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TLE8242-2 Datasheet(PDF) 5 Page - Infineon Technologies AG |
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TLE8242-2 Datasheet(HTML) 5 Page - Infineon Technologies AG |
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5 / 78 page  Data Sheet 5 Rev. 1.0, 2010-02-09 TLE8242-2 Overview • Diagnostics – Over current – Open load in on state – Open load in off state – Short to ground – Test complete bit - indicates that fault detection test has completed • Control loop monitor capabilities – The average current measurement over the last completed dither cycle for a selected channel can be accessed via SPI – The minimum and maximum current measurements over the last completed dither cycle for a selected channel can be accessed via SPI. This data can be used to measure the achieved dither amplitude – The duty cycle of each channel can be accessed via SPI – The auto zero values used to cancel the offsets of the input amplifiers can be accessed via SPI • Required External Components: – N-Channel Logic level (5V) MOSFET transistor with typical Ron ≤ 100 mΩ (e.g. SPD15N06S2L-64) – Recirculation diode (ultrafast) – Sense resistor (0.2 Ω for 1.2A average output current range) • Green Product (RoHS compliant) • AEC Qualified 1.2 Applications • Variable Force Solenoids (e.g. automatic transmission solenoids) • Other constant current solenoids – Idle Air Control – Exhaust Gas Recirculation – Vapor Management Valve – Suspension Control 1.3 General Description The TLE8242G IC is an eight channel low-side constant current control predriver 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. 1.3.1 Direct PWM Mode Operation For Direct PWM operation, the POSx and NEGx pins must be connected to the circuit in either of the configurations shown in Figure 1. If the sense resistor is included, the load current can be monitored by the microcontroller via a SPI command. The open load in on state fault detection feature is disabled in direct PWM mode. Note: An external flyback clamp is required in this configuration otherwise the IC may be damaged. |
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