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UC1856-SP датащи(PDF) 3 Page - Texas Instruments

номер детали UC1856-SP
подробное описание детали  UC1856-SP Improved Current-Mode PWM Controller
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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UC1856-SP датащи(HTML) 3 Page - Texas Instruments

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UC1856-SP
www.ti.com
SLUSBV6 – APRIL 2014
5 Pin Configuration and Functions
16-Pin
J and HKT Packages
(Top View)
Pin Functions
PIN
I/O
DESCRIPTION
NAME
NO.
CL SS
1
I
Current limit/Soft start
VREF
2
O
5.1V internally generated reference
CS-
3
I
Inverting input of current sense operational amplifier
CS+
4
I
Non-Inverting input of current sense operational amplifier
EA+
5
I
Non-Inverting input of error amplifier
EA-
6
I
Inverting input of error amplifier
COMP
7
O
Output of error amplifier
Timing capacitance. Capacitor connected from CT to ground is charged via current
CT
8
I
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 which is mirrored
RT
9
I
to CT pin.
Sync pin is an output under normal operation when RT is above 4.1V Sync output high. Sync
SYNC
10
I/O
pin is an input when RT pin is high and CT pin tied low.
AOUT
11
O
Output driver (source/sink)
GND
12
-
Ground connection
VC
13
I
Gate drive collector supply voltage. Decouple with capacitor.
BOUT
14
O
Output driver (source/sink)
VIN
15
I
Input voltage decouple with capacitor
SHUTDOWN
16
I
Shutdown threshold 1V. Voltage above threshold latches off oscillator.
Copyright © 2014, Texas Instruments Incorporated
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