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1、TI PMP15014 汽车信息娱乐电源系统参考设计 时间：2016-07-15 10:49:22 作者：TI 来源：中电网 TI 公司的 PMP15014 是汽车信息娱乐电源系统参考设计,采用一级功率系统满足高输入电 压的需求, 并提供不同负载的低压多个输出, 还提供瞬态和极性相反保护,工作频率 2.1MHz, 以避开 AM 频段, 具有优异的 EMI 性能.参考设备选用 LM53625-Q1/LM53635-Q1 同步降压 稳压器.本文介绍了 LM53625-Q1/LM53635-Q1 主要特性,功能框图,LM53635 通用应用电 路图和几种典型应用电路, 以及汽车信息娱乐电源系统 PM
2、P15014 主要特性,电路图,材料清 单和 PCB 设计图. The LM53625-Q1/LM53635-Q1 synchronous buck regulator is optimized for automotive applications, providing an output voltage of 5 V, 3.3 V, or an adjustable output. Advanced high-speed circuitry allows the LM53625-Q1/LM53635-Q1 to regulate from an input of 18 V to an ou
3、tput of 3.3 V at a fixed frequency of 2.1 MHz. Innovative architecture allows this device to regulate a 3.3-V output from an input voltage of only 3.55 V. All aspects of the LM53625-Q1/LM53635-Q1 are optimized for automotive and performance-driven industrial customers. An input voltage range up to 3
4、6 V, with transient tolerance up to 42 V, eases input surge protection design. The automotive-qualified Hotrod QFN package with wettable flanks reduces parasitic inductance and resistance while increasing efficiency, minimizing switch node ringing, and dramatically lowering electromagnetic interfere
5、nce (EMI). An open-drain reset output, with built-in filtering and delay, provides a true indication of system status. This feature negates the requirement for an additional supervisory component, saving cost and board space. Seamless transition between PWM and PFM modes and low quiescent current (o
6、nly 15 A for the 3.3 V option) ensure high efficiency and superior transient responses at all loads. AO-Electronics 傲壹电子 官网： 中文网： ALPS ADI IR JRC/NJR KEC OTAX Seoul Semiconductor TI Walsin Technology LM53625-Q1/LM53635-Q1 主要特性: AEC-Q100 Automotive Qualified: Device Temperature Grade 1: 40 to +125 Am
7、bient Operating Temperature Range Device HBM Classification Level 2 Device CDM Classification Level C6 40 to +150 Junction Temperature Range 15-A Quiescent Current at no Load (Typical) with 3.3-V Output 4 mm 5 mm, 0.5-mm Pitch VQFN Package WithWettable Flanks and 0.6-mm V INSpacing Low EMI and Switc
8、h NoiseSpread Spectrum Option External Frequency Synchronization RESET Output with Internal Filter and 3-ms Release Timer Pin-Selectable Forced PWM Mode Built-In Compensation, Soft Start, Current Limit, Thermal Shutdown, and UVLO 0.6-V Dropout at 3.5 A at 105 T A 1% Output Voltage Tolerance (40 to 1
9、25 T J ) Available With Fixed 5-V, 3.3-V or Adjustable Output 图 1.LM53625-Q1/LM53635-Q1 功能框图图 2.LM53635 通用应用电路图 图 3.LM53635 固定 5V/3.5A 输出电源电路图 图 4.LM53635 固定 3.3V/3.5A 输出电源电路图图 5.LM53635 6V 输出电源电路图 汽车信息娱乐电源系统PMP15014 This solution is designed to be an automotive off-battery front end power supply fo
10、r infotainment systems. It was created using a one stage power system meeting high voltage input needs and providing low voltage for multi output rails for different load needs. The system also provides transient and reverse polarity protection. The Wide Vin Buck stage is working at 2.1Mhz to avoid
11、AM band and has superior EMI performance with an differential EMI filter to support CISPER 25. 图 6.汽车信息娱乐电源系统 PMP15014 外形图 汽车信息娱乐电源系统PMP15014 主要特性:Wide Vin 2.1MHz Integrated , Low Iq Buck Converter Boost for 5V CAN supply Transient and Reverse Polarity Protection and EMI filter added The system disc
12、onnet the second stage power and keep 3.3V sustained when Input votlage lower than 4.5V 图 7.汽车信息娱乐电源系统 PMP15014 电路图 汽车信息娱乐电源系统 PMP15014 材料清单:图 8.PMP15014 PCB 设计图(1) 图 9.PMP15014 PCB 设计图(2)图 10.PMP15014 PCB 设计图(3) 图 11.PMP15014 PCB 设计图(4) 图 12.PMP15014 PCB 设计图(5) 图 13.PMP15014 PCB 设计图(6) 图 14.PMP15014 PCB 设计图(7)图 15.PMP15014 PCB 设计图(8) 图 16.PMP15014 PCB 设计图(9)
