- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384598 > LM3407 (National Semiconductor Corporation) 350 mA, Constant Current Output Floating Buck Switching Converter for High Power LEDs PDF資料下載
參數(shù)資料
| 型號： | LM3407 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 350 mA, Constant Current Output Floating Buck Switching Converter for High Power LEDs |
| 中文描述： | 350毫安，恒流輸出浮點高功率LED的降壓開關(guān)轉(zhuǎn)換器 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 321K |
| 代理商： | LM3407 |
PRINTED CIRCUIT BOARD DESIGN
Since the copper traces of PCBs carry resistance and para-
sitic inductance, the longer the copper trace, the higher the
resistance and inductance. These factors introduce voltage
and current spikes to the switching nodes and may impair cir-
cuit performance. To optimize the performance of the
LM3407, the rule of thumb is to keep the connections between
components as short and direct as possible. Since true aver-
age current regulation is achieved by detecting the average
switch current, the current setting resistor R
must be lo-
cated as close as possible to the LM3407 to reduce the
parasitic inductance of the copper trace and avoid noise pick-
up. The connections between the LX pin, rectifier D1, inductor
L1, and output capacitor C
should be kept as short as
possible to reduce the voltage spikes at the LX pin. It is rec-
ommended that C
, the output filter capacitor for the inter-
nal linear regulator of the LM3407, be placed close to the VCC
pin. The input filter capacitor C
IN
should be located close to
L1 and the cathode of D1. If C
is connected to the VIN pin
by a long trace, a 0.1μF capacitor should be added close to
VIN pin for noise filtering. In normal operation, heat will be
generated inside the LM3407 and may damage the device if
no thermal management is applied. For more details on
switching power supply layout considerations see Application
Note AN-1149: Layout Guidelines for Switching Power Sup-
plies.
30046626
FIGURE 7. Typical Application Schematic for 6 LEDs
30046627
FIGURE 8. Typical Application Schematic for 1 LED
13
www.national.com
L
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM3407MY | 350 mA, Constant Current Output Floating Buck Switching Converter for High Power LEDs |
| LM3407MYX | 350 mA, Constant Current Output Floating Buck Switching Converter for High Power LEDs |
| LM3410YSDX | 525kHz/1.6MHz, Constant Current Boost and SEPIC LED Driver with Internal Compensation |
| LM3410 | 525kHz/1.6MHz, Constant Current Boost and SEPIC LED Driver with Internal Compensation |
| LM3410XMF | 525kHz/1.6MHz, Constant Current Boost and SEPIC LED Driver with Internal Compensation |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3407_09 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:350 mA, Constant Current Output Floating Buck Switching Converter for High Power LEDs |
| LM3407_11 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM3407 350 mA, Constant Current Output Floating Buck Switching Converter |
| LM3407EVAL | 功能描述:BOARD EVALUATION FOR LM3407 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - LED 驅(qū)動器 系列:PowerWise® 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® 電流 - 輸出 / 通道:20mA 輸出及類型:1，非隔離 輸出電壓:17V 特點:可調(diào)光 輸入電壓:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相關(guān)產(chǎn)品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD |
| LM3407EVAL/NOPB | 功能描述:電源管理IC開發(fā)工具 LM3407 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM3407MY | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 4.5V to 30V 8-Pin MSOP EP T/R 制造商:Texas Instruments 功能描述:BUCK SW CONVERTER, 350MA, POWERWISE |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。