TLD5190QU
The TLD5190QU is a synchronous MOSFET H-Bridge DC-DC controller with built in protection features
This concept of a synchronous and seamless buck-boost regulation provides a very efficient solution for circuits where the output (load) voltage is on the same level as the input voltage, e.g. in short chains with 2 to 3 high power LEDs or laser diodes connected to a 12 V electrical system.
Thanks to the flexibility to be used in current and in voltage mode it is also a perfect device for powering non LED applications like USB and mobile wireless charger or as multipurpose pre-regulation like for infotainment.
As it comes without SPI it is also ideal for all application where a basic feature set is sufficient or where a Microcontroller is not used.
Summary of Features
- MOSFET H-Bridge with Single Inductor DC-DC Controller for high power BUCK-BOOST LED control
- Constant Current and Constant Voltage Regulation
- Wide VIN Range (Device 4.5V to 40V, Power Stage 4.5V to 55V)
- Wide LED forward voltage Range (2V up to 55V)
- LED current accuracy+/-3% at Tj=25° and 4% over the whole automotive temperature range
- Switching Frequency Range from 200 kHz to 700 kHz
- Maximum Efficiency in every condition (up to 96%)
- Flexible current sense (Highside or Lowside)
- EMC optimized device: Features an auto Spread Spectrum concept to ensure best in class EMC performance
- Open Load, Overvoltages, Shorted LED fault and Overtemperature Diagnostic Outputs
- LED and Input current sense with dedicated monitor Outputs
- Smart power protection features for device and load (open load, short of Load, Overtemperature)
- Capability to supply Gate Drivers via external Voltage Regulator
- Adjustable Soft Start
- Enhanced Dimming features to adjust average LED current and PWM dimming
- Available in a small thermally enhanced PG-TQFP-48-9 package
- Automotive AEC Qualified
Potential Applications
- Especially designed for driving high power LEDs in automotive applications
- Ideal for driving (LED) loads on supply/battery voltage level
- Automotive Exterior Lighting, where high efficiency is required or where board space is limited, like high current Low Beam, High Beam or combined Low- and Highbeams
- Non LED applications like USB, mobile wireless charger and multipurpose pre-regulation like for infotainment
