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TPS2046_14

更新时间： 2024-09-21 02:58:43
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德州仪器 - TI /
页数 文件大小 规格书
23页 412K
描述
DUAL CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES

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TPS2046, TPS2056  
DUAL CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES  
SLVS183 – APRIL 1999  
features  
typical applications  
135-mΩ -Maximum (5-V Input) High-Side  
MOSFET Switch  
Notebook, Desktop and Palmtop PCs  
Monitors, Keyboards, Scanners, and  
Printers  
250 mA Continuous Current per Channel  
Independent Short-Circuit and Thermal  
Protection With Overcurrent Logic Output  
Digital Cameras, Phones, and PBXs  
Hot-Insertion Applications  
Operating Range . . . 2.7-V to 5.5-V  
Logic-Level Enable Input  
2.5-ms Typical Rise Time  
TPS2046  
D OR P PACKAGE  
(TOP VIEW)  
TPS2056  
D OR P PACKAGE  
(TOP VIEW)  
Undervoltage Lockout  
10 µA Maximum Standby Supply Current  
Bidirectional Switch  
GND  
IN  
OC1  
GND  
IN  
OC1  
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
OUT1  
OUT2  
OC2  
OUT1  
OUT2  
OC2  
Available in 8-pin SOIC and PDIP Packages  
Ambient Temperature Range, –40°C to 85°C  
EN1  
EN2  
EN1  
EN2  
2-kV Human-Body-Model, 200-V  
Machine-Model ESD Protection  
description  
The TPS2046 and TPS2056 dual power-distribution switches are intended for applications where heavy  
capacitive loads and short circuits are likely. These devices incorporate in single packages two 135-mΩ  
N-channel MOSFET high-side power switches for power-distribution systems that require multiple power  
switches. Each switch is controlled by a logic enable compatible with 5-V and 3-V logic. Gate drive is provided  
by an internal charge pump that controls the power-switch rise times and fall times to minimize current surges  
during switching. The charge pump requires no external components and allows operation from supplies as low  
as 2.7 V.  
When the output load exceeds the current-limit threshold or a short is present, the TPS2046 and TPS2056 limit  
the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic  
output low. When continuous heavy overloads and short circuits increase the power dissipation in the switch  
causingthejunctiontemperaturetorise, athermalprotectioncircuitshutsofftheswitchinovercurrenttoprevent  
damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal  
circuitry ensures the switch remains off until valid input voltage is present.  
The TPS2046 and TPS2056 are designed to limit at 0.44-A load. These power distribution switches, available  
in 8-pin small-outline integrated circuit (SOIC) and 8-pin plastic dual-in-line packages (PDIP), operate over an  
ambient temperature range of –40°C to 85°C.  
AVAILABLE OPTIONS  
RECOMMENDED  
MAXIMUM CONTINUOUS  
LOAD CURRENT  
(A)  
TYPICAL  
SHORT-CIRCUIT CURRENT  
LIMIT AT 25°C  
PACKAGED DEVICES  
T
A
ENABLE  
SOIC  
PDIP  
(P)  
†
(D)  
(A)  
–40°C to 85°C Active low  
–40°C to 85°C Active high  
0.25  
0.25  
0.44  
0.44  
TPS2046D TPS2046P  
TPS2056D TPS2056P  
†
The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2046DR)  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 1999, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...23

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