Microchip SR086DB1 Manual


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Side 1/4
Supertex inc.
Supertex inc.
www.supertex.com
SR086DB1
Doc.# DSDB-SR086DB1
B032014
Board Layout and Connections
Inductorless Switching Off-line
Power Supply Demoboard
Specications
Parameter Value
AC Input (VIN): 90 to 270VAC
45Hz to 65Hz
Output voltages:
VOUT (no load)
VREG
12.6V ± 8%1
3.3V ± 5%
Output current, max:
IREG
IOUT + IREG
120VAC
60mA
100mA
230VAC
60mA
60mA
Efciency, typ.2 (full load): 52% 44%
Standby power, typ. (no load): 62mW 200mW
Introduction:
The Supertex SR086DB1 is an inductorless switching power
supply intended for operation directly from a 120/230VAC
line. Two outputs, 12.6V and 3.3V are provided.
The operating principle is to turn on a pass transistor when
the rectied AC input is below the output voltage, and to turn
it off when the output storage capacitor is charged up to the
regulation point. Since the output capacitor charges up on
the rising edge of a sine wave, reasonable efciencies can
be obtained without the use of magnetics.
Instructions on page 2 and 3 describe how the demoboard
may be modied to better suit applications that are not satis-
ed by the board as provided. For a full description of the
SR086, see the SR086 datasheet.
Notes:
1. Adjustable from 9.0V to 50V.
2. Referenced to V
OUT.
WARNING!!!
Do not connect earth-grounded loads
or test instruments. Doing so will short
the AC line, resulting in damage to the
instrument, load, and/or the SR086 circuit.
U ese floating instruments or high voltag
differential probes. Do not use a
transformer on the AC line.
WARNING!!!
No galvanic isolation.
Dangerous voltages are
present when connect to
the AC line.
VOUT
(12.6V)
VREG (3.3V)
ENABLE
GND
Terminal blocks J1 and J2 may be removed by pulling straight up.
+
D1
Z1
F1 C2
R5
Q1
R2
R3
R4 C3
~ ~
R1
R7
C4
R6 C1
C5
R8
-
VIN
90 - 270VAC
50/60Hz
J2
Supertex SR086DB1
Warning! No galvanic isolation.
Dangerous voltages are present.
Do not connect grounded loads
or test equipment. Do not use
a transformer on the AC line.
VIN
EN
GND
VREG
VOUT
IC1


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: SR086DB1

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