AN4373 Datasheet, PDF (1/14 Pages) STMicroelectronics – Galvanically-isolated 8 channel high-side driver based on the ISO8200B

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
contains 2 independent galvanic isolated voltage domains (V_CC for the power stage and
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.
October 2013
DocID025365 Rev 1
1/14
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