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參數(shù)資料
| 型號： | LM3402HV |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 0.5A Constant Current Buck Regulator for Driving High Power LEDs |
| 中文描述： | 0.5A的恒流降壓穩(wěn)壓器用于驅(qū)動高功率LED |
| 文件頁數(shù)： | 12/22頁 |
| 文件大小： | 840K |
| 代理商： | LM3402HV |
Application Information
(Continued)
LOW POWER SHUTDOWN
The LM3402/02HV can be switched to a low power state
(I
IN-SD
= 90 μA) by grounding the RON pin with a signal-level
MOSFET as shown in Figure 3. Low power MOSFETs like
the 2N7000, 2N3904, or equivalent are recommended de-
vices for putting the LM3402/02HV into low power shutdown.
Logic gates can also be used to shut down the LM3402/
02HV as long as the logic low voltage is below the over
temperature minimum threshold of 0.3V. Noise filter circuitry
on the RON pin can cause a few pulses with a longer on-time
than normal after RON is grounded or released. In these
cases the OVP/OCP comparator will ensure that the peak
inductor or LED current does not exceed 300 mV / R
SNS
.
THERMAL SHUTDOWN
Internal thermal shutdown circuitry is provided to protect the
IC in the event that the maximum junction temperature is
exceeded. The threshold for thermal shutdown is 165C with
a 25C hysteresis (both values typical). During thermal shut-
down the MOSFET and driver are disabled.
20192112
FIGURE 2. Output Open Circuit Protection
20192113
FIGURE 3. Low Power Shutdown
L
www.national.com
12
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3402HVEVAL | 功能描述:BOARD EVALUATION FOR LM3402HV RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - LED 驅(qū)動器 系列:PowerSmart® 標準包裝: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 |
| LM3402HVEVAL | 制造商:Texas Instruments 功能描述:EVAL BOARD |
| LM3402HVEVAL/NOPB | 功能描述:LED 照明開發(fā)工具 LM3402 EVAL BOARD RoHS:否 制造商:Fairchild Semiconductor 產(chǎn)品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝: |
| LM3402HVMM | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| LM3402HVMM/NOPB | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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