The TLE7242-2G IC is a four channel low-side constant current control pre-driver IC
Each channel can be configured to function either in on/off mode or in constant current mode by setting the appropriate MODE bit in SPI message #7.
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 TLE7242-2G in 24V applications (commercial vehicles)
Potential Applications
Variable Force Solenoids (e.g. automatic transmission solenoids)
Other constant current solenoids
Idle Air Control
Exhaust Gas Recirculation
Vapor Management Valve
Suspension Control
The TLE7242-2G IC is a four channel low-side constant current control pre-driver IC
Each channel can be configured to function either in on/off mode or in constant current mode by setting the appropriate MODE bit in SPI message #7.
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 TLE7242-2G in 24V applications (commercial vehicles)
Potential Applications
- Variable Force Solenoids (e.g. automatic transmission solenoids)
- Other constant current solenoids
- Idle Air Control
- Exhaust Gas Recirculation
- Vapor Management Valve
- Suspension Control
