Datasheet > HV860

HV860

更新时间： 2024-11-05 14:50:03

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
18页	869K
描述
HV860 is a high voltage driver designed for driving Electroluminescent, (EL), lamps of up to 5 squ

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HV860 数据手册

HV860

Low-Noise Dimmable EL Lamp Driver

Features

General Description

• Adjustable Output Regulation for Dimming

• 220 V_PPOutput Voltage for Higher Brightness

• Single-cell Lithium Ion-compatible

• 150 nA Shutdown Current

The HV860 is a high-voltage driver designed for driving

Electroluminescent (EL) lamps of up to 5 in². The input

supply voltage range is from 2.5V to 4.5V. The device

uses a single inductor and a minimum number of

passive components. By using an internal voltage

reference, the regulated output voltage is at a nominal

voltage of 110V. The EL lamp will therefore see ±110V.

An enable pin (EN) is available to turn on and turn off

the device via a logic signal.

• Separately Adjustable Lamp and Converter

Frequencies

• Split Supply Capability

Applications

The HV860 has two internal oscillators, a switching

MOSFET, and a high-voltage EL lamp driver H-bridge.

The frequency for the switching MOSFET is set by an

external resistor connected between the RSW-Osc pin

and the supply pin, VDD. The EL lamp driver frequency

is set by an external resistor connected between

REL-Osc pin and VDD pin. An external inductor is

connected between the L_Xand VDD pins or VIN for

split supply applications. A 3 nF capacitor is connected

between C_Sand ground. The EL lamp is connected

between VA and VB.

• Mobile Cellular Phone Keypads

• Personal Digital Assistant (PDA)

• Handheld Wireless Communication Products

• Global Positioning Systems (GPS)

The switching MOSFET charges the external inductor

and discharges it into the capacitor at C_S. The voltage

at C_Swill start to increase. Once the voltage at C_S

reaches a nominal value of 110V, the switching

MOSFET is turned off to conserve power. The outputs

VA and VB are configured as an H-bridge and are

switching in opposite states to achieve ±110V across

the EL lamp.

EL lamp dimming can be accomplished by changing

the input voltage to the VREG pin. The VREG pin

allows an external voltage source to control the V_CS

amplitude. The V_CSvoltage is approximately 87 times

the voltage seen on V_REG

Package Type

12-lead WQFN

(Top view)

VDD

RSW-Osc EN

11 10

REL-Osc

VREG

VREF

GND

See Table 2-1 for pin information.

 2023 Microchip Technology Inc. and its subsidiaries

DS20005906A-page 1

12 3 4 5 6 7...18

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