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Automotive Power

Data Sheet

Rev. 1.5, 2013-07-26

TLE7259-2GE

LIN Transceiver

Summary of content (30 pages)

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TLE7259-2GE LIN Transceiver Data Sheet Rev. 1.
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TLE7259-2GE Table of Contents Table of Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 3.1 3.2 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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LIN Transceiver 1 TLE7259-2GE Overview Features • • • • • • • • • • • • • • • • Single-wire transceiver, pin compatible to the TLE7259-2GU Transmission rate up to 20 kBaud Compliant to LIN specification 1.3, 2.0, 2.1, 2.2 and 2.
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TLE7259-2GE Block Diagram 2 Block Diagram VS 8 7 Supply Output Stage RBUS Bus 6 Driver INH 5V 2 Mode Control Temp.Protection Current Limit EN REN TxD Input 4 Timeout Receiver TxD RTD 1 RxD Filter Wake and Bus Comparator WK 3 Figure 1 Data Sheet 5 GND Filter Block Diagram 4 Rev. 1.
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TLE7259-2GE Pin Configuration 3 Pin Configuration 3.1 Pin Assignment Figure 2 RxD 1 8 INH EN 2 7 VS WK 3 6 BUS TxD 4 5 GND Pin Configuration Note: The pin configuration of the TLE7259-2GE is pin compatible to the devices TLE7259G, TLE7259-2GU and the Twin LIN Transceiver TLE7269G. In comparison to the TLE7269G, the TLE 7259-2GE has no separate VIO power supply and needs a pull up resistor at the RxD pin.
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TLE7259-2GE Functional Description 4 Functional Description The LIN Bus is a single wire, bi-directional bus, used for in-vehicle networks. The LIN Transceiver TLE7259-2GE is the interface between the microcontroller and the physical LIN Bus (see Figure 15 and Figure 16). The logical values of the microcontroller are driven to the LIN bus via the TxD input of the TLE7259-2GE.
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TLE7259-2GE Functional Description 4.1 Operating Modes Start-Up Power-Up Note 1: TxD: TxD: Note 2: RxD: Strong Pull Down > 1.
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TLE7259-2GE Functional Description The TLE7259-2GE has 3 major operation modes: • • • Stand-By mode Normal Operation mode Sleep mode The Normal Operation mode contains 2 sub-operation modes, which differentiate by the slew rate control of the LIN Bus signal (see Figure 4).
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TLE7259-2GE Functional Description 4.2.1 Normal Slope Mode In Normal Slope mode data transmission rates up to 20 kBauds are possible. Setting the EN pin to “High” starts the transition to Normal Slope mode. (see Figure 5). The mode change to Normal Slope mode is defined by the time tMODE. The time tMODE specifies the delay time between the threshold, where the EN pin detects a “High” input signal, and the actual mode change of TLE72592GE into Normal Slope mode.
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TLE7259-2GE Functional Description Normal Slope Mode Normal Slope Mode Flash Mode tfl1 EN tfl1 Data transmission TxD tfl2 tfl3 tfl4 tfl2 ttorec Figure 6 Timing to enter and leave Flash Mode 4.3 Stand-By Mode Data transm. tfl3 tfl4 ttorec The Stand-By mode is entered automatically after: • • • • • A Power-Up event at the supply VS. A bus Wake-Up event at the pin BUS. A local Wake-Up event at the pin WK. A power on reset caused by power supply VS.
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TLE7259-2GE Functional Description 4.4 Sleep Mode In order to reduce the current consumption the TLE7259-2GE offers a Sleep mode. In Sleep mode the quiescent current on VS and the leakage current on the pin BUS are cut back to a minimum. To switch the TLE7259-2GE from Normal Operation mode to Sleep mode, the EN pin has to be set to “Low”. Conversely a logical “High” on the EN pin sets the device directly back to Normal Operation mode (see Figure 4).
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TLE7259-2GE Functional Description TLE7259-2GE remains in Sleep mode until it detects a change from dominant to recessive on the LIN bus (see Figure 7). In Stand-By mode the TxD pin indicates the source of the Wake-Up event. A weak pull-down on the pin TxD indicates a bus Wake-Up event (see Figure 4). The RxD pin signals if a Wake-Up event occurred or the powerup event. A “Low” signal on the RxD pin reports a local or bus Wake-Up event, a logical “High“ signal on RxD indicates a power-up event. 4.
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TLE7259-2GE Functional Description 4.8 Mode Transition via EN pin EN Signal VEN VEN,ON EN Hysteresis VEN,OFF tMODE Sleep Mode / Stand-By Mode Figure 9 tMODE Normal Operation Mode Sleep Mode Mode Transition via EN pin It is also possible to change from Sleep mode to Normal Operation mode by setting the EN pin to logical “High“. This feature is useful if the external microcontroller is continuously powered, the microcontroller power-supply is not controlled by the INH pin.
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TLE7259-2GE Functional Description 4.9 TxD Time Out function If the TxD signal is dominant for a time t > ttimeout the TxD time-out function deactivates the transmission of the LIN signal to the bus and disables the output stage. This is realized to prevent the bus from being blocked by a permanent “Low” signal on the TxD pin, caused by an error on the external microcontroller (see Figure 10). The transmission is released again, after a rising edge at the pin TxD has been detected.
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TLE7259-2GE Functional Description This feature is only applicable, if the master termination of the LIN bus is connected to the INH pin, instead of being connected to the power supply VS (see Figure 15 and Figure 16). Internally, the 30 kΩ path is also switched off from the power supply VS (see Figure 1). A separate Master Termination Switch is implemented at the pin BUS, to avoid a voltage drop on the recessive level of LIN bus, in case of a dominant level or a short to ground on at the LIN bus. 4.
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TLE7259-2GE General Product Characteristics 5 General Product Characteristics 5.1 Absolute Maximum Ratings Table 3 Absolute Maximum Ratings Voltages, Currents and Temperatures1) All voltages with respect to ground; positive current flowing into pin; (unless otherwise specified) Pos. Parameter Symbol Limit Values Min. Max. Unit Remarks LIN Spec 2.2A (Par. 11) Voltages 5.1.1 Battery supply voltage VS -0.3 40 V 5.1.
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TLE7259-2GE General Product Characteristics 5.2 Functional Range Table 4 Operating Range Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Remarks Supply voltages 5.2.1 Extended Supply Voltage VS(ext) Range for Operation 5 – 40 V Parameter deviations possible 5.2.1 Supply Voltage range for VS(nor) Normal Operation 5.5 – 27 V LIN Spec 2.2A (Par. 10) -40 – 150 °C 1) Thermal parameters 5.2.
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TLE7259-2GE Electrical Characteristics 6 Electrical Characteristics 6.1 Functional Device Characteristics Table 6 Electrical Characteristics 5.5 V < VS < 27 V; RL = 500 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Pos. Parameter Symbol Limit Values Unit Remarks Min. Typ. Max. Current Consumption 6.1.1 Current consumption at VS IS,rec 0.5 1.1 3.0 mA Recessive state, without RL; VS = 13.5 V; VTxD = “High” 6.
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TLE7259-2GE Electrical Characteristics Table 6 Electrical Characteristics (cont’d) 5.5 V < VS < 27 V; RL = 500 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Pos. Parameter Symbol Limit Values Unit Remarks Min. Typ. Max. 6.1.14 HIGH level input voltage range VEN,ON 2 – 5.5 V Normal Operation mode 6.1.15 LOW level input voltage range VEN,OFF -0.3 – 0.8 V Sleep mode or Stand-By mode 150 300 450 mV 1) 6.1.
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TLE7259-2GE Electrical Characteristics Table 6 Electrical Characteristics (cont’d) 5.5 V < VS < 27 V; RL = 500 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Pos. Parameter Symbol Limit Values Unit Remarks Min. Typ. Max. 0.8 × VS – VS – – – – – – 1.2 V 0.2 x VS V 2.0 V Bus Transmitter BUS 6.1.36 Bus recessive output voltage VBUS,ro 6.1.37 Bus dominant output voltage maximum load VBUS,do 6.1.
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TLE7259-2GE Electrical Characteristics Table 6 Electrical Characteristics (cont’d) 5.5 V < VS < 27 V; RL = 500 Ω; -40 °C < Tj < 150 °C; all voltages with respect to ground; positive current flowing into pin; unless otherwise specified. Pos. Parameter Symbol Limit Values Unit Remarks Min. Typ. Max. 6.1.53 Duty cycle D1 (for worst case at 20 kBit/s) D1 0.396 – – duty cycle 16) THRec(max) = 0.744 × VS; THDom(max) = 0.581 × VS; VS = 7.0 … 18 V; tbit = 50 μs; D1 = tbus_rec(min)/2 tbit; LIN Spec 2.
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TLE7259-2GE Electrical Characteristics 6.2 Diagrams VS EN 100 nF INH VµC TxD RBUS RRxD RxD CRxD Bus CBus Figure 11 WK GND Simplified test circuit for dynamic characteristics VS EN 100 nF INH VµC TxD RBUS RRxD RxD CRxD Bus CBus Figure 12 Data Sheet WK GND Simplified test circuit for static characteristics 22 Rev. 1.
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TLE7259-2GE Electrical Characteristics tBit TxD tBit tBit (input to transmitting node) tBus_dom(max) VSUP (Transceiver supply of transmitting node) tBus_rec(min) THRec(max) THDom(max) Thresholds of receiving node 1 THRec(min) THDom(min) Thresholds of receiving node 2 tBus_dom(min) tBus_rec(max) RxD (output of receiving node 1) trx_pdf(1) trx_pdr(1) RxD (output of receiving node 2) trx_pdr(2) trx_pdf(2) Duty Cycle 1 = tBUS_rec(min) / (2 x tBIT) Duty Cycle 2 = tBUS_rec(max) / (2 x tBIT)
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TLE7259-2GE Application Information 7 Application Information 7.1 ESD Robustness according to IEC61000-4-2 Test for ESD robustness according to IEC61000-4-2 “Gun test” (150 pF, 330 Ω) have been performed. The results and test conditions are available in a separate test report.
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TLE7259-2GE Application Information 7.3 Master Termination To achieve the required timings for the dominant to recessive transition of the bus signal an additional external termination resistor of 1 kΩ is mandatory. It is recommended to place this resistor at the master node. To avoid reverse currents from the bus line into the battery supply line it is recommended to place a diode in series with the external pull-up.
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TLE7259-2GE Application Information 7.5 Application Example VBat 22 µF 100 nF VI VQ INH 10 µF GND 100 nF LIN BUS e.g. TLE4678 Master Node VS WK INH 5 V or 3.3V TLE7259-2GE 1 kΩ Pull-Up to Micro Controller Supply RxD TxD BUS 100 nF Micro Controller e.g XC22xx EN GND GND 1 nF ECU1 22 µF 100 nF VI VQ INH 10 µF GND 100 nF e.g. TLE4678 Slave Node VS WK INH 5 V or 3.3V TLE7259-2GE 1 kΩ RxD TxD BUS 220 pF Pull-Up to Micro Controller Supply EN GND 100 nF Micro Controller e.
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TLE7259-2GE Application Information VBat 22 µF 100 nF VI VQ INH 10 µF GND 100 nF LIN BUS e.g. TLE4678 Master Node VS WK INH 5 V or 3.3V TLE7259-2GE 1 kΩ Pull-Up to Micro Controller Supply RxD TxD BUS 100 nF Micro Controller e.g XC22xx EN GND GND 1 nF ECU1 22 µF 100 nF VI VQ INH 10 µF GND 100 nF e.g. TLE4678 Slave Node VS WK INH 5 V or 3.3V TLE7259-2GE 1 kΩ RxD TxD BUS 220 pF Pull-Up to Micro Controller Supply EN GND 100 nF Micro Controller e.
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TLE7259-2GE Package Outlines 8 Package Outlines 0.1 2) 0.41+0.1 -0.06 0.2 8 5 1 4 5 -0.2 1) M 0.19 +0.06 4 -0.2 C B 8 MAX. 1.27 1.75 MAX. 0.175 ±0.07 (1.45) 0.35 x 45˚ 1) 0.64 ±0.25 6 ±0.2 A B 8x 0.2 M C 8x A Index Marking 1) Does not include plastic or metal protrusion of 0.15 max. per side 2) Lead width can be 0.61 max.
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TLE7259-2GE Revision History 9 Revision History Revision Date Changes 1.5 2013-07-26 Editorial changes 1.4 2013-04-25 Data Sheet updated Page: 19, 21: • Parameter 6.1.32: Updated condition, corrected footnote in accordance with LIN specification • Parameter 6.1.33: Corrected footnote in accordance with LIN specification 1.3 2012-04-27 Data Sheet updated • Cover page, change format • Added references to LIN Specification 2.
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Edition 2013-07-26 Published by Infineon Technologies AG 81726 Munich, Germany © 2013 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics.