48V システム
The advantage? Driving larger loads with less current results in reduced losses and enhanced efficiency, which makes 48V systems a compelling solution for a wide variety of applications, including:
- 48 Volt Automotive: Allegro’s 48V automotive designed Power ICs, coupled with leading sensors, optimize mild hybrid powertrains and BEV loads to improve range and reduce CO2 emissions.
- 48 Volt Industrial: Allegro’s gate robust 100V Si-Process offers the right solutions for precise motor control and smooth operation in automation applications.
- 48 Volt Data Center: Allegro’s 48V dedicated/optimized fan and pump Gate Drive Units allow a simple and reliable upgrade from 12V systems to maximize efficiency and peak performance.
Beyond 12V: Why traditional systems will struggle with modern power demands
Traditional 12V systems, currently the mainstay of power delivery, are struggling to keep pace with the escalating power requirements of modern applications. The limitations of 12V systems become clear when considering factors like power loss and cable thickness. As power demands increase, so do the currents within a 12V system in a linear fashion (P = V*I). This results in higher power losses along any wiring from the supply source to the load (Ploss= I2 *R). Practically speaking, if you double the power demand of the system the current will also double, but the power losses will quadruple! These power losses manifest as unwanted heat and reduced system efficiency. Also, managing higher currents requires thicker and heavier cables which adds weight and cost to system designs.
You may question the decision to limit the voltage to 48V when the advantages of higher voltages are apparent. However, the primary factor behind this limit is the safety standards that must be adhered to. Organizations such as UL and NFPA designate voltages below 60V as Safety Extra Low Voltage (SELV), deeming them safe for human interaction with unshielded equipment.
Power = Voltage * Current
A 4x higher voltage allows 4x lower current to power equal loads.
With Voltage = Resistance * Current and
Powerloss = Current² * Resistance lower currents enable lower power losses.
Lower power losses mean higher efficiency and less heat to dissipate.
Thinner Wire can lead up to a ~65% weight reduction.
Harness High Efficiency and Peak Performance with our 48V Solutions
Allegro’s SG8 semiconductor process technology in production for many years now was developed with 48V automotive systems in mind supporting up to 100V operation. The process technology features transistors with 122V breakdown voltage, lower drain-to-source resistance (Rdson), in addition to handling negative transients and reverse polarity. With this advanced process, automotive quality and reliability pedigree and a breadth of products capable of supporting both 12 and 48V operation, our solutions are best suited to start your transition to designing 48V systems for optimal performance, efficiency, and cost.
Allegro offers a broad array of sensor and power IC products ready for use in the design of 48V systems across a myriad of automotive, industrial, clean energy and data center applications.
48V Power IC and Sensor Product Portfolio
| 製品 | 説明 | |
|---|---|---|
| AMT49100 | 80V 車載用 3 相 MOSFET ドライバーおよび 3 LS 電流検知アンプ | |
| AMT49101 | 80V 車載用 3 相 MOSFET ドライバーおよび 2 LS 電流検知アンプ、マイクロプロセッサ用リニア レギュレーター | |
| AMT49502 | 80V ハーフ ブリッジ MOSFET ゲート ドライバーおよび単一の LS 電流検知アンプ | |
| A89500 | 分散 EPS/ ブレーキ システム用 100V ハーフ ブリッジ、超小型パッケージ | |
| A89503 | 直列接続負荷用のハーフ ブリッジ ゲート ドライバーおよび単一の LS 電流検知アンプ | |
| A89103 | ソリッド ステート 3 相モーター相アイソレーター、2 つの追加のチャネル (逆バッテリー切断用) |
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