power management product selection guide - International Rectifier
power management product selection guide - International Rectifier
power management product selection guide - International Rectifier
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Automotive Intelligent Power Switch | PRODUCT FAMILIES<br />
Features at a Glance<br />
• Integrated charge pump and gate drive<br />
for high-side applications<br />
• Load current feedback<br />
• Programmable over-current shutdown<br />
• Over-temperature shutdown<br />
• Active clamp<br />
• Reverse battery protection<br />
• Reverse current capability<br />
Current feedback<br />
Input<br />
On<br />
Off<br />
10k<br />
IN<br />
Ifb<br />
Rifb<br />
Logic<br />
Ground<br />
IR331x<br />
Power<br />
Ground<br />
Vcc<br />
OUT<br />
Load<br />
Battery<br />
• ESD protection<br />
The IR Advantage<br />
• +/- 5% current sense feedback accuracy<br />
• 100 kHz current feedback bandwidth<br />
• Very low R DS(ON) fully protected<br />
high-side switch<br />
• Programmable current shutdown<br />
• Simplifies circuits and increases<br />
reliability<br />
Applications<br />
• Automotive 14V applications<br />
• Body modules<br />
• Intelligent Glow-plug<br />
• Auxiliary PTC heater<br />
• Engine cooling fan<br />
• Interior fan control<br />
The IR331x family are highly efficient high side <strong>power</strong> switches that feature integrated programmable<br />
over-current protection, over-temperature protection, and active overvoltage clamping.<br />
In addition, the IR331x family provides a current feedback output with +/- 5% accuracy over the<br />
full operating temperature range (@max. load current) compared to about +/-20% for competitive<br />
devices. This accuracy combined with integrated programmable over-current shutdown<br />
enables the IR331x switches to protect not only itself but also the load by optimizing the shutdown<br />
threshold.<br />
The current feedback feature allows precise current monitoring and control for a very cost effective<br />
solution in many applications. With +/- 5% accuracy and 100 kHz bandwidth, the current<br />
feedback signal may be used by a standard PWM control IC, ASIC, or microcontroller to implement<br />
high-performance functionality from wide bandwidth closed-loop current control of a<br />
motor load to basic load fault detection. Implementing current sense functions with the IR331x<br />
family eliminates the <strong>power</strong> loss of a shunt resistor or cost of a Hall sensor.<br />
The IR331x devices are specifically designed for automotive 14V applications where a protection<br />
is required in order to prevent the IC and the application from damage in case of short circuits<br />
on the line, or by overload. The integrated over-temperature protection and programmable overcurrent<br />
shutdown features save additional fuses and wiring harness, improving the system reliability.<br />
Additional integrated features like ESD, reverse battery and active clamp guarantee protection<br />
even under harsh automotive operating conditions.<br />
www.irf.com INTERNATIONAL RECTIFIER / POWER MANAGEMENT SELECTION GUIDE 39
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