Ap5726, White led step-up converter, Applications information – Diodes AP5726 User Manual
Page 12
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AP5726
WHITE LED STEP-UP CONVERTER
AP5726
Document number: DS31845 Rev. 3 - 2
12 of 17
July 2010
© Diodes Incorporated
Applications Information
(Continued)
D4
LED
D3
LED
VOUT
D5
LED
D2
LED
C2
1uF
L1
22uH
C1
1uF
R1
15ohm
VIN
D7
LED
ON OFF
U1
AP5726
1
2
3
6
4
5
SW
GND
FB
Vin
EN
OVP
D6
LED
D1
B0540WS
Table 2. Suggested Inductors
Vendor
Inductors
(uH)
Current Rating
(A)
Type
Dimensions
(mm)
Series
Wurth Electronics
22
0.51A
SMD
3.8X 3.8 X 1.6
744031220
GOTREND
22
0.56A
SMD
3.8 X 3.8 X 1.05
GLP3810PH220N
TAIYO YUDRN
22
0.51A
SMD
4.0 X 4.0 X 1.25
NR4012
Table 3. Suggested Capacitors for C
IN
and C
OUT
Vendor
Capacitance
Type
Series
TAIYO YUDEN
1uF
SMD
TMK212 B7105MG-T
Table 4. Suggested Diodes
Vendor
Rating
Type
Series
ZETEX 40V/0.5A SOD323
ZLLS400
DIODES 40V/0.5A SOD323
B0540WS
DIODES 40V/0.25A SOD523
SDM20U40
Table 5. Suggested Resistor
Vendor
Type
Series
YAGEO SMD FR-SK
Table 6. Suggested W-LED
Vendor
Type
Series
LITEON SMD
LTW-C1911UC5