AMC3843B ETC, AMC3843B Datasheet - Page 7

• Manufacturer Part Number: AMC3843B
• Description: (AMC3842B / AMC3843B) CURRENT MODE PWM CONTROLLER
• Manufacturer: ETC

AMC DOC. #: AMC3842B_C (LF)
March 2004
Copyright © 2002, ADD Microtech Corp.
Shutdown
Fig. 5. Shutdown Techniques - there are two ways to shutdown the PWM controller: 1) raise the voltage at
I
Fig 6. Slop Compensation – To achieve duty cycles over 50% for some applications , the above
SENSE
330Ω
above 1V or, 2) pull the COMP below a voltage two diodes above ground.
slope compensation technique is suggested by resistively summing a fraction of the
oscillator ramp with the current sense signal.
1K
500Ω
To Current
Sense Resistor
R
I
SENSE
V
T
V
I
/C
REF
SENSE
Application Information (continued)
REF
T
0.1µF
R
C
T
7
T
Shutdown
R
C
C
2
R
URRENT
1
R
I
SENSE
SENSE
M
ODE
AMC3842B/43B
PWM C
COMP
ONTROLLER
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