在快速發展的電子市場中，電源管理芯片（PMIC）扮演著至關重要的角色。它們不僅負責確保設備在各種條件下穩定運行，還致力于提高能效、延長電池壽命，并保護設備免受潛在損害。今天，我們要介紹的ET9668就是這樣一款集高效能、多功能于一體的電源管理解決方案。它不僅具備出色的電氣性能，還擁有緊湊的封裝設計，非常適合應用于智能手機、平板電腦、存儲設備以及便攜式媒體設備等眾多領域。
In the rapidly evolving electronics market, power management chips (PMIC) play a crucial role. They are not only responsible for ensuring stable operation of equipment in a variety of conditions, but also work to improve energy efficiency, extend battery life, and protect equipment from potential damage. Today, we will introduce ET9668 is such a high-efficiency, multi-functional power management solution. It not only has excellent electrical performance, but also has a compact package design, which is ideal for many applications such as smartphones, tablets, storage devices, and portable media devices.

一、ET9668的核心特性
ET9668是一款專為現代電子設備設計的電源管理芯片，它具備多種先進功能，能夠滿足不同應用場景的需求。以下是對其核心特性的詳細解讀：

智能過壓保護（OVLO）
ET9668內置了智能過壓保護機制，能夠在檢測到錯誤的輸入操作條件時，自動從其輸出引腳（OUT）斷開系統連接。這一功能對于保護后續電路免受過高電壓的損害至關重要。此外，ET9668的過壓閾值（OVLO）可以通過OVLO_SEL引腳進行選擇。當OVLO_SEL為高電平時，過壓點為21.9V；當OVLO_SEL接地時，過壓點則為12.4V。這種靈活的選擇性使得ET9668能夠適用于不同電壓范圍的輸入場景。
Intelligent Overvoltage Protection (OVLO)
The ET9668 has built-in intelligent overvoltage protection that automatically disconnects the system from its output pin (OUT) when an incorrect input operating condition is detected. This function is essential to protect subsequent circuits from excessive voltage damage. In addition, the overvoltage threshold (OVLO) of the ET9668 can be selected via the OVLO_SEL pin. When OVLO_SEL is at high voltage level, the overvoltage point is 21.9V. When the OVLO_SEL is grounded, the overvoltage point is 12.4V. This flexible selectivity enables the ET9668 to be used in input scenarios with different voltage ranges

寬輸入電壓范圍
ET9668的輸入電壓范圍非常廣泛，從2.8V到28V都能正常工作。這一特性使得它能夠在各種電源條件下穩定運行，無論是低電壓的便攜式設備還是高電壓的工業設備，都能輕松應對。
Wide input voltage range
The ET9668 has a wide range of input voltages, from 2.8V to 28V. This feature allows it to operate stably under a variety of power supply conditions, whether it is low-voltage portable equipment or high-voltage industrial equipment, which can be easily handled.

快速過壓保護響應時間
在檢測到過壓情況時，ET9668能夠在50納秒（MAX）內做出響應，迅速切斷輸出以保護電路。這種快速的響應時間對于防止電路損壞至關重要，特別是在瞬態電壓波動較大的應用場景中。
Fast response time for overvoltage protection
When an overvoltage situation is detected, the ET9668 is able to respond within 50 nanoseconds (MAX), quickly cutting off the output to protect the circuit. This fast response time is essential to prevent circuit damage, especially in applications where transient voltage fluctuations are large.

啟動去抖動時間
ET9668的啟動去抖動時間為15毫秒（TYP），這有助于確保在電源啟動過程中電路的穩定性。通過這一設計，ET9668能夠避免由于電源波動引起的誤操作，從而提高系統的可靠性。
Enable the dejitter time
The ET9668 has a startup dejitter time of 15 milliseconds (TYP), which helps ensure circuit stability during power startup. With this design, the ET9668 avoids misoperation due to power fluctuations, thereby improving system reliability.

內部熱關斷保護功能
為了防止芯片因過熱而損壞，ET9668內置了熱關斷保護功能。當芯片溫度超過安全范圍時，該功能會自動切斷輸出，以保護電路和后續設備免受損害。這一特性對于長時間工作在高負載條件下的設備尤為重要。
Internal heat off protection function
In order to prevent the chip from being damaged by overheating, the ET9668 has a built-in thermal shutdown protection function. When the chip temperature exceeds the safe range, the function automatically cuts off the output to protect the circuit and subsequent equipment from damage. This feature is particularly important for equipment that operates under high load conditions for long periods of time.

特殊OTG模式
ET9668還支持特殊的OTG（On-The-Go）模式，這使得它能夠在不同設備之間實現數據傳輸和充電功能。這一特性對于需要頻繁進行數據交換和充電的便攜式設備來說非常實用。
Special OTG mode
The ET9668 also supports a special OTG (On-The-Go) mode, which enables data transfer and charging between different devices. This feature is useful for portable devices that require frequent data exchange and charging.

浪涌免疫能力
ET9668具備高達±200V的浪涌免疫能力，這意味著它能夠在遭受瞬時高壓沖擊時保持正常工作。這一特性對于在惡劣電氣環境中工作的設備來說至關重要，能夠顯著提高系統的穩定性和可靠性。
Surge immunity
The ET9668 has a surge immunity of up to ±200V, which means it can maintain normal operation when subjected to instantaneous high-pressure shocks. This feature is critical for equipment operating in harsh electrical environments and can significantly improve system stability and reliability.

VBUS主動放電路徑
ET9668在VBUS引腳處提供了主動放電路徑，這有助于在設備斷電時迅速釋放殘留電荷，從而確保設備的安全性和可靠性。
Active discharge path of the VBUS
The ET9668 provides an active discharge path at the VBUS pin, which helps to quickly release residual charges when the device is powered off, thus ensuring the safety and reliability of the device.

ESD保護
ET9668還具備出色的ESD（靜電放電）保護能力，其HBM（人體模型）靜電放電保護水平高達±4KV。這一特性使得ET9668能夠在各種靜電環境中保持正常工作，避免因靜電放電引起的電路損壞。
ESD protection
The ET9668 also has excellent ESD (electrostatic discharge) protection, with HBM (human body model) electrostatic discharge protection levels up to ±4KV. This feature enables the ET9668 to maintain normal operation in various electrostatic environments and avoid circuit damage caused by electrostatic discharge.

緊湊的WLCSP20封裝
ET9668采用了先進的WLCSP20（Wafer Level Chip Scale Packaging）封裝技術，這種封裝技術不僅具有體積小、重量輕的優點，還符合綠色環保要求。緊湊的封裝設計使得ET9668非常適合應用于空間有限的便攜式設備中。
Compact WLCSP20 package
ET9668 adopts advanced WLCSP20 (Wafer Level Chip Scale Packaging) packaging technology, which not only has the advantages of small size and light weight, but also meets the requirements of green environmental protection. The compact package design makes the ET9668 ideal for use in portable devices with limited space.

二、ET9668的應用領域
憑借其出色的性能和緊湊的封裝設計，ET9668在多個領域都有著廣泛的應用前景：

智能手機和平板電腦
隨著智能手機和平板電腦的普及，電源管理芯片的需求也在不斷增加。ET9668憑借其寬輸入電壓范圍、快速過壓保護響應時間和內部熱關斷保護功能，能夠確保這些設備在各種條件下穩定運行，同時延長電池壽命。

硬盤、存儲設備和固態硬盤
在數據存儲領域，電源管理芯片對于確保數據的完整性和安全性至關重要。ET9668的浪涌免疫能力和ESD保護能力使得它成為硬盤、存儲設備和固態硬盤等設備的理想選擇。

便攜式媒體設備、筆記本電腦和MID
這些設備通常需要長時間工作在高負載條件下，因此電源管理芯片的可靠性和穩定性尤為重要。ET9668的緊湊封裝設計和出色的熱管理性能使得它非常適合應用于這些設備中。

數碼單反相機
數碼單反相機通常需要處理大量的圖像數據，因此對電源管理芯片的要求較高。ET9668的寬輸入電壓范圍和快速過壓保護響應時間使得它能夠滿足數碼單反相機的電源管理需求。

GPS和導航設備
GPS和導航設備需要長時間工作，并且經常處于復雜多變的電氣環境中。ET9668的浪涌免疫能力和內部熱關斷保護功能使得它成為這些設備的理想電源管理解決方案。

工業手持設備和企業級設備
在工業領域，設備通常需要承受惡劣的電氣環境和高溫條件。ET9668的緊湊封裝設計、出色的熱管理性能和浪涌免疫能力使得它非常適合應用于工業手持設備和企業級設備中。

審核編輯 黃宇