DW01A Lithium Battery Protection IC SOT23-6

DW01A Lithium Battery Protection IC in the SOT23-6 package is a highly integrated, essential component for safeguarding single-cell lithium-ion and lithium-polymer batteries. This compact chip actively monitors the battery voltage and current, immediately disconnecting the load or charger when it detects critical faults like overcharge, over-discharge, or over-current conditions. It works seamlessly with an external dual N-channel MOSFET (often a 8205A) to form a complete protection circuit module (PCM). By implementing the DW01A, you dramatically extend the battery’s service life, ensure operational safety, and prevent cell damage caused by improper usage, making it the foundational component for nearly every reliable single-cell battery application.

Key Features:

• Single-Cell Protection: Specifically designed to manage and protect one cell (Li-ion or Li-Po) battery packs.
• Comprehensive Fault Detection: Monitors for Overcharge Voltage (OVC), Over-Discharge Voltage (UVC), and Over-Current Discharge (OCC) conditions.
• High Accuracy: Offers precise voltage thresholds, ensuring reliable and timely protection response.
• Low Power Consumption: Draws minimal current in normal operating mode, which helps preserve the battery’s charge when the device is idle.
• Small Footprint: Utilizes the space-saving SOT23-6 surface mount package, ideal for miniature and portable electronic devices.

Technical Specifications:

• Operating Voltage Range: 3.6 V to 6.0 V
• Overcharge Detection Voltage (V_OC): ≈ 4.25 V ± 0.05 V
• Over-Discharge Detection Voltage (V_UD): ≈ 2.40 V ± 0.10 V
• Discharge Over-Current Threshold (V_IO): 150 mV ± 30 mV (Detects current via external MOSFET R_DS(ON))
• Quiescent Current (Normal): ≈ 3 μA (Max)
• Temperature Range: -40°C to +85°C

Mechanical Specifications:

• Package Type: SOT23-6 (Small Outline Transistor, 6 pins)
• Mounting Style: Surface Mount Device (SMD)
• Body Material: Molded Plastic

Dimensions:

• Body Length: ≈ 2.9 mm
• Body Width: ≈ 1.6 mm
• Body Height: ≈ 1.1 mm
• Weight: < 0.1 g

Pinout and Wiring:

• Pin 1 (OC): Overcharge Control Output (Connects to Charge MOSFET Gate).
• Pin 2 (OD): Over-Discharge Control Output (Connects to Discharge MOSFET Gate).
• Pin 3 (CS): Current Sense Input (Connects to external MOSFET Source/Ground connection).
• Pin 4 (V_SS): Ground Terminal (0V reference).
• Pin 5 (V_DD): Positive Battery Terminal (Input Voltage).
• Pin 6 (NC): No Connection (Reserved).

Datasheet Reference:

• Download DW01A Battery Protection IC Datasheet

Commonly Used in:

• Battery Protection Modules (PCM): The core component of cheap, reliable protection circuits.
• Li-Po/Li-ion Battery Packs: Integrated directly into the battery cell casing or connector board.
• USB Power Banks: Ensuring the safe charging and discharging of the internal cell.

Applications:

• Wearable Electronics: Providing essential safety in smartwatches and fitness trackers.
• Portable Audio Devices: Protecting cells in Bluetooth headphones and speakers.
• Vaping Devices: Used in safe, regulated mod systems to prevent over-discharge damage.

Equivalent Models:

• S-8261 Series: A widely used protection IC from Seiko, offering similar functionality.
• FS312: Another single-cell protection IC often found in budget modules.
• HT3582A: A similar battery protection IC offering overcharge and over-discharge protection for single-cell lithium-ion batteries.
• TP4056: Another battery management IC with integrated protection and charging functions.

Package Includes:

• 1 x DW01A Lithium Battery Protection IC SOT23-6