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LED驱动器 
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主要特征
应用/用途
Parametric specs for LED Drivers
| VIN (V) (min) | 2.6 |
| VIN (V) (max) | 5.5 |
| Max. No. of LEDs | 6 |
| # LED Channels | 1 |
| Regulation Topology | Inductor Based |
| Battery Input | 1-Cell Li+ |
| LED Configuration | Series |
| ILED per Channel (A) (max) | 0.06 |
| Dimming Ratio (max) | 20 |
| Dimming Control | Analog |
| VCURR_SENSE (mV) | 75 |
| POUT (W) | 0.8 |
| ICC (mA) (max) | 2 |
| LED String Volt. (V) (max) | 12 |
| Switching Frequency (kHz) | 1200 |
| Package/Pins | TDFN/8 |
| Budgetary Price (See Notes) | 1.62 |
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Technical Docs
支持和培训
采样:
选择上方“样片”按钮将重定向至第三方ADI样片网站。登录后，所选部件将转移到您在此网站上的购物车。如果您之前从未使用过此网站，请创建一个新帐户。有关此样片网站的任何问题，请联系SampleSupport@analog.com。
参量
Parametric specs for LED Drivers
| VIN (V) (min) | 2.6 |
| VIN (V) (max) | 5.5 |
| Max. No. of LEDs | 6 |
| # LED Channels | 1 |
| Regulation Topology | Inductor Based |
| Battery Input | 1-Cell Li+ |
| LED Configuration | Series |
| ILED per Channel (A) (max) | 0.06 |
| Dimming Ratio (max) | 20 |
| Dimming Control | Analog |
| VCURR_SENSE (mV) | 75 |
| POUT (W) | 0.8 |
| ICC (mA) (max) | 2 |
| LED String Volt. (V) (max) | 12 |
| Switching Frequency (kHz) | 1200 |
| Package/Pins | TDFN/8 |
| Budgetary Price (See Notes) | 1.62 |
主要特征
- Constant Current Regulation for Uniform Illumination
- High 87% Efficiency
- Analog or Logic Control of LED Intensity
- 0.8W Output Power with Internal High-Voltage MOSFET Switch
- Small, Low-Profile External Components
- 2.6V to 5.5V Input Range
- 13V Maximum Output with Overvoltage Protection
- Optimized for Low Input Ripple
- Programmable Soft-Start
- 0.3µA Shutdown Current
- Small 8-pin Thin QFN (3mm x 3mm) and 8-Pin SOT23 Packages
应用/用途
- 蜂窝电话/智能电话
- 电子书与亚笔记本电脑
- PDA、掌上电脑与无线手持装置
- 白色LED显示器背光
描述
The MAX1848 drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. The step-up converter topology allows series connection of the white LEDs so that the LED currents are identical for uniform brightness. This configuration eliminates the need for ballast resistors and expensive factory calibration. Other benefits include greater simplicity, lower cost, higher efficiency, and greater reliability.
This step-up PWM converter includes an internal, high-voltage, low RDSON N-channel MOSFET switch for high efficiency and maximum battery life. A single analog voltage Dual Mode input provides a simple means of brightness adjustment and on/off control. Fast 1.2MHz current-mode PWM control allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Programmable soft-start eliminates inrush current during startup.
The MAX1848 is available in space-saving 8-pin thin QFN (3mm x 3mm) and 8-pin SOT23 packages.
This step-up PWM converter includes an internal, high-voltage, low RDSON N-channel MOSFET switch for high efficiency and maximum battery life. A single analog voltage Dual Mode input provides a simple means of brightness adjustment and on/off control. Fast 1.2MHz current-mode PWM control allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Programmable soft-start eliminates inrush current during startup.
The MAX1848 is available in space-saving 8-pin thin QFN (3mm x 3mm) and 8-pin SOT23 packages.
Technical Docs
支持和培训
采样:
选择上方“样片”按钮将重定向至第三方ADI样片网站。登录后，所选部件将转移到您在此网站上的购物车。如果您之前从未使用过此网站，请创建一个新帐户。有关此样片网站的任何问题，请联系SampleSupport@analog.com。
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