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| 型号： | ZXLD1370EST16TC |
| 厂商： | Diodes Inc |
| 文件页数： | 22/39页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HIGH BRIGHT TSSOP-16 |
| 特色产品： | ZXLD1370 High Accuracy LED Driver |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载，通用 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 300kHz ~ 1MHz |
| 电源电压： | 6 V ~ 60 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1478 (CN2011-ZH PDF) |
| 其它名称： | ZXLD1370EST16TCDKR |
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A Product Line of
Diodes Incorporated
ZXLD1370
Application Information (cont.)
MOSFET Selection
The ZXLD1370 requires an external NMOS FET as the main power switch with a voltage rating at least 15% higher than the maximum circuit
voltage to ensure safe operation during the overshoot and ringing of the switch node. The current rating is recommended to be at least 10%
higher than the average transistor current. The power rating is then verified by calculating the resistive and switching power losses.
P = P RESISTIVE + P SWITCHING
Resistive Power Losses
The resistive power losses are calculated using the RMS transistor current and the MOSFET on-resistance.
Calculate the current for the different topologies as follows:
Buck Mode
I MOSFET ? MAX = D MAX x I LED
Boost / Buck-Boost Mode
I MOSFET ? MAX =
D MAX
1 ? D MAX
× i LED
The approximate RMS current in the MOSFET will be:
Buck Mode
I MOSFET
? RMS
= I LED D
Boost / Buck-Boost Mode
I MOSFET
? RMS
=
D
1 ? D
x I LED
The resistive power dissipation of the MOSFET is:
P RESISTIVE = I MOSFET ? RMS 2 x R DS ? ON
Switching Power Losses
Calculating the switching MOSFET's switching loss depends on many factors that influence both turn-on and turn-off. Using a first order rough
approximation, the switching power dissipation of the MOSFET is:
P SWITCHING =
C RSS x V 2 IN x f sw x I LOAD
I GATE
where
C RSS is the MOSFET's reverse-transfer capacitance (a data sheet parameter),
f SW is the switching frequency,
I GATE is the MOSFET gate-driver's sink/source current at the MOSFET's turn-on threshold.
ZXLD1370
Document number: DS32165 Rev. 5 - 2
22 of 39
www.diodes.com
September 2012
? Diodes Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ZXLD1371 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER-CONTROLLER |
| ZXLD1371EST16TC | 功能描述:MOSFET LED Controller TSSOP TSSOP-16EP T&R 2.5K RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| ZXLD1371QESTTC | 功能描述:MOSFET LED Controller TSSOP TSSOP-16EP T&R 2.5K RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| ZXLD1374 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST |
| ZXLD1374_11 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST |
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