Diodes AP5726 - Manual (Page 12)

AP5726
WHITE LED STEP-UP CONVERTER
AP5726
Document number: DS31845 Rev. 3 - 2
12 of 17
www.diodes.com
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