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L6562AN

Transition-mode PFC controller, 1% Vref, 30μA Istart, 600/800mA gate, DIP-8

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Manufacturer Part：

L6562AN

Package：

DIP-8 (9.8 x 6.6 x 3.9mm)

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Description

Product Overview

The L6562AN from STMicroelectronics is a transition-mode (TM) power factor correction (PFC) controller in a DIP-8 package. It features a highly linear multiplier with THD optimizer, 1% accurate internal reference, ultra-low 30μA startup current, and 600mA/800mA source/sink gate driver for IEC61000-3-2 compliant power supplies up to 400W.

Key Specifications

Operating Mode Transition Mode (Critical Conduction Mode)
Supply Voltage 10.5V to 22.5V
Startup Current 30μA typ.
Quiescent Current 2.5mA typ.
Reference Voltage 2.5V (1% accuracy at TJ=25°C)
Gate Drive Source Current -600mA peak
Gate Drive Sink Current +800mA peak
OVP Dynamic and Static overvoltage protection
Disable Function Voltage on INV pin below 0.2V
Package DIP-8 (through-hole)
Operating Temperature -25°C to +125°C

Features

  • Proprietary multiplier design for minimum THD
  • Very accurate adjustable output overvoltage protection
  • Ultra-low 30μA startup current
  • Low 2.5mA quiescent current
  • Digital leading-edge blanking on current sense
  • Disable function via INV pin
  • 1% internal reference voltage accuracy
  • 600mA/800mA totem pole gate driver
  • Active pull-down during UVLO and voltage clamp
  • THD optimizer circuit for reduced crossover distortion

Applications

  • PFC pre-regulators for IEC61000-3-2 compliant SMPS
  • Flat TV and monitor power supplies
  • Desktop PC and gaming console PSUs
  • High-end AC-DC adapters up to 400W
  • Electronic ballasts

The L6562AN from STMicroelectronics is a current-mode PFC controller operating in transition mode (TM). Sharing the same pinout as predecessors L6561 and L6562, it offers improved performance with a highly linear multiplier featuring a THD optimizer circuit that reduces AC input current distortion near zero-crossings. The device features an accurate 1% internal reference voltage, dynamic and static output overvoltage protection, ultra-low 30μA startup current, and a -600mA/+800mA totem-pole gate driver suitable for driving external MOSFETs in PFC boost converters up to 400W.

The L6562A controls an external MOSFET in a boost converter topology operating in critical conduction mode (transition mode). The multiplier generates a reference current signal proportional to both the rectified AC input voltage (via the MULT pin) and the error amplifier output (via INV/COMP pins). The MOSFET turns on at the start of each switching cycle and turns off when the source current through the sense resistor reaches the multiplier reference. The ZCD pin detects when the boost inductor current returns to zero, triggering the next MOSFET turn-on. This zero-current switching minimizes switching losses and naturally shapes the input current to follow the line voltage, achieving high power factor.

Pin Name Type Function
1 INV Input Error amplifier inverting input / disable (below 0.2V = off)
2 COMP I/O Error amplifier output / compensation network
3 MULT Input Multiplier input (rectified AC voltage sense)
4 CS Input Current sense input (peak current limiting)
5 ZCD Input Zero current detection (inductor demagnetization)
6 GND Power Ground
7 GD Output Gate driver output for external MOSFET
8 VCC Power Supply voltage (10.5V to 22.5V)
  • IEC61000-3-2 compliant PFC pre-regulators for flat TVs and monitors
  • Desktop PC and server power supply PFC stages (up to 400W)
  • High-end AC-DC adapter and charger PFC front-ends
  • Electronic ballast power factor correction
  • Dimmable 80W offline LED driver PFC stages
Manufacturer Part Number Package Notes
ST L6562AD SO-8 SMD version, same function
ST L6562ADTR SO-8 Tape and reel SMD version
ST L6561N DIP-8 Predecessor, less features
TI UCC28051D SO-8 Transition-mode PFC controller
Infineon ICE2PCS01G SO-8 CCM/TM PFC controller alternative
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