Datasheet > HV825

HV825

更新时间： 2024-11-05 14:55:31

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
12页	403K
描述
HV825 is a high voltage driver designed for driving EL lamps typically up to 6.0nF. The input supp

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HV825 数据手册

HV825

High-Voltage EL Lamp Driver IC

Features

General Description

• Processed with HVCMOS^®Technology

• 1.0 to 1.6V Operating Supply Voltage

• DC to AC Conversion

The HV825 is a high-voltage driver designed for driv-

ing EL lamps typically up to 6.0 nF. 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.

• Output Load of Typically up to 6.0 nF

• Adjustable Output Lamp Frequency

• Adjustable Converter Frequency

• Enable Function

The HV825 can be enabled/disabled by connecting

the R_SW-Oscresistor to V_DD/GND.

The HV825 has two internal oscillators to drive a switch-

ing 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 R_SW-

Applications

• Pagers

• Portable Transceivers

• Cellular Phones

• Remote Control Units

• Calculators

_Oscpin and the V_DDsupply pin. The EL lamp driver fre-

quency is set by an external resistor connected between

the R_EL-Oscpin and the V_DDpin. An external inductor is

connected between the L_Xand V_DDpins. A 0.01 to

0.1 µF, 100V capacitor is connected between the C_Spin

and the GND pin. The EL lamp is connected between

the V_Apin and the V_Bpin.

The switching BJT charges the external inductor and

discharges it into the 0.01 to 0.1 µF, 100V capacitor at

the C_Spin. The voltage at the C_Spin will start to

increase. The outputs V_Aand V_Bare 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.

Typical Application Circuit

ꢄꢅꢂꢃ0ȍ

ON = V_DD

OFF = 0V

VDD

REL-Osc

ꢀꢁꢂꢃNȍ

RSW-Osc

560 μH

EL Lamp

1N4148

V_DD= V_IN= 1.5V

0.1 μF²

GND

1.0 nF

16V

0.01 μF

100V

 2015 Microchip Technology Inc.

DS20005450A-page 1

12 3 4 5 6 7...12

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