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SP7686

The SP7686 is a programmable LED flash driver that offers maximum flexibility with its user-programmable LED current. It features a high-speed OSC switching frequency, requires only 4 external components, and has a compact 2mm x 3mm DFN8 package. The SP7686A variant includes pre-programmed 2-level VFB for easy operation.

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SP7686

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  1. SP7686 ProgrammableLED Flash Driver

  2. Features and Benefits • Maximum 500mA IOUT in 2x3 DFN8 • 2.4MHz High Speed OSC switching frequency • Requires only 4 tiny external components • SP7686 features one line serial interface • User programmable LED current • Maximum flexibility • SP7686A features pre-programmed 2-level VFB • Easy to design • Easy to operate • Hassle-free Flash / Torch switching • Up to 94% efficiency in 1x mode • 3.5 sec timeout for LED protection • PWM dimming • Internal soft start limits in-rush current 2mm x 3mm DFN8 3mm x 3mm Company Confidential

  3. External sense resistor gives the max 500mA output capability Li + 0.47mF C2 C1 VIN VFB 60mV to 320mV in 31 steps VOUT 1mF 1mF SP7686 CTRL FB SGND PGND • Single wire control • Built-in LED current setting DAC SP7686 • User Programmable ILED for maximum flexibility Company Confidential

  4. External sense resistor gives the max 500mA output capability Li + 0.47mF C2 C1 Pre-programmed 2-level VFB in 60mV and 140mV VIN VOUT 1mF Flash 1mF SP7686A Torch FLASH FB EN PGND TTL Logic High / Low for Flash / Torch Control SP7686A • Fixed two VFB level for easy operation Company Confidential

  5. Li + 0.47mF C2 C1 VIN VOUT 1mF 1mF SP7686 CTRL FB SGND PGND SP7686 – Program the ILED • Select desired TORCH current, Ex. 120mA • VFB = 60mV typical @ TORCH mode • RFB = 0.5 Ohm • DAC program VFB in 31 steps, 10mV / step • FLASH mode current then adjusted accordingly Company Confidential

  6. Li + 0.47mF C2 C1 VIN VOUT 1mF 1mF SP7686A FLASH FB EN PGND SP7686A – Program the ILED • Select a desired TORCH current, Ex 150mA • VFB = 60mV typical @ TORCH mode • Then pick RFB = 0.4 Ohm • VFB = 160mV typical @ FLASH mode • FLASH mode current then set to 400mA according to pre-selected RFB Company Confidential

  7. SP7686 Competitive Analysis • Powerful 500mA / DAC Programmability / 2.4MHz OSC / Time Out LED Protection • All in 2x3 DFN8 with only 4 tiny external components Company Confidential

  8. Target Applications • Cellphone Camera Flash • Cellphone Torch Application • High Power Indicator LED • Smart Phone with Programmable LED Current Company Confidential

  9. Value Proposition • Programmable LED current for maximizing battery life • When battery is fully charged, LED flash drive in full power. • When battery drops, to conserve the battery energy, LED flash can be re-programmed to lower power. • Prolong the battery life and maximize standby time • Programmable LED current for serving different condition picture taken • Indoor low light, full power LED flash • Outdoor sunny day backlight, light power LED flash • Outdoor rainy day, mid power LED flash • 2x3 DFN8 to deliver 500mA LED driving capability • Small solution area compare to other competitors • Low component count, low BOM cost Company Confidential

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