説明

EE-Sim^®を使って設計とシミュレーションを行う:

The MAX77960/MAX77961 are high-performance wide-input 3A (MAX77960)/6A (MAX77961) buck-boost chargers with Smart Power Selector™ and operate as a reverse buck converter without an additional inductor, allowing the ICs to power USB on-the-go (OTG) accessories. The devices integrate low-loss power switches and provide high efficiency, low heat, and fast battery charging in a small solution size. The reverse buck has true load disconnect and is protected by an adjustable output current limit. The devices are highly flexible and programmable through I²C configuration or autonomously through resistor configuration.

The battery charger includes the Smart Power Selector to accommodate a wide range of battery sizes and system loads. The Smart Power Selector allows the system to start up smoothly when an input source is available even when the battery is deeply discharged (dead battery) or missing. For battery safety/authentication reasons, the ICs can be configured to keep charging disabled, and allow the DC-DC to switch and regulate the SYS voltage. The system processor can later enable charging using I²C commands as appropriate. Alternatively, the ICs can be configured to automatically start charging.

主な特長

• 3.5V to 25.4V Input Operating Range, 30V_DC Withstand
• 97% Peak Efficiency for 2S Battery at 9V_IN/7.4V_OUT/1.5A_OUT
• 97% Peak Efficiency for 3S Battery at 15V_IN/12.6V_OUT/2A_OUT
• MAX77960
  • 100mA to 3.15A Programmable Input Current Limit
  • 100mA to 3A Programmable Constant Current Charge
• MAX77961
  • 100mA to 6.3A Programmable Input Current Limit
  • 100mA to 6A Programmable Constant Current Charge​
• Remote Differential Voltage Sensing
• 600kHz Switching Frequency
• System Instant On with Smart Power Selector Power Path
• ​Charge Safety Timer
• Die Temperature Regulation with Thermal Foldback Loop
• Input Power Management with Adaptive Input Current Limit (AICL) and Input Voltage Regulation
• 10mΩ BATT to SYS Switch, Up to 10A Overcurrent Threshold
• ​Reverse Buck Mode 5.1V/3A to Support USB OTG
• JEITA Compliant with NTC Thermistor Monitor
• I²C or Resistor Programmable
• 4mm x 4mm, 30-Lead FC2QFN

アプリケーション/用途

• USB Type-C給電広入力充電アプリケーション
• 2および3セルバッテリ動作機器
• スマートフォン、タブレット、および2-in-1ラップトップ
• 医療機器、ヘルスおよびフィットネスモニタ
• デジタルスチル、ビデオ、およびアクションカメラ
• ハンドヘルドコンピュータおよび端末
• ハンドヘルド無線
• 電動工具
• ドローン
• バッテリバックアップ
• ワイヤレススピーカー