suited for cost-effective designs of quasi-resonant
switching flyback converters.
FPS
TM
is a trademark of Fairchild Semiconductor Corporation.
漏2005 Fairchild Semiconductor Corporation
AC
IN
Drain
FSCQ-Series
PWM
Sync
V
FB
GND
Vcc
Figure 1. Typical Flyback Application
Rev.1.1.0

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