Datasheet > HV825_07

HV825_07

更新时间： 2024-11-04 03:43:11

品牌	Logo	应用领域
超科 - SUPERTEX		驱动器高压
页数	文件大小	规格书
5页	498K
描述
High Voltage EL Lamp Driver IC

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HV825_07 数据手册

HV825

High Voltage EL Lamp Driver IC

Features

► Processed with HVCMOS^®technology

► 1.0V to 1.6V operating supply voltage

► DC to AC conversion

► Output load of typically up to 6nF

► Adjustable output lamp frequency

► Adjustable converter frequency

► Enable function

General Description

TheSupertexHV825isahighvoltagedriverdesignedfordriving

EL lamps typically up to 6nF. The input supply voltage range

is from 1.0V to 1.6V. The device uses a single inductor and a

minimum number of passive components. The typical output

voltage that can be applied to the EL lamp is 56V.

The HV825 can be enabled/disabled by connecting the R_SW-Osc

resistor to V_DD/GND.

The HV825 has two internal oscillators, a switching bipolar

junction transistor (BJT), and a high voltage EL lamp driver.

The frequency for the switching BJT is set by an external

resistor connected between the RSW-Osc pin and the VDD

supply pin. The EL lamp driver frequency is set by an external

resistor connected between REL-Osc pin and the VDD pin. An

external inductor is connected between the LX and VDD pins.

A 0.01 to 0.1µF, 100V capacitor is connected between the CS

pin and the GND pin. The EL lamp is connected between the

VA pin and the VBpin.

Applications

► Pagers

► Portable Transceiver

► Cellular phones

► Remote control units

► Calculators

TheswitchingBJTchargestheexternalinductoranddischarges

it into the 0.01 to 0.1µF, 100V capacitor at the CS pin. The volt-

age at the CS pin will start to increase. The outputs VA and VB

are conﬁgured as an H-bridge and are switching in opposite

states to achieve a peak-to-peak voltage of two times the V_CS

voltage across the EL lamp.

HV825 Block Diagram

VDD

RSW-Osc

Switch

Osc

GND

Output

Osc

REL-Osc

12 3 4 5

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