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  • TPS929160-Q1 16-Channel, Automotive, 40V, High-Side (O)LED Driver With FlexWire™ Interface

    • SLVSG60A April   2023  – April 2024 TPS929160-Q1

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  • TPS929160-Q1 16-Channel, Automotive, 40V, High-Side (O)LED Driver With FlexWire™ Interface
  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Device Bias and Power
        1. 6.3.1.1 Power Bias (VBAT)
        2. 6.3.1.2 Enable and Shutdown (EN)
        3. 6.3.1.3 5V Low-Drop-Out Linear Regulator (VLDO)
        4. 6.3.1.4 Undervoltage Lockout (UVLO) and Power-On-Reset (POR)
        5. 6.3.1.5 Power Supply (SUPPLY)
        6. 6.3.1.6 Programmable Low Supply Warning
      2. 6.3.2  Constant Current Output
        1. 6.3.2.1 Reference Current with External Resistor (REF)
        2. 6.3.2.2 64-Step Programmable High-Side Constant-Current Output
      3. 6.3.3  PWM Dimming
        1. 6.3.3.1 PWM Generator
        2. 6.3.3.2 PWM Dimming Frequency
        3. 6.3.3.3 Blank Time
        4. 6.3.3.4 Phase Shift PWM Dimming
        5. 6.3.3.5 Linear Brightness Control
        6. 6.3.3.6 Exponential Brightness Control
      4. 6.3.4  FAIL-SAFE State Operation
      5. 6.3.5  On-Chip, 8-Bit, Analog-to-Digital Converter (ADC)
        1. 6.3.5.1 Minimum On Time for ADC Measurement
        2. 6.3.5.2 ADC Auto Scan
        3. 6.3.5.3 ADC Error
      6. 6.3.6  NSTB Output
      7. 6.3.7  Diagnostic and Protection in NORMAL State
        1. 6.3.7.1  VBAT Undervoltage Lockout Diagnostics in NORMAL state
        2. 6.3.7.2  Low-Supply Warning Diagnostics in NORMAL State
        3. 6.3.7.3  Supply Undervoltage Diagnostics in NORMAL State
        4. 6.3.7.4  Reference Diagnostics in NORMAL state
        5. 6.3.7.5  Pre-Thermal Warning in NORMAL state
        6. 6.3.7.6  Overtemperature Protection in NORMAL state
        7. 6.3.7.7  Overtemperature Shutdown in NORMAL state
        8. 6.3.7.8  LED Open-Circuit Diagnostics in NORMAL state
        9. 6.3.7.9  LED Short-Circuit Diagnostics in NORMAL state
        10. 6.3.7.10 Single-LED Short-Circuit Detection in NORMAL state
        11. 6.3.7.11 EEPROM CRC Error in NORMAL state
        12. 6.3.7.12 Communication Loss Diagnostic in NORMAL state
        13. 6.3.7.13 Fault Masking in NORMAL state
        14.       55
      8. 6.3.8  Diagnostic and Protection in FAIL-SAFE states
        1. 6.3.8.1  Supply Undervoltage Lockout Diagnostics in FAIL-SAFE states
        2. 6.3.8.2  Low-Supply Warning Diagnostics in FAIL-SAFE states
        3. 6.3.8.3  Supply Undervoltage Diagnostics in FAIL-SAFE State
        4. 6.3.8.4  Reference Diagnostics in FAIL-SAFE states
        5. 6.3.8.5  Pre-Thermal Warning in FAIL-SAFE state
        6. 6.3.8.6  Overtemperature Protection in FAIL-SAFE state
        7. 6.3.8.7  Overtemperature Shutdown in FAIL-SAFE state
        8. 6.3.8.8  LED Open-Circuit Diagnostics in FAIL-SAFE state
        9. 6.3.8.9  LED Short-Circuit Diagnostics in FAIL-SAFE state
        10. 6.3.8.10 Single-LED Short-Circuit Detection in FAIL-SAFE state
        11. 6.3.8.11 EEPROM CRC Error in FAIL-SAFE state
        12. 6.3.8.12 Fault Masking in FAIL-SAFE state
        13.       69
      9. 6.3.9  OFAF Setup In FAIL-SAFE state
      10. 6.3.10 ERR Output
    4. 6.4 Device Functional Modes
      1. 6.4.1 POR State
      2. 6.4.2 INITIALIZATION state
      3. 6.4.3 NORMAL state
      4. 6.4.4 FAIL-SAFE state
      5. 6.4.5 PROGRAM state
    5. 6.5 Programming
      1. 6.5.1 FlexWire Protocol
        1. 6.5.1.1 Protocol Overview
        2. 6.5.1.2 UART Interface Address Setting
        3. 6.5.1.3 Status Response
        4. 6.5.1.4 Synchronization Byte
        5. 6.5.1.5 Device Address Byte
        6. 6.5.1.6 Register Address Byte
        7. 6.5.1.7 Data Frame
        8. 6.5.1.8 CRC Frame
        9. 6.5.1.9 Burst Mode
      2. 6.5.2 Registers Lock
      3. 6.5.3 Register Default Data
      4. 6.5.4 EEPROM Programming
        1. 6.5.4.1 Chip Selection by Pulling REF Pin High
        2. 6.5.4.2 Chip Selection by ADDR Pins Configuration
        3. 6.5.4.3 EEPROM Register Access and Burn
        4. 6.5.4.4 EEPROM PROGRAM state Exit
    6. 6.6 Register Maps
      1. 6.6.1 BRT Registers
      2. 6.6.2 IOUT Registers
      3. 6.6.3 CONF Registers
      4. 6.6.4 CTRL Registers
      5. 6.6.5 FLAG Registers
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Smart Rear Lamp with Distributed LED Drivers
      2. 7.2.2 Design Requirements
      3. 7.2.3 Detailed Design Procedure
      4. 7.2.4 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
  12. IMPORTANT NOTICE

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DCP|38
Thermal pad, mechanical data (Package|Pins)
  • DCP|38
    • PPTD170A
Orderable Information
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  • slvsg60a_pm
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Data Sheet

TPS929160-Q1 16-Channel, Automotive, 40V, High-Side (O)LED Driver With FlexWire™ Interface

1 Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • 16-channel precision high-side current output:
    • Device supply voltage 4.5V to 40V
    • LED supply voltage 4V to 36V
    • Up to 100mA channel current set by resistor
    • 2-bit global, 6-bit independent current setting
    • High-current accuracy < ±5% at 5mA to 100mA
    • Low voltage drop 750mV at 100mA
    • 12-bit independent PWM dimming
    • Programmable PWM frequency up to 20kHz
    • Phase-shift PWM dimming
    • Ultra low quiescent in sleep mode supported by EN and NSTB pin
    • Linear and exponential dimming method
  • FlexWire™ control interface
    • Up to 1MHz clock frequency
    • Maximum 16 devices on one FlexWire bus
    • Up to 24 bytes data transaction in one frame
    • 5V LDO output to supply CAN transceiver
  • Diagnostic and protection:
    • Programmable FAIL-SAFE state
    • LED open-circuit detection
    • LED short-circuit detection
    • Single-LED short-circuit diagnostic
    • Programmable low-supply detection
    • Open-drain ERR for fault indication
    • Watchdog and CRC for FlexWire interface
    • 8-bit ADC for pin voltage measurement
    • Overtemperature protection

2 Applications

  • Automotive exterior rear light
  • Automotive exterior headlight
  • Automotive interior ambient light
  • Automotive cluster display

3 Description

With the increasing demand for animation in automotive lighting, LEDs must be controlled independently. Therefore, LED drivers with digital interfaces are essential to effectively drive pixel-controlled lighting applications. In exterior lighting, multiple lamp functions are typically located on different PCB boards with off-board wires connected to each other. It is difficult for a traditional single-ended interface to meet the strict EMC requirements. By using an industrial-standard CAN physical layer, the UART-based FlexWire interface of the TPS929160-Q1 easily accomplishes long distance off-board communication without impacting EMC.

The TPS929160-Q1 is a 16-channel, 40V high-side LED driver that controls the 8-bit output current and 12-bit PWM duty cycles. The device meets multiple regulation requirements with LED open-circuit, short-to-ground, and single LED short-circuit diagnostics. A configurable watchdog also automatically sets FAIL-SAFE states when the MCU connection is lost, and, with programmable EEPROM, TPS929160-Q1 can flexibly be set for different application scenarios.

Package Information
PART NUMBERPACKAGE(1)BODY SIZE (NOM)
TPS929160-Q1DCP (HTSSOP, 38)9.70mm × 4.40mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
GUID-20230403-SS0I-T2HM-J6DD-GGJS0B9QCGZZ-low.svg Typical Application Diagram

4 Pin Configuration and Functions

GUID-20201118-CA0I-TB7F-FQ5P-CRRG73TWT7BT-low.gif Figure 4-1 DCP Package38-Pin HTSSOP with PowerPAD™ Integrated Circuit PackageTop View
Table 4-1 Pin Functions
PIN I/O DESCRIPTION
NO. NAME
1 RX I FlexWire RX
2 VLDO Power 5V regulator output
3 GND ̶ Ground
4 TX O FlexWire TX
5 NSTB O FlexWire NSTB Output
6 REF I/O Device current reference setting
7 ERR I/O Open-drain error indication
8 EN I Device Enable Pin
9 VBAT Power Power supply for analog and digital circuit
10 SUPPLY Power Power supply for current output channels
11 SUPPLY Power Power supply for current output channels
12 FS1 I Fail-safe input 1
13 FS0 I Fail-safe input 0
14 OUTH1 O Current output channel H1
15 OUTH0 O Current output channel H0
16 OUTG1 O Current output channel G1
17 OUTG0 O Current output channel G0
18 NC ̶ No Connection
19 OUTF1 O Current output channel F1
20 OUTF0 O Current output channel F0
21 NC ̶ No Connection
22 OUTE1 O Current output channel E1
23 OUTE0 O Current output channel E0
24 NC ̶ No Connection
25 OUTD1 O Current output channel D1
26 OUTD0 O Current output channel D0
27 NC ̶ No Connection
28 OUTC1 O Current output channel C1
29 OUTC0 O Current output channel C0
30 NC ̶ No Connection
31 OUTB1 O Current output channel B1
32 OUTB0 O Current output channel B0
33 OUTA1 O Current output channel A1
34 OUTA0 O Current output channel A0
35 ADDR0 I Device address setting (Bit0)
36 ADDR1 I Device address setting (Bit1)
37 ADDR2 I Device address setting (Bit2)
38 ADDR3 I Device address setting (Bit3)

 
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