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。

產品特性

            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

            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)



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