Microchip HV852 Manual

Microchip Ikke kategoriseret HV852

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1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com● ● ●

HV852

Features

No external components required when using an

external EL clock frequency

EL frequency can be set by an external resistor

Low Noise

DC to AC converter

Drives up to 5.3nF (approx. 1.5in2 lamp) load

Output voltage regulation

Enable function

EL Lamp dimming

Applications

Cellular phone keypad

Watches

Small handheld wireless devices

MP3 Players

►

General Description

The Supertex HV852 is a high voltage, low noise, inductorless

EL (electroluminescent) lamp driver. It is designed to drive EL

lamps of up to 1.5in2, with capacitive values up to 5.3nF over

an input voltage range of 2.4 to 5.0V. The HV852 converts a

low voltage DC input to a high voltage AC output across an

EL lamp. It uses a charge pump scheme to boost the input

voltage eliminating the need for an external inductor, diode,

and high voltage capacitor commonly found in conventional

topologies.

The charge pump circuit discharges its energy into an EL lamp

through a high voltage H-bridge. Once the voltage reaches

its regulated limit, it is turned off to conserve power. The EL

lamp is then discharged to ground and the H-bridge changes

state to allow the charge pump to charge the EL lamp in the

opposite direction.

Typical Application Circuit

High Voltage,

Low Noise,

Inductorless EL Lamp Driver

EL Lamp frequency set by REL

EL LAMP

VDD CDD

REL

VDD = ON

GND = OFF

HV852MG

GND

REL

VDD

CLKENCLKIN

HV852

1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com● ● ●

Ordering Information

Device

Package Options

8-Lead MSOP

3.00x3.00mm body

1.10mm height (max)

0.65mm pitch

10-Lead DFN

3.00x3.00mm body

0.80mm height (max)

0.50mm pitch

HV852 HV852MG-G HV852K7-G

-G indicates package is RoHS compliant (‘Green’)

Absolute Maximum Ratings

Parameter Value

VDD, supply voltage -0.5V to 6.5V

Operating temperature -25°C to +85°C

Storage temperature -65°C to +150°C

Power dissipation: 8-Lead MSOP 300mW

Power dissipation: 10-Lead DFN 1.6W

Absolute Maximum Ratings are those values beyond which damage to the

device may occur. Functional operation under these conditions is not implied.

Continuous operation of the device at the absolute rating level may affect

device reliability. All voltages are referenced to device ground.

Pin Conﬁgurations

8-Lead MSOP

(top view)

GND

CLKEN

VDD

REL

CLKIN

VDD

REL

GND

5 6

GND

VDD CLKEN

CLKIN

10-Lead DFN

(top view)

Note:

Pads are at the bottom of the pack-

age. Center heat slug is at ground

potential.

Product Marking

H852

Y W L L

Y = Last Digit of Year Sealed

W = Code for Week Sealed

L = Lot Number

= “Green” Packaging

L = Lot Number

YY = Year Sealed

WW = Week Sealed

= “Green” Packaging

H852

LLLL

YYWW

Top Marking

Bottom Marking

10-Lead DFN (K7)

8-Lead MSOP (MG)

Recommended Operating Conditions

Sym Parameter Min Typ Max Units Conditions

VDD Input voltage 2.4 - 5.0 V ---

fEL EL lamp frequency 50 - 500 Hz ---

Cload EL lamp capacitance 0 - 5.3 nF ---

TAOperating temperature -25 - +85 °C ---

Package may or may not include the following marks: Si or

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	HV852

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