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UCC28250RGPT Datasheet(PDF) 10 Page - Texas Instruments

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Part # UCC28250RGPT
Description  Advanced PWM Controller With Pre-Bias Operation
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

UCC28250RGPT Datasheet(HTML) 10 Page - Texas Instruments

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UCC28250
SLUSA29A – APRIL 2010 – REVISED JUNE 2010
www.ti.com
TERMINAL FUNCTIONS
QFN-20
PW-20
NAME
I/O
FUNCTION
5
12
VDD
I
Bias supply input.
20
7
VREF
O
3.3-V reference output.
18
5
EN
I
Device enable and disable.
15
2
RT
I
Oscillator frequency set or synchronous clock input.
12
19
SP
I
Synchronous rectifier off to primary on dead-time set .
11
18
PS
I
Primary off to synchronous rectifier on dead-time set .
PWM ramp input (for voltage mode control) or current sense input (for current
16
3
RAMP/CS
I
mode control).
1
8
REF/EA+
I
Error amplifier non-inverting input.
2
9
FB/EA-
I
Error amplifier inverting input.
3
10
COMP
I/O
Error amplifier output.
14
1
VSENSE
I
Output voltage sensing for pre-bias control.
13
20
SS
I/O
Soft-start programming.
17
4
ILIM
I
Current sense for cycle-by-cycle over-current protection.
10
17
HICC
I
Cycle-by-cycle current limit time delay and Hiccup time setting.
19
6
OVP/OTP
I
Over voltage and over temperature protection pin.
9
16
OUTA
O
0.2-A sink/source primary switching output.
8
15
OUTB
O
0.2-A sink/source primary switching output.
7
14
SRA
O
0.2-A sink/source synchronous rectifier output.
6
13
SRB
O
0.2-A sink/source synchronous rectifier output.
4
11
GND
I
Ground.
10
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Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): UCC28250


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