參數(shù)資料
型號(hào)： TPS2459RHB
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 電源管理
英文描述： 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32
封裝： PLASTIC, QFN-32
文件頁(yè)數(shù)： 47/48頁(yè)
文件大?。?/td> 852K
代理商： TPS2459RHB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
G
N
D
B
O
R
E
N
P
A
S
E
N
M
S
E
T
G
N
D
N
A
0
G
N
D
A
E
N
1
2
G
N
D
E
N
3
A
2
VINT
SDA
SCL
PG12
SUM12
FLT12
OUT12
BLK
PowerPADTM
S
E
N
P
IN
1
2
N
C
TPS2459
(Top View)
24
23
22
21
20
19
18
17
25
AGND
VDD3
SUM3
PG3
FLT3
GNDS
OUT3
A1
3-V
Inputs
12-V Inputs
12-V
Inputs
IN
3
SLUS917D – FEBRUARY 2009 – REVISED MAY 2010
www.ti.com
DEVICE INFORMATION
Figure 1.
TERMINAL FUNCTIONS
PIN
NAME
I/O
DESCRIPTION
NO.
A0
30
I
I2C address programming bit, LSB
A1
18
I
I2C address programming bit, LSB+1
A2
25
I
I2C address programming bit, LSB+2
Analog ground. Ground pin for the analog circuitry insideBypass capacitor connection point for internal supply
AGND
23
—
the TPS2459.
12-V blocking transistor gate drive. Gate drive pin for the 12-V channel BLK FET. This pin sources 30 mA to
BLK
6
O
turn the FET on. An internal clam prevents this pin from rising more than 14.5 V above OUT12. Setting the
OREN pin high holds the BLK pin low.
12-V enable. (active high). Pulling this pin low turns off the 12-V channel by pulling both BLK and PASS low.
EN12
28
I
An internal 200-k
resistor pulls this pin up to VINT when disconnected.
3-V enable. (active high) Pulling this pin low turns off the 3-V channel by pulling the gate of the internal pass
EN3
26
I
FET to GND. An internal 200-k
resistor pulls this pin up to VINT when disconnected.
12-V fault output (active low) Open-drain output indicating that channel 12 has remained in current limit long
FLT12
7
O
enough to time out the fault timer and shut the channel down. asserted when 12-V fault timer runs out
3-V fault output (active low) Open-drain output indicating that channel 3 has remained in current limit long
FLT3
19
O
enough to time out the fault timer and shut the channel down. asserted when 3-V fault timer runs out
GNDA
29
—
12-V power ground.
GNDB
9
GNDE
27
GNDN
31
—
Ground.
GNDS
24
IN3
16
I
3-V input. Supply pin for the 3-V channel internal pass FET.
IN12
15
I
12-V input. Supply pin for 12-V channel internal circuitry.
NC
32
—
No connection.
8
Copyright 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS2459
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