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谁有白光LED驱动电路 |
| 作者：xjlia2000 栏目：电源技术 |
谁有白光LED驱动电路，最好是1。5V的，驱动4-5只发光管，最好是散件组装，因集成电路太难找，当然也可参考，谢谢。Emall:xiajiliang2000@yahoo.com.cn |
| 2楼： | >>参与讨论 |
| 作者： pride_chen 于 2005/1/25 9:23:00 发布：
AAT3113 在输入电压在2.7-5.5V的范围之间可驱动4－6颗白光LED，每个LED的通过最大电流是20mA，外部仅需要4颗电容。 需要的话可与我联系 pride_chen@hotmail.com |
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| 3楼： | >>参与讨论 |
| 作者： shenzhenic 于 2005/1/25 13:46:00 发布：
推荐AMC7100 Series AMC7100/01/02/10/11/12 White/Blue LED Driver for Li-Ion BATTERY Application SOT26 MSOP8 DESCRIPTION Data Sheet Download: AMC7100/01/02/10/11/12 are member of ADDM's North Star White/Blue LED driver family. No external component was required. Especially GOOD for use Li-ion BATTERY direct driving LCD DISPLAY's backlight WHITE LEDs. Since no Boost converter or charge pump inside, the efficiency could reach 93% and no switching noise. Integrated 16-step programmable OUTPUT sink current CONTROL CIRCUIT that could PROGRAMMING LED's current (brightness) (AMC7100/1/2). Target end application are color LCD DISPLAY mobile phone with color DISPLAY, SMART phone, PDA, etc. Features ⊕No external component required. Integrated current sense resistors. ⊕Programmable OUTPUT current CONTROL, PROGRAMMING range 33% to 100% in 16 steps for LED Dimming CONTROL (AMC7100/1/2). ⊕Pre-setted maximum OUTPUT current 20 mA. ⊕Individual current sink CIRCUIT for all LEDs OUTPUTs to prevent SHORT / open CIRCUIT on LEDs. ⊕3 channels (SOT-26), 4 channels (TSSOP-8), 6 channels (MSOP-10) available. ⊕> 90% efficiency ⊕Supply voltage range 2.7V ~ 6V ⊕0.2uA standby current ⊕ESD protection HBM 2KV Applications ⊕Small Size Color LCD Backlights ⊕Mobile Phone, SMART Phone Keypad Backlights. http://www.micro-bridge.com/amc71xxseries.asp |
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| 4楼： | >>参与讨论 |
| 作者： ZQJ801213 于 2005/1/28 11:39:00 发布：
LM2623 LM2623 General Purpose, Gated Oscillator Based, DC/DC Boost Converter General DESCRIPTION The LM2623 is a high efficiency, general purpose, step-up DC-DC switching REGULATOR for BATTERY-powered and low input voltage systems. It accepts an input voltage between .8 and 14 volts and converts it into a regulated OUTPUT voltage between 1.24 and 14 volts. Efficiencies up to 90% are achievable with the LM2623. In order to ADAPT to a NUMBER of applications, the LM2623 allows the designer to vary the OUTPUT voltage, the operating frequency (300kHz to 2 MHz) and duty cycle (17% to 90%) to optimize the PART’s performance. The selected values can be fixed or can vary with BATTERY voltage or input to OUTPUT voltage ratio. The LM2623 uses a very simple, on/off regulation mode to produce GOOD efficiency and stable operation over a wide operating range. It normally regulates by skipping switching cycles when it reaches the regulation limit (PULSE Frequency Modulation). Note: Please read the "Non-Linear Effect" and "Choosing The Correct C3 CAPACITOR" sub-sections of the Design Procedure section of this data sheet, so that any challenges with designing with this PART can be taken into account before a board design/layout is finalized. For Alternative Solutions, See Also: LM2700, LM2622, LM2731, LM2733, and LM2621. Features GOOD Efficiency Over a Very Wide Load Range Very Low OUTPUT Voltage Ripple Small, Mini-SO-8 PACKAGE (Half the Footprint of STANDARD 8 pin SO PACKAGE) 1.09 mm PACKAGE Height Up to 2 MHz Switching Frequency 0.8V to 14V Operating Voltage 1.1V Start-up Voltage 1.24V - 14V Adjustable OUTPUT Voltage Up to 2A Load Current at low OUTPUT Voltages 0.17Ω Internal MOSFET Up to 90% REGULATOR Efficiency 80 &MICRO;A Typical Operating Current (into VDD pin of supply) <2.5&MICRO;A Guaranteed Supply Current In Shutdown 4mm x 4mm Thermally Enhanced LLP PACKAGE Option |
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| 5楼： | >>参与讨论 |
| 作者： xjlia2000 于 2005/2/10 21:40:00 发布：
对不起，我要1.5V的。如3V以上很好解决。 |
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