Texas Instruments LM3463
The LM3463 is a six channel linear LED driver with Dynamic Headroom Control (DHC) interface that is specialized for high power LED lighting applications. The variation of the output current of every output channel in the temperature range of -40°C to 125°C is well controlled to less than ±1%. The output current of every channel is accurately matched to each other with less than ± 1% difference as well.| Part No. | LM3463 |
|---|---|
| Datasheet | LM3463 Download |
| Manufacturer |  Texas Instruments |
| Description | Dynamic Headroom Controller |
| Buy | Stock & Price |
FEATURES
1●2 Dynamic Headroom Control Output to Maximize Efficiency
● 6 Channels Current Regulated LED Driver
● High Precision Analog Dimming Control Interface
● 4 Individual PWM Dimming Control Input
● Dimming Control via Digital Data Bus
● Built-In Maximum MOSFET Power Limiting Mechanism
● Allows Cascade Operation to Extend the Output Channels
● Fault Indicator Output
● Thermal Shutdown
● UVLO With Hysteresis
● 48L WQFN Package KEY SPECIFICATIONS
● Wide supply voltage range (12V-95V)
● Thermal fold-back dimming control
● DHC regulates the lowest MOSFET drain voltage to 1V
APPLICATIONS
● Streetlights● Solid State Lighting Solutions
DESCRIPTION
By interfacing the LM3463 to the output voltage feedback node of a switching power supply via the DHC interface, the system efficiency is optimized automatically. The dynamic headroom control circuit in the LM3463 minimizes power dissipation on the external MOSFETs by adjusting the output voltage of the primary switching power supply according to the changing forward voltage of the LEDs.
