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UCC2540PWPR Datasheet(PDF) 11 Page - Texas Instruments

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Part # UCC2540PWPR
Description  SYNCHRONOUS BUCK PWM CONTROLLER
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

UCC2540PWPR Datasheet(HTML) 11 Page - Texas Instruments

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UCC2540
SLUS539C − JUNE 2004 − REVISED OCTOBER 2008
11
www.ti.com
APPLICATION INFORMATION
Using UCC2540 as the Secondary-Side Post Regulator
UCC2540 can also be used as a secondary-side post regulator (SSPR) for precision regulation of the auxiliary
voltages of multiple output power supplies, as shown in Figure 4. The UCC2540 uses leading-edge modulation
so that it is compatible with either voltage-mode or current-mode primary-side control converters using any
topology such as forward, half-bridge or push-pull.
C1
OUT1
OUT2
INPUT
C2
Q2’
Q1’
NP1
NP2
Q1
Q2
L2
MAIN
OUTPUT
UCC2540
14
18
G2
G1
4
SYNCIN
C3
Q6
Q5
PWM2
L3
AUX
OUT1
PWM2
1
FB
UCC3808x
UDG−02145
VFB
Figure 4. Multiple Output Converter with Primary Side Push−Pull Converter


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