HV9980

更新时间： 2024-11-21 03:43:11

品牌	Logo	应用领域
超科 - SUPERTEX		驱动器
页数	文件大小	规格书
10页	1235K
描述
3-Channel LED Array Driver IC

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中文翻译

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数据手册

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HV9980 数据手册

HV9980

3-Channel LED Array Driver IC

illumination. The output currents are programmed by

controlling peak source current in each of the three internal

200V, 25Ω switching MOSFETs.

Features

► Integrated 200V, 25Ω (typ.) MOSFETs

► Programmable output current to 80mA per channel

► TTL compatible PWM dimming inputs

► 3-Phase synchronous operation

► Leading edge blanking

Thepeak currentisdetected bymonitoring voltage atexternal

sense resistors connected to RSENSE1-3. The switching

MOSFET is turned off when the corresponding current sense

signal exceeds the reference voltage applied at REF1-3 (in

the case of normal output signal polarity). Beginning of the

next switching cycle is determined by the external clock

signal received at the CLK input. All three channels operate

at a switching frequency of 1/6 of the external clock frequency

and positioned 120º out-of-phase for the purpose of input and

output ripple current reduction. Each channel is protected

from an output short circuit condition. When an over-current

condition is detected in the output switch (RSENSE1-3),

the corresponding channel shuts down for 200us. HV9980

recovers automatically, when the short circuit condition is

removed. Each current sense input (CS1-CS3) is equipped

with a leading edge blanking delay to prevent false triggering

of the current sense comparators due to circuit parasitics.

► Short circuit protection with skip mode

► Over-temperature protection

Applications

► LCD panel backlighting

► DLP RPTV or projector LED engine driver

► RGB decorative lighting

► General LED lighting

General Description

The HV9980 is a fully integrated 3-channel peak-current

PWM controller for driving buck converters in constant output

current mode. It is optimized for use with a large array of

20~80mA LED strings, where multiple HV9980 ICs are used

sharing a common clock and a common reference voltage.

Over-temperature protection is included to prevent

destructive failures due to over-heating. Programmable

slope compensation is available at each CS input.AGND and

PGND1-3 must be tied together on the printed circuit board.

VDD1-3 must be also connected together on the PCB.

Both the clock and the voltage reference are external to the

HV9980 for improved output current accuracy and uniform

Typical Application Circuit

+V_IN

C_IN

R_REF1

REF1

REF2

REF3

PWMD1

PWMD2

PWMD3

C_REF1

HV9980WG

R_REF2

CLOCK

POL

C_REF2

R_REF3

AGND

C_REF3

C_DD1

C_DD2

R_SENSE1

R_SENSE2

R_SENSE3

C_DD3

+8V

12 3 4 5 6 7...10

中文翻译

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与HV9980相关器件

型号	品牌	获取价格	描述	数据表
HV9980WG-G	SUPERTEX	获取价格	3-Channel LED Array Driver IC
HV9982	SUPERTEX	获取价格	Three-Channel, Closed-Loop, Switch Mode LED Driver IC
HV9982	MICROCHIP	获取价格	The HV9982 is a three-channel, closed loop, peak current mode PWM controller for driving a
HV9982K6-G	SUPERTEX	获取价格	Three-Channel, Closed-Loop, Switch Mode LED Driver IC
HV9982K6-GM935	SUPERTEX	获取价格	LED Driver
HV9985	SUPERTEX	获取价格	Three-Channel, Closed-Loop, Switch Mode LED Driver IC
HV9985	MICROCHIP	获取价格	The HV9985 is a three-channel peak current mode PWM controller for driving single switch c
HV9985K6-G	SUPERTEX	获取价格	Three-Channel, Closed-Loop, Switch Mode LED Driver IC
HV9985K6-GM935	SUPERTEX	获取价格	LED Driver
HV9985QP-G	SUPERTEX	获取价格	LED Driver, 1-Segment, PDSO44, 17.83 X 7.50 MM, 2.64 MM HEIGHT, 0.80 MM PITCH, ROHS COMPLI

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