Infineon Technologies LITIX™ Power Flex H-Bridge

The TLD5542-1 is a synchronous MOSFET H-Bridge DC-DC controller with built-in protection features and SPI interface. This concept is beneficial for driving high power LEDs with maximum system efficiency and minimum number of external components. The TLD5542-1 offers both, analog and digital (PWM) dimming.

The switching frequency is adjustable in the range of 200 kHz to 700 kHz. It can be synchronized to an external clock source. A built-in programmable Spread Spectrum switching frequency modulation and the forced continuous current regulation mode improve the overall EMC behavior.

Key features

• Constant current & constant voltage regulation
• High efficiency in every condition (up to 95%)
• Input voltage range (V_IN): 4.5 V to 40 V
• Output voltage range (V_OUT): 2 V to 55 V

Additional features

• EMC+: Spread spectrum
• LED current accuracy: ±3%
• Switching frequency: from 200 kHz to 700 kHz
• SPI for diagnostic/control
• Limp Home function (Fail Safe)
• Additional Benefits:
  • Buck-Boost controller enabling maximum efficiency in every condition (up to 96%)
  • Constant current & constant voltage regulation to enable a wide field of application fit
  • Improved Fast output discharge to drive combined LED loads
  • Multichannel time-sharing is possible

Applications

• Front light LED driver, like high-beam/low-beam
• Laser diode driver
• Non-lighting functions like wireless charger
• Voltage Regulators

Available tools

• TLD5542-1_MULTI_EVAL:
• An evaluation platform for the TLD5542-1, which can drive 3 LED functions (HB, LB, DRL), with a single DC/DC converter for a compact, cost-effective and efficient LED driver module.
• Schematics and manual are available for download.
• Order code: TLD55421MULTIEVALTOBO1

• TLD5542-1IVREG-EVAL:
• An evaluation platform for the TLD5542-1 as a LED driver and Voltage regulator. The default configuration is a constant current LED driver with 1.5 A maximum output current.
• The output current can be increased up to 6 A or more by changing a shunt resistor.
• The evaluation board can be controlled with a PC GUI with the Config Wizard and the Infineon Toolbox.
• Order code: TLD55421IVREGEVALTOBO1