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TPS2830 データシート(PDF) 11 Page - Texas Instruments

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部品番号 TPS2830
部品情報  FAST SYNCHRONOUS-BUCK MOSFET DRIVERS
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

TPS2830 データシート(HTML) 11 Page - Texas Instruments

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TPS2830, TPS2831
FAST SYNCHRONOUSBUCK MOSFET DRIVERS
WITH DEADTIME CONTROL
SLVS196C − JANUARY1999 − REVISED JANUARY 2001
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
Figure 16 shows the circuit schematic of a 100-kHz synchronous-buck converter implemented with a TL5001A
pulse-width-modulation (PWM) controller and a TPS2831 driver. The converter operates over an input range from
4.5 V to 12 V and has a 3.3-V output. The circuit can supply 3 A continuous load. The converter achieves an efficiency
of 94% for VIN = 5 V, Iload=1 A, and 93% for Vin = 5 V, Iload = 3 A.
C14
1
µF
R9
90.9 k
R8
121 k
C9
0.22
µF
VCC
RT
FB
COMP
GND
OUT
DTC
SCP
U2
TL5001A
1
2
6
5
8
3
4
7
C1
1
µF
R10
1.0 k
R2
1.6 k
C2
0.033
µF
C3
0.0022
µF
C8
0.1
µF
C4
0.022
µF
R3
180
R4
2.32 k
GND
Q2
Si4410
R7
3.3
C6
1000 pF
VIN
C5
100
µF
C10
100
µF
C11
0.47
µF
3.3 V
C13
10
µF
C7
100
µF
C12
100
µF
Q1
Si4410
L1
27
µH
IN
BOOTLO
HIGHDR
NC
BOOT
ENABLE
CROWBAR
NC
U1
TPS2831
1
2
3
4
14
13
12
11
SYNC
DT
PGND
5
6
7
VCC
NC
LOWDR
10
9
8
R1
1 k
C15
1.0
µF
R6
1 M
R5
0
R11
4.7
RTN
+
+
+
+
Figure 16. 3.3-V 3-A Synchronous-Buck Converter Circuit


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