Microchip HV853 Manual

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

HV853

Features

No external components required when using an

external EL clock frequency

Audible noise reduction with improved EMI

EL frequency can be set by an external resistor

DC to AC converter

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

Output voltage regulation

Enable function

EL Lamp dimming

Available in 10-Lead DFN and 8-Lead MSOP

packages

Applications

Cellular phone keypad

Watches

Small handheld wireless devices

MP3 Players

►

General Description

The Supertex HV853 is a high voltage, low noise EL

(electroluminescent) lamp driver. It is the low noise version of

the HV852 with improved EMI performance, operating over an

input voltage range of 3.2V to 5.0V. It is designed to drive EL

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

HV853 converts a low voltage DC input to a high voltage AC

output across an EL lamp. A nominal regulated output voltage

of ±80V is applied to the 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.

The EL lamp frequency can be set either by an external

resistor REL or by applying an external clock where the clock

frequency is divided by 128 to set the EL lamp frequency.

Typical Application Circuits

High Voltage, Low Noise,

Inductorless EL Lamp Driver

EL Lamp Frequency set by REL

VDD = ON

GND = OFF

VDD CDD

VDD

GND

LAMP

VDD

-GND

CLKEN

CLKIN

REL

VDD

GND

CLKEN

CLKIN

REL

VDD EL

LAMP

VDD CDD

REL

VDD = ON

GND = OFF

HV853MG HV853MG

EL Lamp Frequency set by External Clock

HV853

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

Ordering Information

DEVICE

Package Options

10-Lead DFN

3.00x3.00mm body

0.80mm height (max)

0.50mm pitch

8-Lead MSOP

3.00x3.00mm body

1.10mm height (max)

0.65mm pitch

HV853 HV853K7-G HV853MG-G

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

Absolute Maximum Ratings

Parameter Value

VDD, supply voltage -0.5V to 6.5V

Storage temperature -65°C to +150°C

Power dissipation (10-Lead DFN) 1.6W

Power dissipation (8-Lead MSOP) 300mW

Sym Parameter Min Typ Max Units Conditions

IDDQ Quiescent current - - 150 nA EN = 0V

VA or VBPeak output voltage 68 80 92 V No load

VA-VBPeak to peak output voltage 136 160 184 V

IDD Operating current - 15 30 mA See Figure 1

VDD = 3.5V

REL = 1.5MΩ

Load = 3.3nF + 1.0kΩ

VA or VBPeak output voltage 68 80 92 V

VA-VBPeak to peak output voltage 136 160 184 V

fEL EL lamp frequency 240 280 320 Hz

Electrical Characteristics

(Over recommended operating conditions unless otherwise speciﬁed, T

A = 25ºC)

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

Product Marking

8-Lead MSOP(MG)

10-Lead DFN (K7)

H853

YWLL

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

H853

LL LL

YYWW

Top Marking

Bottom Marking

8-Lead MSOP (MG)

(top view)

GND

CLKEN

VDD

REL

CLKIN

10-Lead DFN (K7)

(top View)

GND

CLKEN

VDD

REL

CLKIN

GND

Recommended Operating Conditions

Sym Parameter Min Typ Max Units Conditions

VDD Input voltage 3.2 - 5.0 V ---

fEL EL lamp frequency 50 - 500 Hz ---

Cload EL lamp capacitance 0 - 5.3 nF ---

TAOperating temperature -25 - +85 OC ---

Note:

Pads are at the bottom of the package.

Center heat slug should be connected to

GND or left ﬂoating.

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	HV853

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