AP1530 データシートの表示（PDF） - Diodes Incorporated.
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AP1530 Datasheet PDF : 8 Pages
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AP1530
PWM CONTROL 3A STEP-DOWN CONVERTER
Function Description
PWM Control
The AP1530 consists of DC/DC converters that employ a
pulse-width modulation (PWM) system.
In converters of the AP1530, the pulse width varies in a range
from 0 to 100%, according to the load current. The ripple voltage
produced by the switching can easily be removed through a filter
because the switching frequency remains constant. Therefore,
these converters provide a low-ripple power over broad ranges of
input voltage and load current.
Under Voltage Lockout
The under voltage lockout circuit of the AP1530 assures that the
high-side MOSFET driver outputs remain in the off state
whenever the supply voltage drops below 3.3V. Normal operation
resumes once VCC rises above 3.5V.
RDS(ON) Current Limiting
The current limit threshold is set by the external resistor
connected from VCC supply to OCSET. The internal 100uA sink
current crossing the resistor sets the voltage at the pin of OCSET.
When the PWM voltage is less than the voltage at OCSET, an
over-current condition is triggered.
ILOAD × RDS(ON) = IOCSET × ROCSET
See above formula for setting the current limit value.
Marking Information
( Top View )
8
5
AP1530
YY WW X
1
4
Logo
Part no.
Internal code
Xth week: 01~52
Year: "01" =2001
"02" =2002
Device
AP1530S
Package
SOP-8L
Identification Code
AP1530
AP1530 Rev. 1
7 of 8
www.diodes.com
MARCH 2007
© Diodes Incorporated
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