SR037SG(2002) Ver la hoja de datos (PDF) - Supertex Inc
Número de pieza
componentes Descripción
Fabricante
SR037SG Datasheet PDF : 7 Pages
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Applications Information, continued
120VAC
or
240VAC
Fuse
VN2460N8
Unregulated Voltage
220µF
Vz
5.1V
Gate Source
HVIN SR037 VOUT 5.0V
GND
1µF
Logic
Control
Circuit
SR036/SR037
5V Coil
Relay
Figure 6: Driving 5V Relay Coils with Zener Diode Clamp
The circuit shown in Figure 6 uses the SR037 to supply a
regulated 5.0V for the logic control circuitry. A 5.1V Zener diode
is used in parallel with the 5.0V relay coil to ensure that the relay
coil’s maximum operating voltage is not exceeded. The Zener
diode also acts as the catch diode when the coil is switched to the
off state. An external series resistor is used to limit the amount
of Zener current.
Fuse
120VAC
TN2425N8
Unregulated Voltage
220µF
Gate Source
HVIN SR036 or VOUT
SR037
GND
VREG
1µF
330Ω
Figure 7: Driving LEDs from 120VAC
The circuit shown in Figure 7 uses the SR036 or SR037 to drive
12 high efficient red LEDs from a 120V AC line. The average LED
current is approximately 20mA.
330Ω
©2002 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited.
7
06/13/02rev.12
1235 Bordeaux Drive, Sunnyvale, CA 94089
TEL: (408) 744-0100 • FAX: (408) 222-4895
www.supertex.com
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