AP1509-XXS Ver la hoja de datos (PDF) - Diodes Incorporated.
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AP1509-XXS Datasheet PDF : 12 Pages
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AP1509
150KHz, 2A PWM BUCK DC/DC CONVERTER
Typical Application Circuit
(1) Fixed Type Circuit
12V
DC Input
Cin
Capacitor
FB
1
Vin
4
3
AP1509
-33
2
5 6 78
Output
L1
47uH
Inductor
SD GNDGNDGNDGND
D1
Schottky Diode
3.3V/2A
Output Load
Co
Capacitor
(2) Adjustable Type Circuit
12V
DC Input
Cin
Capacitor
R2 1K
R1 1K
FB
3
1 AP1509
Vin
Output
2
L1
39uH
Inductor
4 56 78
SD Gnd GndGnd Gnd
D1
Schottky
Diode
2.5V/2A
Output Load
Co
Capacitor
(3) Delay Start Circuit
12V
DC Input
Cin
Capacitor
Vout = VFB × (1 + R1 )
R2
VFB = 1.23V
R2 = 1K ~ 3K
R2 1K
R1 1K
FB
3
Vin
Output
1 AP1509 2
CDELAY 4
0.1uF
56
78
SD Gnd GndGnd Gnd
RDELAY
10K
L1
39uH
Inductor
D1
Schottky
Diode
2.5V/2A
Output Load
Co
Capacitor
AP1509 Rev. 1
6 of 12
www.diodes.com
DECEMBER 2006
© Diodes Incorporated
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