Datasheet > ZXLD1321

ZXLD1321

更新时间： 2024-11-29 03:07:15

品牌	Logo	应用领域
捷特科 - ZETEX		转换器驱动 DC-DC转换器
页数	文件大小	规格书
20页	464K
描述
Boost mode DC-DC converter for LED driving with 1A output and current control

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中文翻译

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ZXLD1321 数据手册

ZXLD1321

Boost mode DC-DC converter for LED driving with 1A

output and current control

Description

The ZXLD1321 is an inductive DC-DC The feedback control circuitry inside the

converter, with an internal switch, designed ZXLD1321 provides excellent load and current

for driving single or multiple LEDs in series up regulation, resulting in very stable LED current

to a total of 1A output current.

over the useful life of the battery and over the

full operating temperature range.

Applications cover commercial environments

with input voltages ranging from 1.2V to 12V. The LED current can be adjusted from 100%

down to 10% of the set value by applying a dc

The device employs a variable 'on' and 'off'

voltage to the ADJ pin and down to 1% by

time control scheme with adjustable peak

applying a PWM signal to the ADJ pin. An on-

switch current limiting and supports step-up

chip LED protection circuit also allows output

(Boost) mode and self-powering Bootstrap

current to be reduced linearly above

operating modes, offering higher power

efficiency and lower system cost than

conventional PFM circuitry.

predetermined threshold temperature using an

external thermistor at the TADJ pin.

External resistors set nominal average LED

current and coil peak current independently.

The device includes the DC-DC converter, a

high-side current monitor and an NPN

switching transistor to provide an integrated The device can be shut down by applying a

solution offering small PCB size, competitive continuous low level dc voltage to the ADJ pin.

cost/performance, high power efficiency of

DC-DC conversion and maximum LED

brightness/reliability. More importantly, it

retains design flexibility to add customer

specific features.

Features

Applications

•

1.2V to 12V Input voltage range

•

High power LED flashlights

LED back-up lighting

General LED lighting

Emergency lighting

Up to 1A output current

Typical efficiency >85%

Bootstrap operation enables input voltage

down to 1V

•

User-defined thermal control of LED

output current using external thermistor

High output current stability over input

voltage and temperature

•

12µA typical standby current

LED current adjustable from 100%

down to 2%

•

Adjustable soft-start

Drives up to 5 white LEDs in series

Note^#: Using standard external components as specified under electrical characteristics. Efficiency is dependent upon

external component types and values. Higher efficiency is possible with alternative coils.

Issue 1 - January 2008

www.zetex.com

12 3 4 5 6 7...20

中文翻译

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与ZXLD1321相关器件

型号	品牌	获取价格	描述	数据表
ZXLD1321DCATC	ZETEX	获取价格	Boost mode DC-DC converter for LED driving with 1A output and current control
ZXLD1321DCATC	DIODES	获取价格	Boost mode DC-DC converter for LED driving with 1A
ZXLD1322	DIODES	获取价格	BUCK/BOOST MODE DC-DC CONVERTER
ZXLD1322	ZETEX	获取价格	Buck/boost mode DC-DC converter for LED driving with 700mA output and current control
ZXLD1322DCCTC	DIODES	获取价格	BUCK/BOOST MODE DC-DC CONVERTER
ZXLD1322DCTC	ZETEX	获取价格	Buck/boost mode DC-DC converter for LED driving with 700mA output and current control
ZXLD1350	ZETEX	获取价格	350mA LED driver with internal switch
ZXLD1350	DIODES	获取价格	30V 350mA LED DRIVER with AEC-Q100
ZXLD1350_07	ZETEX	获取价格	350mA LED driver with internal switch
ZXLD1350ET5TA	ZETEX	获取价格	350mA LED driver with internal switch

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