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This new device from Infineon is a self-contained IC for controlling solenoid valves. The TLE7241 addresses the challenging control requirements of proportional control solenoid valves often used in hydraulic controls.

Each device contains 2 independent channels capable of regulating current from 0 to 1 Amp with 1.2mA resolution. Each channel provides a current accuracy of ±2% over the full operating range (temp, voltage). The device also offers the capability of superimposing a triangular dither waveform to reduce mechanical friction effects of the valve.

Multiple protection and diagnostic features are included in order to meet stringent system level failure management requirements.

Control module component count and microcontroller software complexity are both reduced when using this device compared to a "roll your own" solution using discrete devices.

Features:

• Dual 1 Amp channel current regulator

• ±2% accuracy

• Controlled via standard SPI bus

• Simple to apply

• Multiple protection and diagnostic features

• RoHS compliant

Applications:

• Proportional control solenoid valve control

• Hydraulic control modules

• Automatic transmissions

• Active suspension

Benefits:

• Fewer components compared to discrete circuit solutions

• Requires little software overhead

• Great accuracy without module level trimming or calibration

• Current range can be extended by adding external transistors

• Unique product with few competitors