The CXLE87126 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 CXLE87126 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 maxim LED current is programmed by external resistors respectively, making the flash LED solution simple to control. The real LED current at Flash mode and Movie/Torch mode can be programmed by external PWM signal at ENM pin.
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.
Various protection features are built into the CXLE87126, 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.
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[ CXLE87126 ]"
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7.相关产品
产品概述 返回TOP
The CXLE87126 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 CXLE87126 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 maxim LED current is programmed by external resistors respectively, making the flash LED solution simple to control. The real LED current at Flash mode and Movie/Torch mode can be programmed by external PWM signal at ENM pin.
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.
Various protection features are built into the CXLE87126, 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.
The CXLE87126 is available in Green TDFN-3×2-14L package. It operates over an ambient temperature range of -40℃ to +85℃.
产品特点 返回TOP
• 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 and Movie/Torch Mode LED Current
Can be Programmed via PWM Signal at ENM Pin
• 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℃ to +85℃
应用范围 返回TOP
Portable Equipments
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
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LED闪光灯驱动器 |
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Part Number |
CH |
VIN(Min) (V) |
VIN(Max) (V) |
Output Current(mA) |
SHDN Iq (μA) |
Frequency (MHz) |
Package |
|
1 |
2.7 |
5.5 |
500 |
1 |
2.2 |
TDFN-3x3-10L |
|
|
1 |
2.7 |
5.5 |
500 |
1 |
2.2 |
TDFN-3x3-10L |
|
|
1 |
2.7 |
5.5 |
700 |
1 |
2.2 |
TDFN-3x3-10L |
|
|
1 |
2.7 |
5.5 |
700 |
1 |
2.2 |
TDFN-3x3-10L |
|
|
2 |
3 |
5 |
750 |
1 |
2 |
TDFN-3x2-14L |
|
|
2 |
3 |
5 |
750 |
1 |
2 |
TDFN-3x2-14L |
|
|
2 |
3 |
5 |
750 |
1 |
2 |
TDFN-3x2-14L |
|
|
1 |
2.7 |
5.5 |
200 |
1 |
1.2 |
TDFN-2x2-6L |
|
