參數(shù)資料
型號(hào): TPS2113PWG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 電源管理
英文描述: 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封裝: GREEN, PLASTIC, TSSOP-8
文件頁數(shù): 7/21頁
文件大?。?/td> 373K
代理商: TPS2113PWG4
TPS2112
TPS2113
SLVS446 – DECEMBER 2002
www.ti.com
15
APPLICATION INFORMATION
Some applications have two energy sources, one of which should be used in preference to another. Figure 13
shows a circuit that will connect IN1 to OUT until the voltage at IN1 falls below a user-specified threshold. Once
the voltage on IN1 falls below this threshold, the TPS2112/3 will select the higher of the two supplies. This
usually means that the TPS2112/3 will swap to IN2.
STAT
EN
VSNS
ILIM
IN1
OUT
IN2
GND
1
2
3
4
8
7
6
5
TPS2113PW
0.1
F
0.1
F
CL
RL
IN1: 2.8 – 5.5 V
IN2: 2.8 – 5.5 V
R1
R2
RILIM
R3
Switch Status
Figure 13. Auto-Selecting for a Dual Power Supply Application
In Figure 14, the multiplexer selects between two power supplies based upon the EN logic signal. OUT
connects to IN1 if EN is logic 1, otherwise OUT connects to IN2. The logic thresholds for the EN terminal are
compatible with both TTL and CMOS logic.
STAT
EN
VSNS
ILIM
IN1
OUT
IN2
GND
1
2
3
4
8
7
6
5
TPS2113PW
0.1
F
0.1
F
CL
RL
IN1: 2.8 – 5.5 V
IN2: 2.8 – 5.5 V
RILIM
R1
Switch Status
Figure 14. Manually Switching Power Sources
相關(guān)PDF資料
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