Infineon Technologies LITIX™ TLD5191E

LITIX™ Power TLD5191ES is a synchronous 4 - switch buck - boost DC/DC controller with built-in protection features.

This concept is beneficial for driving high power LEDs with maximum system efficiency and minimum number of external components for automotive exterior lighting.

Key features

• MOSFET 4 - switch buck-boost DC/DC controller for high power buck-boost LED control
• Constant current and constant voltage regulation
• Wide V_IN range (4.5 V to 40 V)
• Wide LED forward voltage range (V_out range from 2 V to 55 V)

Additional features

• LED current accuracy +/-3% at Tj=25° C 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%)
• EMC optimized device: spread spectrum always active
• Overvoltage, shorted LED fault and over - temperature diagnostic outputs
• Adjustable soft start
• Enhanced dimming features: analog and PWM dimming (from digi-tal input or sourced by embedded PWM engine)
• Available in a small thermally enhanced TSDSO-24 package
• Automotive AEC Qualified

Benefits

• Enable compact design due to high efficiency
• Reduced EMI emissions
• Easy diagnosis of the load due to reliable protections

Applications

• Driving high power LEDs in automotive applications
• Automotive exterior lighting: full LED headlamp assemblies
• Voltage pre-regulator for rear lamp assemblies