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主要特征
应用/用途
Parametric specs for Current Limit and USB Power Switches
Current Limit (mA) (min) | 720 |
Current Limit (mA) (max) | 720 |
# Power Switches | 2 |
USB | Yes |
Fault Indicator | Yes |
Current Limit Accuracy (%) | 25 |
Current Limit Set By | Preset |
RON (Ω) (typ) | 0.075 |
VSUPPLY (V) (min) | 4 |
VSUPPLY (V) (max) | 5.5 |
Oper. Temp. (°C) | -40 to +85 |
Package/Pins | See Data Sheet |
缩小
简化框图
Technical Docs
数据资料 | 双路、USB开关,带有故障屏蔽及自复位功能 | Nov 11, 2003 |
支持和培训
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参量
Parametric specs for Current Limit and USB Power Switches
Current Limit (mA) (min) | 720 |
Current Limit (mA) (max) | 720 |
# Power Switches | 2 |
USB | Yes |
Fault Indicator | Yes |
Current Limit Accuracy (%) | 25 |
Current Limit Set By | Preset |
RON (Ω) (typ) | 0.075 |
VSUPPLY (V) (min) | 4 |
VSUPPLY (V) (max) | 5.5 |
Oper. Temp. (°C) | -40 to +85 |
Package/Pins | See Data Sheet |
主要特征
- Dual USB Switch in Tiny 10-Pin µMAX Package
- Autoreset Feature Saves Power
- Guaranteed 720mA Load per Channel
- Built-In 20ms Fault Blanking
- Compliant to USB Specification
- Blocks Reverse Current in Shutdown (MAX1823A/MAX1823B)
- 4V to 5.5V Input Voltage Range
- Independent Shutdown Control
- (MAX1823/MAX1823A—Active Low)
- (MAX1823B/MAX1823H—Active High)
- Independent active-low FAULT Indicator Outputs
- Thermal-Overload Protection
- 50µA Quiescent Current (Both Switches On)
- 3µA Standby Current
应用/用途
- 坞站
- 笔记本电脑与台式计算机
- PDA与掌上电脑
- USB端口和集线器
描述
The MAX1823 is a dual, current-limited switch with autoreset specifically made for USB applications. The autoreset feature latches the switch off if the output is shorted, saving system power. The switch reactivates when the short circuit is removed. Each channel is guaranteed to supply 720mA and meet USB specifications. Low quiescent supply current (50µA) and standby current (3µA) conserve battery power in portable applications.
The MAX1823 has multiple safety features to ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperature. Accurate internal current-limiting circuitry protects the input supply against both overload and short-circuit conditions. Independent fault signals (active-low FAULTA and active-low FAULTB) notify the microprocessor (µP) when a thermal-overload, current-limit, undervoltage-lockout (UVLO), or short-circuit fault occurs. A 20ms fault-blanking feature ignores momentary faults, such as those caused when hot swapping a capacitive load, preventing false alarms to the host system. The MAX1823A/MAX1823B also block reverse current (current from OUT_ to IN_) while in shutdown.
The MAX1823 is available in a space-saving 10-pin µMAX® package. The MAX1823/MAX1823A are enabled with an active-low signal, and the MAX1823B/MAX1823H are enabled with an active-high signal. For a single version of this device, refer to the MAX1946 data sheet. For a triple version, refer to the MAX1940 data sheet.
The MAX1823 has multiple safety features to ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperature. Accurate internal current-limiting circuitry protects the input supply against both overload and short-circuit conditions. Independent fault signals (active-low FAULTA and active-low FAULTB) notify the microprocessor (µP) when a thermal-overload, current-limit, undervoltage-lockout (UVLO), or short-circuit fault occurs. A 20ms fault-blanking feature ignores momentary faults, such as those caused when hot swapping a capacitive load, preventing false alarms to the host system. The MAX1823A/MAX1823B also block reverse current (current from OUT_ to IN_) while in shutdown.
The MAX1823 is available in a space-saving 10-pin µMAX® package. The MAX1823/MAX1823A are enabled with an active-low signal, and the MAX1823B/MAX1823H are enabled with an active-high signal. For a single version of this device, refer to the MAX1946 data sheet. For a triple version, refer to the MAX1940 data sheet.
Technical Docs
数据资料 | 双路、USB开关,带有故障屏蔽及自复位功能 | Nov 11, 2003 |
支持和培训
采样:
选择上方“样片”按钮将重定向至第三方ADI样片网站。登录后,所选部件将转移到您在此网站上的购物车。如果您之前从未使用过此网站,请创建一个新帐户。有关此样片网站的任何问题,请联系SampleSupport@analog.com。