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Updated at 17/06/2025 10:30:15(UTC+8)

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Description

Description
A Valley Switching Converter 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.
Features
■ Optimized for Valley Switching Converter (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 Power Consumption
■ Pulse-by-Pulse Current Limit
■ Protection Functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal Over Current Protection (AOCP), Internal Thermal Shutdown (TSD)
■ Under-Voltage Lockout (UVLO) with Hysteresis
■ Internal Startup Circuit
■ Internal High-Voltage SenseFET: 650V
■ Built-in Soft-Start: 15ms
Applications
■ Power Supplies for DVP Player, DVD Recorder, Set-Top Box
■ Adapter
■ Auxiliary Power Supply for PC, LCD TV, and PDP TV

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FSQ0165RN Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Through Hole
Number of Pins	8 Pin
Case/Package	DIP-8
Frequency	55.6 kHz
Supply Voltage (DC)	0.00V(min), 15.0V(max)
Power Rating	15 W
Number of Outputs	1 Output
Output Voltage	700 V
Output Current	0.8 A
Breakdown Voltage	650 V
Supply Current	3 mA
Number of Positions	8 Position
Power Dissipation	1.5 W
Switching Frequency	55kHz ~ 67kHz
Output Current (Min)	0.8 A
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
Power Dissipation (Max)	1500 mW
Supply Voltage (Max)	15 V
Supply Voltage (Min)	0 V
Input Voltage	8V ~ 20V
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Size-Height	3.68 mm
Operating Temperature	-40℃ ~ 85℃ (TA)
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/06/15
ECCN Code	EAR99

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