White LED Driver with PWM Brightness Control in Small Packages With a 40V rated integrated switch FET, the CXLE8189 is a boost converter that drives up to 10 LEDs in series

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With a 40V rated integrated switch FET, the CXLE8189 is a boost converter that drives up to 10 LEDs in series. The boost converter runs at a 1.2MHz fixed switching frequency with 1.1A switch current limit, and allows for the use of a high brightness LED in general lighting.npX嘉泰姆

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The default white LED current is set with the external sensor resistor R_SET, and the feedback voltage is regulated to 200mV, as shown in the typical application. During the operation, the LED current can be controlled using PWM signal through the CTRL pin, the pulse width modulation (PWM) signal determines the feedback reference voltage. In PWM mode, the CXLE8189 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 CXLE8189 to prevent the output voltage from exceeding the IC’s absolute maximum voltage ratings during open LED conditions.npX嘉泰姆

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The CXLE8189 is available in Green TDFN-2×2-6L and TSOT-23-6 packages. It operates over an ambient temperature range of -40℃</span> to +85℃</span>.npX嘉泰姆

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• Input Voltage Range: 3V to 20V
• 38V Open LED Protection for 10 LEDs
• 200mV Reference Voltage
• 500kΩ Pull-Low Resistor on CTRL Pin
• 1.1A Switch FET with 1.2MHz Switching Frequency
• PWM Brightness Control
• 1kHz to 100kHz PWM Dimming Frequency Range
• Soft-Start Function
• Up to 90% Efficiency
• -40℃</span> to +85℃</span> Operating Temperature Range
• Available in Green TDFN-2×2-6L and TSOT-23-6
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   应用范围 返回TOPnpX嘉泰姆

High Brightness LED Lighting
White LED Backlighting for Media Form Factor DisplaynpX嘉泰姆

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