HV857LMG-G More Semiconductors - ICs by Microchip Technology

Low Noise, High Voltage EL Lamp Driver IC


The HV857L is a low noise, high voltage driver designed for driving Electroluminescent (EL) lamps of up to five square inches. It is the low noise version of the EL lamp driver HV857. The input supply voltage range is from 1.8V to 5.0V. 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 ±95V. The chip can be enabled/disabled by connecting the resistor on RSW-Osc to VDD/ground. The HV857L 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 supply pin, VDD. The EL lamp driver frequency is set by an external resistor connected between the REL-Osc and VDD pins. An external inductor is connected between the LX and VDD pins, or VIN for split supply applications. A 0.003-0.1μF capacitor is connected between CS and ground. The EL lamp is connected between the VA and VB pins. 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 95V, 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 ±95V across the EL lamp.

Where to Buy

Prices starting from US$0.97

Distributor Stock
Logo for Newark
Newark
from US$1.03
No stock
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Avnet America
from US$1.32
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Logo for Microchip Technology
Microchip Technology
from US$0.97
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RS Americas
from US$1.12
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EBV Elektronik
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Avnet Silica
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Features

Audible noise reduction
190 VPP output voltage for higher brightness
Single cell lithium ion compatible
150nA shutdown current
Wide input voltage range 1.8V to 5.0V
Separately adjustable lamp and converter frequencies
Output voltage regulation
Split supply capability

Specifications

Type Single Lamp Driver
Input Voltage Low (V) 1.8
Input Voltage High (V) 5
Nominal Output Voltage (V) ±95
Max Switch Resistance (Ω) 6.0
Output Regulation Yes
Max Lamp Size per Device (in2) 5.0
Package DFN-8, MSOP-8
Product Type Single Lamp Drivers
Operating Iq (µA) 0
Frequency(EL, Typical) 175Hz - 235Hz
Oja (C/W) 37, 171
VOUT 190

Environmental Information

JEDEC Indicator e3
ROHS Compliant
China EFUP Compliant
Device Weight (g) 0.0256
Shipping Weight (kg) 0.2156
Lead Count 8
Package Type MSOP
Package Width or Size 3x3mm
Soldering Composition Matte Tin

Alternative Descriptions

High Voltage Low Noise El Lamp Driver 8 Msop 3X3Mm T/R Rohs Compliant: Yes |Microchip HV857LMG-G | Newark Electronics
EL Lamp DRVR 5V 8-Pin MSOP | Avnet America
HIGH VOLTAGE LOW NOISE EL LAMP DRIVER | Microchip Technology
HIGH VOLTAGE LOW NOISE EL LAMP DRIVER8 MSOP 3x3mm T/R | Microchip Technology Inc. HV857LMG-G | RS Americas


Frequently Asked Questions

Where can I find additional details, specifications and documents for a HV857LMG-G?

Additional datasheets, footprints and schematics for HV857LMG-G are listed on our Part Details page. You can also find images and similar parts to HV857LMG-G on this page.

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What category does HV857LMG-G fall under?

The HV857LMG-G is listed under Semiconductors - ICs > More Semiconductors - ICs.

Can I view similar or alternative parts?

You can view similar parts to HV857LMG-G when available in the More Semiconductors - ICs range under the specifications section at the bottom of the details page.

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Is the HV857LMG-G RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Microchip Technology.

Which authorised distributors for HV857LMG-G have stock available?

Authorised distributors including Newark Electronics, Avnet America, Microchip Technology, RS Americas and EBV Elektronik have stock available or on a lead time for HV857LMG-G.

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