8682l Ic Datasheet !new! | Direct Link |

(also referred to as ) is a specialized power management integrated circuit (IC) primarily utilized as a battery charger controller

in laptop motherboards and portable electronics. Manufactured by O2Micro International

, it is a critical component for managing the charging cycle of lithium-ion batteries. WIT Computers Core Technical Profile

The datasheet for the 8682L outlines a device designed for high-efficiency power regulation within a compact footprint. Package Type: Typically housed in a (Quad Flat No-lead) package, measuring approximately

mm, which is ideal for the space-constrained environments of modern laptops. Primary Function: It acts as a DC/DC converter

and SMPS (Switch Mode Power Supply) driver specifically optimized for battery charging. Key Responsibilities: Voltage Regulation:

Ensures stable power delivery to the battery and system components. Safety Interlocks:

Manages logic for safety protocols to prevent overcharging or thermal issues. Noise Immunity:

Includes features to resist electrical noise, maintaining precision in industrial or high-interference environments. AliExpress Applications and Industry Use While most commonly found in laptop motherboards

(specifically brands like Apple and Acer), the chip's robustness makes it suitable for various embedded systems. WIT Computers

Serves as a vital link in the power sequence, managing how the device switches between AC adapter power and battery power. Industrial Controllers:

Used in complex automation and industrial devices due to its high reliability and ability to handle power fluctuations.

Developers may integrate the OZ8682L into custom IoT hardware that requires sophisticated battery management. AliExpress Finding Documentation 8682l ic datasheet

Detailed electrical characteristics, such as pinout configurations and thermal performance data, are found in the official O2Micro datasheet

. When searching for replacements, ensure you match the exact marking "8682L" to avoid incompatibility with other similarly numbered chips like the (an operational amplifier) or (a magnitude comparator). AliExpress typical application circuit to help with a repair or a new design?

(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 (also referred to as ) is a specialized

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 (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. Initialization sequence: power-up

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.

5. Typical Applications

• Post-regulation for switching power supplies (clean up ripple).
• Battery-powered devices (if Iq is acceptable).
• LED drivers (low-current strings).
• MCU power (Arduino, ESP8266, PIC – if current <200mA).
• Audio preamps & op-amp supplies.

Likely 8682L Pinout (SOT-23-5 Variant)

Based on reverse-engineered circuits from devices like Bluetooth headsets, small power banks, and LED drivers, the 8682L in a 5-pin SOT-23 package typically follows this pinout:

| Pin No. | Name | Description | |---------|------------|------------------------------------| | 1 | VIN | Input voltage (2.5V – 6.0V) | | 2 | GND | Ground | | 3 | EN (or NC) | Enable pin (active high, tie to VIN if unused) | | 4 | NC / ADJ | No connect or feedback/adjust | | 5 | VOUT | Regulated output voltage |

For SOT-89 package (3-pin):
1 – VIN, 2 – GND, 3 – VOUT (fixed voltage). No enable pin.

For SOT-23-6 variant (sometimes labeled 8682L):
Pins 1-6: VIN, GND, EN, BP (bypass), FB (feedback), VOUT.

⚠️ Warning: Without the original datasheet, these pinouts are derived from common LDO topologies. Always test continuity and voltage behavior on a known working board or use a component tester.

Example 1: Bluetooth Earbud Charging Case

The 8682L is ideal for a 300mAh to 500mAh battery in a small form factor. Design parameters:

• I_CHG = 200mA → R_PROG = 5kΩ (use 5.1k standard)
• LED indicators on the case exterior
• No external power transistor needed

Applications Where the 8682L is Found

Searching for the 8682L in real-world devices provides clues to its function. Common applications include:

1. Portable Bluetooth Speakers – Powers the Bluetooth audio chip from a lithium battery.
2. USB Power Banks – Regulates 5V USB down to 3.3V for the microcontroller.
3. MP3 Player Modules – Provides stable voltage for audio DAC and headphone amp.
4. Wireless Earbud Charging Cases – Low quiescent current preserves battery life.
5. IoT Sensors – Battery-powered temperature/humidity sensors use the 8682L for 3.3V rail.
6. LED Drivers – Constant current configuration with external sense resistor.

Example 2: Solar-Powered Sensor Node

With a 5V solar panel (or 6V panel with LDO regulation to 5V), the 8682L can charge a 18650 cell at 100mA:

• I_CHG = 100mA → R_PROG = 10kΩ
• Add a Schottky diode at input to prevent reverse current from battery to panel at night

Firmware integration

• Initialization sequence: power-up, reset, configure clocks and PLL, load radio registers (frequency, data rate, power), enable interrupts.
• Use SPI transactions to read/write configuration registers and FIFO buffers.
• Implement state machine: sleep → wake → RX/TX → process → sleep.
• Handle interrupts for packet received, TX done, CRC error, and low-battery events.
• Calibrate RSSI and ADC readings on first power-up if required.