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參數(shù)資料
| 型號： | TB62731FUG |
| 廠商： | Toshiba Corporation |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | Step-up DC-DC Converter for White LED Driver |
| 中文描述： | 升壓型DC - DC轉(zhuǎn)換器，用于白光LED驅(qū)動器 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 250K |
| 代理商： | TB62731FUG |
TB62731FUG
2006-06-14
11
The self-generated temperature T
up
(
°
C) is calculated as follows:
T
up
(°C)
=
((0.32
(0.32
×
0.7))
(0.5
×
0.1
+
0.3
×
0.02
+
1.8
×
0.02
×
0.02))
×
260
=
10.2 (°C)
Thus, the derating start temperature T
s
(
°
C) is calculated as follows:
T
s
(°C)
=
45 (°C)
10.4 (°C)
=
34.8 (°C)
As a result, I
o
is controlled in the recommended current range as shown in Figure 5.
Since saturation thermal resistance
θ
ja
=
260 (
°
C/W) is the maximum value,
θ
ja
=
210~260 (
°
C/W) is used as a
mounting condition.
Depending on the IC characteristics, peripherals, and use environment, the derating start temperature
fluctuates among ICs.
Figure 5 Derating Function of Set Current
0
0
25
50
75
100
20
40
60
80
100
120
Change from T
s
= 34.8
°
C (20 mA = 100%)
Change according to T
js
Recommended LED current range (converted by 25 mA)
Temperatures T
s
(
°
C) and T
js
(
°
C)
O
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| TB62732FU | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:The step up type DC-DC converter only for white LED driver lighting |
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| 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 |
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