AMC DOC. #: AMC3842B_C (LF)

AMC3842B/43B

March

2004

Copyright

© 2002, ADD Microtech Corp.

7

www.addmtek.com

Application Information (continued)

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

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.

1K

COMP

Shutdown

330

Ω

Shutdown

500

Ω

To Current

Sense Resistor

0.1

µF

C