NCP1654 datasheet(6/23 Pages) ONSEMI

Part #	NCP1654

Description	Power Factor Controller for Compact and Robust, Continuous Conduction Mode Pre-Converters

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP1654

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6

-

+

-

+

105% Vref

8% Vref with 4% Vref

Hysteresis

UVP

OVP

Undervoltage

Lock−Out

Reference

Block

Bias Block

Iref

Vdd

Vref

Vcc

DRV

GND

Output

Buffer

8

7

1

UVLO

BO

+

-

OTA

±28 mA

Vcontrol

Vref

OPL

Vdd

Off

+

-

95% Vref

6

5

Q

R

S

Vdd

+

-

Current Mirror

BO

4

BO

Thermal

Shutdown

+

-

Vref

+ -

Vm

Figure 1. Functional Block Diagram

Ics > 200 mA

Ics

CS

3

Vdd

C1

S1

Division

2

65/133/200 kHz

Oscillator

Vref/10% Vref

Vdd

Iref

+

Im = (Ics*Vbo) / (4*(Vcontrol − Vcontrol(min))

Ics*Vbo > 200 mVA

Q

R

RS

PWM

Latch

OL

OPL

OCP

Ics

Vbo

Fault

OVP

VboH / VboL

VboH = 1.3 V, VboL = 0.7 V

FB

200 mA

Vout Low Detect

Vin

+

−

IN

RM

CM

Output

Voltage

(VOUT)

EMI

Filter

AC

Input

Iin

L

IL

RSENSE

Cbulk

RZ

CP

CZ

RCS

RboU

RfbL

RfbU

CBO

RboL

Vcontrol(min)

+

Cfilter

Soft Start

OL

Vramp

UVP BO

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