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MAX1579ETG+

更新时间： 2024-11-15 13:10:27

品牌	Logo	应用领域
美信 - MAXIM		显示器
页数	文件大小	规格书
13页	222K
描述
LED Driver, 1-Segment, BICMOS, 4 X 4 MM, 0.80 MM HEIGHT, LEAD FREE, MO-220WGGD-2, TQFN-24

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MAX1579ETG+ 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	QFN
包装说明：	HVQCCN, LCC24,.16SQ,20	针数：	24
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	6 weeks
风险等级：	5.33	接口集成电路类型：	LED DISPLAY DRIVER
JESD-30 代码：	S-XQCC-N24	JESD-609代码：	e3
长度：	4 mm	湿度敏感等级：	1
复用显示功能：	NO	功能数量：	1
区段数：	1	端子数量：	24
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	UNSPECIFIED	封装代码：	HVQCCN
封装等效代码：	LCC24,.16SQ,20	封装形状：	SQUARE
封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
电源：	3/5 V	认证状态：	Not Qualified
座面最大高度：	0.8 mm	子类别：	Display Drivers
最大供电电压：	5.5 V	最小供电电压：	2.7 V
标称供电电压：	3 V	表面贴装：	YES
技术：	BICMOS	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	NO LEAD
端子节距：	0.5 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	4 mm
Base Number Matches：	1

MAX1579ETG+ 数据手册

19-3359; Rev 0; 8/04

Co m p le t e Bia s a n d Wh it e LED P o w e r S u p p lie s

fo r S m a ll TFT Dis p la ys

Ge n e ra l De s c rip t io n

Fe a t u re s

♦ Four Regulators in One Package

The MAX1578/MAX1579 provide four regulated outputs

to meet all the voltage requirements for small active-

matrix TFT-LCD displays in handheld devices where

minimum external components and high efficiency are

re q uire d . Ea c h d e vic e c ons is ts of thre e a d va nc e d

charge pumps for LCD bias power and a step-up con-

verter for driving up to 8 series white LEDs for back-

lighting. The input voltage range is from 2.7V to 5.5V.

♦ Bias Power Using Charge Pumps

+5V at 25mA for Source Driver

+15V at 100µA for V

-10V at 100µA for V

OFF

No External Diodes Required

Output Sequencing

POS, NEG, and MAIN Are Autodischarged

During Shutdown

The charge pumps provide fixed +5V, +15V, and -10V

for the LCD bias circuits. No external diodes are need-

ed. A high-efficiency, fractional (1.5x/2x) charge pump

followed by a low-dropout linear regulator provides +5V

to power the source driver. Automatic mode changing

achieves the highest conversion efficiency. Two multi-

stage, high-voltage charge pumps generate +15V and

♦ LED Backlight Power Using Boost Converter

Series LED Connection for Uniform Illumination

Supports Up to 8 LEDs at 25mA (max)

900mW (max) Power

PWM or Analog Dimming Control

Overvoltage Protection

Low Input/Output Ripple

-10V to provide V

and V , respectively. Utilizing a

OFF

Soft-Start with Zero Inrush Current

Fast 1MHz PWM Operation for Small

Component Size

unique clocking scheme and internal drivers, these

charge pumps eliminate parasitic charge-current glitch-

es and reduce maximum input current, resulting in low

electromagnetic emissions. The outputs are sequenced

during startup and shutdown. In shutdown, the outputs

are discharged to zero.

Temperature Derating Function (MAX1579)

♦ High Efficiency

Bias: 83% (5.0V at 25mA, 15V/-10V at 100µA)

LED: 84% (6 LEDs at 20mA)

The high-efficiency inductor step-up converter drives

up to 8 white LEDs in series with a constant current to

provide backlighting. The series connection allows the

LED currents to be identical for uniform brightness and

minimize s the numb e r of tra c e s to the LEDs . The

MAX1578 re g ula te s c ons ta nt LED c urre nt ove r the

entire temperature range. The MAX1579 features a tem-

p e ra ture d e ra ting func tion to a void ove rd riving the

white LEDs during high ambient temperatures, enabling

higher drive current below +42°C.

♦ Uses Only Ceramic Capacitors and Only One

Inductor

♦ Independent Enable Inputs for LED and Bias

Power

♦ Thermal-Shutdown Protection

♦ 1µA Shutdown Current

♦ Tiny 4mm x 4mm Thin QFN Package

P in Co n fig u ra t io n

The MAX1578/MAX1579 are available in space-saving

24-lead 4mm x 4mm thin QFN packages.

18 17 16 15 14 13

Ap p lic a t io n s

PDAs, Palmtops

C1N 19

GND

ONBIAS

NEG

Smart Phones

C2N

Internet Appliances

CD2

MAX1578

MAX1579

C2P

LCD Displays with White LED Backlight

CD1

C1P 23

Ord e rin g In fo rm a t io n

PMPB

PART

TEMP RANGE PIN-PACKAGE

24 Thin QFN 4mm x 4mm

MAX1578ETG

-40°C to +85°C

(T2444-4)

24 Thin QFN 4mm x 4mm

(T2444-4)

THIN QFN

4mm x 4mm

MAX1579ETG

See Figure 3 for Typical Application Circuit.

________________________________________________________________ Maxim Integrated Products

For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...13

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MAX1579ETG+ 替代型号

型号	品牌	替代类型	描述	数据表
MAX1579ETG	MAXIM	完全替代	Complete Bias and White LED Power Supplies for Small TFT Displays

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