This document introduces the features and characteristics of LT3956 chip, including circuit principle, application scenarios, etc.
This document describes the design features of the LT3956, a monolithic switching regulator capable of generating constant-current/constant-voltage outputs in buck, boost, or SEPIC topologies. It highlights an 84V-rated low side N-MOSFET switch and high efficiency operation suitable for high power applications like LED driving.
The text details specific capabilities including analog and PWM dimming methods, load fault detection, and protection schemes for the LED driver, switching regulator, and input power supply against open strings or short circuits.
| Current Limit | 3.9A (typ) |
|---|---|
| Input Voltage Range | up to 80V |
| Efficiency | 94% |
The LT3956 can generate constant-current/constant-voltage outputs in buck, boost or SEPIC topologies.
The overvoltage FB comparator triggers the PWMOUT pin to transition low, stopping switching and maintaining the high-side switch in an off-state.