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MAX1577

更新时间： 2024-09-10 02:51:03
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美信 - MAXIM /
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11页 670K
描述
1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights

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MAX1577 数据手册

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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  
8
7
6
5
CP  
IN  
CN  
UP TO 1.2A  
5.3V OVP  
10µF  
2.7V TO 5.5V  
OUT  
4.7µF  
GND  
MAX1577Y  
MAX1577Z  
MAX1577Z  
V
OUT  
- (300mV OR  
100mV OR 60mV)  
100%,  
33%, 20%,  
AND  
CS  
EN1  
EN2  
1
2
3
4
SHUTDOWN  
TDFN  
________________________________________________________________ Maxim Integrated Products  
1
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.  
1234567...11

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与MAX1577相关器件

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MAX1577Y MAXIM

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 		1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights
MAX1577YETA MAXIM

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 		1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights
MAX1577YETA+ MAXIM

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 		Switched Capacitor Regulator, 1250kHz Switching Freq-Max, BICMOS, 3 X 3 MM, 0.8 MM HEIGHT,
MAX1577YETA+T MAXIM

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 		Switched Capacitor Regulator, 1250kHz Switching Freq-Max, BICMOS, 3 X 3 MM, 0.8 MM HEIGHT,
MAX1577YETA+T ROCHESTER

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 		SWITCHED CAPACITOR REGULATOR, 1250kHz SWITCHING FREQ-MAX, DSO8, 3 X 3 MM, 0.8 MM HEIGHT, M
MAX1577YETA-T MAXIM

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 		Switched Capacitor Regulator, 1250kHz Switching Freq-Max, BICMOS, 3 X 3 MM, 0.8 MM HEIGHT,
MAX1577Z MAXIM

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 		1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights
MAX1577Z ADI

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 		1.2A白光LED调节电荷泵，用于相机闪光灯和放映灯
MAX1577ZETA MAXIM

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 		1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights
MAX1577ZETA+ MAXIM

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 		Switched Capacitor Regulator, 1250kHz Switching Freq-Max, BICMOS, 3 X 3 MM, 0.8 MM HEIGHT,

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