The LT3796EFE#PBF is a 100V Constant-Current and Constant-Voltage Controller with dual current sense ideal for driving LEDs. The fixed frequency and current mode architecture result in stable operation over a wide range of supply and output voltages. Two ground referred voltage FB pins serve as the input for several LED protection features and also allow the converter to operate as a constant-voltage source. The LT3796 features a programmable threshold output current sense amplifier with rail-to-rail common mode range. A separate high side amplifier is gain configurable with two resistors and can be used to regulate a second current or a voltage in combination with one of the FB pins. The PWM input provides LED dimming ratios of up to 3000:1. An internal current limit on the INTVCC output protects the LT3796 from excessive on-chip power dissipation. The minimum value of this current limit should be considered when choosing the switching N-channel MOSFET and the operating frequency.
3000:1 True colour PWM? dimming
Current monitoring up to 100V
High side PMOS disconnect and PWM switch driver
Constant-current and constant-voltage regulation
Dual current sense amplifiers with reporting
C/10 detection for battery and SuperCap charging
Linear current sense threshold programming
Short-circuit protection
100kHz to 1MHz Adjustable frequency
Frequency synchronization
Programmable open LED protection with VMODE flag
Programmable under-voltage lockout with hysteresis
(EN)
