HV830LG Ver la hoja de datos (PDF) - Supertex Inc

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componentes Descripción

Fabricante

HV830LG

High Voltage EL Lamp Driver

Supertex Inc 

Figure 1: Test Circuit, VIN = 3.0V

ON = VDD

OFF = 0V

5.1MΩ

VDD = VIN = 3.0V

220µH1

1MΩ

BAS21LT1

0.1µF2

0.01µF

200V

1 VDD REL-osc 8

2 RSW-osc

VA 7

3 Cs

VB 6

4 Lx

GND 5

HV830

1nF

10 square inch lamp.

Notes:

1. Murata part # LQH4N221K04 (DC resistance < 5.4Ω)

2. Larger values may be required depending upon supply impedance.

For additional information, see Application Notes AN-H33 and AN-H34.

HV830

Enable/Disable Configuration

The HV830 can be easily enabled and disabled via a logic control

signal on the RSW and REL resistors as shown in Figure 2 below.

The control signal can be from a microprocessor. RSW and REL

are typically very high values. Therefore, only 10’s of microam-

peres will be drawn from the logic signal when it is at a logic high

(enable) state. When the microprocessor signal is high the

device is enabled and when the signal is low, it is disabled.

Figure 2: Enable/Disable Configuration

ON =VDD

OFF = 0V

Remote

Enable

REL

+

VIN = VDD

-

RSW

Lx

BAS21LT1

4.7µF

15V

CS

200V

1 VDD REL-osc 8

2 RSW-osc

VA 7

3 Cs

VB 6

4 Lx

GND 5

HV830LG

1nF

EL Lamp

Split Supply Configuration Using a Single

Cell (1.5V) Battery

The HV830 can also be used for handheld devices operating

from a single cell 1.5V battery where a regulated voltage is

available. This is shown in Figure 3. The regulated voltage can

be used to run the internal logic of the HV830. The amount of

current necessary to run the internal logic is typically 100µA

at a VDD of 3.0V. Therefore, the regulated voltage could easily

provide the current without being loaded down. The HV830

used in this configuration can also be enabled/disabled via

logic control signal on the RSW and REL resistors as shown in

Figure 2.

Split Supply Configuration for Battery

Voltages of Higher than 9.5V

Figure 3 can also be used with high battery voltages such as 12V

as long as the input voltage, VDD, to the HV830 device is within

its specifications of 2.0V to 9.5V.

3

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