參數(shù)資料
型號(hào): TB62732FUG
廠商: Toshiba Corporation
元件分類: LED驅(qū)動(dòng)器
英文描述: Step-up DC/DC Converter for White LED Driver
中文描述: 升壓直流/直流轉(zhuǎn)換器白光LED驅(qū)動(dòng)器
文件頁(yè)數(shù): 11/18頁(yè)
文件大?。?/td> 294K
代理商: TB62732FUG
TB62732FUG
2006-06-14
11
Application Evaluation Circuit Example 2
(Example of evaluation result using a
small coil: Coil CXML321610-7R0)
6.8
μ
H is optimum for illumination of serial LEDs 4 to 3 using I
F
=
20 mA.
4.7
μ
H is recommended for steady illumination of serial LED 2 in the range V
IN
>
4.5 V.
Note 7: Connection of C
3
is not necessary in every case. .
The IF is expected to stabilize on decrease of voltage. .
V
IN
– Efficiency/I
F
25
R
=
2
L1 : SUMITOMO CXML321610-7R0
S-Di TOSHIBA CUS02 30 V/1 A
LED NICHIA NSCW215T
V
IN
=
3.0 to 4.3 V
ON
OFF
L1
=
7.0
μ
H
S-Di
C
2
=
μ
F
V
CC
A
SHDN
GND
K
C
1
=
μ
F
C
3
=
0
μ
F
3 to 4
LEDs
I
F
V
IN
(V)
L
F
E
15
20
65
85
75
80
4 LEDs efficiency
4 LEDs IF
3
4.2
3.2
3.6
3.8
3.4
4
70
V
IN
– Efficiency/I
F
V
IN
(V)
L
F
E
15
25
20
65
85
75
80
3 LEDs efficiency
3 LEDs IF
3
4.2
3.2
3.6
3.8
3.4
4
70
V
IN
– Efficiency/I
F
V
IN
(V)
L
F
E
15
25
20
65
85
75
80
2 LEDs efficiency
2 LEDs IF
3
4.2
3.2
3.6
3.8
3.4
4
70
<Measurement>
Efficiency in the range V
IN
=
3.0 to 4.3 V
Number
of LED
Efficiency (%)
Average Efficiency
(%)
2
78.2 to 84.1
81.3
3
72.0 to 79.1
75.8
4
66.9 to 71.1
74.6
I
F
in the range V
IN
=
3.0 to 4.3 V
Number
of LED
I
F
(mA)
V
CC
Dependence (%)
2
19.8 to 21.6
8.1
3
20.0 to 21.0
4.8
4
20.4 to 21.5
4.9
Note 8: The above values have been obtained
through Toshiba’s own measurements.
However, results may vary according to the
measurement environment.
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