LM3434 Overview
The LM3434 is an adaptive constant on-time DC/DC buck (step-down) constant current controller (a true current source). The LM3434 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.
LM3434 Key Features
- Operating input voltage range of -9V to -30V w.r.t. LED
- Control inputs are referenced to the LED anode
- Output current greater than 6A
- Greater than 30kHz PWM frequency capable
- Negative output voltage capability allows LED anode to be
- No output capacitor required
- Up to 1MHz switching frequency
- Low IQ, 1mA typical
- Soft start
- Adaptive programmable ON time allows for constant ripple
