Microchip logo
  • All
  • Products
  • Documents
  • Applications Notes
product primary image

HV823

High Voltage, EL Lamp Driver IC

Status: In Production

Features:

  • Processed with HVCMOS® technology
  • 2.0 to 9.5V operating supply voltage
  • DC to AC conversion
  • 180V peak-to-peak typical output voltage
  • Large output load capability typically 50nF
  • Permits the use of high-resistance elastomeric lamp components
  • Adjustable output lamp frequency to control lamp color, lamp life, and power consumption
  • Adjustable converter frequency to eliminate harmonics and optimize power consumption
  • Enable/disable function
  • Low current draw under no load condition
View More
Overview
Documents
Development Environment
Similar Devices
RoHS Information
Add To Cart

Device Overview

Summary

HV823 is a high-voltage driver designed for driving EL lamps of up to 50nF. EL lamps greater than 50nF can be driven for applications not requiring high brightness. The input supply voltage range is from 2.0V to 9.5V. 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 by connecting the resistors on the RSW-Osc pin and the REL-Osc pin to the VDD pin, and disabled when connected to GND. The HV823 has two internal oscillators, a switching MOSFET and a high-voltage EL lamp driver. The frequency of the switching converter 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 the VDD pin. A 0.01µF to 0.1µF capacitor is connected between the CS pin and the GND. The EL lamp is connected between the VA and VB pins. The switching MOSFET charges the external inductor and discharges it into the CS capacitor. 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 output pins VA and VB are configured as an H-bridge and are switched in opposite states to achieve 180V peak-to-peak across the EL lamp.

Additional Features
  • Processed with HVCMOS® technology
  • 2.0 to 9.5V operating supply voltage
  • DC to AC conversion
  • 180V peak-to-peak typical output voltage
  • Large output load capability typically 50nF
  • Permits the use of high-resistance elastomeric lamp components
  • Adjustable output lamp frequency to control lamp color, lamp life, and power consumption
  • Adjustable converter frequency to eliminate harmonics and optimize power consumption
  • Enable/disable function
  • Low current draw under no load condition
Parametrics
Name
Value
Type
Single Lamp Driver
Input Voltage Low (V)
2.0
Input Voltage High (V)
9.5
Nominal Output Voltage (V)
±90
Max Switch Resistance(Ω)
6.0
Output Regulation
Yes
Max Lamp Size per Device (in2)
23
Package
SOIC-8
Frequency (EL, Typical)
330Hz - 440Hz
Θja (C/W)
101
VOUT
180

Documents

Jump to:

User Guides


Development tools data is currently unavailable.

Similar Devices

Product
Price 5K
$1.55
$1.55
$1.38
$1.87
$1.18
$0.84
$1.27
$1.00
$0.92
$0.92
$0.92
$0.71
$0.71
$0.73
$0.81
$0.97
$0.85
$0.94
$0.89
$0.89
$1.28

RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
HV823LG-G
0.078000
0.230303
8
SOIC
.150In(3.90mm)
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.

Buy from the Microchip Store

Grid
View
Table
View
Filter:
Apply
Clear
Only show products with samples
Product
Leads
Package Type
Temp Range
Packing Media
5K Pricing
Buy