AP5726_10 Datasheet, PDF (12/17 Pages) Diodes Incorporated – WHITE LED STEP-UP CONVERTER

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