LT3463A

更新时间： 2024-11-26 04:19:35

品牌	Logo	应用领域
凌特 - Linear		驱动器肖特基二极管
页数	文件大小	规格书
24页	450K
描述
20mA LED Driver and OLED Driver with Integrated Schottky in 3mm x 2mm DFN

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中文翻译

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LT3463A 数据手册

LT3498

20mA LED Driver and

OLED Driver with Integrated

Schottky in 3mm x 2mm DFN

DESCRIPTION

FEATURES

The LT^®3498 is a dual output boost converter featuring a

2.3MHzPWMLEDDriverandPFMOLEDDriver.Itincludes

an internal power switch and Schottky diode for each

driver. Both converters can be independently shut down

and modulated. This highly integrated power solution is

ideal for dual display electronic devices.

■

Dual Output Boost for Dual Display Devices

■

Drives Up to Six White LEDs and OLED/LCD Bias

■

Internal Power Switches and Schottky Diodes

■

Independent Dimming and Shutdown

■

200mV High Side Sense on LED Driver Allows

“One-Wire Current Source”

■

Wide Input Voltage Range: 2.5V to 12V

The2.3MHzstep-upconverterisdesignedtodriveuptosix

white LEDs in series from a Li-Ion cell. The device features

a unique high side LED current sense that enables the part

tofunctionasa“one-wire”currentsource—onesideofthe

LEDstringcanbereturnedtogroundanywhere.Traditional

LED drivers use a grounded resistor to sense LED current,

requiring a 2-wire connection to the LED string.

■

Wide Output Voltage Range: Up to 32V

■

2.3MHz PWM Frequency for LED Driver

■

PFM for OLED Driver is Non-Audible Over Entire

Load Range

■

Open LED Protection (27V Maximum on CAP1 Pin)

■

OLED Output Disconnect

■

Available in 12-Pin DFN Package

■

The PFM OLED driver is a low noise boost converter that

featuresanovelcontroltechnique.*Theconvertercontrols

power delivery by varying both the peak inductor current

and switch off time. This technique results in low output

voltage ripple, as well as, high efﬁciency over a wide load

range. The off time of the switch is not allowed to exceed a

ﬁxed level, guaranteeing a switching frequency that stays

above the audio band.

1mm Tall Solution Height

APPLICATIONS

■

Cellular Phones

■

PDAs, Handheld Computers

■

Digital Cameras

■

MP3 Players

■

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

GPS Receivers

*Patent Pending

TYPICAL APPLICATION

Li-Ion to Six White LEDs and OLED/LCD Bias

OLED Efﬁciency

400

350

300

250

200

150

100

= 3V TO 5V

= 3.6V

OUT2

4.7µF

0.47µF

= 16V

LOAD FROM V

OUT2

15µH

16V

24mA

1µF

CAP1 SW1

SW2 CAP2 V

OUT2

LT3498

LED1 CTRL1 GND1 GND2 CTRL2 FB2

OFF OFF

10Ω

10µF

2.21MΩ

20mA

POWER LOSS

FROM V

SHUTDOWN

AND

DIMMING

CONTROL

SHUTDOWN

AND

OUT2

CONTROL

100

0.1

3498 TA01

LED CURRENT (mA)

3498 TA01b

3498f

12 3 4 5 6 7...24

中文翻译

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与LT3463A相关器件

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LT3463A_15	Linear	获取价格	Dual Micropower DC/DC Converters with Schottky Diodes
LT3463AEDD	Linear Systems	获取价格	Dual Micropower DC/DC Converters with Schottky Diodes
LT3463AEDD#TR	Linear	获取价格	LT3463 - Dual Micropower DC/DC Converters with Schottky Diodes; Package: DFN; Pins: 10; Te
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LT3463EDD	Linear Systems	获取价格	Dual Micropower DC/DC Converters with Schottky Diodes
LT3463EDD#TR	Linear	获取价格	LT3463 - Dual Micropower DC/DC Converters with Schottky Diodes; Package: DFN; Pins: 10; Te
LT3464	Linear	获取价格	Micropower Boost Converter with Integrated Schottky and Output Disconnect in ThinSOT
LT3464	ADI	获取价格	采用ThinSOT?封装并具肖特基二极管和输出断接功能的微功率升压型转换器
LT3464_1	Linear	获取价格	Micropower Boost Converter with Schottky and
LT3464ETS8	Linear	获取价格	Micropower Boost Converter with Integrated Schottky and Output Disconnect in ThinSOT

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