Datasheet > MAX1577Z

MAX1577Z

更新时间： 2024-11-16 02:51:03

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
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描述
1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights

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MAX1577Z 数据手册

19-3461; Rev 0; 11/04

1.2A White LED Regulating Charge Pump for

Camera Flashes and Movie Lights

General Description

Features

The MAX1577Y/MAX1577Z charge pumps drive white

LEDs, including camera strobes, with regulated current

up to 1.2A (guaranteed to 800mA). The very low open-

loop output resistance allows high flash brightness,

even from a low battery input voltage. The adaptive

1x/2x regulating charge-pump operation provides high

efficiency (up to 92%) while in movie mode or back-

lighting. Fast (1MHz) switching allows the use of tiny

external components.

♦ Up to 1.2A Output Drive Capability (800mA

Guaranteed)

♦ Up to 92% P

/ P

Efficiency for Movie

BATT

LED

Mode

♦ Flexible Brightness Control

Two-Bit Logic for 100%, 33%, 20%, and Off

PWM for 20% to 100%

♦ 3% Current Regulation Over Line and

Temperature

♦ Current or Voltage Regulation for Flash and

Backlighting (MAX1577Y)

♦ Current Regulation for Flash (MAX1577Z)

The MAX1577Y/MAX1577Z use an external resistor to

set the full-scale LED current. Two enable inputs (EN1

and EN2) provide simple on/off control and LED current

of 20%, 33%, or 100% full scale. If there is less than

24mV across the external resistor, the output voltage is

regulated. The MAX1577Z has fixed 5.1V output-volt-

age regulation, while the MAX1577Y has logic-con-

trolled output voltage of 3.4V, 4.6V, or 5.1V for

backlighting, keyboard, and RGB applications.

♦ Low Ripple and EMI

♦ 2.7V to 5.5V Supply Voltage Range

♦ Soft-Start Limits Inrush Current

♦ Output-Voltage Regulation Mode

♦ Thermal-Shutdown Protection

♦ 8-Pin 3mm x 3mm TDFN Package

The MAX1577Y/MAX1577Z are available in an 8-pin,

3mm x 3mm TDFN package (0.8mm max height).

Applications

White LED Flashes, Strobes, and Movie Lights

Ordering Information

LCD Backlighting

PIN-

PACKAGE

TOP

MARK

PART

TEMP RANGE

Camera Phones, Cell Phones, and Smart Phones

PDAs, Digital Cameras, and Camcorders

8 TDFN

(T833-2)

MAX1577YETA

-40°C to +85°C

AMG

AMQ

8 TDFN

(T833-2)

MAX1577ZETA

-40°C to +85°C

Typical Operating Circuit

Pin Configuration

1µF OR 2.2µF

TOP VIEW

UP TO 1.2A

5.3V OVP

10µF

2.7V TO 5.5V

OUT

4.7µF

GND

MAX1577Y

MAX1577Z

OUT

- (300mV OR

100mV OR 60mV)

100%,

33%, 20%,

AND

EN1

EN2

SHUTDOWN

TDFN

________________________________________________________________ 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...11

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与MAX1577Z相关器件

型号	品牌	获取价格	描述	数据表
MAX1577ZETA	MAXIM	获取价格	1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights
MAX1577ZETA+	MAXIM	获取价格	Switched Capacitor Regulator, 1250kHz Switching Freq-Max, BICMOS, 3 X 3 MM, 0.8 MM HEIGHT,
MAX1577ZETA+T	MAXIM	获取价格	Switched Capacitor Regulator, 1250kHz Switching Freq-Max, BICMOS, 3 X 3 MM, 0.8 MM HEIGHT,
MAX1578	MAXIM	获取价格	Complete Bias and White LED Power Supplies for Small TFT Displays
MAX1578ETG	MAXIM	获取价格	Complete Bias and White LED Power Supplies for Small TFT Displays
MAX1578ETG+	MAXIM	获取价格	暂无描述
MAX1578ETG+T	MAXIM	获取价格	LED Driver, 1-Segment, BICMOS, 4 X 4 MM, 0.80 MM HEIGHT, LEAD FREE, MO-220WGGD-2, TQFN-24
MAX1578ETG-T	MAXIM	获取价格	LED Driver, 1-Segment, BICMOS, 4 X 4 MM, 0.80 MM HEIGHT, MO-220WGGD-2, TQFN-24
MAX1578-MAX1579	MAXIM	获取价格	Complete Bias and White LED Power Supplies for Small TFT Displays
MAX1579	MAXIM	获取价格	Complete Bias and White LED Power Supplies for Small TFT Displays

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