LM2759SDX/NOPB ,1A Switched Capacitor Flash LED Driver with I2C Compatible Interface 12-WSON -30 to 85FEATURES APPLICATIONS2• Up to 1A Output Current • Camera Flash in Cellular Phones2• Solution Area < ..
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LM2759SD/NOPB-LM2759SDX/NOPB
1A Switched Capacitor Flash LED Driver with I2C Compatible Interface
COUT
VOUT
4.7 μF
ILED = Up to 1A
LM2759
www.ti.com SNVS577D–JUNE 2008–REVISED MAY 2013
LM2759 1A Switched Capacitor Flash LED Driver withI2C Compatible Interface
Checkfor Samples: LM2759
1FEATURES APPLICATIONS Upto 1A Output Current • Camera Flashin Cellular Phones Solution Area<22 mm2
DESCRIPTION• No Inductor Required LM2759 is an integrated low-noise, high-current
• 90% Peak Efficiency switched capacitor DC/DC converter witha regulated
• Adaptive 1x, 1.5x and2x Gains for Maximum current source. The device requires only four small
Efficiency ceramic capacitors making the total solution area less
than 22 mm2 and the height less than1 mm. The
• Load Disconnectin Shutdown LM2759is capableof driving loads upto 1A froma
• Accurate Input Current Control During Gain single-cell Li-Ion battery. Maximum efficiency is
Transitions achieved over the input voltage range by actively
Flash Time-Out selecting the proper gain based on the LED forward
voltage and current requirements.
• TX Input Pin Ensures Synchronization with RF
Power Amplifier Pulse The LED current canbe programmed upto 1A via an2 C-compatible interface, along with eight selectable
• Torch, Flash, and Indicator ModesFlash Time-Out durations. One high-current Flash
• External Flash Enable via Strobe Input Pin LED can be driven eitherina high-power Flash mode
• Strobe Input Disable viaI2C ora low-power Torch mode. The Strobe pin allows
the flashto be toggled viaa Flash enable signal from
• Programmable Flash Pulse Duration, and camera module. The TX input pin limits the Flash
Torch and Flash Currents viaI2 C-CompatibleLED currentto the Torch current level duringa RF
Interface PA pulse, to reduce high loads on the battery.
• 1MHz Constant Frequency Operation Internal soft-start circuitry limits the amountof inrush
• Low Profile 12–Pin WSON (3mmx 3mmx current during start-up.
0.8mm) LM2759 is offered ina small 12-pin thermally
enhanced WSON package.
Typical Application Circuit
