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UC1844A-SP Datenblatt(PDF) 6 Page - Texas Instruments

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Teilenummer UC1844A-SP
Bauteilbeschribung  QML Class V, Current-Mode PWM Controller
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Hersteller  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
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UC1844A-SP Datenblatt(HTML) 6 Page - Texas Instruments

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UC1842A-SP, UC1843A-SP, UC1844A-SP
SLUS872D – JANUARY 2009 – REVISED MAY 2015
www.ti.com
Electrical Characteristics (continued)
VCC = 15 V
(1), R
T = 10 kΩ, CT = 3.3 nF, TA = TJ = –55°C to 125°C (unless otherwise noted)
(2)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Rise time
CL = 1 nF, TJ = 25°C
(3)
50
150
ns
Fall time
CL = 1 nF, TJ = 25°C
(3)
50
150
ns
UVLO saturation
VCC = 5 V, ISINK = 10 mA
0.7
1.2
V
UNDERVOLTAGE LOCKOUT
UC1842A, UC1844A
15
16
17
Start threshold
V
UC1843A
7.8
8.4
9
UC1842A, UC1844A
9
10
11
Minimum operation voltage after turn-on
V
UC1843A
7
7.6
8.2
PWM
UC1842A, UC1843A
94%
96%
100%
Maximum duty cycle
UC1844A
47%
48%
50%
Minimum duty cycle
0%
TOTAL STANDBY CURRENT
Start-up current
0.3
0.5
mA
Operating supply current
VFB = VISENSE = 0 V
11
17
mA
VCC Zener voltage
ICC = 25 mA
30
34
V
6
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Product Folder Links: UC1842A-SP UC1843A-SP UC1844A-SP


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