ZXLD1322

更新时间： 2024-10-14 07:42:39

品牌	Logo	应用领域
美台 - DIODES		转换器 DC-DC转换器
页数	文件大小	规格书
17页	271K
描述
BUCK/BOOST MODE DC-DC CONVERTER

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中文翻译

获取价格

数据手册

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ZXLD1322 数据手册

A Product Line of

Diodes Incorporated

ZXLD1322

BUCK/BOOST MODE DC-DC CONVERTER FOR LED DRIVING WITH 700mA OUTPUT AND CURRENT

CONTROL

Description

The ZXLD1322 is an inductive DC-DC converter, with an internal switch, designed for driving single or multiple LEDs in

series up to a total of 700mA output current. Applications cover input voltages ranging from 2.5V to 15V. Depending upon

supply voltage and external components, this can provide up to 12W of output power. The device employs a variable 'on'

and 'off' time control scheme with adjustable peak switch current limiting and operates in Buck/Boost mode, offering higher

power efficiency and lower system cost than conventional PFM buck/boost circuitry. The device includes the DC-DC

converter, a high-side current monitor and an NPN switching transistor to provide an integrated solution offering small PCB

size, competitive 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. The feedback control circuitry inside the

ZXLD1322 provides excellent load and current regulation, resulting in very stable LED current over the useful life of the

battery and over the full operating temperature range. The LED current can be adjusted from 100% down to 10% of the set

value by applying a dc voltage to the ADJ pin and down to 1% by applying a PWM signal. An on-chip LED protection circuit

also allows output current to be reduced linearly above a 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 can

be shut down by applying a continuous low level dc voltage to the ADJ pin.

Features

Pin Assignments

•

2.5V to 15V Input Voltage Range

Up to 700mA output current

Typical efficiency^#>80%

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

(Top View)

Capable of driving 3 LEDs in series

DFN4030-14 with Exposed Pad

4mm x 3mm

Applications

0.50mm pitch

•

High power LED flashlights

LED back-up lighting

General LED lighting

1.5W @ T_A= 70°C

Typical Application Circuit

DFN4030-14 Package(Bottom View)

45° chamfer denote Pin 1

Notes:

#. 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.

1 of 17

www.diodes.com

April 2010

ZXLD1322

Document number: DS32166 Rev. 3 - 2

12 3 4 5 6 7...17

中文翻译

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与ZXLD1322相关器件

型号	品牌	获取价格	描述	数据表
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
ZXLD1350EV3	ZETEX	获取价格	circuit diagram and bill of materials
ZXLD1350Q	DIODES	获取价格	AUTOMOTIVE COMPLIANT 350mA BUCK LED DRIVER
ZXLD1350Q_17	DIODES	获取价格	AUTOMOTIVE COMPLIANT 350mA BUCK LED DRIVER
ZXLD1350QET5TA	DIODES	获取价格	LED Driver,

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