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TB62731FUG Fiches technique(PDF) 14 Page - Marktech Corporate

No de pièce TB62731FUG
Description  Step-up DC-DC Converter for White LED Driver
Download  17 Pages
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Fabricant  MARKTECH [Marktech Corporate]
Site Internet  http://www.marktechopto.com
Logo MARKTECH - Marktech Corporate

TB62731FUG Fiches technique(HTML) 14 Page - Marktech Corporate

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TB62731FUG
2004-09-14
14
Application Circuit Example 2
(characteristic using flat coil for handy terminal as reference)
Flat coils suitable for handy terminals have a large DC resistance; thus, the power efficiency drops slightly, to
about 70%.
Input voltage VIN (V)
Input voltage – power efficiency/mean current
Input voltage – power efficiency/mean current
Input voltage VIN (V)
Input voltage – power efficiency/mean current
Input voltage VIN (V)
40
100
70
50
4.2
3.2
3.6
3.8
60
80
3.4
4
90
10
25
15
20
η
IF
40
100
70
50
4.2
3.2
3.6
3.8
60
80
3.4
4
90
10
25
15
20
η
IF
40
100
70
50
4.2
3.2
3.6
3.8
60
80
3.4
4
90
10
25
15
20
η
IF
L1: Toko A914BYW-270M
S-Di: Toshiba 1SS404 20 V/1A
LED: Nichia NSCW215T
R_sens: Susumu RL0510S-1R8
R_sens
1.8
VIN
3.2 V~4.2 V
C1
10
µF
ON
OFF
IF
20 mA
L1
27
µH
S-Di
C2
1
µF
VCC
A
SHDN
GND
GND
K
L1: TDK LDR344812T-390
S-Di: Toshiba 1SS404 20 V/1A
LED: Nichia NSCW215T
R_sens: Susumu RL0510S-1R8
R_sens
1.8
VIN
3.2 V~4.2 V
C1
10
µF
ON
OFF
IF
20 mA
L1
39
µH
S-Di
C2
1
µF
VCC
A
SHDN
GND
GND
K
L1: TDK LDR344812T-440
S-Di: Toshiba 1SS404 20 V/1A
LED: Nichia NSCW215T
R_sens: Rohm MCR03-1R8
R_sens
1.8
VIN
3.2 V~4.2 V
C1
10
µF
ON
OFF
IF
20 mA
or
16 mA
L1
44
µH
S-Di
C2
1
µF
VCC
A
SHDN
GND
GND
K


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