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參數(shù)資料
| 型號： | TB62732FU |
| 廠商： | Toshiba Corporation |
| 元件分類： | LED驅動器 |
| 英文描述： | The step up type DC-DC converter only for white LED driver lighting |
| 中文描述： | 唯一的白光LED驅動器照明加強型DC - DC轉換 |
| 文件頁數(shù)： | 8/15頁 |
| 文件大?。?/td> | 177K |
| 代理商： | TB62732FU |
TOSHIBA
T B 6 2 7 3 2 F U
27, Feb 2002 (Ver.04)
1
10
1.2
1.5
1.8
2
2.2
2.7
3.3
4.7
5.6
6.8
8.2
9.1
Setup resistance R_sens(ohm)
0
5
10
15
20
25
30
35
S
4LEDs
add 3LEDs range
add 2LEDs range
Setup current Io vs Setup resistance R_sens
(Typical value. Vcc=3.6V Ta = 25 degree)
CHOICE OF THE R_sens
The resistance R_sens (ohm) in the K terminal - GND is of the outout current Io for the setup.
The average outout current Io(mA) can be set up by a resistance value.
Average setup electric current Io (mA) is estimated roughly in the following.
Io (mA) = 53(mV) / R_sens (ohm)
For example, R_sens = 2.7 (ohm) becomes Io = 19.6 (mA).
The absolute value accuracy of the current is to take the +/-12 percent into consideration.
(The accuracy of R_sens isn't contained.)
When 320 (mW) is output, this IC recommends L=10 (uH).
Example, when the output power gets over 320 (mW), the setup current Io has the possibility that Io
doesn't meet the set point.
And, this IC can get the setup current Io even if the output side capacitor C2 isn't connected.
In this case, be careful in the rush current IFP (mA) to LED because the LED current becomes the pulse
current of the maximum peak magnitude 380 (mA).
Shortening circuit board wiring by using the part whose reactance element is small as much as possible is
recommended with the R_sens resistor.
And, mounting it near here as much as possible is recommended with each part in application circuit
as well.
8
Fig 5 : The graph of the setup current Io and the setup resistance R_sens
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TB62732FUG | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:Step-up DC/DC Converter for White LED Driver |
| TB62733FTG | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:Charge Pump type DC/DC Converter for White LED Driver |
| TB62734FMG | 制造商:MARKTECH 制造商全稱:Marktech Corporate 功能描述:Step Up Type DC-DC Converter for White LED |
| TB62736FUG | 制造商:MARKTECH 制造商全稱:Marktech Corporate 功能描述:Step-up Type DC-DC Converter for White LEDs |
| TB62736FUG(O,EL) | 功能描述:LED照明驅動器 White LED Driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
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