SNVSA21H May   2014  – April 2025 LP8860-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5.   Device Comparison Table
  6. 4 Pin Configuration and Functions
    1.     Pin Functions
  7. 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  Current Sinks Electrical Characteristics
    7. 5.7  Boost Converter Characteristics
    8. 5.8  Logic Interface Characteristics
    9. 5.9  VIN Undervoltage Protection (VIN_UVLO)
    10. 5.10 VDD Undervoltage Protection (VDD_UVLO)
    11. 5.11 VIN Overvoltage Protection (VIN_OVP)
    12. 5.12 VIN Overcurrent Protection (VIN_OCP)
    13. 5.13 Power-Line FET Control Electrical Characteristics
    14. 5.14 External Temp Sensor Control Electrical Characteristics
    15. 5.15 I2C Serial Bus Timing Parameters (SDA, SCLK)
    16. 5.16 SPI Timing Requirements
    17. 5.17 Typical Characteristics
  8. 6 Detailed Description
    1. 6.1 Overview
      1. 6.1.1 Boost Controller
      2. 6.1.2 LED Output Configurations
      3. 6.1.3 Display Mode
      4. 6.1.4 Cluster Mode
      5. 6.1.5 Hybrid Dimming
      6. 6.1.6 Charge Pump and Square Waveform (SQW) Output
      7. 6.1.7 Power-Line FET
      8. 6.1.8 Protection Features
      9. 6.1.9 Advanced Thermal Protection Features
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Clock Generation
        1. 6.3.1.1 LED PWM Clock Generation With VSYNC
        2. 6.3.1.2 LED PWM Frequency and Resolution
      2. 6.3.2 Brightness Control (Display Mode)
        1. 6.3.2.1 PWM Input Duty Cycle Based Control
        2. 6.3.2.2 Brightness Register Control
        3. 6.3.2.3 PWM Input Duty × Brightness Register
        4. 6.3.2.4 PWM-Input Direct Control
        5. 6.3.2.5 Brightness Slope
        6. 6.3.2.6 LED Dimming Methods
        7. 6.3.2.7 PWM Calculation Data Flow for Display Mode
      3. 6.3.3 LED Output Modes and Phase Shift PWM (PSPWM) Scheme
      4. 6.3.4 LED Current Setting
      5. 6.3.5 Cluster Mode
      6. 6.3.6 Boost Controller
      7. 6.3.7 Charge Pump
      8. 6.3.8 Powerline Control FET
      9. 6.3.9 Protection and Fault Detection Modes
        1. 6.3.9.1 LED Fault Comparators and Adaptive Boost Control
        2. 6.3.9.2 LED Current Dimming With Internal Temperature Sensor
        3. 6.3.9.3 LED Current Limitation With External NTC Sensor
        4. 6.3.9.4 LED Current Dimming With External NTC Sensor
        5. 6.3.9.5 Protection Feature and Fault Summary
    4. 6.4 Device Functional Modes
      1. 6.4.1 Standby Mode
      2. 6.4.2 Active Mode
      3. 6.4.3 Fault Recovery State
      4. 6.4.4 Start-Up and Shutdown Sequences
    5. 6.5 Programming
      1. 6.5.1 EEPROM
      2. 6.5.2 Serial Interface
        1. 6.5.2.1 SPI Interface
        2. 6.5.2.2 I2C Serial Bus Interface
          1. 6.5.2.2.1 Interface Bus Overview
          2. 6.5.2.2.2 Data Transactions
          3. 6.5.2.2.3 Acknowledge Cycle
          4. 6.5.2.2.4 Acknowledge After Every Byte Rule
          5. 6.5.2.2.5 Addressing Transfer Formats
          6. 6.5.2.2.6 Control Register Write Cycle
          7. 6.5.2.2.7 Control Register Read Cycle
    6. 6.6 Register Maps
      1. 6.6.1 Register Bit Explanations
        1. 6.6.1.1  Display/Cluster1 Brightness Control MSB
        2. 6.6.1.2  Display/Cluster1 Brightness Control LSB
        3. 6.6.1.3  Display/Cluster1 Output Current MSB
        4. 6.6.1.4  Display/Cluster1 Output Current LSB
        5. 6.6.1.5  Cluster2 Brightness Control MSB
        6. 6.6.1.6  Cluster2 Brightness Control LSB
        7. 6.6.1.7  Cluster2 Output Current
        8. 6.6.1.8  Cluster3 Brightness Control MSB
        9. 6.6.1.9  Cluster3 Brightness Control LSB
        10. 6.6.1.10 Cluster3 Output Current
        11. 6.6.1.11 Cluster4 Brightness Control MSB
        12. 6.6.1.12 Cluster4 Brightness Control LSB
        13. 6.6.1.13 Cluster4 Output Current
        14. 6.6.1.14 Configuration
        15. 6.6.1.15 Status
        16. 6.6.1.16 Fault
        17. 6.6.1.17 LED Fault
        18. 6.6.1.18 Fault Clear
        19. 6.6.1.19 Identification
        20. 6.6.1.20 Temp MSB
        21. 6.6.1.21 Temp LSB
        22. 6.6.1.22 Display LED Current MSB
        23. 6.6.1.23 Display LED Current LSB
        24. 6.6.1.24 Display LED PWM MSB
        25. 6.6.1.25 Display LED PWM LSB
        26. 6.6.1.26 EEPROM Control
        27. 6.6.1.27 EEPROM Unlock Code
      2. 6.6.2 EEPROM Bit Explanations
        1. 6.6.2.1  EEPROM Register 0
        2. 6.6.2.2  EEPROM Register 1
        3. 6.6.2.3  EEPROM Register 2
        4. 6.6.2.4  EEPROM Register 3
        5. 6.6.2.5  EEPROM Register 4
        6. 6.6.2.6  EEPROM Register 5
        7. 6.6.2.7  EEPROM Register 6
        8. 6.6.2.8  EEPROM Register 7
        9. 6.6.2.9  EEPROM Register 8
        10. 6.6.2.10 EEPROM Register 9
        11. 6.6.2.11 EEPROM Register 10
        12. 6.6.2.12 EEPROM Register 11
        13. 6.6.2.13 EEPROM Register 12
        14. 6.6.2.14 EEPROM Register 13
        15. 6.6.2.15 EEPROM Register 14
        16. 6.6.2.16 EEPROM Register 15
        17. 6.6.2.17 EEPROM Register 16
        18. 6.6.2.18 EEPROM Register 17
        19. 6.6.2.19 EEPROM Register 18
        20. 6.6.2.20 EEPROM Register 19
        21. 6.6.2.21 EEPROM Register 20
        22. 6.6.2.22 EEPROM Register 21
        23. 6.6.2.23 EEPROM Register 22
        24. 6.6.2.24 EEPROM Register 23
        25. 6.6.2.25 EEPROM Register 24
  9. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Typical Application for Display Backlight
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1  Inductor Selection
          2. 7.2.1.2.2  Output Capacitor Selection
          3. 7.2.1.2.3  Input Capacitor Selection
          4. 7.2.1.2.4  Charge Pump Output Capacitor
          5. 7.2.1.2.5  Charge Pump Flying Capacitor
          6. 7.2.1.2.6  Diode
          7. 7.2.1.2.7  Boost Converter Transistor
          8. 7.2.1.2.8  Boost Sense Resistor
          9. 7.2.1.2.9  Power Line Transistor
          10. 7.2.1.2.10 Input Current Sense Resistor
          11. 7.2.1.2.11 Filter Component Values
            1. 7.2.1.2.11.1 Critical Components for Design
        3. 7.2.1.3 Application Performance Plots
      2. 7.2.2 Low VDD Voltage and Combined Output Mode Application
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
        3. 7.2.2.3 Application Performance Plots
      3. 7.2.3 High Output Voltage Application
        1. 7.2.3.1 Design Requirements
        2. 7.2.3.2 Detailed Design Procedure
        3. 7.2.3.3 Application Performance Plots
      4. 7.2.4 High Output Current Application
        1. 7.2.4.1 Design Requirements
        2. 7.2.4.2 Detailed Design Procedure
        3. 7.2.4.3 Application Performance Plots
      5. 7.2.5 Three-Channel Configuration Without Serial Interface
        1. 7.2.5.1 Design Requirements
        2. 7.2.5.2 Detailed Design Procedure
        3. 7.2.5.3 Application Performance Plots
      6. 7.2.6 Solution With Minimum External Components
        1. 7.2.6.1 Design Requirements
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  10. 8 Device and Documentation Support
    1. 8.1 Device Support
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Community Resources
    5. 8.5 Trademarks
  11. 9 Revision History
  12. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.6 Register Maps

Table 6-22 Register Map
ADDRREGISTERD7D6D5D4D3D2D1D0
0x00DISP_CL1_BRTDISP_CL1_BRT[15:8]
0x01DISP_CL1_BRT[7:0]
0x02DISP_CL1_CURRENTRESERVEDDISP_CL1_CURRENT[11:8]
0x03DISP_CL1_CURRENT[7:0]
0x04CL2_BRTRESERVEDCL2_BRT[12:8]
0x05CL2_BRT[7:0]
0x06CL2_CURRENTCL2_CURRENT[7:0]
0x07CL3_BRTRESERVEDCL3_BRT[12:8]
0x08CL3_BRT[7:0]
0x09CL3_CURRENTCL3_CURRENT[7:0]
0x0ACL4_BRTRESERVEDCL4_BRT[12:8]
0x0BCL4_BRT[7:0]
0x0CCL4_CURRENTCL4_CURRENT[7:0]
0x0DCONFIGURATIONRESERVEDDRV_LED_CURENT_SCALE[2:0]EN_ADVANCED_
SLOPE		PWM_SLOPE[2:0]
0x0ESTATUSRESERVEDBRT_SLOPE_
DONE		TEMP_RES_
MISSING		EXT_TEMP_
FLAG_L		EXT_TEMP_
FLAG_H
0x0FFAULTRESERVEDVIN_OVPVIN_UVLOTSDBOOST_OCPBOOST_OVPPL_FET_
FAULT		CP_2X_
FAULT
0x10LED FAULTRESERVEDOPEN_LEDSHORT_LEDLED_FAULT[4:1]
0x11FAULT CLEARRESERVEDCLEAR_FAULTS
0x12IDFULL_LAYER_REVISIONMETAL_REVISION
0x13TEMP MSBRESERVEDTEMP[10:8]
0x14TEMP LSBTEMP[7:0]
0x15DISP LED CURRENTRESERVEDLED_CURRENT[11:8]
0x16LED_CURRENT[7:0]
0x17DISP LED PWMPWM[15:8]
0x18PWM[7:0]
0x19EEPROM_CNTRLEE_READYRESERVEDEE_PROGEE_READ
0x1AEEPROM_UNLOCKEEPROM_UNLOCK_CODE[7:0]
Table 6-23 EEPROM Register Map(1)
ADDRREGISTERD7D6D5D4D3D2D1D0
0x60EEPROM REG 0EXT_TEMP_MINUS[1:0]DRV_LED_BIAS_CTRL[1:0]LED_CURRENT_CTRL[11:8]
0x61EEPROM REG 1LED_CURRENT_CTRL[7:0]
0x62EEPROM REG 2RESERVEDEN_STEADY_
DITHER		PWM_INPUT_HYSTERESIS[1:0]EN_ADVANCED_SLOPEPWM_SLOPE[2:0]
0x63EEPROM REG 3EN_DISPAY_LED_
FAULT		DRV_LED_CURRENT_SCALE[2:0]LED_STRING_CONF[2:0]EN-PWM_I
0x64EEPROM REG 4EN_CL_LED_
FAULT		DRV_LED_COMP_HYST[1:0]DRV_LED_FAULT_THR[1:0]DRV_HEADR[2:0]
0x65EEPROM REG 5I_SLOPE[2:0]PWM_RESOLUTION[1:0]DITHER[2:0]
0x66EEPROM REG 6RESERVEDGAIN_CTRL[2:0]DRV_EN_EXT_
LED_CUR_CTR		DRV_EN_SPLIT_FETBRT_MODE[1:0]
0x67EEPROM REG 7DRV_OUT2_CORR[3:0]DRV_OUT1_CORR[3:0]
0x68EEPROM REG 8DRV_OUT4_CORR[3:0]DRV_OUT3_CORR[3:0]
0x69EEPROM REG 9EXT_TEMP_GAIN[3:0]BL_COMP_FILTER_SEL[3:0]
0x6AEEPROM REG 10EXT_TEMP_I_
DIMMING_EN		NMOS_PLFET_
EN		SOFT_START_SEL[1:0]PL_SD_LEVEL[1:0]PL_SD_SINK_LEVEL[1:0]
0x6BEEPROM REG 11SLOW_PLL_DIV[12:5]
0x6CEEPROM REG 12EN_SYNCPWM_SYNCPWM_
COUNTER_
RESET		SLOW_PLL_DIV[4:0]
0x6DEEPROM REG 13R_SELL[1:0]SEL_DIVIDEREN_PLLSYNC_PRE_DIVIDER[3:0]
0x6EEEPROM REG 14RESERVEDSYNC_TYPEPWM_FREQ[3:0]
0x6FEEPROM REG 15MASK_BOOST_
OVP_FSM		MASK_BOOST_
OCP_FSM		MASK_OVP_
FSM		MASK_VIN_
UVLO		UVLO_LEVEL[1:0]OVP_LEVEL[1:0]
0x70EEPROM REG 16RESERVEDBOOST_EN_
IRAMP _SU_
DELAY		BOOST_EXT_
CLK_SEL		BOOST_IMAX_SEL[2:0]BOOST_GD_
VOLT
0x71EEPROM REG 17BOOST_EN_
SPREAD_
SPECTRUM		BOOST_SEL_IND[1:0]BOOST_SEL_IRAMP[1:0]BOOST_FREQ_SEL[2:0]
0x72EEPROM REG 18BOOST_DRIVER_SIZE[1:0]EN_ADAPEN_JUMPBRIGHTNESS_JUMP_THRES[1:0]JUMP_STEP_SIZE[1:0]
0x73EEPROM REG 19RESERVEDBOOST_INITIAL_VOLTAGE[5:0]
0x74EEPROM REG 20BOOST_SEL_LLC[1:0]BOOST_SEL_JITTER_FILTER[1:0]BOOST_SEL_I[1:0]BOOST_SEL_P[1:0]
0x75EEPROM REG 21BOOST_OFFTIME_SEL[1:0]BOOST_BLANKTIME_SEL[1:0]RESERVEDBOOST_VO_SLOPE_CTRL[2:0]
0x76EEPROM REG 22VDD_UVLO_LEVELRESERVEDCP_2X_CLK[1:0]CP_2X_ENSQW_PULSE_
GEN_EN
0x77EEPROM REG 23EXT_TEMP_LEVEL_HIGH[3:0]EXT_TEMP_LEVEL_LOW[3:0]
0x78EEPROM REG 24INT_TEMP_LIM[1:0]EXT_TEMP_PERIOD[4:0]EXT_TEMP_
COMP_EN
(1) Unused bits data must not be changed.