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HV833

High Voltage, EL Lamp Driver

Status: In Production

Features:

  • 1.8 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
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

HV833 is a high voltage driver designed for driving EL lamps of up to 35nF (10-12in2). The input supply voltage range is from 1.8 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 a resistor between the RSW-Osc pin and the VDD/GND pins. 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 RSW-Osc pin and the VDD supply pin. The EL lamp driver frequency is set by an external resistor connected between the REL-Osc pin and the VDD pin. An external inductor is connected between the LX pin and VDD or VIN pin. A 0.003-0.1µF capacitor is connected between the CS pin and the GND pin. The EL lamp is connected between the VA pin and the VB pin. The switching MOSFET charges the external inductor and discharges it into the capacitor at CS. The voltage at CS will start to increase. Once the voltage at CS reaches a nominal value of 90V, the switching MOSFET is turned OFF to conserve power. The outputs VA and VB are configured as an H bridge and are switching in opposite states to achieve 180V peak-to-peak across the EL lamp.

Additional Features
  • 1.8 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
Parametrics
Name
Value
Type
Single Lamp Driver
Input Voltage Low (V)
1.8
Input Voltage High (V)
6.5
Nominal Output Voltage (V)
±90
Max Switch Resistance(Ω)
4.0
Output Regulation
Yes
Max Lamp Size per Device (in2)
12
Package
MSOP-8
Frequency (EL, Typical)
240Hz - 300Hz
Θja (C/W)
216
VOUT
180

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06/23/2015
1059KB

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
HV833MG-G
0.025600
0.215600
8
MSOP
3x3mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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