CXLE87124 is the ideal power solution for high-power 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

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The CXLE87124 is the ideal power solution for high-power 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 CXLE87124 has separate Flash mode and Movie/Torch mode enable pins for maximum flexibility. Flash mode is usually used with 660ms timer control to generate a high intensity flash. 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.zz1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.zz1嘉泰姆

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Various protection features are built into the CXLE87124, 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.zz1嘉泰姆

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The CXLE87124 is available in Green TDFN-3×2-14L package. It operates over an ambient temperature range of -40℃</span> to +85℃</span>.zz1嘉泰姆

   产品特点 返回TOPzz1嘉泰姆

• 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 Control
• 660ms Flash Timer Control
• 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>zz1嘉泰姆

   应用范围 返回TOPzz1嘉泰姆

Portable Equipmentszz1嘉泰姆

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