TI PMP20249双路汽车12.5W USB充电器参考设计
ti公司的pmp20249是emi优化的双路汽车12.5w usb充电器参考设计,采用lms3635和lms3655稳压器以及tps2549 usb开关,具有cispr 25 class 4设计额定值;输入电压从6vin到18vin,2.5a时输出电压5v,主要用在汽车usb充电系统和汽车娱乐系统.本文介绍了参考设计pmp20249主要特性和指标,框图,电路图,材料清单和pcb设计图.
pmp20249 is an emi-optimized design for dual-automotive usb charger system using the lms3635 andlms3655 regulators (400-khz fully-integrated, synchronous buck for automotive applications) and thetps2549 usb switch (tps2549-q1 automotive usb charging port controller with integrated power switchand cable compensation). the design accepts an input voltage range of 6 vin to 18 vin and regulates twooutputs of 5 v at 2.5 a for dual-usb ports. this highly efficient design features an inexpensive solution and small-size customized for an automotive usb charger application. a four-layer pcb was used for thisdesign.
the design is divided into four major blocks:
• front-end protection: front-end protection against positive and negative pulses (iso7630 pulse 1, 2a,3a/b) through tvs.
• emi filter: differential filter for conducted emi suppression.
• low-emi front-end dc-dc converters: lms3655-q1 and lms3635-q1 are switching, synchronous5.5-a and 3.5-a buck regulators, and in this design the devices are used as front-end dc-dcconverters. these 400-khz parts are automotive optimized and have low emi. the device comes in anautomotive-qualified hotrod™ qfn package with wettable flanks, which reduces parasitic inductanceand resistance while increasing efficiency, minimizing switch node ringing, and dramatically loweringemi. the spread spectrum feature is a factory option which further reduces emi. this featureeliminates peak emissions at specific frequencies by spreading emissions across a wider range of frequencies.
• downstream usb charging-port controller and power switch: tps2549-q1 maintains 5 v at the usbport during heavy charging currents.
参考设计pmp20249主要特性:
• wide-vin front-end power supply for usbcharger system
• off-battery operation with positive and negativeovervoltage protection
• passed cispr 25 class 4 conducted emi test
• switching frequency: outside am band (400 khz)for all converters
• all aec-q100-qualified devices
• supports 6-v to 18-v wide-vin range
参考设计pmp20249应用:
• automotive usb charger system
• automotive infotainment system
图1.参考设计pmp20249外形图
参考设计pmp20249主要指标:
图2.参考设计pmp20249框图
图3.参考设计pmp20249电路图
参考设计pmp20249材料清单:
图4.参考设计pmp20249 pcb设计图(1)
图5.参考设计pmp20249 pcb设计图(2)
图6.参考设计pmp20249 pcb设计图(3)
图7.参考设计pmp20249 pcb设计图(4)
图8.参考设计pmp20249 pcb设计图(5)
图9.参考设计pmp20249 pcb设计图(6)
图10.参考设计pmp20249 pcb设计图(7)
图11.参考设计pmp20249 pcb设计图(8)
图12.参考设计pmp20249 pcb设计图(9)
图13.参考设计pmp20249 pcb设计图(10)
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pmp20249 is an emi-optimized design for dual-automotive usb charger system using the lms3635 andlms3655 regulators (400-khz fully-integrated, synchronous buck for automotive applications) and thetps2549 usb switch (tps2549-q1 automotive usb charging port controller with integrated power switchand cable compensation). the design accepts an input voltage range of 6 vin to 18 vin and regulates twooutputs of 5 v at 2.5 a for dual-usb ports. this highly efficient design features an inexpensive solution and small-size customized for an automotive usb charger application. a four-layer pcb was used for thisdesign.
the design is divided into four major blocks:
• front-end protection: front-end protection against positive and negative pulses (iso7630 pulse 1, 2a,3a/b) through tvs.
• emi filter: differential filter for conducted emi suppression.
• low-emi front-end dc-dc converters: lms3655-q1 and lms3635-q1 are switching, synchronous5.5-a and 3.5-a buck regulators, and in this design the devices are used as front-end dc-dcconverters. these 400-khz parts are automotive optimized and have low emi. the device comes in anautomotive-qualified hotrod™ qfn package with wettable flanks, which reduces parasitic inductanceand resistance while increasing efficiency, minimizing switch node ringing, and dramatically loweringemi. the spread spectrum feature is a factory option which further reduces emi. this featureeliminates peak emissions at specific frequencies by spreading emissions across a wider range of frequencies.
• downstream usb charging-port controller and power switch: tps2549-q1 maintains 5 v at the usbport during heavy charging currents.
参考设计pmp20249主要特性:
• wide-vin front-end power supply for usbcharger system
• off-battery operation with positive and negativeovervoltage protection
• passed cispr 25 class 4 conducted emi test
• switching frequency: outside am band (400 khz)for all converters
• all aec-q100-qualified devices
• supports 6-v to 18-v wide-vin range
参考设计pmp20249应用:
• automotive usb charger system
• automotive infotainment system
图1.参考设计pmp20249外形图
参考设计pmp20249主要指标:
图2.参考设计pmp20249框图
图3.参考设计pmp20249电路图
参考设计pmp20249材料清单:
图4.参考设计pmp20249 pcb设计图(1)
图5.参考设计pmp20249 pcb设计图(2)
图6.参考设计pmp20249 pcb设计图(3)
图7.参考设计pmp20249 pcb设计图(4)
图8.参考设计pmp20249 pcb设计图(5)
图9.参考设计pmp20249 pcb设计图(6)
图10.参考设计pmp20249 pcb设计图(7)
图11.参考设计pmp20249 pcb设计图(8)
图12.参考设计pmp20249 pcb设计图(9)
图13.参考设计pmp20249 pcb设计图(10)
详解RS-422与RS-485串行接口标准
北京移动联手京港地铁实现了地铁16号线移动5G信号全线覆盖
1005802-1压电电缆应用及使用
区块链在生活中有哪一些应用
骁龙630和骁龙660对比，谁才是高通带给市场的神U？
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新型绿色电池及其市场前景
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西湖大学正在研发微米级精度三维精密制造技术
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SMT的基本知识简介
为什么晶闸管不能用门极负信号关断阳极电流，而GTO却可以？
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