fixed at 2MHz, providing a very small total solution for portable photo flash. The CXLE87125 has separate Flash mode and Movie/Torch mode enable pins for maximum flexibility. The Flash mode and Movie/

   产品概述 返回TOPimc嘉泰姆

The CXLE87125 is the ideal power solution for highpower flash LEDs used with cell phone camera modules or digital still cameras. It is a highly integrated step-up DC/DC converter with very high switching frequency, fixed at 2MHz, providing a very small total solution for portable photo flash. The CXLE87125 has separate Flash mode and Movie/Torch mode enable pins for maximum flexibility. The Flash mode and Movie/Torch mode LED current is programmed by external resistors respectively, making the flash LED solution simple to control. If both enable pins are at logic high, the LED current will be programmed by the Movie/Torch mode setting resistor.imc嘉泰姆

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The two LED output sinks can be shorted together externally for higher power single flash LEDs, up to 1.5A continuous LED current. Thermal regulation is integrated in Flash mode to limit the IC’s temperature and continuously provide the maximum allowed output current.imc嘉泰姆

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Various protection features are built into the CXLE87125, including cycle-by-cycle input current limit protection, output over-voltage protection, LED fault (open or short) protection and thermal shutdown protection. The leakage current in shutdown is less than 1μA.imc嘉泰姆

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The CXLE87125 is available in Green TDFN-3×2-14L package. It operates over an ambient temperature range of -40℃</span> to +85℃</span>.imc嘉泰姆

   产品特点 返回TOPimc嘉泰姆

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• Input Voltage Range: 3V to 5V
• Dual Flash LED Outputs
• Drive Up to Total 1.5A or 0.75A per Channel
• High Efficiency LED Driver (Up to 90%)
• 2MHz Step-Up Converter
• Very Small Inductor: 1.0μH
• Independent Flash Mode Enable and Movie/Torch
    Mode Enable Pins
• Flash Mode or Movie/Torch Mode Dimming via
    PWM Control
• 10kHz to 200kHz PWM Dimming Frequency
• One Resistor Sets Flash Mode LED Current
• One Resistor Sets Movie/Torch Mode LED Current
• Integrated Thermal Regulation Controlimc嘉泰姆

• 330kΩ Pull-Down Resistor on ENM or ENF Pin
• LED Open or Short Protection
• Output Over-Voltage Protection
• Cycle-by-Cycle Inductor Current Limit
• Less than 1μA Shutdown Current
• Available in Green TDFN-3×2-14L Package
• Temperature Range: -40℃</span> to +85℃</span>imc嘉泰姆

   应用范围 返回TOPimc嘉泰姆

Portable Equipmentsimc嘉泰姆

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