• [ CXLE8177 ]

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目录

1.产品概述       2.产品特点     fOr嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）fOr嘉泰姆

5.产品封装       6.电路原理图  fOr嘉泰姆

7.相关产品fOr嘉泰姆

   产品概述 返回TOPfOr嘉泰姆

The CXLE8177 is a charge pump with PWM brightness control for white LED supplies in LCD display backlight applications. The supply voltage ranges from 2.7V to 5.5V, it is ideally suited for all applications powered by a single Li-ion battery cell or three to four NiCd, NiMH, or alkaline battery cells.fOr嘉泰姆

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The device provides a constant current for each LED, and the initial current value can be set by an external resistor. High efficiency is achieved by utilizing a 1×/1.5× fractional conversion technique in combination with very low dropout current sources.fOr嘉泰姆

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The CXLE8177 is capable of driving up to three channels of LEDs at 30mA per channel from a 2.7V to 5.5V input. Additionally, the current controlled charge pump ensures low input current ripple and EMI. A low external part count (two 0.47μF flying capacitors and two small 1μF capacitors at VIN and VOUT) makes this part ideally suited for small, battery-powered applications.fOr嘉泰姆

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The CXLE8177 is available in a Green, space-saving TQFN-3×3-16L package, and is rated over the -40℃ to +85℃ temperature range.fOr嘉泰姆

   产品特点 返回TOPfOr嘉泰姆

• Input Voltage Range: 2.7V to 5.5VfOr嘉泰姆
• Drives up to 3 LEDs at 30mA EachfOr嘉泰姆
• LED Brightness Control Through PWM Control SignalfOr嘉泰姆
• High Efficiency by Fractional Conversion with 1×fOr嘉泰姆
    and 1.5× ModesfOr嘉泰姆
• Switching Frequency: 1MHzfOr嘉泰姆
• Regulated Output Current with 0.5% MatchingfOr嘉泰姆
• Internal Soft-Start Limits Inrush CurrentfOr嘉泰姆
• Low Input Ripple and Low EMIfOr嘉泰姆
• Over-Current and Over-Temperature ProtectionfOr嘉泰姆
• Under-Voltage Lockout with HysteresisfOr嘉泰姆
• Green TQFN-3×3-16L PackagefOr嘉泰姆

   应用范围 返回TOPfOr嘉泰姆

Cellular PhonesfOr嘉泰姆
Smart PhonesfOr嘉泰姆
Digital CamerasfOr嘉泰姆
Handheld PCsfOr嘉泰姆
CamcordersfOr嘉泰姆
PDAsfOr嘉泰姆
Keypad BacklightfOr嘉泰姆

   技术规格书（产品PDF) 返回TOP fOr嘉泰姆

     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！fOr嘉泰姆

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产品封装图 返回TOPfOr嘉泰姆

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电路原理图 返回TOPfOr嘉泰姆

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