MyMaxim 订阅产品详情
主要特征
应用/用途
| VSENSE_FS (mV) (recomm.) | 150 |
| VOS @25°C (µV) (max) | 750 |
| Output Format | Current |
| CMVR (V) (min) | 0 |
| CMVR (V) (max) | 32 |
| VCC (V) (min) | 3 |
| VCC (V) (max) | 32 |
| ICC (µA) (typ) | 800 |
| Bi-Dir. Curr. Sense | No |
| Gain | 10 µA/mV |
| Gain Accuracy @25°C (%) (max) | 2 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC (N)/8 UMAX/8 |
| Budgetary Price (See Notes) | 2.46 |
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Technical Docs
参量
| VSENSE_FS (mV) (recomm.) | 150 |
| VOS @25°C (µV) (max) | 750 |
| Output Format | Current |
| CMVR (V) (min) | 0 |
| CMVR (V) (max) | 32 |
| VCC (V) (min) | 3 |
| VCC (V) (max) | 32 |
| ICC (µA) (typ) | 800 |
| Bi-Dir. Curr. Sense | No |
| Gain | 10 µA/mV |
| Gain Accuracy @25°C (%) (max) | 2 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC (N)/8 UMAX/8 |
| Budgetary Price (See Notes) | 2.46 |
主要特征
- Ideal for High-Side Monitoring
- 3V to 32V Supply Operation
- ±0.5% Typical Full-Scale Accuracy Over Temperature
- High Accuracy +2V to +32V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage
- 800kHz Bandwidth [VSENSE = 100mV (1C)]
- 200kHz Bandwidth [VSENSE = 6.25mV (C/16)]
- Minimizes Board Space Requirements
- µMAX and SO Packages
应用/用途
- 电池供电应用
- 闭环电池充电器/电流源
- 能量管理
- 便携式PC：笔记本电脑、亚笔记本电脑、掌上电脑
- 便携式测试/测量系统
- 便携式/蜂窝电话
- 智能电池组/充电器
描述
The MAX4172 is a low-cost, precision, high-side current-sense amplifier for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical. High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with the battery charger's ground path. Wide bandwidth and ground-sensing capability make the MAX4172 suitable for closed-loop battery-charger and general-purpose current-source applications. The 0 to 32V input common-mode range is independent of the supply voltage, which ensures that current-sense feedback remains viable, even when connected to a battery in deep discharge.
To provide a high level of flexibility, the MAX4172 functions with an external sense resistor to set the range of load current to be monitored. It has a current output that can be converted to a ground-referred voltage with a single resistor, accommodating a wide range of battery voltages and currents.
An open-collector power-good output (active-low PG) indicates when the supply voltage reaches an adequate level to guarantee proper operation of the current-sense amplifier. The MAX4172 operates with a 3.0V to 32V supply voltage, and is available in a space-saving, 8-pin µMAX® or SO package.
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