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參數(shù)資料
| 型號(hào)： | TB62757FUG |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 1430 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | 0.95 MM, PITCH, LEAD FREE, PLASTIC, SSOP-6 |
| 文件頁(yè)數(shù)： | 16/20頁(yè) |
| 文件大?。?/td> | 516K |
| 代理商： | TB62757FUG |
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TB62757FUG
2006-02-206
5
Setting of External Capacitor
In case not using PWM signal to SHDN terminal for brightness control, recommended values are
C1 = Over 2.2 (F), C2 = Over 1.0 (F)
In case with PWM signal to SHDN terminal for brightness control, recommended values are
C1 = Over 4.7 (F), C2 = Under 0.1 (F).
The recommended capacitor values depend on the Brightness Control Method.
<Please refer the next page or later>
The capacitor value must be considered for gain enough accuracy of brightness with reduction of noise from Input
current changing.
Setting of External Inductor Size
Please select the inductor size with referring this table corresponding to each number of LEDs.
LEDs
Indictor Size
Note
2
3
4.7
H
4
6.8
H
5
8.1
H
6
10
H
LED current IF = 20 mA
LED Current IF Setting
The resistance between the FB pin and GND, RSENS () is the resistance for the setting the output current.
Depending on the resistance value, it is possible to set the average output current Io (mA).
The average output current Io (mA) can be approximated with the following equation:
IF = (325 [mV]/RSENS [])
The current value error is
±5%.
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