Conclusion: Summarize the importance of having the datasheet for design and repair.
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Exactly understand what each of the QFN-16 or similarly packaged pins does. Incorrectly wiring an SMBus or sensing pin can destroy the IC or the battery itself.
The (often referred to simply as 8681L ) is a highly integrated SMBus programmable battery charge controller primarily manufactured by O2Micro International Ltd . It is a critical component in portable computing systems, specifically designed to function as a smart battery charger (SBC). Core Functionality 8681l ic datasheet pdf hot download
): High-precision internal reference voltage (often around 0.6V or 1.2V) with a low drift tolerance of Environmental and Thermal Limits -40∘Cnegative 40 raised to the composed with power C +125∘Cpositive 125 raised to the composed with power C
Understanding related parts can help you build a complete picture and find alternatives. Some of them share similar functionality with the OZ8681L.
Shuts down the output stages if the internal die temperature exceeds approximately 150∘C150 raised to the composed with power C Conclusion: Summarize the importance of having the datasheet
| Pin | Name | Function | |-----|------|----------| | 1 | VAC | Power supply input (adapter voltage) | | 2 | IACP | Adapter current sense (positive) | | 3 | IACM | Adapter current sense (negative) | | 4 | ICHM | Battery charge current sense (negative) | | 5 | ICHP | Battery charge current sense (positive) | | 6 | VDDA | 5 V linear voltage output (for internal analog circuits) | | 7 | IAC | Adapter current detection output – high level when adapter current is normal | | 8 | COMP | Compensation pin (loop stability) | | 9 | ACAV | Adapter valid signal output – high when adapter is present | | 10 | SCL | SMBus clock line for EC / battery communication | | 11 | SDL | SMBus data line for EC / battery communication | | 12 | BST | Bootstrap pin for internal high‑side gate drive | | 13 | HDR | High‑side MOSFET gate control output | | 14 | LX | Switching node (connects to external inductor) | | 15 | VDDP | Power supply for internal analog circuits (lower gate drive supply) | | 16 | LDR | Low‑side MOSFET gate control output | | 17 | GND | Ground (note: QFN package may have a central ground pad) |
Lists the IC for replacement purposes, confirming its 40-pin usage in certain configurations or laptop models. Common Usage Tips
Includes Thermal Shutdown (TSD), Over-Voltage Protection (OVP), and Short-Circuit Protection (SCP). The (often referred to simply as 8681L )
| Variant / Component | Key Function | Common Use Case | Manufacturer (Examples) | | :--- | :--- | :--- | :--- | | | Smart Battery Charger IC | Laptop battery charging control | O2Micro | | Fenghua Capacitors | Aluminum Electrolytic Capacitor | General-purpose power filtering | Fenghua (HK) | | PS8601L | High-Speed Optocoupler | Isolated signal transmission | Renesas, NEC |
) ensure low output voltage ripple and stable transient response. Feedback Resistors (
The O2Micro OZ8681L is a highly integrated, SMBus-programmable smart battery charger controller, often used in portable computers. Packaged in a QFN16, the device features dual high-side current sensors designed to optimize charging by managing power between the system and the battery. Access the technical specifications and PDF at WIT Computers
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If you are working on modern power management modules, LED lighting drivers, or specialized DC-DC conversion circuits, you have likely encountered the . This compact yet powerful integrated circuit is a staple in high-efficiency electronics.