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UC1843A-SP 数据表(PDF) 3 Page - Texas Instruments

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部件名 UC1843A-SP
功能描述  QML Class V, Current-Mode PWM Controller
Download  31 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

UC1843A-SP 数据表(HTML) 3 Page - Texas Instruments

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1
2
3
4
5
6
7
8
9 10 11 12 13
14
15
16
17
18
19
20
V
FB
N/C
I
SENSE
N/C
N/C
Output
N/C
V
C
V
CC
N/C
1
2
3
4
5
6
7
8
Gnd
Output
V
CC
V
REF
R /C
T
T
I
SENSE
V
FB
Comp
UC1842A-SP, UC1843A-SP, UC1844A-SP
www.ti.com
SLUS872D – JANUARY 2009 – REVISED MAY 2015
6 Device Comparison Table
PART NO.
UVLO ON
UVLO OFF
MAXIMUM DUTY CYCLE
UC1842A
16 V
10 V
<100%
UC1843A
8.5 V
7.9 V
<100%
UC1844A
16 V
10 V
<50%
7 Pin Configuration and Functions
JG Package
FK Package
8-Pin CDIP
20-Pin LCCC
Top View
Top View
Pin Functions
PIN
I/O
DESCRIPTION
NAME
CDIP
LCCC
Comp
1
2
I
Error amplifier output
VFB
2
5
I
Voltage feedback input to error amplifier
ISENSE(C/S)
3
7
I
Current sense comparator input pin
RT/CT
4
10
I
RC time constant input to oscillator
1, 3, 4, 6, 8, 9,
NC
No connect
11, 14, 16, 19
Pwr Gnd
12
Output section ground
Gnd
5
13
Ground
Output
6
15
O
Regulated output
VC
17
Output section supply voltage
VCC
7
18
Unregulated supply voltage
VREF
8
20
O
5-V internally generated reference
Copyright © 2009–2015, Texas Instruments Incorporated
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Product Folder Links: UC1842A-SP UC1843A-SP UC1844A-SP


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