NCP1653PG datasheet(2/19 Pages) ONSEMI

Part #	NCP1653PG

Description	Compact, Fixed?묯requency, Continuous Conduction Mode PFC Controller

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP1653, NCP1653A

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2

Figure 2. Functional Block Diagram

0

1

300 k

−

+

−

OR

1

8

4

5

2

3

7

6

9 V

0

1

0

x

+

9 V

AC

Input

EMI

Filter

Cfilter

RCS

Cbulk

off

on

RFB

Output Voltage (Vout)

L

IFB

Current

Mirror

Overvoltage

Protection

(IFB > 107% Iref)

Thermal

Shutdown

(120 / 150

°C)

Current

Mirror

FB

ref

reg

V

I

96%

Regulation Block

ref

I

VCC

Internal Bias

Reference Block

18 V

VCC

UVLO

FB / SD

9 V

Current

Mirror

VCC

Output

Driver

S

RQ

PFC

Modulation

Cramp

Gnd

Ccontrol

Vcontrol

9 V

Overcurrent

Protection

(IS > 200 mA)

IL

Vin

Iin

VM

IM

13.25 V

/ 8.7 V

Turn on

Rvac

Ivac

Cvac

In

12 k

9 V

CM

RM

IS

RS

CS

Drv

67 or 100 kHz clock

Vramp

Vref

Ich

Shutdown / UVP

(IFB < 8% Iref)

4% Iref Hysteresis

Overpower

Limitation

(IS Ivac > 3 nA2)

Icontrol =

Vcontrol

R1

VM =

RMISIvac

2 Icontrol

&

R1 = constant

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