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参数资料
| 型号： | MAX1576ETG+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/14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 |
480mA White LED 1x/1.5x/2x Charge Pump for
Backlighting and Camera Flash
1 μ F
1 μ F
INPUT
2.7V TO 5.5V
C1P
C1N
C2P
C2N
OUTPUT
UP TO 480mA
4.7 μ F
1 μ F
INP
IN
OUT
4.7 μ F
MAIN
FLASH
GND1
MAX1576
LED1
LED2
ON/OFF AND
CURRENT
SETTING
ENM1
ENM2
ENF1
ENF2
LED3
LED4
LED5
LED6
LED7
LED8
SETM
SETF
GND2
PGND
Figure 6. Providing Increased LED Current per LED
1 μ F
1 μ F
INPUT
2.7V TO 5.5V
C1P
C1N
C2P
C2N
OUTPUT
UP TO 260mA
4.7 μ F
1 μ F
INP
IN
OUT
4.7 μ F
MAIN
FLASH
GND1
MAX1576
LED1
LED2
IN
ON/OFF AND
CURRENT
SETTING
ENM1
ENM2
ENF1
ENF2
LED3
LED4
LED5
LED6
LED7
IN
LED8
SETM
SETF
GND2
PGND
Figure 7. Schematic for when Fewer than 8 LEDs is Acceptable
Driving Fewer than 8 LEDs
When driving fewer than 8 LEDs, two different connec-
tion schemes can be used. The first scheme is shown
in Figures 2 and 6, where LED_ is connected to the
adjacent LED_. This method allows increased current
through the LED and effectively allows total LED current
to be I LED multiplied by the number of pins connected.
The second method of connection is shown in Figure 7,
where standard white LEDs are used and fewer than 8
are connected. This scheme does not alter current
through each LED but ensures that the unused LED_ is
properly terminated.
Input Ripple
For LED drivers, input ripple is more important than out-
put ripple. Input ripple is highly dependent on the
source supply’s impedance. Adding a lowpass filter to
the input further reduces input ripple. Alternately,
increasing C IN to 10μF cuts input ripple in half with only
a small increase in footprint. The 1x mode always has
very low input ripple.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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