TDA16846 datasheet(17/29 Pages) INFINEON

부품명	TDA16846

상세설명	Controller for Switch Mode Power Supplies Supporting Low Power Standby and Power Factor

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제조업체	INFINEON [Infineon Technologies AG]

홈페이지	http://www.infineon.com

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17 / 29 page

TDA 16846/16846-2

TDA 16847/16847-2

Version 2.0

17

31 Jul 2003

4

Temporary High Power Circuit FC2, PMO, REF

(Pin 6, 8, 9, TDA 16847-2)

Figure 14 shows the Temporary High Power Circuit:

Figure 14

The Temporary High Power Circuit (THPC) consists of two parts:

Firstly, a power measurement circuit is implemented: The capacitor

C

8 at Pin 8 is

charged with a constant current

I

8 during the discharge time of the flyback transformer

and grounded the other time. Thus the average of the sawtooth voltage

V

8 at Pin 8 is

proportional to the converter´s output power (at constant output voltages). The charge

current

I

8 for C8 is set by the resistor R9 at Pin 9:

I

8 =5 V/R9

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