Datasheet 搜索 > 负载控制器 > TI（德州仪器） > TPS2052BDR 数据手册 > TPS2052BDR 数据手册 18/51 页
器件3D模型￥ 1.859
TPS2052BDR 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
负载控制器
封装:
SOIC-8
描述:
TEXAS INSTRUMENTS TPS2052BDR 芯片, 限流配电开关, 5.5V 8-SOIC, 整卷
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
典型应用电路图在P18
原理图在P5P6P8P10
封装尺寸在P30P31P32P33P35P36P37
标记信息在P30P31P32P33P34
封装信息在P2P30P31P32P33P34P35P36P37
技术参数、封装参数在P2
应用领域在P1P20P27P34P51
电气规格在P3P4
导航目录
TPS2052BDR数据手册
Page:
of 51 Go
若手册格式错乱，请下载阅览PDF原文件
IN
OC1
EN1
OC2
2
8
5
7
0.1 µF 22 µF
0.1 µF 22 µF
Load
Load
OUT1
OUT2
Power Supply
2.7 V to 5.5 V
6
EN2
3
4
GND
0.1 µF
TPS2042B
1
TPS2041B, TPS2042B
TPS2043B, TPS2044B, TPS2051B
TPS2052B, TPS2053B, TPS2054B
SLVS514L –JUNE 2010–REVISED JUNE 2011
www.ti.com
APPLICATION INFORMATION
POWER-SUPPLY CONSIDERATIONS
Figure 31. Typical Application (Example, TPS2042B)
A 0.01-μF to 0.1-μF ceramic bypass capacitor between IN and GND, close to the device, is recommended.
Placing a high-value electrolytic capacitor on the output pin(s) is recommended when the output load is heavy.
This precaution reduces power-supply transients that may cause ringing on the input. Additionally, bypassing the
output with a 0.01-μF to 0.1-μF ceramic capacitor improves the immunity of the device to short-circuit transients.
OVERCURRENT
A sense FET is employed to check for overcurrent conditions. Unlike current-sense resistors, sense FETs do not
increase the series resistance of the current path. When an overcurrent condition is detected, the device
maintains a constant output current and reduces the output voltage accordingly. Complete shutdown occurs only
if 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 V
I(IN)
has been applied (see Figure 17 through Figure 20). The TPS204xB/TPS205xB
senses the short and immediately switches into a constant-current output.
In the second condition, a short or an overload occurs while the device is enabled. At the instant the overload
occurs, high currents may flow for a short period of time before the current-limit circuit can react. After the
current-limit circuit has tripped (reached the overcurrent trip threshold), the device switches into constant-current
mode.
In 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 or until the thermal limit of the device is
exceeded (see Figure 21 through Figure 24). The TPS204xB/TPS205xB is capable of delivering current up to the
current-limit threshold without damaging the device. Once the threshold has been reached, the device switches
into its constant-current mode.
OC RESPONSE
The OCx open-drain output is asserted (active low) when an overcurrent or overtemperature shutdown condition
is encountered after a 10-ms deglitch timeout. The output remains asserted until the overcurrent or
overtemperature condition is removed. Connecting a heavy capacitive load to an enabled device can cause a
momentary overcurrent condition; however, no false reporting on OCx occurs due to the 10-ms deglitch circuit.
The TPS204xB/TPS205xB is designed to eliminate false overcurrent reporting. The internal overcurrent deglitch
eliminates the need for external components to remove unwanted pulses. OCx is not deglitched when the switch
is turned off due to an overtemperature shutdown.
18 Copyright © 2010–2011, Texas Instruments Incorporated
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
