Datasheet Texas Instruments LM3464AMHX/NOPB — Ficha de datos

LM3464, LM3464A
www.ti.com SNVS652F – APRIL 2010 – REVISED MAY 2013 LED Driver with Dynamic Headroom Control and Thermal Control Interfaces
Check for Samples: LM3464, LM3464A FEATURES DESCRIPTION The LM3464/64A is a 4-channel high voltage current
regulator that provides a simple solution for LED
lighting applications. The LM3464/64A provides four
individual current regulator channels and works in
conjunction with external N-channel MOSFETs and
sense resistors to give accurate driving current for
every LED string. Additionally, the Dynamic
Headroom Control (DHC) output can be interfaced to
the external power supply to adjust the LED supply
voltage to the lowest level that is adequate to
maintain all the string currents in regulation, yielding
the optimal overall efficiency. 1 2 Wide Input Voltage Range
– 12V-80V (LM3464)
– 12V-95V (LM3464A)
Dynamic Headroom Control Ensures Maximum
Efficiency
4 Output Channels With Individual Current
Regulation
High Channel to Channel Accuracy
Digital PWM/Analog Dimming Control Interface
Resistor Programmable Dimming Frequency …