HV850

________________________________________________________________________________

Supertex, Inc.

1/21/04

4

Pin Description

Pin #

Pad

Description

1

Input supply voltage pin.

2

3

EN

Enable input pin. Logic high will turn the device on. An external R-C circuit can be added for a

delayed turn off.

4

Clk-in

Logic input pin. An external logic clock applied to this pad can be used to set the EL lamp

frequency (see Figure 3). This is useful for applications requiring the EL lamp to be

synchronized to a system clock. Connect to ground when no in use.

5

Clk-en

Logic input pin. Logic high will cause the EL lamp frequency to be set by the Clk-in input. Logic

low will cause the EL lamp frequency to be set by the external Rel resistor.

6

Gnd

IC ground pin.

7

8

Figure 1: Typical Applications

µF, 6.3V low ESR

Load

3.0V

8.9mA

53V

3.5V

10.2mA

61V

3.3nF+1K

Ω 1.5MΩ

4.0V

10.4mA

66V

294Hz

Additional Examples

Lamp Size

Brightness

3.0V

8.4mA

53V

7.31cd/m

2

3.5V

9.4mA

62V

10.35cd/m

2

1.0in

2

1.65M

Ω

4.0V

9.9mA

66V

250Hz

12.62cd/m

2

3.0V

5.5mA

62V

11.54cd/m

2

3.5V

5.3mA

68V

14.33cd/m

2

0.5in

2

2.0M

Ω

4.0V

4.9mA

68V

210Hz

14.90cd/m

2

3.0V

5.6mA

62V

8.55cd/m

2

3.5V

5.4mA

67V

10.29cd/m

2

1.0in

2

3.3M

Ω

4.0V

5.0mA

68V

128Hz

10.94cd/m

2

3.0V

4.6mA

64V

8.25cd/m

2

3.5V

4.1mA

68V

9.62cd/m

2

0.5in

2

3.3M

Ω

4.0V

3.8mA

68V

128Hz

9.95cd/m

2

3.0V

4.8mA

64V

6.02cd/m

2

3.5V

4.4mA

68V

7.50cd/m

2

1.0in

2

4.7M

Ω

4.0V

5.0mA

68V

89Hz

10.94cd/m

2

V

DD

V

B

R

EL

GND

V

A

HV850MG

Cdd

+

-

Rel

EN

Clk-in

Clk-en

EL

Lamp

GND=OFF

VDD=ON