TDA16847 데이터 시트보기 (PDF) - Infineon Technologies

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TDA16847

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

Infineon Technologies 

TDA 16846

TDA 16846-2

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 C8 at Pin 8 is

charged with a constant current I8 during the discharge time of the flyback transformer

and grounded the other time. Thus the average of the sawtooth voltage V8 at Pin 8 is

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

current I8 for C8 is set by the resistor R9 at Pin 9:

I8 = 5 V/R9

Data Sheet

17

2003-07-31

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