Datasheet > HV850

HV850

更新时间： 2023-12-06 20:09:23

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
7页	592K
描述
HV850 is a high voltage electroluminescent (EL) Lamp Driver IC. It is designed to drive EL lamps o

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HV850 数据手册

HV850

Figure 2: Push Button Turn on with Delay Turn off (For V_DD= 3.4V to 4.2V only)

VDD

REL

Lamp

R_EL

HV850

Push

button

turn on

V_DD

C_DD

GND

CLKN

CLKEN

RC time constant will set

Turn OFF Delay time

Figure 3: Independent Programmable Output Frequency (f_EL) (For V_DD= 3.4V to 4.2V only)

VDD

REL

Lamp

V_DD

HV850

C_DD

V_DD= ON

GND = OFF

GND

CLKIN CLKEN

V_DD

GND

EL Lamp Dimming Using PWM

EL lamp dimming can be achieved by applying a PWM signal to the ENABLE pin. The PWM signal duty cycle is proportional

to the lamp brightness. This is done by pulse skipping the output pulses. The PWM frequency should be kept below the EL

frequency but above 50Hz to avoid ﬂickering.

Figure 4: PWM Dimming Circuit (For V_DD= 3.4V to 4.2V only)

VDD

REL

R_EL

EL Lamp

V_DD

HV850

C_DD

GND

V_DD

GND

PWM

Signal

CLKIN

CLKEN

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

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