October 2013

DocID025365 Rev 1

1/14

AN4373

Application note

Galvanically-isolated 8 channel high-side driver

based on the ISO8200B

By Massimo Oteri

Introduction

The STEVAL-IFP015V2 product evaluation board works in combination with the STEVAL-

PCC009V2 interface board to allow evaluation of all the features of the ISO8200B device. A

large GND area on the printed circuit board has been designed to minimize noise effects

and ensure good thermal performance.

The ISO8200B is a galvanic isolated 8 channel driver featuring a very low supply current. It

VDD for the digital stage). The IC is intended to drive any type of load with one side

connected to ground. Active channel current limitation combined with thermal shutdown,

independent for each channel, and automatic restart protect the device against overload.

Additional embedded functions are: loss of GND protection which automatically turns off the

outputs in case of analog ground, undervoltage shutdown with hysteresis, and reset function

for immediate power output shutdown.

Built-in thermal shutdown protects the chip against overtemperature and short-circuit. In

overload condition, the channel turns off, then back on automatically after the IC

temperature has decreased below a reset threshold. If this condition causes the case

temperature to reach the TCR limit, the overloaded channel is turned off and will restart only

when case and junction temperature have decreased down to the reset threshold. Non

overloaded channels continue to operate normally.

An internal circuit provides an OR-wired non latched common FAULT indicator signaling

channel OVT. The FAULT pin is an open-drain active-low fault indication pin.

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