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

HV861

Dimmable Low Noise Dual EL Lamp Driver

Status: In Production

Features:

  • Adjustable output regulation for dimming
  • Lamp fade-in/fade-out capability
  • Low audible noise
  • 180VPP output voltage for higher brightness
  • 1.5V enable input logic high
  • Single cell lithium ion compatible
  • One miniature inductor to power both lamps
  • Separately adjustable lamp and converter frequencies
  • Split supply capability
  • 16-Lead QFN package
View More
Overview
Documents
Development Environment
Similar Devices
RoHS Information
Add To Cart

Device Overview

Summary

HV861 is a low noise, dimmable, high voltage, dual EL Lamp driver designed for driving two electroluminescent (EL) Lamps with a combined area of 5.0 square inches. The input supply voltage range is from 2.5V to 4.5V. Enable input logic high can go as low as 1.5V, which allows logic interface operating from typical 1.8V supplies.The device is designed to minimize audible noise emitted by the EL Lamps. The device uses a single inductor and a minimum number of passive components. Using the internal reference voltage, the regulated output voltage is at a nominal value of 90V. The EL Lamps will therefore see ±90V. The two EL Lamps can be turned ON and OFF using two CMOS logic inputs, EN1 and EN2. The driver is disabled when both EN1 and EN2 are at logic low. The HV861 has two internal oscillators, a switching MOSFET, and two high voltage EL Lamp driver H-bridges. Each driver has its own half bridge common output, COM1 and COM2, which significantly minimizes the DC offset seen by the EL Lamp. The frequency for the switching MOSFET is set by an external resistor connected between the RSW-Osc pin and the supply pin VDD. 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 and VDD pins or VIN for split supply applications. Depending upon the EL Lamp sizes, a 1.0nF to 10.0nF capacitor is connected between the CS and ground. As 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. EL Lamp dimming can be accomplished by applying a PWM logic signal to the PWM pin. The EL Lamp brightness will be inversely proportional to the PWM duty cycle. The HV861 can also slowly turn the EL Lamp ON/OFF giving a fade ON/OFF appearance.

Additional Features
  • Adjustable output regulation for dimming
  • Lamp fade-in/fade-out capability
  • Low audible noise
  • 180VPP output voltage for higher brightness
  • 1.5V enable input logic high
  • Single cell lithium ion compatible
  • One miniature inductor to power both lamps
  • Separately adjustable lamp and converter frequencies
  • Split supply capability
  • 16-Lead QFN package
Parametrics
Name
Value
Type
Dual Lamp Drivers
Input Voltage Low (V)
2.5
Input Voltage High (V)
4.5
Nominal Output Voltage (V)
±90
Max Switch Resistance(Ω)
7.0
Output Regulation
Yes
Max Lamp Size per Device (in2)
5.0
Package
QFN-16
Frequency (EL, Typical)
100Hz - 500Hz
Θja (C/W)
60
VOUT
180

Documents

Jump to:

User Guides

Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
HV861DB1 Demo Board
HV861DB1 Demo Board ( HV861DB1 )

The HV861DB1 demoboard contains all the necessary circuitry to demonstrate the features of the HV861 dual EL Lamp driver.

Learn More
Add To Cart

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
HV861K7-G
0.025430
0.123333
16
WQFN
3x3x0.8mm
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