Ap3595, Performance characteristics, Application information – Diodes AP3595 User Manual
Page 10
AP3595
Document number: DS36749 Rev. 1 - 2
10 of 23
January 2014
© Diodes Incorporated
AP3595
A Product Line of
Diodes Incorporated
Performance Characteristics
(Cont.)
VID Change
Application Information
1. Overview
AP3595 is a dual-phase synchronous-rectified buck controller designed to deliver high quality output voltage for high power applications. It is
capable of delivering up to 60A output current with embedded bootstrapped drivers that support 12V+12V driver capability. The built-in bootstrap
diode simplifies the circuit design and reduces external part count and PCB space.
The output voltage is precisely regulated to the reference input that is dynamically adjustable by external voltage divider. The adjustable current
balance is achieved by R
DS(ON)
current sensing technique.
AP3595 features comprehensive protection functions including over current protection, input/output under voltage protection, over voltage
protection and over temperature protection.
Other features include adjustable soft start, adjustable operation frequency, and quick response to step load transient. With aforementioned
functions, the IC provides customer a compact, high efficiency, well-protected and cost effective solution.
2. Power on Reset
A Power On Reset (POR) circuitry continuously monitors the supply voltage at VCC. Once the rising POR threshold is exceeded, the AP3595 sets
itself to active state and is ready to accept chip enable command. The rising POR threshold is typically 9V.
3. Soft Start
The AP3595 initiates its soft start cycle when the RT/EN pin is released from ground once the POR is granted as shown in Figure 1.
Figure 1. Soft Start Cycle (R
DRP
=0)
V
ID
5V/div
Time 2ms/div
V
OUT
200mV/div