CM3842 データシートの表示（PDF） - Unspecified

部品番号

コンポーネント説明

メーカー

CM3842

CURRENT MODE PWM CONTROLLER

Unspecified 

CM3842/3843

CURRENT MODE PWM CONTROLLER

APPLICATION INFORMATION (continued)

1K

VREF

COMP

330Ω

Shutdown

ISENSE

500Ω

Shutdown

To Current

Sense Resistor

Fig. 5. Shutdown Techniques - there are two ways to shutdown the PWM controller: 1) raise the voltage at

ISENSE above 1V or, 2) pull the COMP below a voltage two diodes above ground.

VREF

RT/CT

ISENSE

0.1µF RT

CT

R2

R1

C

ISENSE

RSENSE

Fig 6. Slop Compensation – To achieve duty cycles over 50% for some applications , the above

slope compensation technique is suggested by resistively summing a fraction of the

oscillator ramp with the current sense signal.

2001/06/27 Advanced

Champion Microelectronic Corporation

Page 7

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