TPS61169 38-V High-Current Boost WLED Driver  - TPS61169

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

 
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
Special Features
Rating
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    41.1    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       
EasyScale 1-Wire Interface
Enable/Shutdown
OVP
PWM Control   
I2C Control
OVP
PWM Control   
EasyScale 1-Wire Interface
Load Disconnect During Shutdown   
EasyScale 1-Wire Interface
Load Disconnect During Shutdown   
Catalog    Catalog    Catalog    Catalog   
-40 to 85    -40 to 125    -40 to 85    -40 to 85   
5SC70    12DSBGA    6WSON    6SOT-23
6WSON   

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