MAX1573

白光LED、1倍/1.5倍电荷泵，UCSP封装和薄型QFN封装

尺寸最小、效率最高的白光LED电荷泵，UCSP™封装

概述

说明

MAX1573分数型电荷泵能够以恒定电流驱动多达4只白色LED，获得均匀的亮度。它利用1倍/1.5倍分数型电荷泵和低压差电流调节器，在整个Li+电池供电电压范围内保持最高的效率。工作在1MHz固定频率，允许选用小巧的外部元件。经过优化的电流调节结构保证低EMI和低输入纹波。

利用一个外部电阻可以设置满量程LED电流，两个数字输入控制开/关或选择3级亮度中的一级。脉宽调制(PWM)信号也可以用来调节LED的亮度，无需额外的元件。

MAX1573采用微小的芯片级(UCSP™)封装(4 x 4焊球)和16引脚、薄型QFN封装。

MAX1573：典型工作电路

放大+

关键特性

专有的自适应1倍/1.5倍模式
效率(P_LED/P_BATT)高达92%
0.2%的LED电流匹配和精度
28mA/LED驱动能力
低输入纹波和EMI
无需镇流电阻
数字逻辑或PWM亮度控制
低的0.1µA关断电流
2.7V至5.5V输入电压范围
软启动限制浪涌电流
输出过压保护
过热关断保护
无需外部肖特基二极管
微型UCSP (2.1mm x 2.1mm x 0.6mm)和薄型QFN (4mm x 4mm)封装

应用

蜂窝电话/智能电话
MP3播放器
其它带有彩色显示屏的手持产品
PDA、数码相机和便携式摄像机

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

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

MAX1573

1-Cell Li+

Charge Pump

Parallel

0.028

Digital

PWM

0.5

2.7

5.5

1000

TQFN/16

UCSP (B)/16

$2.03 @1k

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

MAX1573EVKIT: MAX1573评估板

技术资料

应用笔记 3287 White-LED Driver Provides 64-Step Logarithmic Dimming
应用笔记 3243 白光LED升压转换器和电荷泵的比较

质量和环境数据

产品可靠性报告: MAX1573.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 >

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