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Microchip微芯 PAC1944 产品介绍
2026-04-14
0次
说明
PAC1944是一款四电源监视器和能量监视器，可报告总线电压和感应电压，分辨率为16位。功率被报告为两个16位独立总线和感测电压的同时乘积。所有寄存器都可以通过I2C/SMBus访问，包括用于读取稳定性的8个样本平均值。该设备可以检测每个通道的过电压/欠电压、过电流/欠电流和过功率，并生成警报输出。
特性
- High-Side Current Monitor with Four Channels
- 100 mV Full-Scale Range (configurable to 50mV)
- External Sense Resistor Sets the Full-Scale Current Range
- Voltage Monitor with Wide VBUS Range
- 0V to 9V FSR (configurable to 4.5V)
- 16-bit Resolution
- Real-Time Auto-Calibration of Offset Error for Voltage and Current
- 1% Power Measurement Accuracy over a Wide Dynamic Range
- On-Chip Accumulation of 30-bit Power Results for Energy Measurement
- User Programmable Sampling Rates of 8, 64, 256 and 1024 SPS
- 5120 SPS for a Single Channel in Burst Mode
- 2.7V to 5.5V Supply Operation
- 1.62-5.5V Capable I2C/SMBus and Digital I/O
- SMBus 3.1 and I2C Fast Mode Plus, 1 Mbps
- High-Speed Mode (3.4 Mbps)
- Two Independent ALERT/GPIO pins
- ALERT on Over/Undervoltage and Current or Overpower Conditions
- Coulomb Counting: When Selected, the Accumulator Accumulates VSENSE Values
参数
类型 | 描述 |
Description | Quad DC Power/Energy Monitor with Accumulator |
Vsense min FSR (mV) | -100 |
Vsense max FSR (mV) | 50, 100 |
Vsense accuracy (% FSR, max) | 0.5 |
Vbus Range min (V) | 0 |
Vbus Range max (V) | 9 |
Vbus accuracy (% FSR, max) | 0.25 |
Sampling Interval min (msec) | 0.2 |
Remote Temperature Monitors | 0 |
# Ambient Temperature Monitors | 0 |
Temperature Accuracy Typical (°) | 0 |
Temperature Accuracy Max (°) | 0 |
Alert/Therm | 2 |
Accumulator? | Yes |
Interface | SMBus/I2C |
Address Select | 16 |
# Current Channel | 4 |
ADC Resolution (bit) | 16 |
