MAX1838

更新时间： 2024-10-02 21:55:19

品牌	Logo	应用领域
美信 - MAXIM		开关
页数	文件大小	规格书
12页	639K
描述
Dual USB Switch with Fault Blanking and Autoreset

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数据手册

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MAX1838 数据手册

19-2033; Rev 0; 4/01

Dual USB Switch with Fault Blanking

and Autoreset

General Description

Features

The MAX1838 is a dual, current-limited USB switch with

auxiliary input supply. Each switch meets all IEC speci-

fications for USB ports and is guaranteed to supply

500mA from either of two input supplies. A control pin

selects the power source from either the main or auxil-

iary supply.

ꢀ Dual USB Switch with Auxiliary Input

ꢀ Autoreset from Fault Condition

ꢀ Guaranteed 500mA Load per Channel

ꢀ Programmable Current Limits on Auxiliary Inputs

ꢀ Reverse Current Protection

The MAX1838 has multiple protection features, includ-

ing independent thermal-shutdown on each channel to

limit junction temperature in case of a prolonged short

or overload condition. The device has accurate internal

current-limit and reverse-current protection to safe-

guard the input supply against overload. When pow-

ered from the auxiliary supply, the current limit on each

channel is set independently with an external resistor.

ꢀ Thermal Overload Protection

ꢀ Built-In 20ms Fault-Blanking

ꢀ 4V to 5.5V Range

ꢀ Independent FAULT Indicator Outputs

ꢀ UL Listing Pending

An autoreset feature latches the switch off if the output

is shorted, thereby saving system power. When the

short is removed, the switch automatically turns back

on. Independent fault signals (FAULTA and FAULTB)

notify the microprocessor (µP) that the internal current

limit has been reached. A 20ms fault-blanking feature

prevents the MAX1838 from issuing false alarms to the

host during power-up or when hot-swapping into a

capacitive load.

Ordering Information

PART

TEMP. RANGE

PIN-PACKAGE

MAX1838EEE

-40°C to +85°C

16 QSOP

The MAX1838 is available in a space-saving 16-pin

QSOP. For other USB current-limited switches, refer to

the MAX1693, MAX1694, MAX1812, and MAX1823.

Applications

Desktops

Typical Operating Circuit

Notebook Computers

USB Ports

Docking Stations

Pin Configuration

AUX

AUXA

AUXB

FAULTB

FAULTA

TOP VIEW

GND

SEL

16 FAULTA

15 ADJA

MAX1838

OUTB

OUTA

INA

INB

OUTB

10µF

AUXA

INA

14 OUTA2

13 OUTA1

12 OUTB2

11 OUTB1

10 ADJB

MAX1838

SEL

OUTA

INB

ADJB

ADJA

AUXB

GND

FAULTB

QSOP

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...12

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与MAX1838相关器件

型号	品牌	获取价格	描述	数据表
MAX1838_10	MAXIM	获取价格	Dual USB Switch with Fault Blanking and Autoreset
MAX1838EEE	MAXIM	获取价格	Dual USB Switch with Fault Blanking and Autoreset
MAX1838EEE+	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INCH PTI
MAX1838EEE+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INCH PTI
MAX1838EEE-T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, PDSO16, 0.150 INCH, 0.025 INCH PTI
MAX1839	MAXIM	获取价格	Wide Brightness Range CCFL Backlight Controllers
MAX1839EEP	MAXIM	获取价格	Wide Brightness Range CCFL Backlight Controllers
MAX1839EEP+	MAXIM	获取价格	Fluorescent Light Controller, 64kHz Switching Freq-Max, PDSO20, 0.150 INCH, 0.025 INCH PIT
MAX1839EEP-T	MAXIM	获取价格	Fluorescent Light Controller, 64kHz Switching Freq-Max, PDSO20, 0.150 INCH, 0.025 INCH PIT
MAX1839EUP	MAXIM	获取价格	Fluorescent Light Controller, Current-mode, 64kHz Switching Freq-Max, PDSO20, 0.150 INCH,

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