tb62734fmg TOSHIBA Semiconductor CORPORATION, tb62734fmg Datasheet - Page 9

• Manufacturer Part Number: tb62734fmg
• Description: Step-up Type Dc-dc Converter For White Led?s
• Manufacturer: TOSHIBA Semiconductor CORPORATION

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3. Example of Application Circuit and Measurement Data: Inductor VLF3010 Series
2.8
2.8
2.8
(TDK)
2 LED drive
3 to 5 LED drive : L = 6.8 µH
6 LED drive
3.1
3.1
3.1
Io
Efficiency
3.4
3.4
3.4
Input - Efficiency / Output Current
Input - Efficiency / Output Current
Input - Efficiency / Output Current
3.7
3.7
3.7
V
CTL
PGND
CC
L
2 LED Drive
3 LED Drive
4 LED Drive
: L = 4.7 µH
: L = 10 µH
4
4
4
Vin (V)
Vin (V)
Vin (V)
TB62734FMG
4.3
4.3
4.3
GND
A
4.6
4.6
4.6
RSENS
S-Di
Io
Efficiency
4.9
Io
Efficiency
4.9
4.9
OVD
K
5.2
5.2
5.2
5.5
5.5
5.5
100
95
90
85
80
100
95
90
85
80
100
95
90
85
80
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L
S-Di : CUS02 1 A/30 V (TOSHIBA)
LED : NSCW215T (NICHIA)
C1
C2
<Measurement Data>
Efficiency in the range of V
Output current in the range of V
( ): Range of V
2.8
2.8
: VLF3010 series (Size: 3.0 × 3.0 × 1.0 mm)
: C2012JB1E225K (TDK)
: C2012JB1E105K (TDK)
2 LED’s
3 LED’s
4 LED’s
5 LED’s
6 LED’s
2 LED’s
3 LED’s
4 LED’s
5 LED’s
6 LED’s
3.1
3.1
Io
Efficiency
Io
Efficiency
3.4
3.4
Input - Efficiency / Output Current
Input - Efficiency / Output Current
IN
3.7
3.7
Output Current
85.70 to 90.39
84.51 to 88.15
83.06 to 86.97
80.94 to 85.78
82.28 to 86.85
21.00 to 24.01
20.57 to 22.48
20.03 to 21.69
19.44 to 21.14
19.96 to 21.46
= 3.0 to 4.3 V
Efficiency (%)
5 LED Drive
6 LED Drive
(mA)
4
4
Vin (V)
Vin (V)
IN
4.3
= 2.8 to 5.5 V
4.3
IN
= 2.8 to 5.5 V
4.6
4.6
TB62734FMG
Average Efficiency
Tolerance (%)
4.9
4.9
14.35(5.53)
9.27(4.06)
8.24(3.74)
8.75(4.07)
7.52(3.40)
2006-06-14
88.47
86.76
85.30
84.07
85.11
(%)
5.2
5.2
5.5
5.5
100
95
90
85
80
100
95
90
85
80