HV857MG-G More Semiconductors - ICs by Microchip Technology

Low Noise, High Voltage EL Lamp Driver IC


The HV857 is a high voltage driver designed for driving Electroluminescent (EL) lamps of up to 5 square inches. The input supply voltage range is from 1.8 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/GND. The HV857 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 RELOsc pin and VDD pin. 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 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 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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Logo for Future Electronics
Future Electronics
from US$1.09
7,500
in stock
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Microchip Technology
from US$0.97
2,500
in stock
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Avnet America
from US$1.32
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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

Patented audible noise reduction
Patented lamp aging compensation
190 VPP output voltage for higher brightness
Patented output timing for high efficiency
Single cell lithium ion compatible
150nA shutdown current
Wide input voltage range 1.8 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) 205Hz - 275Hz
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 | Future Electronics
High Voltage Low Noise El Lamp Driver 8 Msop 3X3Mm T/R Rohs Compliant: Yes |Microchip HV857MG-G | Newark Electronics
EL Lamp DRVR 5V 8-Pin MSOP | Avnet America
HIGH VOLTAGE LOW NOISE EL LAMP DRIVER8 MSOP 3x3mm T/R | Microchip Technology Inc. HV857MG-G | RS Americas


Frequently Asked Questions

Where can I find additional details, specifications and documents for a HV857MG-G?

Additional datasheets, footprints and schematics for HV857MG-G are listed on our Part Details page. You can also find images and similar parts to HV857MG-G on this page.

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What category does HV857MG-G fall under?

The HV857MG-G is listed under Semiconductors - ICs > More Semiconductors - ICs.

Can I view similar or alternative parts?

You can view similar parts to HV857MG-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 HV857MG-G RoHS compliant?

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

Which authorised distributors for HV857MG-G have stock available?

Authorised distributors including Future Electronics, Microchip Technology, Newark Electronics, Avnet America and RS Americas have stock available or on a lead time for HV857MG-G.

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