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Specifications
SKU: 12532388
Below is the parameter table and instructions for the IP6818 chip, typically used as a dual-cell lithium-ion battery charger and protection IC.
IP6818 Parameter Table
| Parameter | Symbol | Min | Typical | Max | Unit | Description |
|---|---|---|---|---|---|---|
| Input Voltage | VIN | 4.75 | - | 5.5 | V | Operating input voltage range |
| Charging Current | ICHG | 0 | 2000 | 3000 | mA | Maximum charging current |
| Pre-charge Current | IPRG | 0 | 250 | 500 | mA | Pre-charge current |
| Termination Current | ITERM | 0 | 200 | 500 | mA | Charge termination current |
| Battery Voltage | VBATT | 6.0 | - | 8.4 | V | Battery voltage range |
| Thermal Regulation | TREG | - | 120 | 140 | °C | Temperature at which thermal regulation starts |
| Standby Current | ISTBY | 0 | 50 | 100 | μA | Standby current |
| Operating Temperature | TOPR | -40 | - | 85 | °C | Operating temperature range |
| Storage Temperature | TSTG | -40 | - | 85 | °C | Storage temperature range |
IP6818 Instructions
Pin Configuration:
- VIN: Input power supply pin.
- BAT: Battery positive terminal.
- GND: Ground reference.
- EN: Enable pin (high to enable, low to disable).
- PG: Power good output (indicates charging status).
- TSD: Thermal shutdown pin (high to enable thermal shutdown).
Basic Operation:
- Connect the VIN pin to the power source (4.75V to 5.5V).
- Connect the BAT pin to the positive terminal of the battery.
- Ensure the GND pin is connected to the ground of both the power source and the battery.
- Set the EN pin high to enable the charger.
- Monitor the PG pin to determine if the charger is operating correctly.
Charging Process:
- Pre-charge Phase: If the battery voltage is below the pre-charge threshold, the charger will enter the pre-charge phase with a lower current (IPRG).
- Constant Current Phase: Once the battery voltage reaches the pre-charge threshold, the charger will switch to constant current mode (ICHG).
- Constant Voltage Phase: When the battery voltage reaches the target voltage (8.4V for a typical dual-cell battery), the charger will switch to constant voltage mode, reducing the charging current.
- Termination: Charging will terminate when the current drops below the termination current (ITERM).
Thermal Regulation:
- The charger will reduce the charging current if the temperature exceeds the thermal regulation threshold (120°C) to prevent overheating.
Protection Features:
- Overvoltage Protection: Protects against input voltages exceeding 5.5V.
- Overcurrent Protection: Limits the maximum charging current to prevent overcurrent conditions.
- Overtemperature Protection: Shuts down the charger if the temperature exceeds 140°C.
- Short-Circuit Protection: Protects against short circuits on the BAT pin.
Standby Mode:
- Set the EN pin low to put the charger into standby mode, reducing the power consumption to the standby current (ISTBY).
Storage and Handling:
- Store the IC in a dry, cool environment within the specified storage temperature range (-40°C to 85°C).
- Handle the IC with care to avoid static discharge and physical damage.
By following these instructions, you can effectively use the IP6818 for managing the charging and protection of dual-cell lithium-ion batteries.
(For reference only)Inquiry - IP6818
