NCP1653_09 datasheet(2/19 Pages) ONSEMI

部件名	NCP1653

功能描述	Compact, Fixed-Frequency Continuous Conduction Mode PFC Controller

PDF	19 Pages

Scroll/Zoom	100%

制造商	ONSEMI [ON Semiconductor]

网页	http://www.onsemi.com

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2 / 19 page

NCP1653, NCP1653A

http://onsemi.com

Figure 2. Functional Block Diagram

300 k

−

9 V

Input

EMI

Filter

Cfilter

RCS

Cbulk

off

RFB

Output Voltage (Vout)

IFB

Current

Mirror

Overvoltage

Protection

(IFB > 107% Iref)

Thermal

Shutdown

(120 / 150 °C)

Current

Mirror

ref

reg

96%

Regulation Block

ref

VCC

Internal Bias

Reference Block

18 V

VCC

UVLO

FB / SD

9 V

Current

Mirror

VCC

Output

Driver

PFC

Modulation

Cramp

Gnd

Ccontrol

Vcontrol

9 V

Overcurrent

Protection

(IS > 200 mA)

Vin

Iin

13.25 V

/ 8.7 V

Turn on

Rvac

Ivac

Cvac

12 k

9 V

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

VM =

RMISIvac

2 Icontrol

R1 = constant

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