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HV833, HV833MG/H833, HV839MG

Table of contents:
Info of HV833
Info of HV833MG/H833
Info of HV839MG

HV833, HV833MG/H833, HV839MG Selling Leads, Datasheet

MFG:HV Package Cooled:MSOP-8 D/C:04+

HV833, HV833MG/H833, HV839MG Datasheet download

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Part Number: HV833

MFG: HV

Package Cooled: MSOP-8

D/C: 04+

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HV833 General Description

The Supertex HV833 is a high voltage driver designed for driving EL lamps of up to 35nF (10-12in2). The input supply voltage range is from 1.8V to 6.5V. The device uses a single inductor and a minimum number of passive components. The nominal regulated output voltage that is applied to the EL lamp is ±90V. The chip can be enabled/disabled by connecting the resistor on R _SW-OSC to V_DD/ground.

The HV833 has two internal oscillators, a switching MOSFET, and a high voltage EL lamp driver. The frequency for the switching MOSFET is set by an external resistor connected between the R _SW-osc pin and the supply pin V_DD. The EL lamp driver frequency is set by an external resistor connected between R _EL-osc pin and the V_DD pin. An external inductor is connected between the LX and V_DD or VIN pins. A 0.003-0.1F capacitor is connected between CS and ground. The EL lamp is connected between VA and VB.

The switching MOSFET charges the external inductor and discharges it into the capacitor at C_S. The voltage at C_S will start to increase. Once the voltage at C_S reaches a nominal value of 90V, the switching MOSFET is turned OFF to conserve power. The outputs V_A and V_B are configured as an H bridge and are switching in opposite states to achieve 180V peak-to-peak across the EL lamp.

HV833 Maximum Ratings

Supply Voltage, V_DD                       -0.5V to +7.5V
Output Voltage, V_Cs                      -0.5V to +100V
Operating Temperature Range      -25° to +85°C
Storage Temperature Range   -65°C to +150°C
MSOP-8 Power Dissipation                        300mW
Note:
*All voltages are referenced to GND.

HV833 Features

· 1.8V to 6.5V operating supply voltage
· DC to AC conversion
· Separately adjustable lamp and converter frequency
· Output voltage regulation
· Enable/disable function
· Patented output timing for high efficiency
· <100nA shutdown current
· Split supply capability
· LCD backlighting

HV833 Typical Application

· Portable Transceivers
· Remote Control Units
· Calculators
· PDAs
· Global Positioning Systems (GPS)

HV833 Connection Diagram

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