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PDF XL4301 Data sheet ( Hoja de datos )
| Número de pieza | XL4301 | |
| Descripción | 3A 180KHz 45V Buck DC/DC Converter | |
| Fabricantes | XLSEMI | |
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Hay una vista previa y un enlace de descarga de XL4301 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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XLSEMI
3A 180KHz 45V Buck DC/DC Converter With Constant Current Loop
Datasheet
XL4301
Features
Operation Voltage from 8V to 40V
Adjust VOUT from 1.25V to VIN-2V
Minimum Drop Out 0.3V
Fixed 180KHz Switching Frequency
Maximum 3A Switching Current
Internal Optimize Power MOSFET
Excellent line and load regulation
With output constant current loop
Built in thermal shutdown function
Built in current limit function
Built in output cable compensation
Recommend output power less than 13W
SOP8-EP (Exposed PAD) package
Applications
Car Charger
Battery Charger
LCD Monitor and LCD TV
Portable instrument power supply
Telecom / Networking Equipment
Buck constant current driver
General Description
The XL4301 is a 180KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 2.5A load with high
efficiency, low ripple and excellent line and
load regulation. Requiring a minimum
number of external components, the regulator
is simple to use and include internal
frequency compensation and a
fixed-frequency oscillator.
The PWM control circuit is able to adjust the
duty ratio linearly from 0 to 100%. An enable
function, an over current protection function
is built inside. An internal compensation
block is built in to minimize external
component count.
The XL4301 built in a simple,
user-programmable output cable voltage drop
compensation function. Use the curve in
Table 2 to choose the proper compensation
resistance values for cable compensation.
Rev1.0
Figure1. Package Type of XL4301
www.xlsemi.com
1
1 page  
XLSEMI
Datasheet
3A 180KHz 45V Buck DC/DC Converter With Constant Current Loop
XL4301
XL4301 Electrical Characteristics
Ta = 25 ;unless otherwise specified.
Symbol Parameter
Test Condition
System parameters test circuit figure4
VFB
Efficiency
Feedback
Voltage
ŋ
Vin = 8V to 40V, Vout=5V
Iload=0.2A to 2A
Vin=12V ,Vout=5V
Iout=2.5A
Min. Typ. Max. Unit
1.231 1.25 1.269 V
- 88 - %
Electrical Characteristics (DC Parameters)
Vin = 12V, GND=0V, Vin & GND parallel connect a 100uF/50V capacitor; Iout=500mA, Ta =
25 ; the others floating unless otherwise specified.
Parameters
Symbol Test Condition Min. Typ. Max. Unit
VIN operation voltage
Vin
8 40 V
VIN UVLO
Vuvlo
5V
Quiescent Supply Current
Iq
VFB =Vin
2 5 mA
Oscillator Frequency
Fosc
153 180 225 KHz
Switch Current Limit
IL
Output Power PMOS
Rdson
Constant current sense
Voltage
Thermal Shutdown
temperature
Thermal Shutdown
Hysteresis
VCS
OTP
VFB =0
VFB=0V, Vin=12V,
ISW=3A
104.5
3.5 A
75 100 mohm
110 115.5 mV
165 ºC
40 ºC
Rev1.0
www.xlsemi.com
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet XL4301.PDF ] | |
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