TI TIDA－01179 30W汽車前端電源參考設計

TI公司的TIDA-01179是30W汽車前端電源參考設計,包括了兩個DC/DC 轉(zhuǎn)換器:第一個為降壓-升壓DC/DC轉(zhuǎn)換器,滿足ISO 7637-2和ISO16750-2標準;第二個是低成本緊湊的降壓轉(zhuǎn)換器,輸出高達20W.系統(tǒng)還包括反向電池保護,電瞬變保護和EMI濾波器.參考設計能處理所有的電池所有情況,輸入電壓3- 36V DC,主要用在HEV/EV牽引逆變器,電子控制單元,電池前端電源和干式雙離合器變速器.本文介紹了參考設計TIDA-01179主要特性,框圖,HEV/EV牽引逆變器系統(tǒng)框圖以及參考設計TIDA-01179電路圖,材料清單和PCB設計圖.

This reference design is an automotive front-endpower supply that able to supply a 30-W maximumoutput for the 12-V car battery. The first stage is abuck-boost DC/DC converter, which maintains a stableoutput voltage over the full DC range of the 12-Vbattery conditions specified in ISO 7637-2 and ISO16750-2 standards. Then a low-cost, compact buckconverter is connected to the buck-boost converterand enables up to a 20-W output. The system consistsof reverse battery protection, electrical transientprotections, and EMI filters. The EMI filter consists ofDM and CM respectively and is designed forcomplying conducted EMI standards per CISPR25.

This reference design is a wide input 30-W front-end power supply for a 12-V car battery in the HEV/EVtraction inverter system. It consists of two DC/DC converters. The first converter is a buckboostconverter, which handles a wide input range from the car battery and provides 15 V of constantoutput voltage at a 2-A output current. This 15-V rail can be used to power the system basis chip (SBC),the resolver, and the primary of the IGBT bias supply. Then a buck converter connected to the output ofbuck-boost converts the 15 V down to 5 V at 4.5 A. This 5 V can power the microcontrollers, ADconverters, safety diagnostic circuits, the primary sides of the current sensing, voltage sensing, and so on.

The TIDA-01179 is able to handle all battery conditions, which includes:
? The system maintains a constant output voltage over the full DC range of battery conditions specifiedin ISO 16750-2:
– Input VIN(min) down to 3.0 V simulating a severe cold cranking condition
– Input VIN(max) up to 28 V simulating the upper range of normal battery operation
? The system must clamp and filter high-voltage electrical fast transients and maintain operation throughthem:
– These pulses include clamped load dump (up to 38 V) and other transients outlined in ISO 7637-2:2004.
? The system must properly respond to a reverse battery polarity event and shut down appropriately.
? Filter design targets at the CISPR 25 automotive EMI standard for conducted emission suppression.
? The layout of the board must be done in such a way to minimize the footprint of the solution whilemaintaining high performance.

參考設計TIDA-01179主要特性:

? Wide-VIN Buck-Boost Converter During Very LowDips in Input Voltage of 3- to 36-V DC, 42-VTransient
? Low-Cost Buck Operates After the Buck-Boost With5-V and 4.5-A maximum output
? Reverse Battery Protection With Fast Shutdown
? Designed and Tested for Severe Battery ColdCrank Operations (ISO 16750-2 Level III)
? Designed and Tested for ISO 7637-2:2004 Pulse 1,2a, and 3a/b Severe Conditions (Level IV)
? Tested for CISPR25 Conducted EMI (Class 5)

參考設計TIDA-01179應用:

? HEV/EV Traction Inverter
? Dry Double Clutch Transmission
? Electronic Control Units
? Battery Front-End Power