參數(shù)資料
型號(hào): TPS2112APWRG4
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(yè)數(shù): 25/27頁(yè)
文件大?。?/td> 714K
代理商: TPS2112APWRG4
IN1
IN2
OUT
GND
6
7
8
5
4
STAT
EN
VSNS
ILIM
GND
1
2
3
STAT
EN
VSNS
ILIM
IN1
OUT
IN2
GND
1
2
3
4
8
7
6
5
www.ti.com
SBVS045B – MARCH 2004 – REVISED MARCH 2010
DEVICE INFORMATION
TRUTH TABLE
EN
VI(VSNS) > 0.8 V
(1)
VI(IN2) > VI(IN1)
STAT
OUT(2)
0
Yes
X
0
IN1
0
No
0
IN1
0
No
Yes
Hi-Z
IN2
1
X
0
Hi-Z
(1)
X = Don’t care.
(2)
The undervoltage lockout circuit causes the output (OUT) to go Hi-Z if the selected power supply does not exceed the IN1/IN2 UVLO, or
if neither of the supplies exceeds the internal VDD UVLO.
PIN CONFIGURATIONS
PW PACKAGE
DRB PACKAGE
TSSOP-8
SON-8
(TOP VIEW)
Table 1. TERMINAL FUNCTIONS
TERMINAL
NAME
NO.
I/O
DESCRIPTION
TTL- and CMOS-compatible input with a 1-mA pull-up. The Truth Table illustrates the
EN
2
I
functionality of EN.
GND
5
Power
Ground
Primary power switch input. The IN1 switch can be enabled only if the IN1 supply is above
IN1
8
I
the UVLO threshold and at least one supply exceeds the internal VDD UVLO.
Secondary power switch input. The IN2 switch can be enabled only if the IN2 supply is
IN2
6
I
above the UVLO threshold and at least one supply exceeds the internal VDD UVLO.
A resistor (RILIM) from ILIM to GND sets the current limit (IL) to 250/RILIM and 500/RILIM for
ILIM
4
I
the TPS2112A and TPS2113A, respectively.
OUT
7
O
Power switch output
STAT is an open-drain output that is Hi-Z if the IN2 switch is ON. STAT pulls low if the IN1
STAT
1
O
switch is ON or if OUT is Hi-Z (that is, EN is equal to logic '0')
An internal power FET connects OUT to IN1 if the VSNS voltage is greater than 0.8 V.
VSNS
3
I
Otherwise, the FET connects OUT to the higher of IN1 and IN2. The Truth Table illustrates
the functionality of VSNS.
DRB package only. Connect to GND. Must be connected to large copper area in order to
Pad
Power
meet stated package dissipation ratings.
Copyright 2004–2010, Texas Instruments Incorporated
7
Product Folder Link(s): TPS2112A TPS2113A
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TPS2113APWRG4 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
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