Datasheet > LD5805

LD5805

更新时间： 2022-02-26 11:23:22

品牌	Logo	应用领域
通嘉科技 - LEADTREND		/
页数	文件大小	规格书
18页	756K
描述
Step up, 4 strings, Max. 250mA/string, Multi-dimming mode WLED Backlight Controller

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LD5805 数据手册

LD5805

06/15/2015

Step up, 4 strings, Max. 250mA/string, Multi-dimming mode

WLED Backlight Controller

REV. 01

General Description

Features



Input Voltage range: 6V to 36V

The LD5805 is a 4-channel linear current controller which

combines with a boost switching controller. It’s an ideal

solution for driving high power LED backlights. The

LD5805 can achieve high accuracy of constant current to

4 LED strings with 4 internal MOSFET. For each LED

string, the current is adjustable to drive up to 250mA.

The LD5805 features 4 individual current regulator

channels to give accurate driving current for each LED

string. The current balance rate is  2.7%. The 10V gate

driver allows the use of standard level MOSFETs. It can

provide a PDIM or ADIM dimming control.



Drives up to 4 strings in parallel, up to 250mA per

string



LED current balance rate is  2.7%

Programmable switching frequency

PWM Input for PDIM or ADIM dimming control

Use PDIM mode: PWM Input frequency Range

100Hz ~ 1kHz

Use ADIM mode: PWM Input frequency Range 1kHz

~ 30kHz



HV gate Voltage of 10V for driver

Multi-chip parallel operation

LED short and open protection

LED pin short to ground protection

Programmable over-voltage protection

Thermal shutdown

The LD5805 eliminates the audio noise by maintaining

constant LED current regulation during ADIM dimming.

The other features include LED short and open protection,

cycle by cycle current limit, and thermal shutdown.

Applications



Backlight for GPS, Portable DVD



LED Backlight for LCD Monitor/ TV

Leadtrend Technology Corporation www.leadtrend.com.tw

LD5805-DS-01 June 2015

12 3 4 5 6 7...18

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