HV9911

更新时间： 2024-09-30 03:43:11

品牌	Logo	应用领域
超科 - SUPERTEX		驱动器开关
页数	文件大小	规格书
9页	450K
描述
Switch-mode LED Driver IC with High Current Accuracy

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中文翻译

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HV9911 数据手册

HV9911

Initial Release

Switch-mode LED Driver IC with High Current Accuracy

Features

General Description

►

Switch mode controller for single switch drivers

The HV9911 is a current mode control LED driver IC designed to

control single switch PWM converters (buck, boost or buck-boost),

in a constant frequency or constant off-time mode. The controller

uses a peak current control scheme, (with programmable slope

compensation), and includes an internal transconductance ampliﬁer

to control the output current in closed loop, enabling high output

current accuracy (in the case of buck and buck-boost converters,

the high side output current can be sensed by using the HV7800).

In the constant frequency mode, multiple HV9911s can by

synchronized to each other, or to an external clock, using the SYNC

pin. Programmable MOSFET current limit enables current limiting

during input under voltage and output overload conditions. The IC

also includes a 0.25A source and 0.5A sink gate driver for high power

applications. An internal 9 to 250V linear regulator powers the IC,

eliminating the need for a separate power supply for the IC. HV9911

provides a TTL compatible, PWM dimming input that can accept an

external control signal with a duty ratio of 0-100% and a frequency

of up to a few kilohertz.

o Buck

o Boost

o Buck-boost

►

Works with high side current sensing

Closed loop control of output current

High PWM dimming ratio

Internal 9 to 250V linear regulator (can be extended

using external zener diodes)

Internal 2% Voltage Reference (-40°C<T_A<85°C)

Constant frequency or constant off-time operation

Programmable slope compensation

Enable & PWM dimming

+0.25A/-0.5A gate drive (V_DD= 10V)

Output short circuit protection

Output over voltage protection

Synchronization capability

Programmable MOSFET current limit

Soft start

►

The HV9911 based LED driver is ideal for RGB backlight applications

with DC inputs. The HV9911 based LED Lamp drivers can achieve

efﬁciency in excess of 90% for buck and boost applications.

Applications

►

RGB backlight applications

Automotive LED driver application

Battery Powered LED lamps

Other DC/DC LED drivers

Typical Application Circuit

V_IN

L₁

C_IN

C_O

C_DD

R_OVP1

V_IN

R_T

V_DD

R_T

GND

Q₁

R_OVP2

PWMD

GATE

R_SLOPE

R_CS

R_SC

HV9911

SYNC

REF

OVP

C_REF

FAULT

Q₂

R_L2

C_LIM

FDBK

R_L1

I_REF

COMP

R_S

R_R1

C_C

R_R2

NR011206

12 3 4 5 6 7...9

中文翻译

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与HV9911相关器件

型号	品牌	获取价格	描述	数据表
HV9911_06	SUPERTEX	获取价格	Switch-Mode LED Driver IC with High Current Accuracy
HV9911DB1	ETC	获取价格	led驱动电源
HV9911NG-G	SUPERTEX	获取价格	Switch-mode LED Driver IC with High Current Accuracy
HV9911NG-G	MICROCHIP	获取价格	LED DISPLAY DRIVER, PDSO16
HV9911NG-G-M901	MICROCHIP	获取价格	IC LED DRIVER CTRLR DIM 16SOIC
HV9911NG-G-M934	MICROCHIP	获取价格	IC LED DRIVER CTRLR DIM 16SOIC
HV9912	SUPERTEX	获取价格	Switch-mode LED Driver IC With High Current Accuracy and Hiccup Mode Protection
HV9912NG-G	SUPERTEX	获取价格	Switch-mode LED Driver IC With High Current Accuracy and Hiccup Mode Protection
HV9912NG-G	MICROCHIP	获取价格	LED DISPLAY DRIVER, PDSO16
HV9912NG-G-M901	MICROCHIP	获取价格	LED DISPLAY DRIVER

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