LM3434
Description
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.
Key Features
- Operating input voltage range of -9V to -30V w.r.t. LED anode
- 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 tied directly to chassis for maximum heat sink efficacy
- No output capacitor required
- Up to 1MHz switching frequency
- Low IQ, 1mA typical
- Soft start
- Adaptive programmable ON time allows for constant ripple current
