Datasheet > LT3498

LT3498

更新时间： 2024-11-07 14:57:27

品牌	Logo	应用领域
亚德诺 - ADI		驱动肖特基二极管驱动器
页数	文件大小	规格书
4页	235K
描述
采用 3mm x 2mm DFN 封装、具集成肖特基二极管的 20mA LED 驱动器和 OLED 驱动器

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中文翻译

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LT3498 数据手册

DEMO CIRCUIT 1137

LT3498

QUICK START GUIDE

LT3498

20mA Six White LED Driver and OLED

driver with Integrated Schottky

WARNING!

DO NOT LOOK AT OPERATING LED.

This circuit produces light that can damage eyes.

DESCRIPTION

Demonstration circuit 1137 is a 20mA Six White When CTRL2 is higher than 1.5V, the demo

LED Driver and OLED driver with Integrated board OLED side output is 16V. It can deliver up

Schottky featuring the LT3498. The LT3498 is a to 24mA from a 3V source. The OLED driver

dual output boost converter featuring a 2.3MHz features a novel PFM control technique. This

PWM LED driver and a PFM (Pulse Frequency technique results in low output voltage ripple

Modulation) OLED driver. The demo board is

and high efficiency over a wide load range. An

designed to operate from 3V to 5V, ideal for Li- internal PMOS output disconnect switch turns

Ion battery powered dual display applications, itself off in shutdown, disconnecting the output

such as main and sub-displays for cell phones.

from the input source. This disconnect function

is often required in OLED applications. This

switch also minimizes leakage current drain

from the battery.

The LED driver runs at 2.3MHz fixed frequency,

results in tiny circuit size. It can drive 6 white

LEDs at 20mA from a minimum of 3V. The

demo board offers flexible LED dimming meth- The LT3498 datasheet gives complete descrip-

ods. Users can use DC dimming, filter PWM tion of the part, operation and application infor-

dimming or direct PWM dimming. A MOSFET in mation. The datasheet must be read in conjunc-

series with the LED string disconnects the out- tion with this quick start guide for working on or

put capacitor discharge path if PWM terminal modifying the demo circuit 1137.

becomes low. This results in higher direct PWM

Design files for this circuit board are avail-

dimming ratio. The high side LED current sens-

able. Call the LTC factory.

ing is versatile. The parts functions as a “one-

wire” current source from the LED string point of

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

view. The circuit protection clamps LED driver

output to 27V (typ) in open circuit condition.

12 3 4

中文翻译

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与LT3498相关器件

型号	品牌	获取价格	描述	数据表
LT3498EDDB	Linear	获取价格	20mA LED Driver and OLED Driver with Integrated Schottky in 3mm x 2mm DFN
LT3498EDDB#TR	Linear	获取价格	IC LED DISPLAY DRIVER, PDSO12, 3 X 2 MM, PLASTIC, DFN-12, Display Driver
LT3498EDDB#TRM	Linear	获取价格	IC LED DISPLAY DRIVER, PDSO12, 3 X 2 MM, PLASTIC, DFN-12, Display Driver
LT3498EDDB#TRMPBF	ADI	获取价格	20mA LED Driver and OLED Driver with Integrated Schottky in 3mm x 2mm DFN
LT3500	Linear	获取价格	Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
LT3500	ADI	获取价格	单片式 2A 降压型稳压器和线性稳压器/控制器
LT3500EDD#PBF	Linear	获取价格	LT3500 - Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller; Package: DFN;
LT3500EDD#TRPBF	Linear	获取价格	暂无描述
LT3500EDD-PBF	Linear	获取价格	Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
LT3500EDD-TRPBF	Linear	获取价格	Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller

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