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UC1846-SP датащи(PDF) 3 Page - Texas Instruments

номер детали UC1846-SP
подробное описание детали  Current-Mode PWM Controller
Download  29 Pages
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

UC1846-SP датащи(HTML) 3 Page - Texas Instruments

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3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
B Out
V
C
NC
Gnd
A Out
C/S–
C/S+
NC
E/A+
E/A–
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C/L SS
C/S–
C/S+
E/A+
E/A–
Comp
C
T
Shutdown
V
IN
B Out
V
C
Gnd
A Out
Sync
R
T
V
REF
UC1846-SP
www.ti.com
SLUS871C – JANUARY 2009 – REVISED OCTOBER 2015
5 Pin Configuration and Functions
FK Package
J or W Package
20-Pin LCCC
16-Pin CDIP or CFP
Top View
Top View
Pin Functions
PIN
I/O
DESCRIPTION
NAME
CDIP or CFP
LCCC
CL SS
1
2
I
Current limit/Soft start
VREF
2
3
O
5.1-V internally generated reference
CS-
3
4
I
Inverting input of current sense operational amplifier
CS+
4
5
I
Non-Inverting input of current sense operational amplifier
EA+
5
7
I
Non-Inverting input of error amplifier
EA-
6
8
I
Inverting input of error amplifier
COMP
7
9
O
Output of error amplifier
Timing capacitance. Capacitor connected from CT to ground is charged via
CT
8
10
I
current established by RT pin via current mirror. Output Pulse dead time is
determined by the size of the capacitor during capacitor discharge time.
Determines oscillator frequency. VREF sources thru RT to create a current
RT
9
12
I
which is mirrored to CT pin.
Sync pin is an output under normal operation when RT is above 4.1-V Sync
SYNC
10
13
I/O
output high. Sync pin is an input when RT pin is high and CT pin tied low.
AOUT
11
14
O
Output driver (source/sink)
GND
12
15
Ground connection
VC
13
17
I
Gate drive collector supply voltage. Decouple with capacitor.
BOUT
14
18
O
Output driver (source/sink)
VIN
15
19
I
Input voltage decouple with capacitor
SHUTDOWN
16
20
I
Shutdown threshold 1 V. Voltage above threshold latches off oscillator.
NC
1, 6, 11
No connect
Copyright © 2009–2015, Texas Instruments Incorporated
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