Microchip Technology PAC1932, PAC1933, PAC1934 Power Monitor ICs

Microchip Technology PAC1932, PAC1933, and PAC1934 Power Monitor ICs (PMICs) are multi-channel power and energy monitoring devices. The PAC1932 is a dual-channel power and energy monitor, the PAC1933 features three channels, and the PAC1934 is a quad-channel power monitor. A high-voltage multiplexer sequentially connects the inputs to a bus voltage monitor and current sense amplifier that feed high-resolution ADCs. Digital circuitry performs power calculations and energy accumulation.

The PAC1932, PAC1933, and PAC1934 PMICs offer energy monitoring with integration periods from 1ms up to 36 hours or longer. Bus voltage, sense resistor voltage, and accumulated proportional power are stored in registers for retrieval by the system master or Embedded Controller.

The sampling rate and energy integration period of these PMICs can be controlled over SMBus or I²C. Active channel selection, one-shot measurements and other controls are also configurable by SMBus or I²C.

The PAC1932, PAC1933, and PAC1934 PMICs use real-time calibration to minimize offset and gain errors. No input filters are required for these devices.

Features

High-side power and energy monitors
Channels
- PAC1932: 2 channels
- PAC1933: 3 channels
- PAC1934: 4 channels
100 mV full scale range for current sense voltage, 16 bit resolution
Selectable bidirectional current sense capability, -100mV to +100mV range
External sense resistor sets full scale current range
Very low input current simplifies routing
Wide Bus Voltage Range for Voltage Monitor
- 0V to 32V input common-mode voltage
- 16 bit resolution for voltage measurements
- 14 bits used for power calculations
Real Time Auto-Calibration of Offset and Gain Errors for Voltage and Current, No User Adjustment Required
1% Power Measurement Accuracy over a Wide Dynamic Range
ALERT Features that can be Enabled:
- ALERT on accumulator overflow
- ALERT on Conversion Complete

On-Chip Accumulation of 28-bit Power Results for Energy Measurement
- 48-bit power accumulator register for recording accumulated power data
- 24 bit Accumulator Count
- User programmable sampling rates of 8, 64, 256, and 1024 samples per second
- 17 minutes of power data accumulation minimum at 1024 samples per second
- Over 36 hours of power data accumulation minimum at 8 samples per second
2.7V to 5.5V Supply Operation
- Separate V_DD I/O pin for digital I/O
- 1.62V to 5.5V capable SMBus and digital I/O
- SMBus 3.0 and I2C Fast Mode Plus (1Mb/S)
SMBus Address: 16 Options, set with Resistor
No Input Filters Required
Package options:
- 4.0mm x 4.0mm UQFN Package (PAC1932, PAC1933, PAC1934)
- 2.225mm x 2.17mm WLCSP Package (PAC1934 only)