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參數(shù)資料
| 型號(hào)： | TPS2056P |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | DUAL CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES |
| 中文描述： | 雙限流配電開關(guān) |
| 文件頁(yè)數(shù)： | 1/23頁(yè) |
| 文件大小： | 410K |
| 代理商： | TPS2056P |
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TPS2046, TPS2056
DUAL CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
SLVS183 – APRIL 1999
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
features
135-m
-Maximum (5-V Input) High-Side
MOSFET Switch
250 mA Continuous Current per Channel
Independent Short-Circuit and Thermal
Protection With Overcurrent Logic Output
Operating Range . . . 2.7-V to 5.5-V
Logic-Level Enable Input
2.5-ms Typical Rise Time
Undervoltage Lockout
10
μ
A Maximum Standby Supply Current
Bidirectional Switch
Available in 8-pin SOIC and PDIP Packages
Ambient Temperature Range, –40
°
C to 85
°
C
2-kV Human-Body-Model, 200-V
Machine-Model ESD Protection
typical applications
Notebook, Desktop and Palmtop PCs
Monitors, Keyboards, Scanners, and
Printers
Digital Cameras, Phones, and PBXs
Hot-Insertion Applications
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-m
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
causing the junction temperature to rise, a thermal protection circuit shuts off the switch in overcurrent to prevent
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
SHORT-CIRCUIT CURRENT
LIMIT AT 25
°
C
(A)
PACKAGED DEVICES
TA
ENABLE
SOIC
(D)
PDIP
(P)
–40
°
C to 85
°
C
–40
°
C to 85
°
C
The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2046DR)
Active low
0.25
0.44
TPS2046D
TPS2046P
Active high
0.25
0.44
TPS2056D
TPS2056P
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.
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.
1
2
3
4
8
7
6
5
GND
IN
EN1
EN2
OC1
OUT1
OUT2
OC2
TPS2046
D OR P PACKAGE
(TOP VIEW)
1
2
3
4
8
7
6
5
GND
IN
EN1
EN2
OC1
OUT1
OUT2
OC2
TPS2056
D OR P PACKAGE
(TOP VIEW)
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參數(shù)描述 |
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| TPS2057AD | 功能描述:電源開關(guān) IC - USB Tr .345A 2.7-5.5V Hi RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TPS2057ADG4 | 功能描述:電源開關(guān) IC - USB 0.345A 2.7-5.5V Trpl Hi-Side MOSFET RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
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