FSCQ Datasheet, PDF (1/44 Pages) Fairchild Semiconductor – Green Mode Fairchild Power Switch (FPS)

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FSCQ-Series
FSCQ0565RT / FSCQ0765RT / FSCQ0965RT / FSCQ1265RT
FSCQ1465RT / FSCQ1565RT / FSCQ1565RP
Green Mode Fairchild Power Switch (FPS^TM)
Features
• Optimized for Quasi-Resonant Converter (QRC)
• Advanced Burst-Mode Operation for under 1W Standby
Power Consumption
• Pulse-by-Pulse Current Limit
• Over Load Protection (OLP) - Auto Restart
• Over Voltage Protection (OVP) - Auto Restart
• Abnormal Over Current Protection (AOCP) - Latch
• Internal Thermal Shutdown (TSD) - Latch
• Under Voltage Lock Out (UVLO) with Hysteresis
• Low Startup Current (typical : 25uA)
• Internal High Voltage SenseFET
• Built-in Soft Start (20ms)
• Extended Quasi-Resonant Switching
Applications
• CTV
• Audio Amplifier
Related Application Notes
• AN4146 - Design Guidelines for Quasi-Resonant
Converters Using FSCQ-Series Fairchild Power Switch.
• AN4140 - Transformer Design Consideration for Off-Line
Flyback Converters Using Fairchild Power Switch.
OUTPUT POWER TABLE⁽³⁾
PRODUCT
230VAC ±15%⁽²⁾
Open Frame⁽¹⁾
85-265VAC
Open Frame⁽¹⁾
FSCQ0565RT
70W
60 W
FSCQ0765RT
100 W
85 W
FSCQ0965RT
130 W
110 W
FSCQ1265RT
170 W
140 W
FSCQ1465RT
190 W
160 W
FSCQ1565RT
210 W
170 W
FSCQ1565RP
250 W
210 W
Table 1. Maximum Output Power
Notes:
1. Maximum practical continuous power in an open frame
design at 50°C ambient.
2. 230 VAC or 100/115 VAC with doubler.
3. The junction temperature can limit the maximum output
power.
Typical Circuit
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.
Vo
AC
IN
FSCQ-Series
PWM
Sync
V_{FB Vcc}
Drain
GND
Figure 1. Typical Flyback Application
FPS^TM is a trademark of Fairchild Semiconductor Corporation.
©2005 Fairchild Semiconductor Corporation
Rev.1.1.0