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参数资料
| 型号： | TPS2541RTET |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| 封装： | GREEN, PLASTIC, WQFN-16 |
| 文件页数： | 37/37页 |
| 文件大小： | 999K |
| 代理商： | TPS2541RTET |
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SLVSAG2A
– OCTOBER 2010 – REVISED APRIL 2011
PIN DESCRIPTIONS
Pin Descriptions
NAME
PIN
I/O
DESCRIPTION
Power Switch
Input voltage; connect a 0.1-
F or greater ceramic capacitor from IN to GND as close
IN
1
PWR
to the device as possible.
OUT
12
PWR
Power-switch output.
GND
14
PWR
Ground connection; should be connected externally to Power PAD.
Internally connected to GND; used to heat-sink the part to the circuit board traces.
POWERPAD
N/A
Connect to GND plane.
Current-Limit Threholds and Indication
External resistor used to set current-limit threshold when ILIM_SEL is LO;
ILIM0
16
I
recommended 16.9 k
Ω ≤ RILIM ≤ 750 kΩ;
External resistor used to set current-limit threshold when ILIM_SEL is HI;
ILIM1
15
I
recommended 16.9 k
Ω ≤ RILIM ≤ 750 kΩ;
Logic-level input signal used to dynamically change power switch current-limit
ILIM_SEL
4
I
threshold; logic LO selects ILIM0, logic HI selects ILIM1.
Active-low open-drain output, asserted during over-temperature or current limit
FAULT
13
O
conditions.
Input Logic Control Signals
Logic-level control input for turning the power switch and the signal switches on/off.
TPS2540/40A: When EN is low, the device is disabled, the signal and power
EN, DSC
5
I
switches are OFF.
TPS2541: When DSC is low, the device is disabled, the signal and power switches
are OFF and the output (OUT) capacitor is discharged.
CTL1
6
I
Logic-level control inputs for controlling the charging mode and the signal switches.
The TPS2540/40A and TPS2541 use different control line truth tables. With the
CTL2
7
I
TPS2540/40A, the
“000” configuration is used to force a discharge of the output
CTL3
8
I
(OUT) capacitor.
D+/D- Data Line Signals
D- data line to connector, input/output used for hand-shaking with portable
DM_IN
11
I/O
equipment.
D+ data line to connector, input/output used for hand-shaking with portable
DP_IN
10
I/O
equipment.
DM_OUT
2
I/O
D- data line to USB host controller.
DP_OUT
3
I/O
D+ data line to USB host controller.
N/C
9
No connect pin. Can be grounded or left floating.
Copyright
2010–2011, Texas Instruments Incorporated
9
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