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參數(shù)資料
| 型號： | LM3402 |
| 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： | LM3402 |
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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| LM3402HV | 0.5A Constant Current Buck Regulator for Driving High Power LEDs |
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| LM3402HVMMX | 0.5A Constant Current Buck Regulator for Driving High Power LEDs |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3402_07 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:0.5A Constant Current Buck Regulator for Driving High Power LEDs |
| LM3402_08 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:0.5A Constant Current Buck Regulator for Driving High Power LEDs |
| LM3402_1 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM3402/LM3404 Fast Dimming and True Constant LED Current Evaluation Board |
| LM3402EVAL | 功能描述:BOARD EVALUATION FOR LM3402 RoHS:是 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(diǎn):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 |
| LM3402EVAL | 制造商:Texas Instruments 功能描述:EVAL BOARD |
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