The LM3429MH is a N-channel Controller for constant current LED drivers, It can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75V, makes the LM3429 ideal for illuminating LEDs in a very diverse, large family of applications. Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The controller uses Predictive Off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation. The internal PWM controller is designed for adjustable switching frequencies of up to 2MHz, thus enabling compact solutions. Additional features include analogue dimming, PWM dimming, overvoltage protection, under-voltage lock-out, cycle-by-cycle current limit and thermal shutdown.
● Adjustable current sense voltage
● High-side current sensing
● Input under-voltage protection
● Overvoltage protection
● PWM dimming
● Analogue dimming
● Cycle-by-cycle current limit
● Programmable switching frequency
●This device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
