Product category:
Power Supply ICs and Controllers
News Release from: AMI Semiconductor | Subject: AMIS-70050
Edited by the Electronicstalk Editorial
Team on 22 October 2004
One driver covers most automotive
applications
A new high-side driver IC is designed to drive virtually any load in microcontroller-based automotive and industrial control applications.
A new high-side driver IC is designed to drive virtually any load in microcontroller-based automotive and industrial control applications The AMIS-70050 octal high-side driver IC significantly reduces the need for other power management components by providing a medium-current single-chip solution to the interface between a 3.3 or 5.0V host microcontroller and virtually any physical load including transistors, relays, solenoids and LEDs
This article was originally published on Electronicstalk on 26 Mar 2001 at 8.00am (UK)
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AMI Semiconductor's new IC integrates a three-wire SPI interface, eight high-side driver switches with flyback diodes, and comprehensive protection and diagnostic functionality into a single 28-pin thermally enhanced SOIC package.
As a result, the AMIS-70050 is ideal for automotive load management and dashboard applications and a number of other automotive and industrial designs where actuator control, LED indication, and relay and solenoid operation are controlled by a microcontroller.
The AMIS-70050 is fully compatible with both 3.3 and 5.0V microcontrollers.
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The SPI interface, rather than the standard parallel interface used in most other manufacturers' parts, allows more comprehensive control and diagnostic information to be passed between the microcontroller and the AMIS-70050.
An integrated charge pump which uses one low cost external capacitor drives the gate voltage for the integrated high side driver transistors so that a low on-resistance is guaranteed.
Consequently thermal runaway is avoided, even at low battery voltage.
Each of the high side driver switches have integrated fly-back diodes and can deliver up to 415mA of continuous current (with all drivers active).
As a consequence, the AMIS-70050 can drive all common types of loads such as relays, solenoids and LEDs without any additional driver circuitry.
The IC can also be used to drive PWM signals for motor control applications.
The design of the AMIS-70050 is very robust making the device ideal for harsh automotive and industrial environments.
Use of AMI Semiconductor's' proven I2T100 high voltage technology ensures excellent protection against erroneous situations including short-circuit conditions and ground loss.
Furthermore, the device features a built-in diagnostic circuit that continuously monitors the states of the driver outputs.
Finally, a thermal shutdown function prevents circuit damage in the event of excessive drive currents and excessive ambient temperatures.
Discussing the launch of the AMIS-70050, AMI Semiconductor's Bob Klosterboer, Senior Vice President for Integrated Mixed-Signal Products, comments: "This device solves many issues the automotive and industrial designers have been facing with the existing generation of products".
"The AMIS-70050 combines a much better microcontroller interface, significantly higher current handling capabilities than many existing driver ICs, and a very robust design that is dedicated to harsh automotive and industrial environments".
"Thanks to the levels of integrated functionality and protection, we anticipate high levels of interest in this part from the foremost and most demanding automotive and industrial customers".
In addition to the standard part, AMIS can also design and manufacture custom parts based on the AMIS-70050 technology.
The AMIS-70050 is priced at $1.99 per device for quantities in excess of 5000 pieces.
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