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PDF AX3164 Data sheet ( Hoja de datos )
| Número de pieza | AX3164 | |
| Descripción | PWM Control 2A Step-Down Controller | |
| Fabricantes | AXElite | |
| Logotipo |  |
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AX3164
PWM Control 2A Step-Down Controller
GENERAL DESCRIPTION
AX3164 is a step-down switching PWM controller. These devise include a reference
voltage source, oscillation circuit, error amplifier. External P-channel MOSFET is need in
application circuit for switching driver.
AX3164 controller provides low-ripple power, high efficiency, and excellent transient
characteristics control. The AX3164 PWM control circuit is able to the duty ratio linearly
form 0 up to 100%. This controller 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 determined external VCC-SENSE resistor, 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 a P-channel Power MOSFET, 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 controller can
accommodate an input voltage up to 58V, it is also suitable for the operation via an AC
adapter.
FEATURES
- Input voltage：10V to 58V
- Output voltage：3.3V to 56V
- Duty ratio：0% to 100% PWM control
- Soft-Start function
- Current limit, Short Circuit Protect (SCP) protection and thermal Shutdown protection
- External SW P-channel MOSFET.
- SOP-8L Pb-Free package.
1/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.0 Jun.20, 2014
1 page  
AX3164
FUNCTION DESCRIPTIONS
SS
This pin can be supplied soft start function. The pin must be connected a capacitor to
ground. There is a 10uA current to charge this capacitor, vary the different capacitor value
to control soft start time.
COMP
Compensation pin. For EL output capacitor application, the COMP pin connects R1
and C7 to ground for all condition; please refer the compensation table.
SENSE
The current limit is set by outside resistance (RSENSE), When the VCC-SENSE voltage
larger than 100mV, the current limit is happened that driver can be turned off. The current limit
set according to the following equation:
Maximum
InductorPeakCurrent
=
70mV
Rsense
APPLICATION INFORMATION
Setting the Output Voltage
Application circuit item shows the basic application circuit with adjustable output
version. The external resistor sets the output voltage according to the following equation:
VOUT 1.0V (1 R4)
R3
Table 1 Resistor select for output voltage setting
VOUT
R3
5V 1.5K
3.3V 1.3K
R4
6K
3K
5/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.0 Jun.20, 2014
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AX3164.PDF ] | |
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