FSCQ0765RTYDTU ,7A/650V QRC Power SwitchFeaturesOUTPUT POWER TABLE• Optimized for Quasi-Resonant Converter (QRC)(2)230VAC ±15% 85-265VAC• A ..
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FSCQ0765RTYDTU ,7A/650V QRC Power SwitchBlock DiagramSync Vcc Drain5 3 1+Quasi-resonant+(QR) switchingfsThreshold -controller- 9V/15VSoft s ..
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FSCQ1265RT ,12A/650V QRC Power SwitchBlock DiagramSync Vcc Drain5 3 1+Quasi-resonant+(QR) switchingfsThreshold -controller-9V/15VSoft st ..
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FSCQ0765RT-FSCQ0765RTYDTU
7A/650V QRC Power Switch
Features Optimized for Quasi-Resonant Converter (QRC) Advanced Burst-Mode operation for under 1 W standby
power consumption Pulse by Pulse Current Limit (5A) Over load protection (OLP) - Auto restart Over voltage protection (OVP) - Auto restart Abnormal Over Current Protection (AOCP) - Latch Internal Thermal Shutdown (TSD) - Latch Under V oltage Lock Out (UVLO) with hysteresis Low Startup Current (typical : 25uA) Low Operating Current (typical : 4mA) Internal High Voltage SenseFET Built-in Soft Start (20ms) Extended Quasi-resonant Switching for Wide Load Range
Application•CTV DVD Receiver Audio Power Supply
DescriptionIn general, Quasi-Resonant Converter (QRC) shows lower
EMI and higher power conversion efficiency compared to the
conventional hard switched converter with a fixed switching
frequency. Therefore, it is well suited for applications that are
sensitive to the noise, such as color TV and audio. The
FSCQ0765RT is an integrated Pulse Width Modulation
(PWM) controller and Sense FET specifically designed for
Quasi-resonant off-line Switch Mode Power Supplies
(SMPS) with minimal external components. 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, produc-
tivity, and system reliability. This device is a basic platform
well suited for cost effective designs of Quasi resonant
switching flyback converters.
Table 1. Notes: 1. Maximum practical continuous power
in an open frame design at 50°C ambient. 2. 230 VAC or 100/115 VAC with doubler.
Typical Circuit
Figure 1. Typical Flyback Application
