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東芝推出具有多路輸出以實現汽車功能安全的通用系統電源IC

December 10, 2019

Toshiba Electronic Devices & Storage Corporation

TB9045FNG

東芝電子元件及儲存裝置株式會社(東芝)推出通用系統電源積體電路(IC) TB9045FNG,該產品支援多路電源輸出及汽車應用的功能安全[1]。新推出的IC提供四個版本,輸出電壓範圍在1.1V到1.5V之間。量產定於本月啟動。

電動輔助轉向盤(EPS)和自動煞車系統等汽車安全控制組件,須滿足ISO 26262功能安全標準中規定的最高車輛安全完整性等級ASIL-D [2]

新款IC內建各種診斷功能,例如過高低電壓、過高熱及內部振盪器頻率異常等等,也能監視外部MCU的Watchdog timer(監視計時器)電路並判斷整體系統的異常狀態。這款IC還能自行檢查IC內部之硬體電路且診斷電路中的潛在故障,以確保更高的功能安全。

東芝亦能從外部電腦注入虛擬的異常狀態並模擬系統故障,將為客戶提供功能安全FMEDA [3]等文件服務,以支援硬體/軟體/文件之三個面向的安全設計。

產品特點

1.    內建降壓-升壓型DC-DC轉換器並產生6V輸出
一旦汽車空轉而外部負載減低時,低壓側工作電壓範圍可降低至2.7V(最小值)。

2.    內建降壓型DC-DC轉換器(電壓可選)
降壓-升壓型DC-DC轉換器產生的6V輸入電源可轉換為1.1V (TB9045FNG-110)、1.2V (TB9045FNG-120)、1.25V (TB9045FNG-125)或1.5V (TB9045FNG-150)電壓。根據微控制器(MCU)需求,將適當版本IC作為核心的外部電源。

3.    內建4個串聯電源[4]電路(4個輸出)
這款IC包含4個串聯電源電路,用於接收由DC-DC轉換器產生的6V輸入。其中一個為微控制器的具有5V恒定電壓(電流容量為400mA)的電路,其它3個為感測器等介面具有5V恒定電壓輸出(電流容量為100mA)電路。每個電路均可獨立控制其開關動作。

4.    內建各種監測電路,以實現功能安全
電池電源的低壓檢測電路
DC-DC轉換器的高壓檢測電路(6V)
用於DC-DC轉換器(1.1V/1.2V/1.25V/1.5V)和串聯電源(5V)的高/低壓檢測電路
過熱檢測電路
振盪器頻率監測電路
監測外部MCU的Watchdog timer(監視計時器)電路

5.    檢查IC內部之硬體電路且診斷電路中的潛在故障,以確保更高的功能安全

6.    可選式故障診斷操作
客戶能以兩種SPI [5]通訊輸入方式將診斷結果對外回報。第一種方式為將重設信號的輸出;第二種方式為向系統通知異常操作,使用者可選適合方式。 

產品規格

Part number

TB9045FNG-110/TB9045FNG-120/TB9045FNG-125/TB9045FNG-150

Output voltage

400mA current capacitance (single circuit): 5.0V±0.1V (typ.)

100mA current capacitance (3 circuits): 5.0V ±20mV (typ.)

800mA current capacitance (single circuit):

TB9045FNG-110: 1.1V (typ.)

TB9045FNG-120: 1.2V (typ.)

TB9045FNG-125: 1.25V (typ.)

TB9045FNG-150: 1.5V (typ.)

Output current capacitance

400mA (single circuit), 100mA (3 circuits), 800mA (single circuit)

Operation voltage range

2.7 to 18V

Failure detections

Low-voltage detection circuit for the battery power supply

High-voltage detection circuit for the DC-DC converter (6V)

High-voltage / Low-voltage detection circuits for series power supply (5V)

Over heat detection

Oscillation frequency monitoring circuit

Watchdog timer circuit for the external MCU

Power on reset

Power on reset time is adjustable by the external capacitor

Watchdog timer

Window control: Time is configured independently in high-speed detection and low-speed detection.

Watchdog control

Operation or stop mode is switched by the watchdog timer select pin (WS pin).

Operating temperature range

-40 to 125℃

Package

HTSSOP48-P-300-0.50(6.1mm×12.5mm×1.0mm)

Mass production

Scheduled for December 2019 (1 million pcs/year)

注釋:
[1]功能安全標準旨在最大程度地降低由系統故障引起的風險。ISO 26262認證規定企業用於汽車應用的電機和電子(E/E)系統的過程或產品需符合標準中指定的嚴格標準,並為協力廠商提供獨立的方法來評估潛在供應商的能力。
[2] ASIL:車輛安全完整性等級,ISO 26262功能安全標準中規定的最高車輛安全完整性等級。
[3] FMEDA:失效模式影響與診斷分析
[4] 串聯電源:直流電源電路,其中電壓控制元件串聯到負載。
[5] SPI:串列周邊介面 

For further information about the new products, please visit:

For more information about Toshiba’s Automotive System Power Supply ICs, please visit:

System Power Supply for Automotive

*Company names, product names, and service names may be trademarks of their respective companies.

Customer Inquiries

System Devices Marketing Dept.III

Tel: +81-3-3457-3440

Contact

台灣地區

台灣東芝電子零組件股份有限公司

TEL: +886-(0)2-25089988

Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.

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