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参数资料
| 型号： | MAX1574ETB+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 5/9页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 10TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | 切换式电容器（充电泵） |
| 输出数： | 3 |
| 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 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | MAX1574ETB+TDKR |
180mA, 1x/2x, White LED Charge Pump
in 3mm x 3mm TDFN
Typical Operating Characteristics (continued)
(Circuit of Figure 2, V IN = 3.6V, EN = IN, driving three white LEDs, T A = +25°C, unless otherwise noted.)
DIMMING RESPONSE
MAX1574 toc10
V IN
LINE TRANSIENT 3.8V TO 3.3V TO 3.8V
MAX1574 toc11
1V/div
V EN
2V/div
V OUT
1V/div
I OUT
50mA/div
V OUT
2V/div
I OUT
60mA,
20mA/div
10ms/div
100 μ s/div
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10
—
NAME
IN
EN
CP
CN
SET
LED3
LED2
LED1
GND
OUT
EP
FUNCTION
Supply Voltage Input. Connect a 0.47μF to 1μF ceramic capacitor from IN to GND. The input voltage
range is 2.7V to 5.5V. IN is high impedance during shutdown.
Enable and Dimming Control. Pulsing EN low dims the LEDs in multiple steps. Drive low for longer than
2ms (typ) to shut down the IC. From shutdown, drive EN high (50μs min) to set I LED to the maximum
current (see the SETfunction). Pulse EN low for 0.5μs to 500μs to dim the LEDs (Figure 1).
Transfer-Capacitor Positive Connection. Connect a 0.22μF capacitor from CP to CN.
Transfer-Capacitor Negative Connection. Connect a 0.22μF capacitor from CP to CN.
Current-Set Input. Connect a resistor (R SET ) from SET to GND to set the maximum LED current.
I LED(MAX) = 393 × 0.6V / R SET . SET is internally biased to 0.6V. SET is high impedance during shutdown.
LED_ Cathode Connection. Current flowing into LED_ is based on SET description above. In 2x mode,
the charge pump regulates the lowest LED_ voltage to 0.18V. Connect LED_ to IN for unpopulated LEDs.
LED_ is high impedance during shutdown.
Ground. Connect GND to system ground and as close as possible to the input-bypass capacitor ground.
Output. Connect a 0.47μF to 1μF ceramic capacitor from OUT to GND, and connect OUT to the anodes
of all the LEDs. OUT is pulled to ground through an internal 5k ? resistor in shutdown.
Exposed Paddle. Connect the exposed paddle directly to GND underneath the IC.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1574EVKIT | 功能描述:LED 照明开发工具 Evaluation Kit for the MAX1574 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: |
| MAX1575ETE | 功能描述:LED照明驱动器 White LED 1x/1.5x 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 |
| MAX1575ETE/V+ | 功能描述:LED照明驱动器 White LED 1x/1.5x Charge Pump for Main and Sub-Displays 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 |
| MAX1575ETE/V+T | 功能描述:LED照明驱动器 White LED 1x/1.5x Charge Pump for Main and Sub-Displays 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 |
| MAX1575ETE+ | 功能描述:LED照明驱动器 White LED 1x/1.5x 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 |
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