TI TIDA－01179 30W汽车前端电源参考设计

[导读] TI公司的TIDA-01179是30W汽车前端电源参考设计,包括了两个DC/DC转换器:第一个为降压-升压DC/DC转换器,满足ISO 7637-2和ISO16750-2标准;第二个是低成本紧凑

TI公司的TIDA-01179是30W汽车前端电源参考设计,包括了两个DC/DC转换器:第一个为降压-升压DC/DC转换器,满足ISO 7637-2和ISO16750-2标准;第二个是低成本紧凑的降压转换器,输出高达20W.系统还包括反向电池保护,电瞬变保护和EMI滤波器.参考设计能处理所有的电池所有情况,输入电压3- 36V DC,主要用在HEV/EV牵引逆变器,电子控制单元,电池前端电源和干式双离合器变速器.本文介绍了参考设计TIDA-01179主要特性,框图,HEV/EV牵引逆变器系统框图以及参考设计TIDA-01179电路图,材料清单和PCB设计图.

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.

参考设计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)

参考设计TIDA-01179应用:

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