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LM3648 Datasheet(PDF) 11 Page - Texas Instruments |
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LM3648 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 38 page VOVP PWM Control Thermal Shutdown +150 oC IN VREF I 2 C Interface Error Amplifier Slope Compensation SDA SCL Control Logic/ Registers GND OUT LED TORCH/ TEMP TX STROBE ENABLE SW 65 m: 86 m: Over Voltage Comparator NTC VTRIP INTC ILED Soft-Start 2/4 MHz Oscillator UVLO Input Voltage Flash Monitor OUT-VHR Current Sense/ Current Limit LM3648, LM3648TT www.ti.com SNVSA68B – OCTOBER 2014 – REVISED SEPTEMBER 2015 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Flash Mode In Flash Mode, the LED current source (LED) provides 64 target current levels from 21.8 mA to 1500 mA. Once the Flash sequence is activated the current source (LED) ramps up to the programmed Flash current by stepping through all current steps until the programmed current is reached. The headroom in the current source can be regulated to provide 21.8 mA to 1.5 A. When the device is enabled in Flash Mode through the Enable Register, all mode bits in the Enable Register are cleared after a flash time-out event. Copyright © 2014–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LM3648 LM3648TT |
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