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PAC17X0 HIGH-SIDE CURRENT
SENSORS EVALUATION
BOARD USER’S GUIDE
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2015 Microchip Technology Inc. DS50002367A-page 11
Chapter 1. Product Overview
1.1 INTRODUCTION
The PAC17X0 High-Side Current Sensors Evaluation Board provides an easily- accessible
platform to test the various features of the PAC17X0. The System Management Bus
(SMBus) communication is accomplished using a Universal Serial Bus (USB) bridge, which
provides a standard interface for the application code interface. The evaluation board
supports communication with both the PAC1710 and PAC1720 devices that are populated
on the board. The SMBus address of the PAC1710 is set by R4 and the PAC1720 SMBus
address is selectable with the J12 jumper.
1.2 PAC17X0 DEVICE FEATURES
The PAC1710 and PAC1720 are I
2
C/SMBus devices that provide high-side,
bidirectional current sensing with precision voltage measurement capabilities. The
devices are similar, except that the PAC1710 contains one current sensing circuit and
the PAC1720 contains two. Both devices measure the voltage developed across an
external sense resistor to represent the high-side current of a battery or voltage
regulator. They also measure the SENSE+ pin voltage and use these measured values
to present a proportional average power calculation. Current sensing includes Fault
protection. During a Fault, the ALERT pin can be asserted or masked.
The PAC17X0 High-Side Current Sensors Evaluation Board provides users with the
means to exercise device functionality while connected either to target systems
(Sys mode) or while utilizing on-board sources (Demo mode). On-board sources
include bus power, selectable steady-state current, adjustable low-frequency square
wave current signal, and a test current pulse with selectable amplitude and duration.