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关键词:电源管理 LED驱动器 汽车照明 DC/DC转换器

时间:2018-06-08 09:29:29       作者:Infineon       来源:中电网

infineon公司的TLD5541-2QV是内置了保护特性和SPI接口的同步双路DC/DC控制器,提供模拟和数字(PWM)调光特性,开关频率在200kHz到700kHz,可以和外接时钟同步,LED正向电压2 V到55 V,IC电压4.5V-40V,电源电压4.5V-55V,SPI用来诊断和控制,各种条件下的最大效率高达96%,多种拓扑恒流(LED)和恒压调整.主要用在汽车中大功率LED驱动设计,汽车外照明如LED头灯,通用电流/电压控制DC/DC LED驱动器.本文介绍了TLD5541-2QV主要特性和产品指标,保护功能与诊断特性,框图和多种应用电路及相应材料清单,以及评估板TLD5541-2QV DEMO V1主要指标,电路图,材料清单和PCB元件布局图.

The TLD5541-2QV is a synchronous DUAL Channel DC/DC controller with built in protection features and SPIinterface. This concept is beneficial for driving high power LEDs with maximum system efficiency andminimum number of external components. The TLD5541-2QV offers both analog and digital (PWM)dimming.The switching frequency is adjustable in the range of 200 kHz to 700 kHz. It can be synchronized to an external clock source. A built in programable Spread Spectrum switching frequency modulation and theforced continuous current regulation mode improve the overall EMC behavior. Furthermore the current moderegulation scheme provides a stable regulation loop maintained by small external compensationcomponents. The adjustable soft start feature limits the current peak as well as voltage overshoot at start-up.The TLD5541-2QV is suitable for use in the harsh automotive environment.

TLD5541-2QV主要特性:

• Dual-Channel synchronous DC/DC Controller for HIGH POWER LED drivers
• Wide LED forward voltage Range (2 V up to 55 V)
• Wide VIN Range (IC 4.5 V to 40 V, Power 4.5 V to 55 V)
• Switching Frequency Range from 200 kHz to 700 kHz
• SPI for diagnostics and control
• Maximum Efficiency in every condition (up to 96%)
• Multitopology constant Current (LED) and Constant Voltage Regulation
• Drives Multiple Load with a single IC thanks to the Fast Output Discharge operation
• Limp Home Function (Fail Safe Mode)
• EMC optimized device: Features an auto Spread Spectrum
• LED current sense with dedicated monitor Output
• Advanced protection features for device and load
• Enhanced Dimming features: Analog and PWM dimming
• LED current accuracy +/- 3%
• Available in a small thermally enhanced PG-VQFN-48-31 package
• Automotive AEC Qualified

TLD5541-2QV产品指标:


TLD5541-2QV保护特性:

• Over load protection of external MOSFETs
• Shorted load, output overvoltage and overcurrent protection
• Input undervoltage protection
• Thermal shutdown of device with autorestart behavior
• Electrostatic discharge protection (ESD)

TLD5541-2QV诊断功能:

• Latched diagnostic information via SPI
• Open load detection in ON-state
• Device Overtemperature shutdown and Temperature Prewarning
• Smart monitoring and advanced functions provide ILED information

TLD5541-2QV降级模式功能:

• Limp Home activation via LHI pin

TLD5541-2QV应用:

• Especially designed for driving high power LEDs in automotive applications
• Automotive Exterior Lighting: full LED headlamp assemblies (Low Beam, High Beam, Matrix Beam, PixelLight)
• General purpose current/voltage controlled DC/DC LED driver

图1.TLD5541-2QV框图

图2.TLD5541-2QV应用电路:电流调整器

图3.TLD5541-2QV应用电路:增加其它元件改善EMC性能

图4.TLD5541-2QV应用电路:一路降压,一路升压电流调整器
TLD5541-2QV一路降压,一路升压电流调整器材料清单:



图5.TLD5541-2QV应用电路:平行通路升压电流调整器
TLD5541-2QV平行通路升压电流调整器材料清单:


图6.TLD5541-2QV应用电路:一路升压,一路降压电压调整器
TLD5541-2QV一路升压,一路降压电压调整器材料清单:


评估板TLD5541-2QV DEMO V1

Evaluation board for high power LED applications withthe TLD5541-2QV product.
The TLD5541-2 B2G DEMO is optimized to drive highpower LED applications.
The default configuration of the board is “Dual boostparallel voltage regulator” in multiphase topology thatallows to provide up to 80 W to the load with anefficiency above 94%.
The board can be configured to different topologieslike “Dual boost independent voltage regulators”,“Dual boost independent current regulators” and“Single boost independent voltage regulator plussingle boost independent current regulator”.
The board contains a 2x7 pin header to connect theTLD55xx MICROKIT (SP001802790) board. Thisinterface allows to control the TLD5541-2 B2G DEMOboard through a LabVIEW GUI installed on the PC.


图7.评估板TLD5541-2QV DEMO V1外形图
评估板TLD5541-2QV DEMO V1主要指标:



图8.评估板TLD5541-2QV DEMO V1电路图
评估板TLD5541-2QV DEMO V1材料清单:



图9.单路升压单独I/V调整器PCB元件布局图

图10.双路升压单独电压调整器PCB元件布局图

图11.双路升压单独电流调整器PCB元件布局图
详情请见:
https://www.infineon.com/dgdl/Infineon-TLD5541-2QV-DS-v01_00-EN.pdf?fileId=5546d4625d5945ed015d8422aa7a5437
https://www.infineon.com/dgdl/Infineon-TLD5541-2_B2G_Demo-UM-v01_00-EN.pdf?fileId=5546d46262b31d2e0162cdb7fcfd4b9f
Infineon-TLD5541-2QV-DS-v01_00-EN.pdf
Infineon-TLD5541-2_B2G_Demo-UM-v01_00-EN.pdf

 

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