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PDF XL4201 Data sheet ( Hoja de datos )
| Número de pieza | XL4201 | |
| Descripción | 3A 150KHz 40V Buck DC/DC Converter | |
| Fabricantes | Xlsemi | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de XL4201 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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XLSEMI
3A 150KHz 40V Buck DC/DC Converter With Constant Current Loop
Datasheet
XL4201
Features
n Wide 8V to 40V Input Voltage Range
n Output Adjustable from 1.25V to 37V
n Minimum Drop Out 0.3V
n Fixed 150KHz Switching Frequency
n Maximum 3A Switching Current
n Internal Optimize Power MOSFET
n Excellent line and load regulation
n With output constant current loop
n Built in thermal shutdown function
n Built in current limit function
n Built in input over voltage protection
n Recommend output power less than 13W
n SOP8-EP (Exposed PAD) package
Applications
n Car Charger
n Battery Charger
n LCD Monitor and LCD TV
n Portable instrument power supply
n Telecom / Networking Equipment
n Buck constant current driver
n Monitor LED Backlighting
n General purpose LED lighting
General Description
The XL4201 is a 150KHz 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.
Rev2.0
Figure1. Package Type of XL4201
1
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1 page  
XLSEMI
Datasheet
3A 150KHz 40V Buck DC/DC Converter With Constant Current Loop
XL4201
XL4201 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=2.4A
Min. Typ. Max. Unit
1.231 1.25 1.269 V
- 89 - %
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
VIN OVP
Vovp
45 V
Quiescent Supply Current
Iq
VFB =Vin
2 5 mA
Oscillator Frequency
Fosc
127 150 172 KHz
Switch Current Limit
IL
Output Power PMOS
Rdson
Constant current sense
Voltage
VCS
VFB =0
VFB=0V, Vin=12V,
ISW=3A
104.5
3.5 A
75 100 mohm
110 115.5 mV
Rev2.0
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5
5 Page 
XLSEMI
Datasheet
3A 150KHz 40V Buck DC/DC Converter With Constant Current Loop
XL4201
Typical System Circuit(VIN=8V~40V,IOUT=1000mA)
VIN 8
2 SW
L1 100uH/3A
ILED=0.11V/RCS
LED OVP=1.3*VOUT=1.3*{1.25*(1+R2/R1)}
VIN
8V~40V
CIN C1
100uF/50V 105
CC XL4201
105
VC 7
3
GND
4 FB
5
CS
D1
B540C
R2
39K
C2 COUT
1%
105 220uF/35V
R1
3K
1%
RCS
0.11Ω
1%
Figure20. XL4201 System Parameters Test Circuit (VIN=8V~40V,IOUT=1000mA)
100
95
90
85
80
75
70
65
60
55
50
45
40
1
Efficiency VS LED String
VIN=8V,IOUT=1000mA
VIN=12V,IOUT=1000mA
VIN=24V,IOUT=1000mA
VIN=36V,IOUT=1000mA
23
LED String(N*3W)
4
Figure21. XL4201 System Efficiency Curve (VIN=8V~40V,IOUT=1000mA)
Rev2.0
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11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet XL4201.PDF ] | |
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