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UCC2540 Datasheet(PDF) 21 Page - Texas Instruments

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Part # UCC2540
Description  HIGH EFFICIENCY SECONDARY SIDE SYNCHRONOUS BUCK PWM CONTROLLER
PDF  37 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

UCC2540 Datasheet(HTML) 21 Page - Texas Instruments

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UCC2540
SLUS539A − JUNE 2004 − REVISED AUGUST 2004
21
www.ti.com
APPLICATION INFORMATION
UDG−04038
Drive (7.2 V)
Regulator
VREF (3.3 V)
Regulator
Predictive
Logic
16
13
2
VDD
VDRV
VREF
BST
19
18
20
17
14
12
15
G1
SWS
SW
G2
G2S
PGND
High−Side
Driver
Low−Side
Driver
C1
D1
C2
C3
C4
Q1
Q2
D2
Vin
0 V
Rectified Bias
UCC2540
8.5 V
≤ VVDD ≤ 35 V
8.5 V
≤ VIN ≤ 35 V
Figure 13. Mode 1 With Rectified Biasing for Input Voltages Between 8.5 V and 35 V
Drive (7.2 V)
Regulator
VREF (3.3 V)
Regulator
Predictive
Logic
16
13
2
VDD
VDRV
VREF
BST
19
18
20
17
14
12
15
G1
SWS
SW
G2
G2S
PGND
High−Side
Driver
Low−Side
Driver
C1
D1
C2
C3
C4
Q1
Q2
Vin
0 V
AUX Bias
UCC2540
UDG−04039
8.5 V
≤ VVDD ≤ 35 V
0 V
≤ VIN ≤ 35 V
Figure 14. Mode 1 With Auxiliary Biasing for Bias Voltages Between 8.5 V and 35 V



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