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TLD5085EJ

The TLD5085EJ is a smart LED buck converter with an integrated power-switch, capable of driving up to 1.8A load current with excellent line and load regulation. The main function of this device is to step-down the input voltage and regulating a constant LED current. The constant current regulation is especially beneficial for LED color accuracy and longer lifetime. The TLD5085EJ also has a PWM input which can be used for LED dimming. The switching frequency of 370kHz allows to use small and inexpensive passive components. An Enable function is implemented to reduce the shut-down current consumption to typ. 0.1μA. This IC is suited for use in the harsh automotive environments and provides protection functions such as current limitation and overtemperature shutdown. The integrated soft-start feature avoids a current and voltage over shot at the output during start-up of the device.

Parametric TLD5085EJ Topology DC-DC Buck VS  min  max 4.75V  45.0V IQ  max 1800.0mA fSW 370.0kHz Tolerance 2(4)% Short Circuit Protection Y Inhibit Y PWM Y Open Load Detection N Iq 1.0µA Operating Temperature  min  max -40.0°C  150.0°C Sales Product Name TLD5085EJ OPN TLD5085EJFUMA1 Product Status discontinued Package Name PG-DSO-8 Completely lead free yes Halogen free available RoHS compliant yes Packing Size 2500 Packing Type TAPE & REEL Moisture Level 3

Summary of Features: Wide Input Voltage Range from 4.75V to 45V Constant Current or Constant Voltage Regulation Drives LEDs in Buck Topology Very low shutdown current consumption (typ. 0.1μA) 370 kHz switching frequency PWM Dimming Integrated power-switch (output current up to 1.8A) Internal Soft-Start function ± 2% output current tolerance (± 4% for full load current range) Small thermally enhanced exposed heatslug package Over Temperature Shutdown AEC Qualified Green Product (RoHS Compliant) Target Applications: Automotive Lighting (Reading Light, Dome Light, Dashboard Backlighting) High Power LED Applications Constant Current and Voltage Source

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PCB Design Data