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HV860

Low Noise Dimmable EL Lamp Driver

Status: In Production

Features:

  • Adjustable output regulation for dimming
  • 220VPP output voltage for higher brightness
  • Single cell lithium ion compatible
  • 150nA shutdown current
  • Separately adjustable lamp and converter frequencies
  • 3x3mm 12-Lead QFN package
  • Split supply capability
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

HV860 is a high voltage driver designed for driving Electroluminescent, (EL), lamps of up to 5 square inches. The input supply voltage range is from 2.5 to 4.5V. 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 voltage of 110V. The EL lamp will therefore see ±110V. An enable pin, (EN), is available to turn the device on and off via a logic signal. The HV860 has two internal oscillators, a switching MOSFET, and a high voltage EL lamp driver H-bridge. 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 REL-Osc pin and VDD pin. An external inductor is connected between the LX and VDD pins or VIN for split supply applications. A 3.0nF 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 CS. The voltage at CS will start to increase. Once the voltage at CS reaches a nominal value of 110V, 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 ±110V across the EL lamp. EL lamp dimming can be accomplished by changing the input voltage to the VREG pin. The VREG pin allows an external voltage source to control the VCS amplitude. The VCS voltage is approximately 87 times the voltage seen on VREG.

Additional Features
  • Adjustable output regulation for dimming
  • 220VPP output voltage for higher brightness
  • Single cell lithium ion compatible
  • 150nA shutdown current
  • Separately adjustable lamp and converter frequencies
  • 3x3mm 12-Lead QFN package
  • Split supply capability
Parametrics
Name
Value
Type
Single Lamp Driver
Input Voltage Low (V)
2.5
Input Voltage High (V)
4.5
Nominal Output Voltage (V)
±110
Max Switch Resistance(Ω)
6.0
Output Regulation
Yes
Max Lamp Size per Device (in2)
5.0
Package
QFN-12
Product Type
Single Lamp Drivers
Frequency (EL, Typical)
160Hz - 240Hz
Θja (C/W)
60
VOUT
220

Documents

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User Guides

06/24/2015
377KB

Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
HV860DB1 Demo Board
HV860DB1 Demo Board ( HV860DB1 )

The HV860DB1 demoboard contains all necessary circuitry to demonstrate the features of the HV860 EL lamp driver. For EL lamp dimming, either a potentiometer or an N-channel open drain PWM signal can be used, but not both.

 

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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
HV860K7-G
0.020780
0.116667
12
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.

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