LP8861-Q1 Low-EMI High-Performance 4-Channel LED Driver for Automotive Lighting | TI.com

LP8861-Q1 (ACTIVE)

Low-EMI High-Performance 4-Channel LED Driver for Automotive Lighting

 

Description

The LP8861-Q1 is an automotive high-efficiency, low-EMI, easy-to-use LED driver with integrated boost/SEPIC converter. It has four high-precision current sinks that can provide high dimming ratio brightness control with a PWM input signal.

The boost/SEPIC converter has adaptive output voltage control based on the LED current sink headroom voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions. The boost/SEPIC converter supports spread spectrum for switching frequency and an external synchronization with dedicated pin. A wide-range adjustable frequency allows the LP8861-Q1 to avoid disturbance for AM radio band.

The LP8861-Q1 has an option to drive an external p-FET to disconnect the input supply from the system in the event of a fault and reduce inrush current and standby power consumption. The device can reduce LED current based on temperature measured with external NTC sensor to protect LED from overheating and extend LED lifetime.

The input voltage range for the LP8861-Q1 is from 4.5 V to 40 V to support automotive stop/start and load dump condition. The LP8861-Q1 integrates extensive fault detection and protection features.

Features

  • Qualified for Automotive Applications
  • AECQ100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
  • Input Voltage Operating Range 4.5 V to 40 V
  • Four High-Precision Current Sinks
    • Current Matching 1% (Typical)
    • LED String Current up to 100 mA/Channel
    • Dimming Ratio of 10 000:1 at 100 Hz
  • Integrated Boost/SEPIC Converter for LED String Power
    • Output Voltage up to 45 V
    • Switching Frequency 300 kHz to 2.2 MHz
    • Switching Synchronization Input
    • Spread Spectrum for Lower EMI
  • Power-Line FET Control for Inrush Current Protection and Standby Energy Saving
  • Extensive Fault Detection and Tolerance Features
    • Fault Output
    • Input Voltage OVP, UVLO, and OCP
    • Open and Shorted LED Fault Detection
    • Automatic LED Current Reduction With External Temperature Sensor
    • Thermal Shutdown
  • Minimum Number of External Components

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Parametrics

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Part number Order Topology Channels (#) Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Iq (Typ) (mA) LED current per channel (mA) Switching frequency (Max) (kHz) Operating temperature range (C) Features Applications Package Group Package size: mm2:W x L (PKG) Rating
LP8861-Q1 Order now Boost
Sepic    
4     4.5     40     7     40     0.4     5     100     2200     -40 to 125     Adjustable Switch Frequency
Boost Sync
Fault Detection
Power-Line FET
Sepic Sync
Spread Spectrum
Temperature Compensation    
Backlight
Dome
Foot Well    
HTSSOP | 20     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)     Automotive    
LP8860-Q1 Order now Boost Controller     4     3     48     2     48     0.6     2.5     150     2200     -40 to 125     Adjustable Switch Frequency
Boost Sync
Fault Diagnostic
Hybrid Dimming/Phase Shift
I2C Control
Spread Spectrum    
Backlight
Dome
Foot Well    
HLQFP | 32     32HLQFP: 81 mm2: 9 x 9 (HLQFP | 32)     Automotive    
LP8863-Q1 Order now Boost Controller
Sepic Controller    
6     3     48     7     48     0.9     10     150     2200     -40 to 125     Adjustable Switch Frequency
Boost Sync
Enable/Shutdown
Fault Diagnostic
Hybrid Dimming/Phase Shift
I2C Control
Power-Line FET
Precision Dimming Control
Soft Start
Spread Spectrum    
Backlight     HTSSOP | 38     38HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 38)     Automotive    
TPS61165 Order now Boost     1     3     18     3     38     1     1.5     400     1200     -40 to 85     EasyScale 1-Wire Interface
Load Disconnect During Shutdown    
  SOT-23 | 6
WSON | 6    
6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)
See datasheet (WSON)    
Catalog    
TPS61165-Q1 Order now Boost     1     3     18     3     38     0.4     1.5     100     1200     -40 to 105     Load Disconnect During Shutdown
Synchronous Rectification    
Backlight     SOT-23 | 6