PAC1934-I/JQ

Current Regulation/Management Overview

The PAC1934-I/JQ is a four-channel DC power monitor IC manufactured by Microchip Technology. It features high-side current sensing with a 100mV full-scale voltage range and 16-bit resolution. The device supports bidirectional current sensing from -100mV to +100mV. It operates on a supply voltage of 2.7V to 5.5V, with digital I/O supporting 1.62V to 5.5V. Accuracy is maintained at 1% across a wide dynamic range through real-time auto-calibration. It utilizes SMBus 3.0 and I2C Fast Mode+ (1Mb/s) interfaces. The component is housed in a 4.0mm x 4.0mm UQFN package.

Current Regulation/Management Feature Summary

• Four-channel power and energy monitoring with 16-bit resolution for current and voltage measurements
• Real-time automatic calibration minimizes offset and gain errors without user adjustment
• Supports bidirectional current sensing and wide bus voltage input ranges up to 32V
• On-chip accumulation registers store power data for extended integration periods

Current Regulation/Management Applications

• High-side power and energy monitoring in multi-rail systems
• Battery management and fuel gauging applications
• Embedded controller power regulation verification
• Industrial equipment power consumption tracking

Current Regulation/Management Procurement Notes

Verify the specific suffix JQ corresponds to the UQFN-16 package variant when sourcing. Confirm the industrial temperature grade (-40°C to +85°C) matches system requirements. Ensure interface compatibility with the host controller's SMBus or I2C specifications. Check RoHS compliance status against local regulatory standards before finalizing procurement orders.

Current Regulation/Management Selection Notes

Select this component for applications requiring precise multi-channel power monitoring with minimal external filtering. The integrated auto-calibration reduces design complexity compared to devices requiring manual offset correction. Consider the UQFN package size for space-constrained PCB layouts. Verify that the required channel count aligns with the four available inputs, as other variants offer different channel counts.

Current Regulation/Management Part Context

The PAC1934 belongs to Microchip's family of multi-channel power monitors, which includes the two-channel PAC1932 and three-channel PAC1933. These devices share similar architectures featuring high-side sensing and digital power calculation. The PAC1934 specifically provides four independent channels, making it suitable for complex systems requiring comprehensive power distribution analysis.

Current Regulation/Management Replacement Considerations

The PAC1932 and PAC1933 are functionally similar but offer fewer channels. Direct pin-to-pin replacement is not guaranteed due to package differences between UQFN and WLCSP options within the same series. Verify register compatibility if migrating between PAC193x variants.