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PDF SR10 Data sheet ( Hoja de datos )
| Número de pieza | SR10 | |
| Descripción | CCSS Regulator | |
| Fabricantes | Supertex | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SR10 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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Supertex inc.
SR10
Capacitor-Coupled,
Switched Shunt, (CCSS) Regulator
Features
► Efficiencies up to 75% at 20mA
► Less than 20mW standby power
► Optional 6.0V, 12V or 24V fixed output
voltage, or adjustable from 6.0V to 28V
► Output current scalable up to 50mA
► 120VAC to 240VAC input
► No magnetics
► Inherent short circuit protection
Applications
► Household appliances
► White goods
► Lighting controls
► Utility meters
General Description
The Supertex SR10 is a non-isolated, capacitor-coupled, switched shunt
regulator designed to operate directly from the AC line. Output voltage
can be either fixed at 6.0V, 12V, or 24V using an internal feedback divider
or be adjusted over a 6.0V to 28V range using an external feedback
divider. Output current capability is scalable to 50mA, by selection of
the series coupling capacitor (CS) on the AC line. Standby power can
be under 20mW, and efficiencies of 75% are possible depending upon
configuration and degree of transient protection.
All components except for CS are low voltage, easing PCB layout and
alleviating high voltage creepage concerns.
Inherent short circuit protection is afforded by the reactance of the CS
series capacitor, which limits current even with a dead short on the
output. Overcurrent protection (OCP) shuts off the shunt during a line
transient.
Refer to application note AN-H65 for further information.
Typical Application Circuits
Full-wave Rectification
RLIM
CS
VIN
90 - 275VAC
50 - 60Hz
RBL
D1 - 4
DOUT
SH OUT
D6
D12
SR10 D24
FB
PGND AGND
CFB
470pF
Half-wave Rectification
RLIM
CS
DOUT
VIN
90 - 275VAC
50 - 60Hz
H
N
RBL
DSH
SH OUT D6
D12
SR10 D24
FB
PGND AGND
CFB
470pF
VOUT
fixed 6V, 12V, 24V
RFB1 or adj 6V - 28V
COUT
Output Voltage
Selection
RFB2
RTN
Output Voltage
Selection
RFB1
RFB2
VOUT
fixed 6V, 12V, 24V
or adj 6V - 28V
COUT
RTN
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
Free Datasheet http://www.datasheet-pdf.com/
1 page  
SR10
Application Information
The SR10 is a capacitor-coupled, switched shunt regulator.
Capacitor-coupling to the AC line limits input current due to
the finite charge per cycle that can be transferred. Contrast-
ing with a traditional Zener shunt, the switched shunt oper-
ates either fully on or fully off, resulting in low standby power
consumption.
Simplified Schematic
CS CtraSnlismfeitrspinepr uctycculer.rent via finite charge
No power losses in charge transfer.
Timing
VOUT
VSYNC
0V
VREG
VOUT
0V
VIN
Shunt operates either fully on or fully off.
No power-wasting linear operation.
VThSHisifwnaovtecfloarmmpdeodebsyntohteesxhisutnitnnaonr abcytuVaOlUTS.RP1ro0vpidoewdebr ysurepfpelrye. nce.
1
26
10
VOUT
COUT
RTN
1. Output voltage decays under load
until ...
2. it hits the regulation point which...
3. turns off the shunt...
4. freeing VSH to rise...
5. until it is clamped by VOUT where...
6. Input current flows to the output,
causing VOUT to rise...
7. until VSH falls below VOUT.
8. When it reaches VSYNC...
9. the shunt is turned on and current
no longer flows to the output.
10. The cycle repeats.
VOUT
VSYNC
0V
VSH
57
8
4
ON
OFF
QSH
39
Not to scale.
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
5
Free Datasheet http://www.datasheet-pdf.com/
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet SR10.PDF ] | |
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