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| 型号： | MAX1576ETG+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 24-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 恒定电流： | 是 |
| 拓扑： | 线性（LDO），PWM，切换式电容器（充电泵） |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
ATION
EVALU
AVAIL
19-3326; Rev 1; 8/05
KIT
ABLE
480mA White LED 1x/1.5x/2x Charge Pump for
Backlighting and Camera Flash
General Description
The MAX1576 charge pump drives up to 8 white LEDs
with regulated constant current for uniform intensity.
The main group of LEDs (LED1–LED4) can be driven
up to 30mA per LED for backlighting. The flash group
of LEDs (LED5–LED8) are independently controlled and
can be driven up to 100mA per LED (or 400mA total).
By utilizing adaptive 1x/1.5x/2x charge-pump modes
and very-low-dropout current regulators, the MAX1576
achieves high efficiency over the full 1-cell lithium-bat-
tery voltage range. The 1MHz fixed-frequency switch-
ing allows for tiny external components, and the
regulation scheme is optimized to ensure low EMI and
low input ripple.
The MAX1576 uses two external resistors to set the
main and flash full-scale (100%) LED currents. Four
control pins are used for LED dimming by either serial
control or 2-bit logic per group. ENM1 and ENM2 set
the main LEDs to 10%, 30%, or 100% of full scale.
ENF1 and ENF2 set the flash LEDs to 20%, 40%, or
100% of full scale. In addition, connect either pair of
control pins together for single-wire, serial pulse dim-
ming control.
The MAX1576 is available in a 24-pin thin QFN, 4mm x
4mm package (0.8mm max height).
Features
? Powers Up to 8 LEDs
Up to 30mA/LED Drive for Backlight
Up to 400mA Total Drive for Flash
? 85% Average Efficiency (P LED / P BATT ) Over Li+
Battery Discharge
? 0.7% Typical LED Current Matching
? Adaptive 1x/1.5x/2x Mode Switchover
? Flexible Brightness Control
Single-Wire, Serial Pulse Interface (5% to 100%)
2-Bit (3 Levels) Logarithmic Logic
? Low Input Ripple and EMI
? Low 0.1μA Shutdown Current
? 2.7V to 5.5V Supply Voltage Range
? Soft-Start Limits Inrush Current
? Output Overvoltage Protection
? Thermal-Shutdown Protection
? 24-Pin Thin QFN, 4mm x 4mm Package
Ordering Information
Camera Phones
LCD Backlights
LED Camera Flashes
Applications
PART
MAX1576ETG
MAX1576ETG+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
24 Thin QFN 4mm x
4mm (T2444-4)
24 Thin QFN 4mm x
4mm (T2444-4)
Cell Phones and Smart Phones
PDAs, Digital Cameras, and Camcorders
1 μ F
INPUT
1 μ F
+ Denotes lead-free package.
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
OUTPUT
1 μ F
2.7V TO 5.5V
4.7 μ F
INP
IN
C1P
C1N
C2P
C2N
OUT
UP TO 480mA
4.7 μ F
MAIN
FLASH
GND1
LED1
ENM1
MAX1576Y
LED2
LED3
ON/OFF AND
CURRENT
SETTING
ENM2
ENF1
ENF2
LED4
LED5
LED6
LED7
SETM
SETF
GND2
PGND
LED8
________________________________________________________________ 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.
1
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相关代理商/技术参数 |
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|---|---|
| MAX1576ETG+ | 功能描述:LED照明驱动器 White LED 1/1.5/2x Charge Pump RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX1576ETG+T | 功能描述:LED照明驱动器 White LED 1/1.5/2x Charge Pump RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX1576ETG-T | 功能描述:LED照明驱动器 RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX1576EVKIT | 功能描述:LED 照明开发工具 Evaluation Kit for the MAX1576 RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MAX1577YETA | 制造商:Maxim Integrated Products 功能描述:1.1A WHITE LED REGULATING CHARGE PU - Rail/Tube |
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