AP3583 View Datasheet(PDF) - BCD Semiconductor
Part Name
Description
Manufacturer
AP3583 Datasheet PDF : 13 Pages
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Data Sheet
Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A
Pin Configuration
MP Package
(PSOP-8)
1
8
2
7
3
6
4
5
Figure 2. Pin Configuration of AP3583/A (Top View)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
Pin Name
BOOT
UGATE
OPS
LGATE
VCC
FB
REFIN
PHASE
GND
Function
Bootstrap pin. Connect a bootstrap capacitor (Typically from 0.1
to 0.47µF) from this pin to PHASE pin to create a BOOT voltage
suitable to drive a standard N-Channel MOSFET
Upper-gate drive pin. Connect this pin to the upper MOSFET gate
providing the gate drive. This pin is monitored by the adaptive
shoot-through protection circuitry to determine when the upper
MOSFET has been turned off
Over-current setting pin. Connecting a resistor (ROCSET) between
OPS and GND to set the over-current trigger point
Lower-gate drive pin. Connect LGATE to the lower MOSFET
gate providing the gate drive for the lower MOSFET. This pin is
monitored by the adaptive shoot-through protection circuitry to
determine when the lower MOSFET has been turned off
Bias supply pin. Provides a 5V or 12V bias supply for the chip
from this pin. The pin should be bypassed with a capacitor to
GND
Feedback pin. This pin is the inverting input of the internal error
amplifier. A resistor divider from output to GND is used to set the
output voltage
External reference input pin. This pin receives a voltage with
range from 0.4V to 3.0V as the reference voltage at the
non-inverting input of the error amplifier. Pull this pin lower than
0.3V to disable the controller, and the VUGATE and VLGATE will go
low. Let this pin open for internal 0.6V reference use
PHASE pin. This pin connects to the source of the upper
MOSFET and the drain of the lower MOSFET. This pin is also
monitored by the adaptive shoot-through protection circuitry to
determine when the upper MOSFET is turned off
Exposed pad as ground pin. Represents the signal and power
ground for the IC. Tie this pin to ground island/plane through the
lowest impedance connection available
Dec. 2011 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
2
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