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AX3163 데이터시트 PDF




AXElite에서 제조한 전자 부품 AX3163은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 AX3163 자료 제공

부품번호 AX3163 기능
기능 PWM Control 3A Step-Down Converter
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AX3163 데이터시트, 핀배열, 회로
AX3163
PWM Control 3A Step-Down Converter
GENERAL DESCRIPTION
AX3163/A consists of step-down switching regulator with PWM control. These devise
include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and
etc.
AX3163/A provides low-ripple power, high efficiency, and excellent transient
characteristics. The PWM control circuit is able to the duty ratio linearly form 0 up to 100%.
This converter is build out soft start function that prevents overshoot and inrush current at
startup. An over current protect function and short circuit protect function are built inside,
and when OCP or SCP happens, the operation frequency will be reduced. An external
compensation is easily to system stable; the low ESR output capacitor can be used.
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-16L with
exposed pad package, providing such outstanding features as low current consumption.
Since this converter can accommodate an input voltage up to 58V, it is also suitable for the
operation via an AC adapter.
FEATURES
- Input voltage10.8V to 58V
- Output voltage3.3V to 56V
- Duty ratio0% to 100% PWM control
- Enable and Soft-Start function
- Current Limit, Short Circuit Protect (SCP) and Thermal Shutdown protection
- Built-in internal SW P-channel MOS.
- SOP-16L-EP Pb-Free package.
1/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Dec.13, 2011




AX3163 pdf, 반도체, 판매, 대치품
AX3163
ELECTRICAL CHARACTERISTICS
(VCC = 24V, TA=25°C, unless otherwise specified)
Characteristics
Symbol
Conditions
Feedback Voltage
Quiescent Current
VFB IOUT=10mA
ICCQ
VFB=1.2V
force driver off
Feedback Bias Current
IFB IOUT=0.1A
Shutdown Supply Current
ISD VEN =0V
Line Regulation
VOUT/VOUT
VCC =10.8V~58V,
IOUT=10mA
Load Regulation
VOUT/VOUT IOUT = 0.2 to 3A
Current Limit
ICL
Oscillator frequency
FOSC AX3163
FOSC AX3163A
FOSC1 AX3163 ICL
Short frequency
EN Pin Logic input threshold
FOSC1
FOSC2
VSH
AX3163A ICL
AX3163/AX3163A
VFB < 0.3
High (regulator ON)
voltage
VSL Low (regulator OFF)
EN Pin Input Current
ISH VEN=2.5V (ON)
ISL VEN=0.3V (OFF)
SS Current
ISS VSS=0V
Internal MOSFET RDSON
RDSON VCC=12V, 1A,VFB=0V
Efficiency (AX3163)
EFFI
VCC = 24V,
VOUT = 5V, IOUT = 3A
Min Typ Max Units
0.98 1.00 1.02 V
- 3 6 mA
- 0.1 0.5 uA
- 0.5 1 mA
- 0.3 0.6 %
- 0.3 0.6 %
3.5 - - A
90 120 150 KHz
200 250 300 KHz
- 50 - KHz
- 110 - KHz
- 30 - KHz
2.0 - - V
- - 0.8
- 5 - uA
- 5 - uA
- 10 - uA
- 90 150 m
- 90 - %
4/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Dec.13, 2011

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AX3163 전자부품, 판매, 대치품
AX3163
Output Capacitor Selection
The output capacitor is required to filter the output and provide regulator loop stability.
The important capacitor parameters are; the 100 KHz Equivalent Series Resistance (ESR),
the RMS ripples current rating, voltage rating, and capacitance value. For the output
capacitor, the ESR value is the most important parameter. The ESR can be calculated from
the following formula.
V I   ESR = 0.4A x 80m= 32mV
RIPPLE
L
An aluminum electrolytic capacitor's ESR value is related to the capacitance and its
voltage rating. In most case, higher voltage electrolytic capacitors have lower ESR values.
Most of the time, capacitors with much higher voltage ratings may be needed to provide
the low ESR values required for low output ripple voltage. It is recommended to replace
this low ESR capacitor by using a 470µF low ESR values < 80mΩ.
7/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Dec.13, 2011

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