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參數(shù)資料
| 型號(hào)： | MIC3289-16YD6 |
| 廠商： | MICREL INC |
| 元件分類： | 顯示驅(qū)動(dòng)器 |
| 英文描述： | 400 W Transient Voltage Suppressor, SOD123W (SOD2 FlatPower), Reel Pack, SMD |
| 中文描述： | LED DISPLAY DRIVER, PDSO6 |
| 封裝： | TSOT23, 6 PIN |
| 文件頁(yè)數(shù)： | 11/13頁(yè) |
| 文件大?。?/td> | 377K |
| 代理商： | MIC3289-16YD6 |
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Micrel, Inc.
MIC3289
March 2007
11
M9999-030407
(408) 944-0800
Figure 9. Up Counter Roll-over
One-Step Brightness Changes
For applications where a keypad button press is to be
translated into a brightness level change, the following
method of decreasing the brightness level may be
useful. This “One-Step” brightness change procedure
relieves the user from keeping track of the MIC3289’s
up/down counter state. It combines a counter mode
change with a programming pulse, therefore a one-step
decrease in brightness is assured no matter what the
previous up/down counter mode was.
Figure 10. One-Step Brightness Decrease
This method is quite simple and the only requirement is
that the first DC down clock period be equal to the
t
MODE_DOWN
period. Similarly a one-step increase can be
assured by generating a first DC down pulse whose
period is equal to the t
MODE_UP
period followed by one DC
falling edge.
Figure 11. One-Step Brightness Increase
Presetting Brightness
The brightness level can be preset by sending a series
of programming pulses via the DC pin within the
t
PROG_SETUP
period. This pre-programming window starts
at 35μs after the DC pin is driven high and ends 15μs
later. Although the MIC3289s does not drive current into
the load until DC pin is kept high for t
start_up
, pre-
programming must begin somewhere with the 15μs
window or the MIC3289 may continue to start at the full
(default) brightness level.
Figure 12. Pre-programming Timing
Figure 12 shows the correct pre-programming sequence
to set the MIC3289 brightness to level 6 prior to start up.
The sequence is initiated by driving the DC pin low for a
period exceeding t
SHUTDOWN
, to insure that the part has
enter the power saving shutdown state, then the DC pin
is driven high and a number of programming pulses are
sent. Notice that when using the pre-programming
feature the first programming pulse is not ignored. This
is because the counter’s default mode is count down.
The MIC3289 does not drive current into the load until
the DC pin has remained high for time period t
start_up
from
the last programming activity
.
Note that the same limits
on programming timing in normal operation also apply in
pre-programming.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC3289-16YD6 TR | 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.2MHz 0.5A Switch WLED Driver with Digital Brightness Control (lead free) RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC3289-16YD6-TR | 功能描述:LED 驅(qū)動(dòng)器 IC 1 輸出 DC DC 穩(wěn)壓器 升壓（升壓） 1.2A（開(kāi)關(guān)） TSOT-23-6 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 類型:DC DC 穩(wěn)壓器 拓?fù)?升壓（升壓） 內(nèi)部開(kāi)關(guān):是 輸出數(shù):1 電壓 - 供電（最低）:2.5V 電壓 -?供電（最高）:6.5V 電壓 - 輸出:- 電流 - 輸出/通道:1.2A（開(kāi)關(guān)） 頻率:1.2MHz 調(diào)光:- 應(yīng)用:背光 工作溫度:-40°C ~ 125°C （TJ） 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 供應(yīng)商器件封裝:TSOT-23-6 標(biāo)準(zhǔn)包裝:1 |
| MIC3289-16YML | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:1.2MHz PWM White LED Driver with Internal Schottky Diode and True 1-Wire Digital Control |
| MIC3289-16YML TR | 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.2MHz 0.5A Switch WLED Driver with Digital Brightness Control (lead free) RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC3289-16YML-TR | 功能描述:LED 驅(qū)動(dòng)器 IC 1 輸出 DC DC 穩(wěn)壓器 升壓（升壓） 1.2A（開(kāi)關(guān)） 8-MLF?（2x2） 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 類型:DC DC 穩(wěn)壓器 拓?fù)?升壓（升壓） 內(nèi)部開(kāi)關(guān):是 輸出數(shù):1 電壓 - 供電（最低）:2.5V 電壓 -?供電（最高）:6.5V 電壓 - 輸出:- 電流 - 輸出/通道:1.2A（開(kāi)關(guān)） 頻率:1.2MHz 調(diào)光:- 應(yīng)用:背光 工作溫度:-40°C ~ 125°C （TJ） 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤，8-MLF? 供應(yīng)商器件封裝:8-MLF?（2x2） 標(biāo)準(zhǔn)包裝:1 |
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