Features: · Optimized for Valley Switching (VSC)· Low EMI through Variable Frequency Control and Inherent Frequency Modulation· High-Efficiency through Minimum Voltage Switching· Narrow Frequency Variation Range over Wide Load and Input Voltage Variation· Advanced Burst-Mode Operation for Low Stan...
FSQ0365: Features: · Optimized for Valley Switching (VSC)· Low EMI through Variable Frequency Control and Inherent Frequency Modulation· High-Efficiency through Minimum Voltage Switching· Narrow Frequency Va...
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Symbol | Characteristic | Min. | Max. | Unit | |
VSTR | Vstr Pin Voltage | 500 | V | ||
VDS | Drain Pin Voltage | 650 | V | ||
VCC | Supply Voltage | 20 | V | ||
VFB | Feedback Voltage Range | -0.3 | 9.0 | V | |
VSync | Sync Pin Voltage Range | -0.3 | 9.0 | V | |
IDM | Drain Current Pulsed(6) | FSQ0365 | 12 | A | |
FSQ0265 | 8 | ||||
FSQ0165 | 4 | ||||
FSQ321/311 | 1.5 | ||||
EAS | Single Pulsed Avalanche Energy(7) | FSQ0365 | 230 | mJ | |
FSQ0265 | 140 | ||||
FSQ0165 | 50 | ||||
FSQ321/311 | 10 | ||||
PD | Total Power Dissipation | 1.5 | W | ||
TJ | Recommended Operating Junction Temperature | -40 | °C | ||
TA | Operating Ambient Temperature | -40 | 85 | °C | |
TSTG | Storage Temperature | -55 | 150 | °C | |
ESD | Human Body Model(8) | CLASS1 C | |||
Machine Model(8) | CLASS1 B |
A Valley Switching Converter FSQ-series generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for valley switching operation 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 loop compensation, and self-protection circuitry.
Compared with discrete MOSFET and PWM controller solutions, the FSQ-series reduces total cost, component count, size and weight; while simultaneously increasing efficiency, productivity, and system reliability. FSQ-series provides a basic platform that is well suited for costeffective designs of valley switching fly-back converters.