Datasheet > MAX1574

MAX1574

更新时间： 2024-09-10 14:57:35

品牌	Logo	应用领域
亚德诺 - ADI		泵
页数	文件大小	规格书
9页	214K
描述
180mA、1倍/2倍、白光LED电荷泵，3mm x 3mm TDFN封装

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数据手册

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MAX1574 数据手册

19-3117; Rev 0; 12/03

180mA, 1x/2x, White LED Charge Pump

in 3mm x 3mm TDFN

General Description

Features

The MAX1574 charge pump drives up to three white

LEDs with regulated constant current for uniform intensity.

By utilizing adaptive 1x/2x charge-pump modes and

very-low-dropout current regulators, it achieves 180mA

output drive capability and high efficiency over the 1-cell

lithium-battery input voltage range. Fixed-frequency

(1MHz) switching allows for tiny external components,

and the regulation scheme is optimized to ensure low EMI

and low input ripple.

♦ Up to 180mA (60mA/LED) Drive Capability

♦ 83% Average Efficiency (P

/ P

) Over Li+

LED

BATT

Battery Discharge

♦ 0.5% (typ) LED Current Matching

♦ Adaptive 1x/2x Mode Switchover

♦ Low Input Ripple and EMI

♦ 5% to 100% Dimming Through Single-Wire Serial

The MAX1574 uses an external resistor to set the full-

scale 100% LED current. An enable input (EN) is used for

simple on/off control or can be pulsed repeatedly to set

lower LED current in multiple steps down to 5%. Once the

desired brightness is set, the MAX1574 maintains con-

stant LED current as long as EN is kept high. If EN is kept

low for more than 2ms, the MAX1574 enters shutdown.

Pulse Interface

♦ Low 0.1µA Shutdown Current

♦ 2.7V to 5.5V Supply Voltage Range

♦ Soft-Start Limits Inrush Current

♦ Output Overvoltage Protection

♦ Thermal-Shutdown Protection

♦ 10-Pin 3mm x 3mm TDFN Package

The MAX1574 is available in a 10-pin 3mm x 3mm TDFN

package (0.8mm max height).

Applications

Ordering Information

LCD Backlighting

PIN-

PACKAGE

TOP

MARK

PART

TEMP RANGE

Camera Strobes/Flashes and Movie Lights

Cell Phones/Smart Phones

10 TDFN

3mm x 3mm

MAX1574ETB

-40°C to +85°C

ABB

PDAs, Digital Cameras, and Camcorders

Typical Operating Circuit

Pin Configuration

0.22µF

TOP VIEW

2.7V TO 5.5V

UP TO 180mA

OUT

1µF

MAX1574

GND

MAX1574

LED1

LED2

LED3

ON/OFF AND

DIMMING

SET

TDFN

3mm × 3mm

________________________________________________________________ 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...9

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与MAX1574相关器件

型号	品牌	获取价格	描述	数据表
MAX1574ETB	MAXIM	获取价格	180mA, 1x/2x, White LED Charge Pump in 3mm x 3mm TDFN
MAX1574ETB+	MAXIM	获取价格	LED Driver, 3-Segment, BICMOS, 3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, MO-229WEED-3, TDF
MAX1574ETB+G104	MAXIM	获取价格	LED Driver, 3-Segment, BICMOS, 3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, MO-229WEED-3, TDF
MAX1574ETB+T	MAXIM	获取价格	LED Driver, 3-Segment, BICMOS, 3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, MO-229WEED-3, TDF
MAX1574ETB+TG104	MAXIM	获取价格	LED Driver, 3-Segment, BICMOS, 3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, MO-229WEED-3, TDF
MAX1574ETB-T	MAXIM	获取价格	LED Driver, 3-Segment, BICMOS, 3 X 3 MM, 0.80 MM HEIGHT, MO-229WEED-3, TDFN-10
MAX1575	MAXIM	获取价格	MAX1575 Evaluation Kit
MAX1575ETE	MAXIM	获取价格	White LED 1x/1.5x Charge Pump for Main and Sub-Displays
MAX1575ETE/V+	MAXIM	获取价格	LED Driver
MAX1575ETE/V+T	MAXIM	获取价格	LED Driver

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