700V Integrated Power Switch with 130kHz frequency and no bias winding for 2.5W offline flyback converters

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Overview

The FSQ500L is specially designed for a replacement of linear power supplies with low cost. This device combines current-mode Pulse Width Modulator (PWM) with a senseFET. The integrated PWM controller features include: a fixed oscillator, Under Voltage Lockout (UVLO) protection, Overload Protection (OLP), Leading-Edge Blanking (LEB), an optimized gate turn-on/turn-off driver, Thermal Shutdown (TSD) protection with hysteresis, and temperature-compensated precision-current sources for loop compensation. When compared to a linear power supply, the FSQ500L device reduces total size and weight, while increasing efficiency, productivity, and system reliability. This device provides a basic platform for cost-effective flyback converters

  • DVD
  • STB
  • Video Game Console
  • Consumer Appliances
  • Single Chip 700V SenseFET Power Switch
  • Precision Fixed Operating Frequency: 130kHz
  • No-load consumption 250mW at 265VAC with Burst Mode and Down to 60mW with External Bias
  • Internal Startup Switch
  • Soft-Start Time Tuned by External Capacitor
  • Under-Voltage Lockout (UVLO) with Hysteresis
  • Pulse-by-Pulse Current Limit
  • Overload Protection (OLP) and Internal Thermal Shutdown Function (TSD) with Hysteresis
  • Auto-Restart Mode
  • No Need for Auxiliary Bias Winding

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fsw Typ (kHz)

fJitter Typ (%)

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FSQ500L

Active

Pb

A

H

P

SOT-223-4 / TO-261-4

1

260

REEL

4000

Y

Current Mode

130

-

-

25

700

280

Yes

-

Yes

Yes

-

-

No

$0.4591

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