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–Bypass capacitance should be low ESR and ESL type.
–Short pins 6 and 7 for unity gain testing.
UC1846-EP
(12 V)
Frequency Set and
Max Duty Cycle R
T
Timing
Cap C
T
5 V
5 V
5 V
Current-Limit
Adjust
I
SENSE
Adjust
(91 V PK)
1 nF
0.1 mF
4.7 nF
Duty-Cycle
Adjust
V
REF
(5-V Output)
V
IN
(12 V)
5 V
0.1 mF
150 W
150 W
UC1846-EP
CURRENT-MODE PWM CONTROLLER
SGLS329 – MAY 2006
APPLICATION INFORMATION (continued)
Figure 10. Open-Loop Test Circuit
11
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