Datasheet

UC2843A-Q1
SGLS384 – MAY 2008 ........................................................................................................................................................................................................ www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
T
A
= – 40 ° C to 125 ° C, V
CC
= 15 V , R
T
= 10 k Ω , C
T
= 3.3 nF, T
A
= T
J
(unless otherwise stated)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Output Section (OUT)
I
OUT
= 20 mA 0.1 0.4
Low level output voltage V
I
OUT
= 200 mA 15 2.2
I
OUT
= – 20 mA 13 13.5
High level output voltage V
I
OUT
= – 200 mA 12 13.5
Rise time
(8)
C
L
= 1 nF T
J
= 25 ° C 50 150 ns
Fall time
(8)
C
L
= 1 nF T
J
= 25 ° C 50 150 ns
UVLO saturation V
CC
= 5 V, I
OUT
= 10 mA 0.7 1.2 V
Undervoltage Lockout Section (UVLO)
Start threshold 7.8 8.4 9 V
Minimum operation voltage after
7 7.6 8.2 V
turn on
PWM Section
Maximum duty cycle 94 96 100 %
Minimum duty cycle 0 %
Total Standby Current
Start-up current 0.3 0.5 mA
Operating supply current FB = 0 V, SENSE = 0 V 11 17 mA
V
CC
internal zener voltage I
CC
= 25 mA 30 34 V
(8) Specified by design.
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