TLE82422LXUMA2

The TLE8242-2L IC is an eight channel low-side constant current control pre-driver IC. Each channel can be configured to function either in direct PWM mode or in constant current mode by setting the appropriate CM bit in SPI message #1.

Summary of Features

• Low side constant current control pre-driver integrated circuit
• Four independent channels
• Output current programmable with 11 bit resolution
• Current range = 0 to 1.2A (typ.) with a 0.2Ohm sense resistor
• Resolution = 0.78125 mA/bit (typ.) with a 0.2Ohm
• sense resistor
• +/- 2% full scale error over temperature when autozero is used
• Programmable PWM frequency via SPI from approximately 50 Hz to 4 KHz (typ.)
• Interface and Control
• 32 Bit SPI (Serial Peripheral Interface) - Slave only
• ENABLE pin to disable all channels or freeze all channels
• Active low RESET_B pin resets internal registers to their default state and disables all channels.
• Open drain FAULT pin can be programmed to transition low when various faults are detected.
• 5.0V and 3.3V logic compatible I/O
• Protection
• Over current shutdown - monitored at POSx pin.
• Programmable over current threshold
• Programmable over current delay time
• Programmable over current retry time
• Battery pin (BAT) overvoltage shutdown

Benefits

• Sense resistor can be scaled to expand solenoid current range above 1.2A
• Minimal protection circuitry can be added in order to use the TLE8242-2L in 24V applications (commercial vehicles)
• Current profile detection feature can be use to determine movement of the solenoid armature

Target Applications

• Variable Force Solenoids (e.g. automatic transmission solenoids)
• Other constant current solenoids
• Idle Air Control
• Exhaust Gas Recirculation
• Vapor Management Valve
• Suspension Control