Because "8682L" is likely a marking code:
(also marked as ) is an integrated circuit primarily used as a SMBus Level 2 Battery Charger
with Hybrid Power Boost capabilities. It is a specialized power management chip frequently found in laptop motherboards. Core Technical Specifications
According to technical documentation and merchant listings for the OZ8682 series Manufacturer O2Micro International
: SMBus-controlled battery charging controller that supports Hybrid Power Boost
, allowing the system to draw power from both the battery and the adapter simultaneously to handle peak loads. Package Type
(16-pin Quad Flat No-lead), which is optimized for thermal dissipation in high-frequency applications. Applications
: High-performance embedded systems and laptop power management where efficiency and multi-tasking signal processing are required. AliExpress Key Features from the Datasheet SMBus Interface
: Allows digital communication with the system host to manage charging parameters. Hybrid Power Boost
: Vital for modern laptops that require extra current during intensive tasks (gaming, rendering) beyond what the AC adapter alone can provide. Thermal Performance
: Designed for stability under load, featuring noise immunity and specialized clock recovery mechanisms in some variants. AliExpress Related & Confusable Components
When searching for "8682L," ensure you are not looking for these distinct parts: : A High-Speed JFET Operational Amplifier from Analog Devices
: A power-management IC (PMIC) for DSLR cameras with 6 DC-DC converters. : An 8-bit magnitude comparator from Texas Instruments Where to Find the IC
If you are repairing a laptop or prototyping, you can find the through various electronics components retailers like AliExpress , or specialized parts stores like
The 8682L IC, also known by its full part number OZ8682LN, is a high-performance SMBus Level 2 Battery Charger integrated circuit manufactured by O2Micro. It is widely used in laptop motherboards, particularly for power management and voltage regulation in models like the Apple MacBook Pro. Key Technical Specifications
According to the OZ8682 datasheet from O2Micro, the chip is designed for efficiency and speed in embedded applications.
Function: SMBus Level 2 Battery Charger with Hybrid Power Boost technology. Package Type: QFN-16 (16-pin Quad Flat No-lead). Operating Voltage: Typically operates at 3.3V.
Communication: Utilizes the SMBus (System Management Bus) protocol for smart battery charging.
Application: Primary use is as a charging controller in laptops and mobile communication devices. Typical Applications & Use Cases
The OZ8682L is a critical component for mobile devices that require intelligent power distribution:
Laptop Battery Charging: Found in motherboard power circuits for various laptop brands, notably appearing in the firmware documentation for MacBook Pro A1260 and A1286 models.
Hybrid Power Boost: This feature allows the system to draw power from both the AC adapter and the battery simultaneously during peak load periods.
Voltage Regulation: It manages the transition between power sources and ensures stable voltage delivery to the motherboard. Integration and Repair Considerations 8682l ic datasheet
When working with the 8682L IC for repairs or new designs, keep the following in mind:
Pinout Awareness: Technicians should carefully map the VDD and VSS pins to avoid electrical shorts during replacement.
Thermal Management: The QFN-16 package requires a PCB layout that allows for adequate heat dissipation.
Soldering: Because of its small surface-mount design, it is best soldered using a reflow oven or a hot air gun with a fine tip. Availability and Replacement
The IC is available through various electronic component retailers such as AliExpress, eBay, and specialized parts suppliers like Motherboard.lk. It is often sold as a "New Original" chipset for laptop repairs.
The fluorescent hum of the server room was the only thing keeping Elias sane at 3:00 AM. He was a firmware engineer for a company that specialized in "legacy support"—a polite industry term for scavenging the technological graveyards of the 1980s.
On his workbench sat a decommissioned guidance computer from a Cold War-era satellite. It was dead, a heavy brick of oxidized metal and beige PCBs. His job was to reverse-engineer its bootstrap sequence. But he was stuck.
He pointed his microscope at a tiny, black, eight-legged chip near the power regulator. The markings were faded, scratched away by decades of thermal cycling. All that remained was a faint laser-etch: 8682L.
Elias sighed, rubbed his eyes, and turned to his keyboard. He typed the string into the specialized component search engine: 8682L ic datasheet.
The search bar spun. No results found.
He tried variations. 8682L controller, 8682L military spec. Nothing. It was a ghost. A silicon phantom.
Frustrated, he dug into the deep web archives—the messy, unindexed forums where old ham radio operators and retired defense contractors traded secrets like baseball cards. After an hour of digging through broken links and password-protected FTP servers, he found a single text file.
It wasn't a proper PDF. It was a scanned image of a microfiche, poorly converted. The title block read: MIL-STD-8682L: Logic Controller Interface.
Elias downloaded the file, his heart beating slightly faster. This was it. He opened the datasheet.
It was ugly. The diagrams were hand-drawn schematics from 1974. The text was grainy. But as he scrolled, his engineering brain began to parse the logic tables.
Standard stuff. But then he reached the section labeled "FUNCTIONAL DESCRIPTION."
Usually, a datasheet was dry. Clinical. It told you voltage tolerances and timing diagrams. But the description for the 8682L was weird. It didn't describe a logic gate or a memory register.
It described a lock.
The 8682L is designed as a sequential failsafe. The output pin (8) remains low until a specific analog signature is detected on the input array.
Elias frowned. "Analog signature?" He looked at the board. Pin 8 was connected to the reset line of the main CPU. If this chip didn't output high, the computer wouldn't wake up. It was a giant, electronic padlock.
He read further down the sheet. There was a "Truth Table," but it made no mathematical sense. The inputs required to trigger the output weren't binary 1s or 0s. They were rhythmic patterns.
Input Sequence: 3ms High, 7ms Low, 2ms High... Because "8682L" is likely a marking code:
It wasn't data. It was a song.
Elias sat back. The datasheet wasn't just a manual; it was a deterrent. It was designed to look like a simple logic gate to anyone glancing at it, but the electrical characteristics revealed a chaotic oscillator hidden inside. It was a security chip, likely meant to prevent Soviet reverse-engineering during the Cold War. Without the specific "key" pulse train, the chip would ground the system forever.
He looked at the timing diagram again. It was a complex, jittery wave. He realized he would have to program his signal generator to mimic that exact, imperfect waveform—the rise and fall times, the specific millisecond jitter.
For three hours, he coded the waveform based on the grainy image in the datasheet. It felt like learning a dead language.
At 6:00 AM, with the sun beginning to bleed through the blinds, he connected his function generator to Pin 4 of the 8682L. He double-checked the voltage against the Absolute Maximum Ratings section of the sheet. He didn't want to fry the only known sample.
He pressed 'Enter' on his laptop.
The signal generator hummed. On the oscilloscope, a yellow line danced—a chaotic, jagged spike that matched the hand-drawn diagram on his second monitor.
Elias watched Pin 8.
For a second, nothing happened. The line on the scope stayed flat at 0V.
Then, with a click that sounded impossibly loud in the quiet room, the line jumped to 4.8V.
On the workbench, the beige box shuddered. A cooling fan spun up, wheezing dust into the air. A single red LED on the front panel blinked on. Then a green one.
Elias exhaled a breath he didn't know he was holding. The datasheet had lied about what the chip was called, and it had obfuscated its purpose, but the geometry of the electrons didn't lie.
He picked up his coffee, cold now, and toasted the screen. "Good morning, 8682L."
The ghost in the machine was awake.
(also referred to as ) is a highly integrated SMBus Level 2 Battery Charger controller manufactured by O2Micro International
. It is primarily designed for use as a Smart Battery Charger (SBC) in portable computer systems, providing multi-chemistry support and high-efficiency charging. O2Micro.com Key Specifications & Features Controller Type
: SMBus-programmable multi-chemistry battery charge controller with Hybrid Power Boost
: NMOS synchronous buck converter with fixed frequency, achieving efficiency greater than 95% Battery Voltage accuracy. Charging and Adapter Current accuracy. Programmability (via SMBus) Battery Voltage : 11-bit DAC setting ( Charge Current : 6-bit DAC setting ( Adapter Current : 6-bit DAC setting ( Battery Support : Supports various chemistries, including Li-Ion (1 to 4 cells) : Space-saving 16-pin QFN Functional Capabilities Hybrid Power Boost
: This feature allows the battery to provide power in parallel with the AC adapter during peak power demands, preventing system crashes when power needs exceed the adapter's capacity. Monitoring
: It provides outputs for valid adapter presence and real-time monitoring of adapter current and battery discharge current. Protection Mechanisms : Integrated safety features include: Battery over-voltage and over-current protection. Reverse connection protection. Embedded thermal shutdown. O2Micro.com Common Applications
The OZ8682L is frequently found in industrial settings and high-end portable devices where long-term reliability and reduced firmware optimization are critical. It has been documented for use in specific laptop models, such as the Apple Macbook Pro 17" (Model A1229) AliExpress Datasheet Resources
You can find further technical details or download the full document from sites like Electronics Datasheets O2Micro Product Guide Electronics Datasheets or a specific circuit diagram for this IC? AI responses may include mistakes. Learn more (also marked as ) is an integrated circuit
The 8682L (also known as the OZ8682LN) is a high-performance SMBus Battery Charger Controller manufactured by O2Micro. It is primarily designed for portable devices like laptops, tablets, and medical equipment that require precise power management.
Below is a structured technical report based on the product's core specifications and typical application use cases.
Technical Report: OZ8682LN (8682L) Battery Charger Controller 1. Product Overview
The OZ8682LN is an integrated circuit (IC) housed in a compact QFN-16 package. It serves as a synchronous buck battery charger controller. It is specifically engineered to manage the charging of Lithium-ion (Li-ion) and Lithium-polymer batteries using a high-efficiency switching regulator architecture. 2. Key Specifications Manufacturer: O2Micro Package Type: QFN-16 (4x4 mm)
Interface: SMBus (System Management Bus) for digital communication and control.
Charging Chemistry: Optimized for multi-cell Li-ion/Li-polymer configurations. Architecture: Synchronous buck (step-down) converter. 3. Functional Features
Precision Control: Provides highly accurate voltage and current regulation, essential for maximizing battery life and ensuring safety.
High Efficiency: The synchronous rectification minimizes power loss, reducing heat generation during high-current charging cycles.
Dynamic Power Management: It can automatically adjust the charging current based on the total power draw of the system, preventing the AC adapter from overloading. Safety Protections: Over-voltage and over-current protection.
Battery thermistor monitoring to prevent charging in extreme temperature conditions.
Reverse current protection to prevent battery discharge into the adapter. 4. Application and Design Integration
In real-world applications, such as smart home hubs, the OZ8682L is valued for its low-latency communication and ability to handle complex power requirements.
Component Placement: For stable performance, designers must strictly follow datasheet recommendations for capacitor placement near the input and output pins to minimize noise.
IoT Ready: Its ability to interface with other system components via SMBus makes it suitable for IoT devices that require remote battery status monitoring. 5. Summary for Engineers
The 8682L is a reliable choice for engineers seeking a compact, SMBus-controlled charging solution. It balances high integration with robust safety features, though it requires careful PCB layout (specifically regarding thermal dissipation and signal integrity for the SMBus lines) to achieve peak performance.
Searching for the 8682L in real-world devices provides clues to its function. Common applications include:
The 8682L employs a PNP pass transistor rather than a PMOS. This classic bipolar design offers inherent protection against reverse input voltages but comes with a higher quiescent current than modern CMOS LDOs. The internal block diagram reveals:
Assuming a fixed 3.3V output variant of the 8682L, the standard application circuit is:
+-------------------+
| |
Vin o---+---[C1]---+----+---- VIN (pin1)
| (1uF) | |
+----+--------+ |
| |
GND |
|
+----+-----------------+ |
| | | |
| EN (pin3) --+ | |
| | | |
| GND (pin2)-+-GND | |
| | |
| VOUT (pin5)--------+-o--- Vout (3.3V)
| | |
| +---[C2]---+ GND
| (1uF) |
+-----------------------------+---+
Component values:
Always consult the specific manufacturer's datasheet for guaranteed min/typical/max values.
To avoid oscillation or poor regulation, follow these PCB layout tips (based on general LDO best practices):