›

MAX1561

高效率、26V、升压型转换器，用于2到6只白光LED

26V、升压型DC-DC电源，能够以87%的效率驱动多达6只白光LED

下载数据手册

点击查看特定型号的库存状况。

概述

说明

MAX1561/MAX1599升压型转换器能够以恒定电流驱动多达6个白色LED，为蜂窝电话、PDA和其他的手持设备提供背光源。升压转换结构允许白色LED串行连接，使每个LED保持相同的电流、以获得均匀的亮度。这种配置不需要镇流电阻和昂贵的工厂校准过程。

MAX1561/MAX1599内置高电压、低R_DS(ON)的N沟道MOSFET开关，可提供较高的转换效率、有效延长电池寿命。Dual Mode™输入提供简单的亮度调整和开关控制。1MHz (MAX1599为500kHz)的高速、电流模式脉宽调制(PWM)结构允许选用小尺寸的输入、输出电容和电感，并使输入电源/电池上的纹波降至最小。可编程软启动能够消除启动过程中的浪涌电流。

两款芯片均采用节省板上空间的8引脚、3mm x 3mm、焊盘裸露(EP)的薄型DFN封装。

MAX1561、MAX1599：典型工作电路

放大+

关键特性

精确的电流调节可获得均匀亮度
效率高达87%
灵活的模拟或PWM亮度控制
内置30V MOSFET开关,最大输出功率900mW
1MHz (MAX1561)或500kHz (MAX1599)高速PWM工作频率
小尺寸外部元件
2.6V至5.5V电压输入范围
最大26V输出, 带过压保护
优化于15mV_P-P低输入纹波
具有零输入浪涌电流软启动
0.3µA关断电流
小巧的8引脚、3mm x 3mm薄型DFN封装

应用

蜂窝电话/智能电话
电子书与亚笔记本电脑
PDA、掌上电脑与无线手持装置
白色LED显示器背光

参数规格

Part Number

Battery Input

Regulation Topology

Max. No. of LEDs

LED Channels

LED Configuration

I_LED per Channel
(A)

PWM Dimming Freq.
(kHz)

Dimming Control

V_{CURR_SENSE}
(mV)

P_OUT
(W)

V_IN
(V)

I_CC
(mA)

LED String Volt.
(V)

Oper. Freq.
(kHz)

Package/Pins

Budgetary
Price

max

min

max

See Notes

MAX1561

1-Cell Li+

Inductor Based

Series

0.02

200

Analog

PWM

100

0.9

2.6

5.5

0.55

1000

TDFN/8

$1.36 @1k

MAX1599

500

TDFN/8

查看所有LED Drivers (80)

Pricing Notes:

价格仅供参考，用于同类产品的比较。所提供报价为美元，需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题，请参考：价格与供货网站或与指定代理商联系。

设计资源

MAX1561EVKIT: MAX1561评估板

技术资料

应用笔记 3256 白色LED的恒流驱动
应用笔记 3243 白光LED升压转换器和电荷泵的比较
参考原理图 1804 Driving LEDs in Battery-Operated Applications: Controlling Brightness Power Efficiently

质量和环境数据

产品可靠性报告: MAX1561.pdf
无铅封装的锡（Sn）晶须报告

质量与环境

型号	生产流程	工艺	样本量	不合格	FIT @ 25°C	FIT @ 55°C

备注：通过技术手段对故障率进行汇总，并映射到相关的材料部件号。故障率与被测件的数量密切相关。

质量管理体系 >
环境管理体系 >

订购

Status:

Package:

Temperature:

新产品

MAX25024
Automotive Low Input Voltage I²C 4-Channel 150mA Backlight Driver Supporting ASIL B

Wide Voltage-Range Operation
High Integration
Robust and Low EMI

MAX25613
Automotive Infrared LED Controller

High-Current LED Driver with Reduced di/dt on the Battery Harness
Protection Features Increase System Reliability
Automotive Ready

MAX25601C
Synchronous Boost and Synchronous Buck LED Controllers

Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Cost
Wide Dimming Ratio Allows High Contrast Ratio
Protection Features and Wide Temperature Range Increase System Reliability

MAX25601D
Synchronous Boost and Synchronous Buck LED Controllers

Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Cost
Wide Dimming Ratio Allows High Contrast Ratio
Protection Features and Wide Temperature Range Increase System Reliability

MAX25601A
Synchronous Boost and Synchronous Buck LED Controllers

Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Cost
Wide Dimming Ratio Allows High Contrast Ratio
Protection Features and Wide Temperature Range Increase System Reliability

MAX25601B
Synchronous Boost and Synchronous Buck LED Controllers

Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Cost
Wide Dimming Ratio Allows High Contrast Ratio
Protection Features and Wide Temperature Range Increase System Reliability

MAX20056B
Integrated, 6-Channel High-Brightness LED Driver with Very Wide PWM Dimming Ratio and Phase Shifting for Automotive Displays

Robust with Respect to EMC and Automotive Battery Transients
Spread-Spectrum Mode Reduces Emission at the Switching Frequency and its Harmonics
Phase-Shift Dimming of LED Strings

MAX25612
汽车应用同步、高压LED控制器

高度集成最大程度降低BOM和成本
优化效率、电路板空间和输入工作范围
保护特性提高系统可靠性

封装信息

技术文档

类型	编号	标题
应用笔记	3256	白色LED的恒流驱动
应用笔记	3243	白光LED升压转换器和电荷泵的比较
参考原理图	1804	Driving LEDs in Battery-Operated Applications: Controlling Brightness Power Efficiently