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参数资料
| 型号： | TPS2015DR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHED CAPACITOR CONVERTER, PDSO8 |
| 封装： | GREEN, PLASTIC, SOIC-8 |
| 文件页数： | 8/26页 |
| 文件大小： | 558K |
| 代理商： | TPS2015DR |
TPS2014, TPS2015
POWER DISTRIBUTION SWITCHES
SLVS159C DECEMBER 1996 REVISED MARCH 2004
16
TI.COM
APPLICATION INFORMATION
Figure 24. Typical Application
OUT
2
3
5
4
EN
OC
IN
7
8
6
22
F
0.1
F
10 k
Power Supply
4 V 5 V
Overcurrent Output
Load Enable
TPS2014
External Load
1
GND
0.1
F
+
power supply considerations
The TPS20xx has multiple inputs and outputs that must be connected in parallel to minimize voltage drop and
prevent unnecessary power dissipation.
A 0.1-
F ceramic bypass capacitor between IN and GND, close to the device, is recommended. A high-value
electrolytic capacitor is also desirable when the output load is heavy or has large paralleled capacitors.
Bypassing the output with a 0.1-
F ceramic capacitor improves the immunity of the device to electrostatic
discharge (ESD).
overcurrent
A sense FET is employed to check for overcurrent conditions. Unlike sense resistors and polyfuses, sense FETs
do not increase series resistance to the current path. When an overcurrent condition is detected, the device
maintains a constant output current and reduces the output voltage accordingly. Shutdown only occurs when
the fault is present long enough to activate thermal limiting.
Three possible overload conditions can occur. In the first condition, the output has been shorted before the
device is enabled or before VI(IN) has been applied (see Figures 7 and 8). The TPS20xx senses the short and
immediately switches into a constant-current output.
Under the second condition, the short occurs while the device is enabled. At the instant the short occurs, very
high currents flow for a short time before the current-limit circuit can react (see Figures 3 and 4). After the
current-limit circuit has tripped, the device limits normally.
Under the third condition, the load has been gradually increased beyond the recommended operating current.
The current is permitted to rise until the current-limit threshold is reached (see Figures 5 and 6). The TPS20xx
is capable of delivering current up to the current-limit threshold without damage. When the threshold has been
reached, the device switches into its constant-current mode.
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| TPS2041BDGNR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
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| TPS2015P | 功能描述:电源开关 IC - USB SINGLE HI-SIDE MOSFET RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| TPS2015PE4 | 功能描述:电源开关 IC - USB SINGLE HI-SIDE MOSFET RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| TPS201XA | 制造商:TI 制造商全称:Texas Instruments 功能描述:CURRENT-LIMITED, POWER-DISTRIBUTION SWITCHES |
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