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SP7120 Family The Most Efficient Way of Driving LEDs

The SP7120 Family provides the most efficient way of driving LEDs directly from a battery, with flexible dimming control and no additional components. These LED drivers offer high efficiency, low cost, and small footprint solutions in SOT23-6 packages.

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SP7120 Family The Most Efficient Way of Driving LEDs

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  1. SP7120 FamilyThe Most Efficient Way of Driving LEDs Sep 2007

  2. SP7120 Liner LED Driver in SOT23 SP7122 in SOT23-6 SP7120 in SOT23-6 2.7V to 5.5V EN 2.7V to 5.5V EN CTRL Logic CTRL Logic SP7121 in SOT23-6 SP7120A – 2CH 15mA/CH SP7120B – 2CH 20mA/CH SP7120C – 2CH 25mA/CH SP7121 – 2CH, External Programmable SP7122A – 3CH 15mA/CH SP7122B – 3CH 20mA/CH SP7122C – 3CH 25mA/CH 2.7V to 5.5V EN CTRL Logic ISET

  3. Feature and Benefit • Drive LEDs directly from battery, without any switching regulator; no pump, no boost. • Total solution in SOT-23 plus 1 resistor or not even one. • Drive LEDs with 95% possible efficiency and average in 80% for the entire battery life • Drive LEDs with the lowest cost possible compare to any industry standard solution. • Drive LEDs with flexible dimming control and no additional components

  4. SP7120 Common Cathode LED Driver SP7120 in SOT23-6 2.7V to 5.5V EN CTRL Logic • LED Driver for common cathode parallel connected LEDs • Ultra Low Dropout Voltage of 150mV • No EMI, no switching noise • PWM brightness control • Enable/Shutdown control • Shutdown current < 1A • Small footprint SOT23-6 Package • SP7120A – 2CH 15mA/CH • SP7120B – 2CH 20mA/CH • SP7120C – 2CH 25mA/CH Sample March 2007

  5. SP7121/7122 CC LED Drivers SP7122 in SOT23-6 2.7V to 5.5V EN CTRL Logic SP7121 in SOT23-6 2.7V to 5.5V EN CTRL Logic ISET The SP7121 is identical to SP7120 while current value set by external resistor. The SP7122 has three channels with factory preset current value 15mA, 20mA, and 25mA

  6. SP7122 Competitive Analysis

  7. Target Application Backlight • Cellphone • Skype Phone • VoIP phone • Homebase Cordless phone Backlight Backlight Drive LED from USB 5.0V fixed voltage Keypad

  8. Value Proposition • Smaller solution size • SOT23-6, 3x3 total solution area without any external component (Optional Cin for additional noise control) • Lower solution cost • No inductor needed when competing with a boost • No flying cap needed when competing with Charge pump • Higher efficiency • Vin 3.7V, Vf 3.2V efficiency near 86% • Vin 3.5V, Vf 3.3V efficiency close to 95% • What else can you ask for?

  9. END

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