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SP7685

The SP7685 is a pin-for-pin compatible LED driver charge pump designed for mobile phone camera flashes. It offers a current regulation feature for optimal efficiency and matching, as well as a 2.4MHz operation for tiny external capacitors. With excellent circuit protection and a small 3x3mm DFN package, it is an ideal solution for high-power LED flashes.

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SP7685

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  1. SP7685 1.2Amp White LED Driver Charge Pump

  2. Li + Features & Benefits • Pin-for-pin compatible of the SP6685 / SP6686 • 2.6 sec timeout feature for LED protection • Current regulation for best efficiency and matching • 2.4MHz operation allows for tiny external caps • 1X and 2X automatic switch modes • Programmable flash mode current • PWM dimming control • Excellent circuit protection • Overvoltage • Overcurrent • Overtemperature Small 3x3 mm DFN-10 package! 1mF 1200mA C2 C1 VIN VOUT 4.7mF 10mF SP7685 FLASH FB RSET EN GND Company Confidential

  3. SP7685 Competitive Update Company Confidential

  4. Target Applications • Mobile Phone Camera Flash • 680M handset manufactured in 2005 • Mega-pixel camera phones require LED flash • Traditional Xenon tube solutions big and expensive • Digital Camcorder • Torch mode for motion picture • Autofocus assist beam • High power LED flashlight Company Confidential

  5. SP7685 vs. Traditional Boost Circuit 1mF 10μH VBATT C2 1200mA C1 3.0V - 4.2V VIN VOUT 4.7mF 10mF SP7685 10μF BOOST FLASH FB VBATT VOUT RSET EN 10μF LBI LX GND 1μF LBON PGND RLIM GND 4700pF 100k SHDN FB 1N4148 VFB = 0.75 1k 10k 1Ω 4.02Ω Si1400DL FLASH Si1400DL SHDN TORCH 700mA 200mA 1M 1M Company Confidential

  6. Value Proposition • Industry’s most powerful charge pump solution • Up to 1200mA output current! • Up to 5.5V out for high VF LEDs • No inductor required! • 2.6 sec timeout for LED protection • Small 3x3mm DFN solution • Industry standard DFN footprint • Elimination of bulky coil • Excellent power handling capability • Ease of use • Very few external components • Designed for Li-Ion or alkaline battery cells to power the LEDs directly • No complex inductor based power supply required! • Industrial temperature range • -40°C to +85°C operation • Lead-free packaging available Company Confidential

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