SNVSCC4B October   2023  – December 2024 LP5811

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Synchronous Boost Converter
        1. 7.3.1.1 Undervoltage Lockout
        2. 7.3.1.2 Enable and Soft Start
        3. 7.3.1.3 Switching Frequency
        4. 7.3.1.4 Current Limit Operation
        5. 7.3.1.5 Boost PWM Mode
        6. 7.3.1.6 Boost PFM Mode
      2. 7.3.2 Analog Dimming
      3. 7.3.3 PWM Dimming
      4. 7.3.4 Autonomous Animation Engine Control
        1. 7.3.4.1 Animation Engine Pattern
        2. 7.3.4.2 Sloper
        3. 7.3.4.3 Animation Engine Unit (AEU)
        4. 7.3.4.4 Animation Pause Unit (APU)
      5. 7.3.5 Protections and Diagnostics
        1. 7.3.5.1 Overvoltage Protection
        2. 7.3.5.2 Output Short-to-Ground Protection
        3. 7.3.5.3 LED Open Detections
        4. 7.3.5.4 LED Short Detections
        5. 7.3.5.5 Thermal Shutdown
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
    6. 7.6 Register Maps
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Application
      2. 8.2.2 Design Parameters
      3. 8.2.3 Detailed Design Procedure
        1. 8.2.3.1 Inductor Selection
        2. 8.2.3.2 Output Capacitor Selection
        3. 8.2.3.3 Input Capacitor Selection
        4. 8.2.3.4 Program Procedure
        5. 8.2.3.5 Programming Example
      4. 8.2.4 Application Performance Plots
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

6.5 Electrical Characteristics

Unless specified otherwise, typical characteristics apply over the full ambient temperature range (–40°C < TA < +85°C ), VIN = 3.6 V, VOUT = 5 V, CIN = 1 μF, COUT = 1 μF.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Power Supply
VIN Input voltage range 0.5 5.5 V
VIN_UVLO Under-voltage lockout threshold VIN rising 1.7 1.8 V
VIN falling 0.4 0.5 V
ISD Shutdown current into VIN and SW pin IC disabled (EN = Low), VIN = 3.6 V, TA = 25°C 0.1 0.35 μA
ISTB Standby current into VIN and SW pin CHIP_EN = 0 (bit), Boost enabled (EN = High), VIN = 3.6 V, VOUT set to 3 V, Pass-through mode 26 29 μA
Standby current into VOUT pin CHIP_EN = 0 (bit), Boost disabled (EN = Low), VIN no supply, VOUT force to 5 V 25 28 μA
INOR Normal operation current into VIN and SW pin CHIP_EN = 1 (bit), Boost enabled (EN = High), VIN = 3.6 V, VOUT set to 3 V, Pass-through mode, IOUT0 = IOUT1 = IOUT2 = IOUT3 = 25.5 mA (MC = 0, DC = 255, PWM = 255) 0.45 0.65 mA
Normal operation current into VOUT pin CHIP_EN = 1 (bit), Boost disabled (EN = LOW), VOUT force to 3.6 V, IOUT0 = IOUT1 = IOUT2 = IOUT3 = 25.5 mA (MC = 0, DC = 255, PWM = 255)  0.4 0.6 mA
Boost Output
VOUT Output voltage setting range 3 5.5 V
VOVP Output over-voltage protection threshold VOUT rising 5.5 5.7 5.9 V
VOVP_HYS Over-voltage protection hysteresis 0.2 V
tSS Soft startup time From active EN to VOUT regulation. VIN = 1.8 V, COUT = 22 μF, IVOUT = 0 mA 450 μs
Boost Power Switch
RDS(on) High-side MOSFET on resistance  VVOUT = 5 V 140 mΩ
Low-side MOSFET on resistance  VVOUT = 5 V 60 mΩ
fSW Switching frequency VIN = 3.6 V, VOUT set to 5.0 V, PWM mode 1 MHz
VIN = 1.0 V, VOUT set to 5.0 V, PFM mode 0.5 MHz
ILIM_SW Valley current limit VIN = 3.6 V, VOUT set to 5.0 V 1.6 A
IPRECHG Pre-charge current VIN = 3.6 V 350 mA
LED Driver Output
ICS Constant current sink output range VIN = 3.6 V, VOUT set to 5 V, MC = 0, manual_pwm_x = FFh (100% ON) 0.1 25.5 mA
VIN = 3.6 V, VOUT set to 5 V, MC = 1, manual_pwm_x = FFh (100% ON) 0.2 51 mA
ICS_LKG Constant current sink leakage current VIN = 3.6 V, OUTx = 1 V, manual_pwm_x = 0 (0%) 0.1 1 μA
IERR_D2D Device to device current error, 
IERR_D2D = (IAVE-ISET)/ISET×100%		 All LEDs turn ON. Current set to 0.1 mA (max_current = 0, manual_dc_x = 01h, manual_pwm_x = FFh) –5 5 %
All LEDs turn ON. Current set to 0.2 mA (max_current = 1, manual_dc_x = 01h, manual_pwm_x = FFh) –3 3 %
All LEDs turn ON. Current set to 1 mA (max_current = 0, manual_dc_x = 0Ah, manual_pwm_x = FFh) –5 5 %
All LEDs turn ON. Current set to 1 mA (max_current = 1, manual_dc_x = 05h, manual_pwm_x = FFh) –3 3 %
All LEDs turn ON. Current set to 25.5 mA (max_current = 0, manual_dc_x = FFh, manual_pwm_x = FFh) –5 5 %
All LEDs turn ON. Current set to 51 mA (max_current = 1, manual_dc_x = FFh, manual_pwm_x = FFh) –3 3 %
IERR_C2C Channel to Channel current error
IERR_C2C = (IOUTX-IAVE)/IAVE×100%		 All LEDs turn ON. Current set to 0.1 mA (max_current = 0, manual_dc_x = 01h, manual_pwm_x = FFh) –5 5 %
All LEDs turn ON. Current set to 0.2 mA (max_current = 1, manual_dc_x = 01h, manual_pwm_x = FFh) –3 3 %
All LEDs turn ON. Current set to 1 mA (max_current = 0, manual_dc_x = 0Ah, manual_pwm_x = FFh) –5 5 %
All LEDs turn ON. Current set to 1 mA (max_current = 1, manual_dc_x = 05h, manual_pwm_x = FFh) –3 3 %
All LEDs turn ON. Current set to 25.5 mA (max_current = 0, manual_dc_x = FFh, manual_pwm_x = FFh) –5 5 %
All LEDs turn ON. Current set to 51 mA (max_current = 1, manual_dc_x = FFh, manual_pwm_x = FFh) –3 3 %
VHR LED driver output hearroom voltage All LEDs turn ON. Current set to 25.5 mA (max_current = 0, manual_dc_x = FFh) 0.11 0.15 V
All LEDs turn ON. Current set to 51 mA (max_current = 1, manual_dc_x = FFh) 0.21 0.28 V
fLED_PWM LED PWM frequency pwm_fre = 0 24 kHz
pwm_fre = 1 12 kHz
fOSC Internal oscillator frequency vsync_out_en = 1 6 MHz
Logic Interface
VEN_H EN logic high  VIN > 1.8 V 1.2 V
VEN_L EN logic low  VIN > 1.8 V 0.35 V
VIH_LOGIC High level input voltage of SDA, SCL, SYNC 1.4 V
VIL_LOGIC Low level input voltage of SDA, SCL, SYNC 0.4 V
VOH_LOGIC High level output voltage of SYNC VVOUT - 0.2 V
VOL_LOGIC Low level output voltage of SDA, SYNC 0.4 V
Protection
TSD Thermal shutdown threshold for LED driver part TJ rising 150 °C
Thermal shutdown threshold for Boost converter part TJ rising 155 °C
TSD_HYS Thermal shutdown hysteresis TJ falling below TSD 15 °C
VLOD_TH LED open detection threshold Current set to 25.5 mA (max_current = 0, manual_dc_x = FFh) 70 90 110 mV
Current set to 51 mA (max_current = 1, manual_dc_x = FFh) 150 180 220 mV
VLSD_TH LED short detection threshold lsd_th = 00h 0.32 × VOUT 0.35 × VOUT 0.38 × VOUT V
lsd_th = 01h 0.42 × VOUT 0.45 × VOUT 0.48 × VOUT V
lsd_th = 10h 0.52 × VOUT 0.55 × VOUT 0.58 × VOUT V
lsd_th = 11h 0.62 × VOUT 0.65 × VOUT 0.68 × VOUT V