Datasheet > LDS8141

LDS8141

更新时间： 2024-01-21 18:06:56

品牌	Logo	应用领域
IXYS		/
页数	文件大小	规格书
22页	402K
描述
6-Channel / 4-Channel High-Side Linear WLED Driver

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中文翻译

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数据手册

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LDS8141 数据手册

LDS8161/41

6-Channel / 4-Channel High-Side Linear WLED Driver

with LED Temperature Compensation Using LED-Sense^TM, I²C, and Digital PWM

FEATURES



Six (8161) / or Four (8141) Power-Lite^TMLinear LDO

current regulators with 50 mV dropout in a high-

side driver topology.

High temperature LED current de-rating using the

LED-Sense^TMtemperature compensation

algorithm, which directly monitors an LED PN

junction. No external temperature sensor is

required.



I²C compatible serial programming interface

LED current programmable via I²C from 0 to

~32 mA in 256 linear steps. Three (8161) or two

(8141) separately controlled driver banks with 2

LED drivers each



Integrated PWM generator for LED dimming with

12-bit resolution and 256 I²C-programmable

logarithmic duty cycle steps from 0% to 100%

(~0.17 dB per step)

The LDO drivers have a low dropout voltage of

50 mV typically at maximum rated current. This

provides a low power/low EMI solution in Li-ion

battery applications without voltage boosting and

associated external capacitors and components.



Total combined dimming range of > 16,384:1

Power efficiency up to 98%; average efficiency

> 80% in Li-ion battery applications

Low current shutdown mode ( < 1 µA );

Soft start and current limiting

LED Short circuit detection and protection, LED

open detection

Thermal shutdown protection



High temperature current de-rating insures LED

reliability and provides automatic adjustment of LED

current to achieve maximum specified LED

brightness across the ambient temperature range.



LED-Sense^TM

temperature

Low EMI.

The

proprietary

Available in 3 mm x 3 mm x 0.8 mm 16-pin TQFN

package

compensation algorithm directly monitors the junction

temperature of an LED and applies current de-rating

per a user loadable LUT (look up table) in 5ºC steps.

No external temperature sensing device is needed.

APPLICATIONS



Keypad and Display Backlight

Cellular Phone

An integrated 12-bit PWM generator with “smooth”

logarithmic control supports LED dimming and high

temperature current de-rating. The PWM duty cycle is

programmable via the I²C serial interface from 0% to

100%. User programmed 8-bit codes are converted

to 12-bit resolution logarithmic steps of ~ 0.17 dB per

step. The PWM frequency is ~280 Hz to minimize

noise generation.

PDAs and Smartphones

DESCRIPTION

The LDS8161 is a 6-channel and the LDS8141 is a 4-

channel linear LED driver for WLED applications. It

includes ultra low dropout LDO current regulators at a

maximum 31.875 mA per channel in a common

cathode high side driver topology.

The EN logic input functions as a chip enable. A logic

HIGH applied at the EN pin allows the

LDS8161/LDS8141

respond

I²C

The LDS8161/LDS8141 has an average efficiency of

> 80% in Li-ion battery applications. It includes three

(LDS8161) or two (LDS8141) 8-bit current setting

DACs (one per bank) allowing LED currents to be

programmed via an I²C-compatible serial interface

from 0 to 31.875 mA in 256 steps of 125A per step.

communications. An external serial interface address

pin is available for use in multi-target applications.

The device operates from 2.5V to 5.5V.

The LDS8160 is available in a 3 x 3 x 0.8 mm³

16-lead TQFN package.

12 3 4 5 6 7...22

中文翻译

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与LDS8141相关器件

型号	品牌	获取价格	描述	数据表
LDS8141002-T2	IXYS	获取价格	LED Driver, 4-Segment, 3 X 3 MM, 0.80 MM HEIGHT, 0.50 MM PITCH, HALOGEN FREE AND ROHS COMP
LDS815-100	ETC	获取价格	Analog IC
LDS815-200	ETC	获取价格	Analog IC
LDS815-250	ETC	获取价格	Analog IC
LDS8161	IXYS	获取价格	6-Channel / 4-Channel High-Side Linear WLED Driver
LDS8161002-T2	IXYS	获取价格	LED Driver, 6-Segment, 3 X 3 MM, 0.80 MM HEIGHT, 0.50 MM PITCH, HALOGEN FREE AND ROHS COMP
LDS85-750	ETC	获取价格	Analog IC
LDS8620002-T2	IXYS	获取价格	LED Driver, 2-Segment, 3 X 3 MM, 0.80 MM HEIGHT, 0.50 MM PITCH, HALOGEN FREE AND ROHS COMP
LDS8621002-T2	IXYS	获取价格	LED Driver, 2-Segment, 3 X 3 MM, 0.80 MM HEIGHT, 0.50 MM PITCH, HALOGEN FREE AND ROHS COMP
LDS8640008-T2	IXYS	获取价格	LED Driver, 2-Segment, PDSO8, 2 X 3 MM, 0.80 MM HEIGHT, 0.50 MM PITCH, HALOGEN FREE AND RO

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