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系統電源IC

With the increasing performance of automotive electronic devices, it is becoming essential to increase the current capability and the number of outputs of power supply ICs. To address these needs, Toshiba offers system power supply ICs with an integrated DC/DC converter. The latest addition to our portfolio of system power supply ICs, the TB9044FNG, is ideal for power supply applications for electronic power steering systems that require an extremely high level of safety.

系統電源IC(單路輸出)
系統電源IC(多路輸出)

TB9044FNG Overview

More and more safety-critical automotive systems, such as electric power steering (EPS) and braking, are required to satisfy ASIL D[Note1], the highest automotive safety integrity level prescribed in the ISO 26262 functional safety standards.

The new IC integrates various failure detection functions, such as high-voltage and low-voltage detection and overheat detection of power supply circuit, to monitor against the IC’s own failure, and a watchdog timer to monitor failure detection of the external microcomputer. An initial diagnosis circuit to detect latent faults in the failure detection circuits is also incorporated to secure higher functional safety.

Note1: ASIL: Automotive Safety Integrity Level

Low-voltage operation (VB: 2.7V~), 3ch Power Supply for Sensors
Safety mechanisms suitable for ASIL D systems

  • Buck-Boost Pre-Regulator
    (Min 2.7 V input, 6 V output, integrated drivers for buck mode,
    External Drivers for Boost Mode)
  • 5 V Linear Regulator
    (400mA, Integrated Driver)
  • 5 V Tracking Regulators
    (100mA × 3 ch, Integrated Driver)
  • Safety Mechanism
    • Low-voltage detection, High-voltage detection, Overcurrent detection, Thermal shutdown
    • Window watchdog timer
    • BIST for initial diagnosis
  • SPI I/F enables reading of internal status of safety mechanisms
  • Absolute Maximum Voltage
    40V (for load dump)
  • Recommended Operating Voltage
    2.7V to 18V
  • Operating Temperature
    Ta= -40 to 125°C
  • Package: 48pin HTSSOP

This is the block diagram of TB9044FNG System Power Supply IC.

高效DC/DC轉換器 + LDO多路電源IC TB9042FTG

SPI介面、各種系統監控功能、(DC/DC × 2,LDO × 3)嵌入式高效系統電源IC

HQFN52 package

  • DC/DC轉換器(開關頻率:370kHz)
    • DCDC1:6V(1.0A),效率大於80%
    • DCDC2:1.5V/1.2V(1.0A)輸出(可選)
  • 系列電源
    • LDO1:5V輸出(400mA)
    • LDO2:5V輸出(100mA)
  • 備用電源
    • VBU:5V/3.3V(10mA)(可選)
  • SPI通信
    • 故障通知
    • MCU診斷
    • 低壓檢測
    • 高壓檢測
  • 重置計時器
  • 上電復位(POR)
  • 監視計時器(WDT)
  • 工作溫度範圍: -40至125 ℃
  • 小尺寸電源封裝:HQFN52-P-0808-0.50

This is the block diagram of High-efficiency DC/DC converter + LDO multi power IC TB9042FTG.

產品陣容

系統電源IC(單路輸出)

產品型號 功能 輸出
電壓(V)
輸出
電流(mA)
功率
消耗
最大值(W)
備註 封裝 工作
電壓
TB9005FNG CPU電壓穩壓器
(带有WDT)
5 8 0.68
  • 低消耗電流:90µA(典型值)
  • WDT關閉功能
  • 重置檢測4.7V/4.2V(可選)
  • 需要外部電晶體
SSOP20 6至18V
TB9021FNG CPU電壓穩壓器
(带有WDT)
5 200 2.8
  • 低消耗電流:30µA(典型值)
  • WDT關閉功能
  • 重置檢測4.7V/4.2V(可選)
  • 集成輸出電晶體
TSSOP16 6至18V

*:研發中,WDT:監視計時器

系統電源IC(多路輸出)

Part Number Functions Output
Voltage Typ. (V)
Output
Current (mA)
Input
Voltage
Max (V)
Power
Dissipation
Max (W)
Remarks Package Supply
Voltage
(V)
Rel.
Level
TB9042FTG*

CPU voltage regulator
DC-DC converter & LDO
Watchdog timer
On-chip SPI

1.5/1.2
5
5
5/3.3

1000
400
100
10

40
(1 sec.)
5.5
  • DC/DC converter: 6V & Vreg1 output, SW frequency 370 kHz
  • 3 LDO regulators
  • Low voltage detection, POR, WDT
  • SPI interface (error infomation output, for MCU diagnosis)
HQFN52 7 to 20 AEC-Q100
Unde
consideration
TB9044FNG* CPU voltage regulator
DC-DC converter & LDO
Watchdog timer
On-chip SPI
5
5
5
5
400
100
100
100
40
(1 sec.)
3.84
  • DC-DC converter
  • Four low-dropout (LDO) regulators
  • Voltage monitor, POR, WDT
  • SPI (error information output)
  • 5-V series power supply (with a 400-mA driver)
  • 5-V tracking power supply (with three 100-mA driver channels)
HTSSOP48 2.7 to 18 AEC-Q100
Unde
consideration

*:研發中,WDT:監視計時器,POR:上電復位

* 本文中涉及到的系統和產品名稱可能是相關公司或組織的商標或注冊商標。

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