MAX1577Y

更新时间： 2024-11-14 22:34:43

品牌	Logo	应用领域
美信 - MAXIM		闪光灯泵
页数	文件大小	规格书
11页	664K
描述
1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights

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MAX1577Y 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MAX1577Y相关器件

型号	品牌	获取价格	描述	数据表
MAX1577YETA	MAXIM	获取价格	1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights
MAX1577YETA+	MAXIM	获取价格	Switched Capacitor Regulator, 1250kHz Switching Freq-Max, BICMOS, 3 X 3 MM, 0.8 MM HEIGHT,
MAX1577YETA+T	MAXIM	获取价格	Switched Capacitor Regulator, 1250kHz Switching Freq-Max, BICMOS, 3 X 3 MM, 0.8 MM HEIGHT,
MAX1577YETA+T	ROCHESTER	获取价格	SWITCHED CAPACITOR REGULATOR, 1250kHz SWITCHING FREQ-MAX, DSO8, 3 X 3 MM, 0.8 MM HEIGHT, M
MAX1577YETA-T	MAXIM	获取价格	Switched Capacitor Regulator, 1250kHz Switching Freq-Max, BICMOS, 3 X 3 MM, 0.8 MM HEIGHT,
MAX1577Z	MAXIM	获取价格	1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights
MAX1577Z	ADI	获取价格	1.2A白光LED调节电荷泵，用于相机闪光灯和放映灯
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,

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