SR036MG Ver la hoja de datos (PDF) - Supertex Inc

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componentes Descripción

Fabricante

SR036MG

Inductorless, Dual Output Off-Line Regulators

Supertex Inc 

Applications Information, continued

SR036/SR037

120VA C

or

230VA C

Fuse

ON/OFF

GN2470

1KΩ

1.0µF

220µF

VUNREG

Gate

Source

HVIN SR036 VOUT

or SR037

GND

TN2106K1

1.0µF

VREG

Figure 2: Example Circuit with Enable Control

Figure 2 is an example circuit using the SR036 or SR037 along

with a Supertex GN2470 IGBT to generate an unregulated

voltage of approximately 18V and a regulated voltage of 3.3V for

the SR036 or 5.0V for the SR037. The combined total output

current is typically 50mA. The TN2106K1 in series with a 1Ký

resistor can be added for applications requiring an enable

control.

120VA C

or

230VA C

Fuse

GN2470

1.0µF

220µF

Gate

Source

HVIN SR036 V OUT

GND

1.0µF

2N3904

10KΩ

Vz

5.6V

1.0MΩ

Vout1 = 5.0V

1.0µF

Vout2 = 3.3V

Figure 3: Generating Two Regulated Voltages

For applications requiring two regulated voltages, an inexpen-

sive discrete linear regulator can be added to regulate the

unregulated output as show in Figure 3. The discrete linear

regulator consists of a Zener diode, a resistor and a bipolar

transistor. The regulated voltage, Vout1, is determined by the

Zener diode voltage minus the base-to-emitter voltage drop of

0.6V. Figure 3 uses a 5.6V Zener diode to obtain a 5.0V output.

Different Zener diode voltages can be used to obtain different

regulated output voltages.

B092005

9

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