AIC3843 查看數據表（PDF） - Analog Intergrations

零件编号

产品描述 (功能)

比赛名单

AIC3843

Current-Mode PWM Controller

Analog Intergrations 

AIC3843

Slope compensation

8

VREF

4

RT/ CT

3

ISENSE

AIC3843

0.1µF

RT

CT

C

R1

R2

n BLOCK DIAGRAM

ISENSE

A fraction of the oscillator ramp can be

resistively summed with the current sense

signal to proved slope compensation for

converters requiring duty cycles over 50%

Note that capacitor, C forms a filter with R2 to

suppress the leading edge switch spikes.

RSENSE

Fig. 8

VCC 7

ZD

5 34V

GND

UVLO

S/R

5V

REF

Internal Bias

4

RT/CT

2

VFB

1

COMP

3

ISENSE

2.50V

OSC

Error Amp.

+

-

D1

D2 2R

VREF

Good

Logic

R

Z1

1V

T

S

R

Current

Sense

comparator

PWM

Latch

8

Q1

6

Q2

VREF

5V/50mA

OUTPUT

8

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