The IS32LT3959/A is a wide input voltage, asynchronous buck controller designed for high-current automotive and industrial LED lighting applications. It features an integrated high-side gate driver to control an external N-channel MOSFET, allowing for scalable output current through an external sense resistor. The device supports both PWM and analog dimming, operating at a constant frequency or in spread-spectrum mode to reduce EMI. It includes comprehensive fault protection for LED string open/short conditions and thermal management.
| RoHS |
Compliant |
| Aec-q100 |
Qualified for Automotive Applications |
| Maximum Duty Cycle |
98% |
| Input Voltage Range |
4.5 to 38V |
| Switching Frequency |
100 to 1000kHz |
| Operating Temperature |
-40 to +150°C |
| Output Current Accuracy |
±3% |