LT3796EFE#PBF

LINEAR TECHNOLOGY  LT3796EFE#PBF  直流/直流控制器, 恒流, 5V至100V, 1路输出, 降压, 升压, SEPIC, 1MHz, TSSOP-28

The 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.

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3000:1 True colour PWM™ dimming

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Current monitoring up to 100V

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High side PMOS disconnect and PWM switch driver

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Constant-current and constant-voltage regulation

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Dual current sense amplifiers with reporting

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C/10 detection for battery and SuperCap charging

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Linear current sense threshold programming

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Short-circuit protection

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100kHz to 1MHz Adjustable frequency

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Frequency synchronization

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Programmable open LED protection with VMODE flag

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Programmable under-voltage lockout with hysteresis

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Soft-start with programmable fault restart timer