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参数资料
| 型号： | MAX1574ETB+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/9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
Table 1. Recommended Components
COMPONENT
DESIGNATION
C IN , C OUT
C1
D1, D2, D3
R SET
VALUE
1μF
0.22μF
0.47μF
—
As Required
MANUFACTURER
Taiyo Yuden
TDK
Taiyo Yuden
TDK
Taiyo Yuden
TDK
Nichia
Citizen
Kamaya
Panasonic
PART NUMBER
JMK107BJ105KA
C1005X5R0J105M
JMK105BJ224KV
C1005X5R0J224K
JMK105BJ474KV
C1005X5R0J474K
NSCW215T
CL-470S
—
DESCRIPTION
1μF ±10%, 6.3V X5R ceramic capacitors (0603)
1μF ±20%, 6.3V X5R ceramic capacitors (0402)
0.22μF ±10%, 6.3V X5R ceramic capacitor (0402)
0.22μF ±10%, 6.3V X5R ceramic capacitor (0402)
0.47μF ±10%, 6.3V X5R ceramic capacitor (0402)
0.47μF ±10%, 6.3V X5R ceramic capacitor (0402)
White LEDs
White LED flash module
1% resistor
Applications Information
Driving Fewer than Three LEDs
When driving fewer than three LEDs, connect any unused
LED_ directly to IN (Figure 3). When connected in this
manner, the corresponding LED driver is disabled.
Driving Camera Strobes/Flashes
The MAX1574’s 180mA output capability makes it suit-
able for driving white LED camera strobes/flashes. For
example, the typical operating circuit drives a 3-LED
flash module with up to 60mA/LED. To ensure 180mA
total drive capability at low input voltages, increase C1
to 0.47μF.
To drive fewer or more LEDs with regulated total cur-
rent up to 180mA or to reduce the number of connect-
ing wires, short LED1, LED2, and LED3 together. When
connected this way, some LED modules have good
LED-to-LED forward-voltage matching, while others
may require individual ballast resistors. It is a good
idea to keep the ballast resistance as low as practical
for reasonable matching because high-ballast resis-
tance reduces the output drive capability due to the
higher V OUT requirement.
Input Ripple
For LED drivers, input ripple is more important than out-
put ripple. Input ripple depends on the source supply’s
impedance. Adding a lowpass filter to the input further
reduces input ripple. Alternatively, increasing C IN to
2.2μF cuts input ripple in half with only a small increase in
footprint. The 1x mode always has very low input ripple.
Component Selection
Use only ceramic capacitors with an X5R, X7R, or better
dielectric. See Table 1 for a list of recommended parts.
PC Board Layout and Routing
The MAX1574 is a high-frequency switched-capacitor
voltage regulator. For best circuit performance, use a
solid ground plane and place C IN , C OUT , and C1 as
close to the MAX1574 as possible. Refer to the
MAX1574 evaluation kit for an example.
_______________________________________________________________________________________
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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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