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参数资料
| 型号： | TPS40132RHBT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 40 A SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封装： | GREEN, PLASTIC, QFN-32 |
| 文件页数： | 2/40页 |
| 文件大小： | 1032K |
| 代理商： | TPS40132RHBT |
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Startup Sequence
UDG-07118
PGOOD
VIN5
BP5
EN/SYNC
SSWAIT
(32Clock)
1.0V
5V
HiccupRestartEnabled
0.6V
SS
VOUT
t
SS
Differential Amplifier (U7)
4
3
GSNS
DIFFO
VOUT
+
Differential
Amplifier
TPS40132
5
20 k
20 k
20 k
20 k
UDG04081
SLUS776A – DECEMBER 2007 – REVISED FEBRUARY 2008
Figure 1 shows a typical start up with the VIN5 and BP5 applied to the controller and then the EN/SYNC being
enabled. Shut down occurs when the VIN5 is removed
Figure 1. Startup and Shutdown Sequence
The unity gain differential amplifier with high bandwidth allows improved regulation at a user-defined point and
eases layout constraints. The output voltage is sensed between the VOUT and GSNS pins. The output voltage
programming divider is connected to the output of the amplifier (DIFFO).
If there is no need for a differential amplifier, the differential amplifier can be disabled by connecting the GSNS
pin to the BP5 pin and leaving VOUT and DIFFO open. The voltage programming divider in this case should be
connected directly to the output of the converter. The overall system accuracy will be degraded without using the
internal differential amplifier.
Figure 2. Differential Amplifier Configuration
Because of the resistor configuration of the differential amplifier, the input impedance must be kept very low or
there an error occurs in setting the output voltage.
10
Copyright 2007–2008, Texas Instruments Incorporated
Product Folder Link(s) :TPS40132
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