L6563ATR datasheet(25/39 Pages) STMICROELECTRONICS

部件名	L6563ATR

功能描述	Advanced transition-mode PFC controller

PDF	39 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

25 / 39 page

L6563 - L6563A

Application information

25/39

Check that the maximum current sourced by the TBO pin (pin 6) does not exceed the

maximum specified (0.25mA):

Equation 10

In the following Mathcad® sheet, as an example, the calculation is shown for the circuit

illustrated in Figure 40. Figure 41 shows the internal block diagram of the tracking boost

function.

Design data

Vin1 := 88V

Vo1:= 200V

Vin2 := 264V

Vo2:= 385V

Vox ;= 400V

∆Vo ;= 40V

Step 1

choose: Vinx: = 270V

Step 2

Step 3

TBOmax

-------

0.25 10

–

⋅

≤

Vin

clamp:

Vox

–

--------------------------- Vin

⋅

Vox

–

--------------------------- Vin

⋅

–

Vinclamp = 278.27V

2Vin

⋅

-----------------------

k = 7.857 x 10-3

R1:

∆

----------- 10

⋅

R1 = 2 x 106

Ω

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