LEDFRONTHBLB_REF

This Infineon Reference Design Guide describes a detailed implementation of an automotive front light high beam / low beam combination using the flexible multitopoly DC-DC controller TLD5099EP of the LITIX™ Power family in current controlled buck-boost SEPIC configuration. One single DC-DC channel is used to drive the high beam and low beam. The high beam can be activated in conjunction with the low beam or the low beam can be activated standalone. This represents a cost saving approach especially suitable for entry level LED headlamps. A PWM dimming feature enables furthermore control of brightness and enables derating in extreme operating conditions. State of the art diagnosis is provided as well as transient robustness. Compliant EMC performance is verified according to the CISPR25 standard. Thermal performance information is given and discussed. 

Key components:

• TLD5099EP Multitopology DC-DC controller from the LITIX™ Power family
• IPD60N10S4L OptiMOS™ - T2 as power stage switching MOSFET
• IPD50P04P4L-11 OptiMOS™ - P2 as reverse battery protection MOSFET

Useful links: 

• Click here to view the Reference Design 3D Model.

• Automotive LED front light:
  High beam, low beam
  Daytime running light, turn indicator
• Motorcycle headlamp