Datenblatt-pdf.com


XL4012 Schematic ( PDF Datasheet ) - Xlsemi

Teilenummer XL4012
Beschreibung 12A 300KHz 32V Buck DC to DC Converter
Hersteller Xlsemi
Logo Xlsemi Logo 




Gesamt 9 Seiten
XL4012 Datasheet, Funktion
12A 300KHz 32V Buck DC to DC Converter
Datasheet
XL4012
Features
„ Wide 5V to 32V Input Voltage Range
„ Output Adjustable from 0.8V to 30V
„ Maximum Duty Cycle 100%
„ Minimum Drop Out 0.6V
„ Fixed 300KHz Switching Frequency
„ 12A Constant Output Current Capability
„ Internal Optimize Power MOSFET
„ High efficiency
„ Excellent line and load regulation
„ Built in thermal shutdown function
„ Built in current limit function
„ Built in output short protection function
„ Available in TO-220 package
Applications
„ LCD Monitor and LCD TV
„ Digital Photo Frame
„ Set-up Box
„ ADSL Modem
„ Telecom / Networking Equipment
General Description
The XL4012 is a 300 KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 12A 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 over
current protection function is built inside.
When short protection function happens, the
operation frequency will be reduced from
300KHz to 60KHz. An internal compensation
block is built in to minimize external
component count.
Figure1. Package Type of XL4012






XL4012 Datasheet, Funktion
12A 300KHz 32V Buck DC to DC Converter
Test Circuit and Layout guidelines
Datasheet
XL4012
Figure5. Standard Test Circuits and Layout Guides
Select R1 to be approximately 2K, use a 1% resistor for best stability.
C1 and CFF are optional; in order to increase stability and reduce the input power line noise, CIN
and C1 must be placed near to VIN and GND;
For output voltages greater than approximately 10V, an additional capacitor CFF is required. The
compensation capacitor is typically between 100 pf and 33 nf, and is wired in parallel with the
output voltage setting resistor, R2. It provides additional stability for high output voltage, low
input-output voltages, and/or very low ESR output capacitors, such as solid tantalum capacitors.
CFF=1/(31*1000*R2); This capacitor type can be ceramic, plastic, silver mica, etc. (Because of
the unstable characteristics of ceramic capacitors made with Z5U material, they are not
recommended.)

6 Page







SeitenGesamt 9 Seiten
PDF Download[ XL4012 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
XL401212A 300KHz 32V Buck DC to DC ConverterXlsemi
Xlsemi
XL40134A 180KHz 36V Buck DC to DC ConverterXlsemi
Xlsemi
XL40155A 180KHz 36V Buck DC to DC ConverterXlsemi
Xlsemi
XL40168A 180KHz 40V Buck DC to DC ConverterXlsemi
Xlsemi

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche