3

Supertex inc.

www.supertex.com

Doc.# DSFP-HV857L

A062013

HV857L

* The inductor used is a 220µH Murata inductor, max DC resistance of 8.4Ω, part # LQH32CN221K21.

Sym

Parameter

Min

Typ

Max Units Conditions

R

DS(ON)

On-resistance of switching transistor

-

-

6.0

Ω

I = 100mA

V

CS

Max. output regulation voltage

85

95

105

V

V

V

Peak to peak output voltage

170

190

210

V

V

I

DDQ

Quiescent V

-

-

150

nA

R

I

DD

Input current going into the VDD pin

-

-

150

µA

V

I

IN

Input current including inductor current

-

25

40

mA

See Fig. 1*

V

CS

Output voltage on VCS

-

92

-

V

See Fig. 1

f

EL

EL lamp frequency

175

205

235

Hz

See Fig. 1

f

SW

Switching transistor frequency

65

77

89

kHz

See Fig. 1

D

Switching transistor duty cycle

-

88

-

%

See Fig. 1

Sym

Parameter

Min

Typ

Max

Units Conditions

EN-L

Logic input low voltage

0

-

0.2

V

V

EN-H

Logic input high voltage

V

-

V

DD

V

V

Enable/Disable Function Table

Electrical Characteristics

Block Diagram

C

+

_

Disable

High

Voltage

Level

Translator

GND

VDD

Q

Q

Q

VA

CS

LX

VB

Q

RSW-Osc

REL-Osc

EL

Osc

V

DD

Switch

Osc