L6566A データシートの表示（PDF） - STMicroelectronics

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L6566A

Multi-mode controller for SMPS with PFC front-end

STMicroelectronics 

L6566A

Multi-mode controller for SMPS with PFC front-end

Datasheet −production data

Features

■ Selectable multi-mode operation: fixed

frequency or quasi-resonant

■ Onboard 700 V high-voltage startup

■ Advanced light load management

■ Low quiescent current (< 3 mA)

■ Adaptive UVLO

■ Line feedforward for constant power capability

vs. mains voltage

■ Pulse-by-pulse OCP, shutdown on overload

(latched or auto-restart)

■ Transformer saturation detection

■ Switched supply rail for PFC controller

■ Latched or auto-restart OVP

■ Brownout protection

■ -600/+800 mA totem pole gate-driver with

active pull-down during UVLO

■ SO16N package

SO16N

Applications

■ Notebook, TV and LCD monitor adapters

■ High power chargers

■ PDP/LCD TVs

■ Consumer appliances, such as DVD players,

VCRs, set-top boxes

■ IT equipment, games, auxiliary power supplies

■ Power supplies in excess of 150 W

Figure 1.

Block diagram

VREF

SS

COMP

VFF

1

HV

Icharge

VCC 5

10

14

TIME

SOFT-START OUT

&

FAULT MNGT

VOLTAGE

REGULATOR

&

ADAPTIVE UVLO

OCP2

Reference

voltages

Internal supply

UVLO

VCC

9

LOW CLAMP

& DISABLE

OFF2

15

VCC

OVP

6.4V

1 mA

OVPL

LINE VOLTAGE

FEEDFORWARD

7.7V

Q

CS

LEB

1.5 V

7

-+ -+ +-

Vth

PWM OCP

VCC

6

Vcc_PFC

IC_LATCH

AC_FAIL

UVLO_SHF

-

+

400 uA

+

5.7V

-

BURST-MODE

Hiccup-mode

OCP logic

14V

OCP2

OSC 13

OSCILLATOR

MODE/SC 12

50 mV

100 mV

MODE SELECTION

&

TURN-ON LOGIC

ZERO CURRENT

-

DETECTOR

R

Q

S

TIME

OUT OVPL

DRIVER

4

GD

ZCD

11

+

OVERVOLTAGE

PROTECTION

OVP

LATCH

OFF2

IC_LATCH

4.5V

DIS

8

16

AC_OK

-

3V

15 µA 0.450V

0.485V

+

AC_FAIL

UVLO

DISABLE

3

GND

March 2012

This is information on a product in full production.

Doc ID 13794 Rev 4

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