ROHM Product Detail

BD9G341AEFJ
MOSFET内置 1ch降压开关稳压器

BD9G341AEFJ是内置对应76V高输入电压的功率MOSFET的降压1ch开关稳压器。内置80V耐压3.5A额定、导通电阻150mΩ的功率MOSFET。还通过电流模式控制方式，实现了高速瞬态响应和简便的相位补偿设定。频率在50kHz ～ 750kHz的范围内可变，内置低电压误动作防止电路、过电流保护电路等保护功能。此外，可通过高精度的EN引脚阈值进行低电压锁定，及使用外接电阻设定滞后。

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主要规格

 
型号 | BD9G341AEFJ-E2
Status | 推荐品
封装 | HTSOP-J8
包装形态 | Taping
包装数量 | 2500
最小独立包装数量 | 2500
RoHS | Yes

特性：

ch

1

Integrated FET / Controller

Integrated FET

Topology

Buck

Synchronous / Nonsynchronous

Non-synchronous

Vin1(Min.)[V]

12

Vin1(Max.)[V]

76

Vout1(Min.)[V]

1

Vout1(Max.)[V]

76

Iout1(Max.)[A]

3

SW frequency setting (Max.)[MHz]

0.75

EN

Yes

Operating Temperature (Min.)[°C]

-40

Operating Temperature (Max.)[°C]

85

Package Size [mm]

4.9x6.0 (t=1.0)

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特点：

  • Wide input voltage range from 12V to 76V.
  • Integrated 80V/3.5A/150mΩ NchFET.
  • Current mode.
  • Variable frequency from 50kHz to 750kHz.
  • Accurate reference voltage (1.0V ±1.5%).
  • Precision EN threshold (±3%).
  • Soft-start function
  • 0µA Standby current
  • Over Current Protection (OCP), Under Voltage Lockout (UVLO), Thermal-Shutdown TSD), Over Voltage Protection (OVP) Thermally enhanced HTSOP-J8 package

参考设计 / 应用评估套件

 
    • Evaluation Board - BD9G341AEFJ-EVK-101

    • This EVK is using not BD9G341AEFJ-LB, but BD9G341AEFJ. This evaluation board has been developed for ROHM’s non-synchronous buck DC/DC converter customers evaluating BD9G341AEFJ. While the BD9G341AEFJ accepts a power supply input range of 12V to 76V, and generates output voltages from 1V to Vcc, this evaluation board is setup for the same input voltage range and a fixed output of 5V can be produced.

    • User's Guide Layout (CAD Data)
    • Reference Design - REF68008
    • Industrial 16-Cell BMS Evaluation Platform with ML5238GA AFE and ML63Q8057 MCU

    • This Battery Management System (BMS) platform provides detailed specifications for an industrial-grade lithium-ion battery monitoring and protection solution. It is designed to support reliable operation in demanding industrial energy storage and power backup applications.

      The BMS evaluation platform serves as a reference design for assessing a multi-cell battery monitoring system utilizing ROHM’s ML5238 16-cell Analog Front End (AFE) in combination with the LAPIS ML63Q8057 microcontroller. The system enables accurate cell voltage measurement, current sensing, temperature monitoring, cell balancing, state-of-charge estimation, and fault detection, forming a complete solution for industrial battery packs.

      This evaluation kit integrates the core functional blocks required for BMS operation, including the monitoring circuitry, control firmware, sensing interfaces, non-volatile memory, and PC communication interface. The design is optimized for robustness, measurement accuracy, and long-term reliability, making it suitable for industrial energy storage systems, uninterruptible power supplies (UPS), e-mobility auxiliary systems, and stationary battery applications.

      The reference design includes comprehensive technical resources such as firmware architecture documentation, communication protocol definitions, memory maps, and configuration guidelines. It features a fully functional BMS firmware implementation optimized for industrial environments, supporting protection mechanisms, data logging, diagnostics, and seamless interfacing with a host PC or supervisory controller.

      Users are encouraged to explore the advanced monitoring, protection, and diagnostic capabilities of this BMS evaluation platform and consider its integration or customization for their industrial battery management and energy storage development projects.

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