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| 型号： | MAX1561ETA+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR WHITE BCKLGT 8-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 800kHz ~ 1.25MHz |
| 电源电压： | 2.6 V ~ 5.5 V |
| 输出电压： | 26V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
High-Efficiency, 26V Step-Up Converters
for Two to Six White LEDs
input and output ripple, but at the expense of size and
higher cost. C COMP stabilizes the converter and con-
trols soft-start. Connect a 0.1μF capacitor from COMP
to GND. For stable operation, C OUT must not exceed
10 times C COMP .
Inductor Selection
Inductor values range from 10μH to 47μH. A 22μH
(47μH for the MAX1599) inductor optimizes the efficien-
cy for most applications while maintaining low 15mV P-P
input ripple. With input voltages near 5V, a larger value
of inductance can be more efficient. To prevent core
saturation, ensure that the inductor-saturation current
rating exceeds the peak inductor current for the appli-
cation. Calculate the peak inductor current with the fol-
lowing formula:
Applications Information
PC Board Layout
Due to fast switching waveforms and high-current
paths, careful PC board layout is required. An evalua-
tion kit (MAX1561EVKIT) is available to speed design.
Order MAX1599 samples separately.
When laying out a board, minimize trace lengths between
the IC and R SENSE , the inductor, the diode, the input
capacitor, and the output capacitor. Keep traces short,
direct, and wide. Keep noisy traces, such as the LX node
trace, away from CS. The IN bypass capacitor (C IN )
should be placed as close to the IC as possible. PGND
and GND should be connected directly to the exposed
paddle underneath the IC. The ground connections of
C IN and C OUT should be as close together as possible.
I PEAK =
V OUT ( MAX ) × I LED ( MAX )
0 . 8 × V IN ( MIN )
+
V IN ( MIN ) × 0 . 8 μ s
2 × L
The traces from IN to the inductor and from the Schottky
diode to the LEDs may be longer.
Chip Information
Schottky Diode Selection
The MAX1561/MAX1599s ’ high switching frequency
demands a high-speed rectification diode (D1) for opti-
mum efficiency. A Schottky diode is recommended due
to its fast recovery time and low forward-voltage drop.
Ensure that the diode’s average and peak current rating
exceed the average output current and peak inductor
current. In addition, the diode’s reverse breakdown volt-
age must exceed V OUT . The RMS diode current can be
calculated from:
I DIODE ( RMS ) ? I OUT × I PEAK
TRANSISTOR COUNT: 2895
PROCESS: BiCMOS
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1561EVKIT | 功能描述:LED 照明开发工具 Evaluation Kit for MAX1561 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: |
| MAX1562ESA | 功能描述:电源开关 IC - USB 4A USB Crnt-Limited w/Autoreset RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1562ESA+ | 功能描述:电源开关 IC - USB 4A USB Crnt-Limited w/Autoreset RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1562ESA+C4H | 功能描述:电源开关 IC - USB Programmable 4A USB Current-Limited Switches with Autoreset and Fault Blanking RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1562ESA+T | 功能描述:电源开关 IC - USB 4A USB Crnt-Limited w/Autoreset RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
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