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APW7071 Datasheet(Fiches technique) 2 Page - Anpec Electronics Coropration

Numéro de pièce APW7071
Description  White LED DC/DC Step-Up Converter
Télécharger  15 Pages
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Fabricant  ANPEC [Anpec Electronics Coropration]
Site Internet  http://www.anpec.com.tw
Logo ANPEC - Anpec Electronics Coropration

APW7071 Datasheet(HTML) 2 Page - Anpec Electronics Coropration

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Copyright
© ANPEC Electronics Corp.
Rev. A.1 - Feb., 2006
APW7071
www.anpec.com.tw
2
Pin Description
No
Name
Function
1
SW
Switch Pin. Connect to inductor/diode here. Minimize trace area at this
pin to educe EMI.
2
GND
Ground Pin.
3
FB
Feedback Pin. Reference voltage is 0.25V. Connect cathode of
lowest LED and resistor here. Calculate resistor value according to
RFB = 0.25V/l LED
4
SHDN
Shutdown Pin. Tie to 1.3V or higher to enable device, 0.4V or less to
disable.
5
OVP
Over voltage protection sense pin. Connect this pin to VOUT for over
voltage protection.
6
Vin
Supply voltage Pin.
Block Diagram
Under
Voltage
Lockout
Gate
Driver
Control
Logic
400ns Min.
off-time
Soft
start
6us Max.
on-time
-
+
-
+
OVP
Vref=0.25V
FB(3)
SHDN(4)
GND(2)
VIN(6)
SW(1)
RSENSE
N-MOSFET
Current Limit
Error
Comparator
OVP(5)
-
+
Thermal
Shutdown


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