Datasheet > LDS8711

LDS8711

更新时间： 2024-02-28 01:24:41

品牌	Logo	应用领域
IXYS		驱动器
页数	文件大小	规格书
12页	516K
描述
High Efficiency 10 LED Driver with No External Schottky

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中文翻译

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LDS8711 数据手册

LDS8711

High Efficiency 10 LED Driver with No External Schottky

either in PWM or in Smart OneWire™ Interface

mode. The Smart OneWire™ Interface mode allows

set LED current in the range from 0.125 to 32 mA in

256 steps of 0.125 mA each. In PWM mode,

LDS8711 operates with either factory, or customer

preset maximum LED current values. Series

connection of the LEDs provides constant current

and subsequently uniform brightness, eliminating the

need for ballast resistors and factory calibration.

Operation at 0.7 MHz allows use of small value

inductor (10 – 33 µH) and external ceramic capacitor

(1 – 2.2 µF).

FEATURES



High efficiency boost converter with the input

voltage range from 2.7 to 5.5 V

250 mV current sense voltage

Drives one LED string with 10 LEDs in series

up to 32 mA



No external Schottky Required (Internal

synchronous rectifier*)



0.7 MHz Switching Frequency

Efficiency greater than 83%

Smart OneWire™ Interface and PWM LED

Brightness Control Modes Provide Constant

I_LEDcurrent or constant color temperature

brightness control

The use of integrated rectifier makes the efficiency

dependent on only two external components

parameters: inductor DCR and external capacitor

ESR.



Small External Inductor (10 µH – 33 µH)

Over voltage, under voltage, over

temperature, over current protection

The supply voltage down to 2.7 V for new Li-ion

battery chemistries or two alkaline battery cells

extends the battery life. Under-voltage protection

disables the part when V_INvoltage reaches 2.0 V



Low Shutdown Current (<1µA)

Available in 2 x 3 x 0.8 mm 8-pin TDFN

package

The LDS8711 has thermal shutdown set at 150 C.

Above this value, the boost converter stops

switching. The part resumes normal operations when

temperature drops below 130 ⁰C.

APPLICATION



Color Display Backlight

Portable Navigation and GPS Receivers

Smart phones

Digital Photo Frames

Portable DVD Players

Multimedia Phones

The over-current protection provides cycle-by-cycle

current limit.

The internal output over-voltage protection prevents

damage in the case of a faulty LED disconnect.

The PWM control ensures brightness adjustment with

a frequency from 100 Hz up to 30 KHz.

DESCRIPTION

The EN/PWM logic input functions as a chip enable

and LED current PWM contol pin.

The LDS8711 is a fixed frequency current mode

boost converter with internal rectifier and cycle-by-

cycle switch current limit specifically designed to

drive a string of up to 10 White LEDs. It operates

The device is available in in 8-pin TDFN 2 x 3 mm

package with a max height of 0.8 mm.

TYPICAL APPLICATION CIRCUIT

*) Patent pending

Characteristics subject to change without notice

Doc. No. 8711DS, Rev. N1.0

12 3 4 5 6 7...12

中文翻译

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与LDS8711相关器件

型号	品牌	获取价格	描述	数据表
LDS8711008-T2-300	IXYS	获取价格	High Efficiency 10 LED Driver with No External Schottky
LDS8720008-T2-200	IXYS	获取价格	LED Driver, 184-Segment, PDSO8, 2 X 3 MM, 0.80 MM HEIGHT, 0.50 MM PITCH, HALOGEN FREE AND
LDS8724	IXYS	获取价格	40 WLED Driver with Boost Converter
LDS8724008-T2-200	IXYS	获取价格	LED Driver, 45-Segment, PDSO8, 2 X 3 MM, 0.80 MM HEIGHT, 0.50 MM PITCH, HALOGEN FREE AND R
LDS8724008T2-200	IXYS	获取价格	40 WLED Driver with Boost Converter
LDS8726008-T2-200	IXYS	获取价格	LED Driver, 49-Segment, PDSO8, 2 X 3 MM, 0.80 MM HEIGHT, 0.50 MM PITCH, HALOGEN FREE AND R
LDS8845002-T2	IXYS	获取价格	LED Driver, 4-Segment, 3 X 3 MM, 0.50 MM PITCH, HALOGEN FREE AND ROHS COMPLIANT, MO-220, T
LDS8845003-T2	IXYS	获取价格	LED Driver, 4-Segment, 4 X 4 MM, 0.65 MM PITCH, HALOGEN FREE AND ROHS COMPLIANT, MO-220, T
LDS8846002-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
LDS8846003-T2	IXYS	获取价格	LED Driver, 4-Segment, 4 X 4 MM, 0.80 MM HEIGHT, 0.65 MM PITCH, HALOGEN FREE AND ROHS COMP

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