UTCTL494 Просмотр технического описания (PDF) - Unisonic Technologies

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UTCTL494

VOLTAGE MODE PWM CONTROL CIRCUIT

Unisonic Technologies 

UTCTL494 LINEAR INTEGRATED CIRCUIT

note 4: Standard deviation is a measure of the statistical distribution the mean as derived from the formula :

N

σ= Σ (xn-x)2

n=1

N-1

TEST CIRCUIT

Vcc=15V

TEST

INPUTS

12k Ω

0.01 µF

50k Ω

12

4

DEAD-TIME

Vcc

3

FEEDBACK

6

RT

5

CT

1

2

16

ERROR AMPLIFIER

15

13 OUTPUT CONTROL

GND

7

2W 150 Ω

C1 8

E1 9

C2 11

E2 10

Vref

OUTPUT

14

2W 150 Ω

OUTPUT 1

OUTPUT 2

VOLTAGE

at C1

VOLTAGE

at C2

VOLTAGE

at CT

DEAD-TIME

CONTROL INPUT

FEEDBACK

THRESHOLD VOLTAGE

THRESHOLD VOLTAGE

FIG 1. OPERATIONAL TEST CIRCUIT AND WAVEFORMS

UTC UNISONIC TECHNOLOGIES CO., LTD. 4

QW-R103-004,A

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