TPS61196-Q1 6-String 400-mA WLED Drvr w/ Independent PWM Dimming for Each String | TI.com

TPS61196-Q1 (ACTIVE)

6-String 400-mA WLED Drvr w/ Independent PWM Dimming for Each String

 

Description

The TPS61196-Q1 provides a highly integrated solution for automotive LCD backlighting with an independent PWM dimming function for each string. This device is a current mode boost controller driving up to six WLED strings with multiple LEDs in series. Each string has an independent current regulator providing a LED current adjustable from 50 mA to 400 mA within ±1.5% matching accuracy. The minimal voltage at the current sink is programmable in the range of 0.3 V to 1 V to fit with different LED current settings. The input voltage range for the device is from 8 V to 30 V.

The TPS61196-Q1 adjusts the boost controller’s output voltage automatically to provide only the voltage required by the LED string with the largest forward voltage drop plus the minimum required voltage at that string's IFB pin, thereby optimizing driver efficiency. Its switching frequency is programmed by an external resistor from 100 kHz to 800 kHz.

The TPS61196-Q1 supports direct PWM brightness dimming. Each string has an independent PWM control input. During the PWM dimming, the LED current is turned on or turned off at the frequency and duty cycle which are determined by the external PWM signal. The PWM frequency ranges from 90 Hz to 22 kHz.

The TPS61196-Q1 integrates overcurrent protection, output short-circuit protection, ISET short-to-ground protection, diode open and short protection, LED open and short protection, and overtemperature shutdown circuit. In addition, the TPS61196-Q1 can detect the IFB pin short to ground to protect the LED string. The device also provides programmable input undervoltage lockout threshold and output overvoltage protection threshold.

Features

  • 8-V to 30-V Input Voltage
  • Up to 120-V Output Voltage
  • 100-KHz to 800-kHz Programmable Switching
    Frequency
  • Adaptive Boost Output for LED Voltages
  • Six Current Sinks, 200-mA Continuous Output,
    400-mA Pulse Output for Each String
  • ±1.5% Current Matching Between Strings
  • High Precision PWM Dimming Resolution up to
    5000:1
  • Programmable OVP Threshold
  • Programmable Input UVLO Threshold
  • Adjustable Soft-Start Time
  • Built-in LED Open and Short Protection
  • Built-in Schottky Diode Open and Short Protection
  • Built-in ISET Short Protection
  • Built-in IFB Short Protection
  • Thermal Shutdown

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Parametrics Compare all products in Automotive LED drivers

 
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
TPS61196-Q1 LP8860-Q1 LP8861-Q1 LP8863-Q1 TPS61165 TPS61165-Q1 TPS61193-Q1 TPS61194-Q1 TPS61199
Boost     Boost Controller     Boost
Sepic    
Boost Controller
Sepic Controller    
Boost     Boost     Boost
Sepic    
Boost
Sepic    
Boost    
6     4     4     6     1     1     3     4     8    
8     3     4.5     3     3     3     4.5     4.5     8    
30     48     40     48     18     18     40     40     30    
120     2     7     7     3     3     6     6     8    
120     48     40     48     38     38     45     40     60    
0.2     0.6     0.4     0.9     1     0.4     0.1     0.4     0.56    
2     2.5     5     10     1.5     1.5     5     5     1.5    
200     150     100     150     400     100     100     100     70    
800     2200     2200     2200     1200     1200     2200     2200     800    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 85     -40 to 105     -40 to 125     -40 to 125     -40 to 85    
Adjustable Switch Frequency     Adjustable Switch Frequency
Boost Sync
Fault Diagnostic
Hybrid Dimming/Phase Shift
I2C Control
Spread Spectrum    
Adjustable Switch Frequency
Boost Sync
Fault Detection
Power-Line FET
Sepic Sync
Spread Spectrum
Temperature Compensation    
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    
EasyScale 1-Wire Interface
Load Disconnect During Shutdown    
Load Disconnect During Shutdown
Synchronous Rectification    
Boost Sync
Spread Spectrum    
Boost Sync
Spread Spectrum    
Adjustable Switch Frequency
Enable/Shutdown
OVP
PWM Control
Thermal Shutdown    
Backlight     Backlight
Dome
Foot Well    
Backlight
Dome
Foot Well    
Backlight       Backlight     Backlight     Backlight      
HTSSOP | 28     HLQFP | 32     HTSSOP | 20     HTSSOP | 38     SOT-23 | 6
WSON | 6    
SOT-23 | 6     HTSSOP | 20