38V High Efficiency, Boost WLED Driver with Strobe Interface for Flash Mode CXLE87127 is a boost converter that drives LEDs in series. The boost converter has a 40V, 3A internal MOSFET; thus it can d

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With a 40V rated integrated switch FET, the CXLE87127 is a boost converter that drives LEDs in series. The boost converter has a 40V, 3A internal MOSFET; thus it can drive single or parallel LED strings for small to large size panel backlighting. And it is quite suitable for smart phone image capture using display device as a flash mode light source, as it can output up to 200mA current at 30V for 320ms when the strobe signal is active.qTk嘉泰姆

The backlight mode default white LED current is set with the external sensor resistor, RSET, and the feedback voltage is regulated to 200mV, as shown in the typical application. During the operation, the LED current can be controlled by a pulse width modulation (PWM) signal applied to the CTRL pin, through which the duty cycle determines the feedback reference voltage. The CXLE87127 does not burst the LED current; therefore, it does not generate audible noises on the output capacitor. For maximum protection, the device features integrated open LED protection that disables the CXLE87127 to prevent the output voltage from exceeding the IC absolute maximum voltage ratings during open LED conditions.qTk嘉泰姆

When the device is working, if the STROBE pin is pulled up, it will turn on flash mode within 100μs. And the feedback voltage is regulated to 5× of the backlight mode that determined by the PWM signal duty cycle. And it will turn to backlight mode within 100μs when the STROBE pin is pulled down or the strobe signal keeps high over the 320ms timer.qTk嘉泰姆

The CXLE87127 is available in Green TDFN-2×2-6L package. It operates over an ambient temperature range of -40℃</span> to +85℃</span>.qTk嘉泰姆

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• Input Voltage Range: 2.7V to 5.5V
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• Integrated 3A/40V MOSFETqTk嘉泰姆

• Output Voltage Up to 38V (OVP)qTk嘉泰姆

• Output Current Up to 200mA @ 30VqTk嘉泰姆

• Accumulated 320ms Flash Timer ControlqTk嘉泰姆

• 1.2MHz Switching FrequencyqTk嘉泰姆

• PWM Dimming Control InterfacesqTk嘉泰姆

• PWM Frequency: 20kHz ~ 100kHzqTk嘉泰姆

• Strobe Interface for Image Capture ModeqTk嘉泰姆

• Up to 87% Efficiency for 7S2P LEDsqTk嘉泰姆

• Up to 92% Efficiency for 3S20P LEDsqTk嘉泰姆

• Dimming Stable in 1:500 RangeqTk嘉泰姆

• 200mV Feedback Voltage in Backlight ModeqTk嘉泰姆

• 1000mV Feedback Voltage in Flash ModeqTk嘉泰姆

• Built-In Soft-Start FunctionqTk嘉泰姆

• Over-Voltage ProtectionqTk嘉泰姆

• Built-In WLED Open/Short ProtectionqTk嘉泰姆

• PFM Mode at Light LoadqTk嘉泰姆

• Thermal ShutdownqTk嘉泰姆

• -40℃</span> to +85℃</span> Operating Temperature RangeqTk嘉泰姆

• Available in Green TDFN-2×2-6L PackageqTk嘉泰姆

   应用范围 返回TOPqTk嘉泰姆

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Smart phonesqTk嘉泰姆

PDAs, Handheld ComputersqTk嘉泰姆

Backlight for Small and Medium Form-Factor LCD Display with Single-Cell Battery InputqTk嘉泰姆

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