AN826 查看數據表（PDF） - STMicroelectronics

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产品描述 (功能)

生产厂家

AN826

250W HIGH POWER FACTOR SUPPLY FOR TV

STMicroelectronics 

APPLICATION NOTE

Load Regulation:

a) 135V Output (4) = ±0.12% @

b) 135V Output (4) = ±0.75% @

c) 135V Output (4) = ±0.75% @

d) 135V Output (4) = ±0.1% @

±14V Output (1 + 3) = +60% for

Io4 (135V) = 0.05 to 1A

Io5 (15V) = 2.5A

Io6 (7.5V) = 2.5A

Io1 (14V0 = 1.3A

Io3 (-14V) = -1.3A

Io4 (135V) = 1A

Io5 (15V) = 2.5A to 0A

Io6 (7.5V) = 2.5A

Io1 (14V0 = 1.3A

Io3 (-14V) = -1.3A

Io4 (135V) = 1A

Io5 (15V) = 2.5A

Io6 (7.5V) = 2.5A to 0A

Io1 (14V0 = 1.3A

Io3 (-14V) = -1.3A

Io4 (135V) = 0.05A

Io5 (15V) = 2.5A

Io6 (7.5V) = 2.5A

Io1 + 3 (±14V) = -1.3A to 0A

I = 1.3 to 0A

In the attached photos (1 to 4 ) the essential

waveforms are depicted (ref. fig. 2a).

Photo 1: PFC Section

(Pout = 230W; IL = 1A/div; Vi = 100V/div;

t = 2ms/div)

Photo 2: Flyback Section

(Pout = 230W; IC = 1A/div; Vce = 200V/div;

t = 10µs/div)

0

0

Vi

TR2

IL

D95IN259

D9

T3

Ic

IC

VCE

D95IN292

T4

Vce

5/7

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