LM3433 Overview
The LM3433 is an adaptive constant on-time DC/DC buck (step-down) constant current controller (a true current source). The LM3433 provides a constant current for illuminating high power LEDs. The output configuration allows the anodes of multiple LEDs to be tied directly to the ground referenced chassis for maximum heat sink efficacy.
LM3433 Key Features
- 2 Operating Input Voltage Range of -9V to -14V w.r.t. LED Anode
- Control Inputs Referenced to the LED Anode
- Output Current Greater than 6A
- Greater than 30kHz PWM Frequency Capable
- Negative Output Voltage Capability Allows
- No Output Capacitor Required
- Up to 1MHz Switching Frequency
- Low IQ, 1mA Typical
- Soft Start
- Adaptive Programmable ON Time Allows for Constant Ripple Current
