Data Sheet, Rev. 1.1, May 2011 TLE7242-2G 4 Channel Fixed Frequency Constant Current Control IC Automotive Power TLE7242-2G Table of Contents Table of Contents Table of Contents 2 1 Overview . 3 1.1 Features 3 1.2 Applications . 4 1.3 General Description . 4 1.3.1 On / Off Mode Operation 4 1.3.2 Constant Current Mode Operation . 5 2 Block Diagram . 9 3 Pin Configuration . 10 3.1 Pin Assignment . 10 3.2 Pin Definitions and Functions . 10 4 General Product Characteristics . 12 4.1 Maximum Ratings 12 4.2 Functional Range 13 4.3 Thermal Resistance 13 5 Functional Description and Electrical Characteristics . 14 5.1 Supply and Reference 14 5.2 Input / Output . 15 5.3 Diagnostics . 16 5.3.1 On-State Diagnostics 19 5.3.2 Off-State Diagnostics 20 5.4 Output Driver . 24 5.5 Current Control 24 5.6 Serial Peripheral Interface (SPI) . 25 5.6.1 SPI Signal Description . 26 5.6.2 SPI Message Structure 28 5.6.2.1 SPI Message 0 - IC Version / Manufacturer . 28 5.6.2.2 SPI Message 1 - Main Period Set . 29 5.6.2.3 SPI Message 2 - PWM Offset 30 5.6.2.4 SPI Message 3 - Current Set Point and Dither Amplitude Set 31 5.6.2.5 SPI Message 4 - Dither Period Set 33 5.6.2.6 SPI Message 5 - Control Variable Set (KP and KI) 34 5.6.2.7 SPI Message 6 - Dynamic Threshold Value Set 36 5.6.2.8 SPI Message 7 - On/Off Control and Fault Mask Configuration 38 5.6.2.9 SPI Message 8 - Diagnostic Configuration 40 5.6.2.10 SPI Message 9 - Diagnostic Read . 42 5.6.2.11 SPI Message 10 - Current Read 43 5.6.2.12 SPI Message 11 - Autozero Read . 44 5.6.2.13 SPI Message 12 - Duty Cycle Read . 46 6 Application Information 47 6.1 Further Application Information 47 7 Package Outlines . 48 8 Revision History 49 Data Sheet 2 Rev. 1.1, 2011-05-27