Microchip SR10 Manual

Microchip Ikke kategoriseret SR10

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Side 1/4

Supertex inc.

www.supertex.com

SR10DB1

Doc.# DSDB-SR10DB1

A040113

- DC Output +

24V

12V

ADJ

HIGH EVOLTAG

Supertex SR10DB1

OUT

AC Input

90-275VRMS

50/60Hz

–

Load

FB1

and R

FB2

optional for output voltages other

than 6, 12, or 24V. Adjustment range is 6 - 28V.

Pre-configured for 9V. Pads for 0603 and 0805.

DC Output:

6, 12, 24V or

adjustable 6 - 28V.

Jumper-selectable full-wave

or half-wave rectification.

Both jumpers must be in the

same position, left or right.

Jumper-selectable output voltage.

Jumper must be present. When in

the ADJ position, R

FB1

and R

FB2

must be present.

Output minus is

connected to AC line

neutral when configured

for half-wave rectification.

FB1

FB2

LIM

OUT

One lead must always

be in this position

Socketed components.

Accomodates various capacitor sizes

H Input N AC

Rect

Half

Full

OUT

Board Layout and Connection Diagram

Inductorless Switching

Power Supply Demoboard

Specications

Parameter Value

AC Input

90VAC to 275VAC

50Hz to 60Hz

Output voltage

6V, 12V, 24V ±10%

or 6-28V using divider

Output current

up to 50mA

No-load input power

as low as 20mW

Efciency

up to 75%

Actual board size 88mm x 28mm

Introduction:

The Supertex SR10 is an inductorless switching power sup-

ply controller intended for operation directly from a rectied

120/240VAC line. Due to the capacitor-coupled, switched

shunt topology (CCSS), it exhibits low standby power and

good efciency while employing no magnetics nor high volt-

age electrolytic capacitors.

To meet a wide variety of applications, the SR10DB1 is

highly congurable. Many components are socketed. Half or

full-wave rectication is jumper-selectable. Output voltage is

jumper-selectable to 3 xed voltages or may be set anywhere

in the range of 6 - 28V using an on-board feedback divider.

AC Input (H and N)

Connect to the AC line. The ‘H’ terminal should be connected

to the AC line hot conductor. The ‘N’ terminal should be con-

nected to the AC line neutral conductor. When congured for

half-wave rectication, the N terminal is connected to the DC

output minus (–) terminal.

DC Output (+ and –)

Connect the load to these terminals. Do not connect earth-

grounded loads or test equipment without using an isolation

transformer on the AC line.

Output voltage is jumper-selectable at 6, 12, or 24V, or it

may be set in the range of 6 - 28V using the R

feedback

divider and setting the jumper to ADJ.

Notes:

1. Dependent upon conguration and degree of transient protection.

SR10DB1

Supertex inc.

www.supertex.com

Doc.# DSDB-SR10DB1

A040113

Schematic

1-4

1N4001

LIM

fixed 6, 12, 24, or 9V

(adjustable from 6 - 28V via R

FB1

)

OUT

1.0mF

FB1

422kΩ

OUT

1N4001

90-275VAC

50-60Hz

OUT

SR10

PGND

AGND

D12

D24

470pF

24V

12V

ADJ

OUT

FB2

68.1kΩ

Rect

Half Full

Designation Description Value Rating Mfg PN

LIM

Resistor, fusible 2W —22Ω any

Resistor 1/4W —4.7MΩ any

FB1

Resistor 1/4W —422kΩ any

FB2

Resistor 1/4W —68.1kΩ any

Capacitor, lm 220nF to 2.2µF 275VAC,X2 —any

OUT

Capacitor, alum 220µF min —35V any

Capacitor, ceramic NPO 470pF 6V —any

1 - 4

Rectier any—1A, 50V 1N4001

OUT

Rectier any—1A, 50V 1N4001

CCSS regulator — — Supertex SR10

Bill of Materials

Socketed Components

The SR10DB1 is provided with all components pre-installed.

Other components may be substituted for the on-board com-

ponents to meet other requirements.

Refer to the above schematic and BOM, and the drawing

and photo on page 1 to determine the proper locations for

the components.

Output Voltage

Fixed output voltages of 6V, 12V, or 24V may be selected by

setting the appropriate jumper on the V

OUT

header.

For other output voltages, the on-board resistive feedback

divider may be used to provide any voltage in the range of

6 - 28V. To maintain a minimum 15µA through the feedback

divider, only R

FB1

should be changed.

FB1

= R

FB2

OUT

-1 = 68.1kΩ

OUT

-1

1.25V

Output Current (C

selection)

Output current is primarily dependent on input voltage, C

value, and rectication (full or half). Given the minimum input

voltage and choice of rectication, the minimum value of C

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	SR10

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