TPS61169 TPS61169 38-V High-Current Boost WLED Driver | TI.com

TPS61169 (ACTIVE)

TPS61169 38-V High-Current Boost WLED Driver

 

Recommended alternative parts

  • TPS61161  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   Single Channel backlight with simple interface
  • TPS61165  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   1.5A current limit WLED driver in QFN

Description

With a 40-V rated integrated switch FET, the TPS61169 is a boost converter that drives LEDs in series. The boost converter has a 40-V, 1.8-A internal MOSFET with minimum 1.2-A current limit; thus it can drive single or parallel LED strings for small- to large-size panel backlighting. The default white LED current is set with the external sensor resistor, RSET, and the feedback voltage is regulated to 204 mV, as shown in the . During the operation, the LED current can be controlled by using a pulse width modulation (PWM) signal applied to the CTRL pin, through which the duty cycle determines the feedback reference voltage. The TPS61169 does not burst the LED current; therefore, it does not generate audible noises on the output capacitor. For maximum protection, the device features integrated open LED protection that disables the TPS61169 to prevent the output voltage from exceeding the absolute maximum voltage ratings of the device during open LED conditions.

The TPS61169 is available in a space-saving 5-pin SC70 package.

For all available packages, see the orderable addendum at the end of the data sheet.

Features

  • 2.7-V to 5.5-V Input Voltage
  • Integrated 40-V, 1.8-A MOSFET
  • Drives LED String up to 38 V
  • 1.2-A Minimum Switch Current Limit
  • 1.2-MHz Switching Frequency
  • 204-mV Reference Voltage
  • Internal Compensation
  • PWM Brightness Control
  • Open LED Protection
  • Undervoltage Protection
  • Built-in Soft-Start
  • Thermal Shutdown
  • Up to 90% Efficiency

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Parametrics Compare all products in Backlight LED drivers

 
Channels (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Switching Frequency (Max) (kHz)
Type
LED Current Per Channel (mA)
LED (#)
Topology
Shutdown Current (Typ) (uA)
Peak Efficiency (%)
LED Configuration
Function
Features
Operating Temperature Range (C)
Pin/Package
TPS61169 LM3697 TPS61161 TPS61165
1     3     1     1    
2.7     2.7     2.7     3    
5.5     5.5     18     18    
2.7     0     2.7     3    
38     40     38     38    
1500     1100     600     1200    
Inductive     Inductive     Inductive     Inductive    
400     30     20     400    
27     30     10     27    
Boost     Boost     Boost     Boost    
1     1     1     1    
90     91     90     90    
Parallel
Series    
Parallel     Series     Parallel
Series    
Backlight Driver     Backlighting, LED driver        
OVP
PWM Control    
I2C Control
OVP
PWM Control    
EasyScale 1-Wire Interface
Load Disconnect During Shutdown    
EasyScale 1-Wire Interface
Load Disconnect During Shutdown    
-40 to 85     -40 to 125     -40 to 85     -40 to 85    
5SC70     12DSBGA     6WSON     6SOT-23
6WSON