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Teilenummer | XL4301 |
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Beschreibung | 3A 180KHz 45V Buck DC/DC Converter | |
Hersteller | XLSEMI | |
Logo | ||
Gesamt 10 Seiten 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
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1
XLSEMI
3A 180KHz 45V Buck DC/DC Converter With Constant Current Loop
Typical System Application (Car Charger)
Datasheet
XL4301
Figure5. XL4301 System Parameters Test Circuit (VIN=8V~40V, VOUT=5V/0.1A~2.5A)
Output voltage VS Output current
5.5
5.0
4.5
4.0
3.5
3.0 VIN=8V,VOUT=5V,IOUT=0.1A~2.8A
2.5 VIN=12V,VOUT=5V,IOUT=0.1A~2.8A
VIN=24V,VOUT=5V,IOUT=0.1A~2.8A
2.0 VIN=36V,VOUT=5V,IOUT=0.1A~2.8A
1.5
1.0
0.5
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
Output current(A)
Figure6. Output Constant Current Curve
Efficiency VS Output current
100
95
90
85
80
75
70
65 VIN=8V,VOUT=5V,IOUT=0.1A~2.5A
60 VIN=12V,VOUT=5V,IOUT=0.1A~2.5A
VIN=24V,VOUT=5V,IOUT=0.1A~2.5A
55 VIN=36V,VOUT=5V,IOUT=0.1A~2.5A
50
45
40
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50
Output current(A)
Figure7. Efficiency Curve
Output voltage VS Output current
5.3
5.2
5.1
5.0
4.9 VIN=8V,VOUT=5V,IOUT=0.1A~2.5A
VIN=12V,VOUT=5V,IOUT=0.1A~2.5A
VIN=24V,VOUT=5V,IOUT=0.1A~2.5A
4.8 VIN=36V,VOUT=5V,IOUT=0.1A~2.5A
4.7
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6
Output current(A)
Figure8. Line&Load regulation Curve
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-50
-25
0
25 50 75 100 125
Figure9. Feedback voltage Curve
Rev1.0
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6 Page | ||
Seiten | Gesamt 10 Seiten | |
PDF Download | [ XL4301 Schematic.PDF ] |
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