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参数资料
| 型号： | MP62340DS-LF |
| 厂商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | ROHS COMPLIANT, MS-012AA, SOIC-8 |
| 文件页数： | 12/12页 |
| 文件大小： | 325K |
| 代理商： | MP62340DS-LF |
MP62340/MP62341 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
MP62340/MP62341 Rev.0.9
www.MonolithicPower.com
9
12/15/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2009 MPS. All Rights Reserved.
DETAILED DESCRIPTION
Over Current
When the load exceeds trip current (minimum
threshold current triggering constant-current
mode) or a short is present, MP62340/MP62341
switches into to a constant-current mode (current
limit value). MP62340/MP62341 will be shutdown
only if the over current condition stays long
enough to trigger thermal protection.
Trigger over current protection for different
overload conditions occurring in applications:
1) The output has been shorted or overloaded
before the device is enabled or input applied.
MP62340/MP62341 detects the short or
overload and immediately switches into a
constant-current mode.
2) A short or an overload occurs after the device
is enabled. After the current-limit circuit has
been tripped (reached the trip current
threshold), the device switches into constant-
current mode. However, high current may
flow for a short period of time before the
current-limit circuit can react.
3）Output current has been gradually increased
beyond the recommended operating current.
The load current rises until the trip current
threshold is reached or until the thermal limit
of the device is exceeded. MP62340/
MP62341 is capable of delivering current up
to the trip current threshold without damaging
the device. Once the trip threshold has been
reached, the device switches into its constant-
current mode.
Flag Response
The FLAG pin is an open drain configuration.
This FAULT will report a fail mode after an 8ms
deglitch timeout. This is used to ensure that no
false fault signals are reported. This internal
deglitch circuit eliminates the need for extend
components. The FLAG pin is not deglitched
during an over temp. or voltage lockout.
Thermal Protection
The purpose of thermal protection is to prevent
damage in the IC by allowing exceptive current to
flow and heating the junction. The die temp. is
internally monitored until the thermal limit is
reached. Once this temp. is reached, the switch
will turn off and allow the chip to cool. The switch
has a built-in hysteresis.
Under-voltage Lockout (UVLO)
This circuit is used to monitor the input voltage to
ensure that the MP62340/MP62341 is operating
correctly. This UVLO circuit also ensures that
there is no operation until the input voltage
reaches the minimum spec.
Enable
The logic pin disables the chip to reduce the
supply current. The device will operate once the
enable signal reaches the appropriate level. The
input is compatible with both COMS and TTL.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MP62340DS-LF-Z | 功能描述:电源开关 IC - 配电 3.3/5V 2-Ch 1A Current Limit Switch RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MP62341DH-1-LF-P | 功能描述:电源开关 IC - 配电 3.3/5V 2-Ch 1A Current Limit Switch RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MP62341DH-1-LF-Z | 功能描述:电源开关 IC - 配电 3.3/5V 2-Ch 1A Current Limit Switch RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MP62341DH-LF-P | 功能描述:电源开关 IC - 配电 3.3/5V 2-Ch 1A Current Limit Switch RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MP62341DH-LF-Z | 功能描述:电源开关 IC - 配电 3.3/5V 2-Ch 1A Current Limit Switch RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
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