Diodes AP1510 Manuel d'utilisateur

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AP1510
PWM CONTROL 3A STEP-DOWN CONVERTER
AP1510 Rev. 7 1 of 9 JULY 2009
DS31018 www.diodes.com © Diodes Incorporated
Input voltage: 3.6V to 23V
Output voltage: 0.8V to V
CC
.
Duty ratio: 0% to 100% PWM control
Oscillation frequency: 300kHz typ.
Current Limit, Enable function
Thermal Shutdown function
Built-in internal SW P-channel MOS
SOP-8L Pb-Free Package
SOP-8L: Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
AP1510 consists of step-down switching regulator with PWM
control. These devices include a reference voltage source,
oscillation circuit, error amplifier and internal PMOS.
AP1510 provides low-ripple power, high efficiency and excellent
transient characteristics. The PWM control circuit is able to vary
the duty ratio linearly from 0 up to 100%. This converter also
contains an error amplifier circuit. An enable function, an over
current protection and a short circuit protection are built inside,
when OCP or SCP happens, the operation frequency will be
reduced from 300kHz to 30kHz. Also, an internal compensation
block is built in to minimum external component count.
With the addition of an internal P-channel Power MOS, a coil,
capacitors, and a diode connected externally, these ICs can
function as step-down switching regulators. They serve as ideal
power supply units for portable devices when coupled with the
SOP-8L package, providing such outstanding features as low
current consumption. Since this converter can accommodate an
input voltage up to 23V, it is also suitable for the operation via an
AC adapter.
Cellular Phones
PC Motherboard
LCD Monitor
Graphic Card
DVD-Video Player
Telecom Equipment
ADSL Modem
Printer and other Peripheral Equipment
Microprocessor core supply
Networking power supply
Typical Application Circuit
AP1510
+
-
V
SS
EN
C
C
R
A
R
B
D1
FB
Vcc
Output
CVcc
V
OUT
=5V/3A
V
IN
R
OCSET
OCSET
C
OUT
C
IN
Optional
C
OCSET
C
EN
R
EN
Option
100K
Note: V
OUT
= V
FB
x (1+R
A
/R
B
)
R
B
=0.7K~5K ohm
L1
22uH
6.8K
1.3K
3.9K
0.1uF
+
-
C
0.1uF 470uF
470uF
0.1uF
Features
General Description
Applications
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Résumé du contenu

Page 1 - Diodes Incorporated

AP1510PWM CONTROL 3A STEP-DOWN CONVERTER AP1510 Rev. 7 1 of 9

Page 2 - Pin Descriptions

AP1510PWM CONTROL 3A STEP-DOWN CONVERTER AP1510 Rev. 7 2 of 9

Page 3 - Absolute Maximum Ratings

AP1510PWM CONTROL 3A STEP-DOWN CONVERTER AP1510 Rev. 7 3 of 9

Page 4 -

AP1510PWM CONTROL 3A STEP-DOWN CONVERTER AP1510 Rev. 7 4 of 9

Page 5 - AP1510 Efficiency

AP1510PWM CONTROL 3A STEP-DOWN CONVERTER AP1510 Rev. 7 5 of 9

Page 6 - Test Circuit

AP1510PWM CONTROL 3A STEP-DOWN CONVERTER AP1510 Rev. 7 6 of 9

Page 7 - Functional Description

AP1510PWM CONTROL 3A STEP-DOWN CONVERTER AP1510 Rev. 7 7 of 9

Page 8 - Marking Information

AP1510PWM CONTROL 3A STEP-DOWN CONVERTER AP1510 Rev. 7 8 of 9

Page 9

AP1510PWM CONTROL 3A STEP-DOWN CONVERTER AP1510 Rev. 7 9 of 9

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