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UC2843AQD8RG4Q1 Scheda tecnica(PDF) 4 Page - Texas Instruments

Il numero della parte UC2843AQD8RG4Q1
Spiegazioni elettronici  CURRENT-MODE PWM CONTROLLER
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UC2843A-Q1
SGLS384 – MAY 2008........................................................................................................................................................................................................ www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
TA = –40°C to 125°C, VCC = 15 V, RT = 10 kΩ, CT = 3.3 nF, TA = TJ (unless otherwise stated)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Output Section (OUT)
IOUT = 20 mA
0.1
0.4
Low level output voltage
V
IOUT = 200 mA
15
2.2
IOUT = –20 mA
13
13.5
High level output voltage
V
IOUT = –200 mA
12
13.5
Rise time(8)
CL = 1 nF
TJ = 25°C
50
150
ns
Fall time(8)
CL = 1 nF
TJ = 25°C
50
150
ns
UVLO saturation
VCC = 5 V, IOUT = 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
VCC internal zener voltage
ICC = 25 mA
30
34
V
(8)
Specified by design.
4
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