LM3464MHX

• Wide input voltage range

• 12V - 80V（LM3464）

• 12V - 95V（LM3464A）
• Dynamic headroom control ensures maximum efficiency
• 4 personal current regulation output channels
• High channel accuracy
• Digital PWM/analog dimming control interface
• Resistor programmable dimming frequency and minimum duty cycle (analog dimming mode)
• Direct interface to thermal sensors
• Fault detection
• Over-temperature protection
• Thermal shutdown
• Undervoltage lockout
• Thermally enhanced eTSSOP-28 package

illustrate

The LM3464/64A is a 4-channel high voltage current regulator that provides a simple solution for LED lighting applications. The LM3464/64A provide four independent current-regulation channels combined with an external N-channel MOSFET and sense resistor and are engineered to give accurate drive current for each LED string. In addition, the headroom control (DHC) output can be connected to an external power supply to regulate the LED supply voltage to a minimum level sufficient to maintain all regulation string currents, producing the best overall benefit.

Digital PWM or analog voltage signals can be used to control the duty cycle of all channels. When using analog control, the dimming frequency can be programmed via an external capacitor. The analog dimming thermal feedback provided in a minimum duty cycle control is configured as a condition.

Protection features include input voltage undervoltage lockout, LED open/short and overtemperature fault signals, and system controller.

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• streetlight
• Solid-state lighting solutions