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 Standby P...
FSQ0165: Features: ·Optimized for Valley Switching (VSC)·Low EMI through Variable Frequency Control and Inherent Frequency Modulation·High-Efficiency through Minimum Voltage Switching·Narrow Frequency Variat...
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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 |
A | |||
FSQ0165 |
4 |
A | |||
FSQ321/311 |
1.5 |
A | |||
EAS
|
Single Pulsed Avalanche Energy(7) | FSQ0365 |
230 |
mJ | |
FSQ0265 |
140 |
mJ | |||
FSQ0165 |
50 |
mJ | |||
FSQ321/311 |
10 |
mJ | |||
PD |
Total Power Dissipation |
1.5 |
W | ||
TJ |
Recommended Operating Junction Temperature |
-40 |
Internally limited |
°C | |
TA |
Operating Ambient Temperature |
-40 |
85 |
°C | |
TSTG |
Storage Temperature |
-55 |
150 |
°C | |
ESD |
Human Body Model(8) |
CLASS1 C |
|||
Machine Model(8) |
CLASS 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 FSQ-series 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. This device provides a basic platform that is well suited for costeffective designs of valley switching fly-back converters.