1. Specifications
Unless otherwise specified, all parameters are measured at room temperature and referenced to the GND pin as the zero potential
| Symbol | Features | Condition | Unit | Min. | Typ. | Max. |
| System Parameters | ||||||
| VIN | Input Voltage Range | V | 4.5 | 5 | 5.5 | |
| Vbat | Battery Voltage | V | 2.95 | 4.4 | ||
| Charging Parameters | ||||||
| VIN Power Loss Monitoring | VIN from low to high | Vin>BAT | mV | 250 | ||
| VIN from high to low | Vin>BAT | mV | 50 | |||
| Vfloat | Float Threshold Voltage | V | 4.158 | 4.20 | 4.242 | |
| Ichg | Charging Current | VIN=4.75-5.25V | A | 0.8 | ||
| VTRKL | Trickle to Constant Current Transition | VBAT from low to high | V | 2.8 | ||
| VTRHYS | Trickle Charge Hysteresis Voltage | mV | 100 | |||
| VRECHG | Recharging Threshold Voltage | V | 4.1 | |||
| Discharge Parameters | ||||||
| Vo | Boost System Output Voltage | V | 4.95 | 5.1 | 5.25 | |
| Iout | Output Current | BAT=3.6V Vout>4.8V |
A | 0.8 | ||
| VOVP | Output Overvoltage Protection | V | 5.8 | |||
| VOVP_DIS | V | 5.4 | ||||
| VUVLO | Boost Undervoltage Protection | BAT from high to low | V | 2.95 | ||
| VUVLO_R | Boost Undervoltage Recovery | BAT from low to high | V | 3.20 | ||
| IBAT1 | Vout=5.5V，No switching | mA | 0.2 | |||
| IBAT2 | Vout=4.5V，switching | mA | 1 | |||
| Iauto_off | Automatic Shutdown Load Current | BAT=3.6V Cout=20uF |
mA | 60 | ||
| Iq | Static Current | BAT=3.6V | uA | 13 | 30 | |
| FOSC | Operating Frequency | MHz | 1 | |||
| OTP | Overtemperature Protection | degC | 150 | |||
| OTP_HYS | Hysteresis | degC | 20 | |||
2. Product Features
- Highly integrated with minimal external components.
- Built-in linear charging mode with a typical current of 8A.
- Three-stage charging (trickle/constant current/constant voltage) with a constant voltage of 4.20V (typical), supporting charging of 0V batteries.
- The charging current automatically decreases based on temperature rise, starting from 130°C, and can drop to zero.
- The charging input has anti-backflow protection, eliminating the need for a backflow prevention diode.
- The boost converter uses synchronous rectification with an efficiency of up to 91%, generating low heat, providing a fixed output of 5.1V (typical) without requiring external resistors.
- Output current of 8A (typical at battery voltage of 3.6V), featuring constant power output with complete overcurrent and short-circuit protection.
- Automatic boost activation upon load insertion and automatic sleep mode when the load is removed.
- Low battery voltage warning function.
- Supports single or dual LED indicators for charging and discharging.
- Shared Input/Output Ports with Smart Charge/Discharge Recognition.
- 4KV ESD Protection.
- Fixed Switching Frequency of 1MHz.
- Overcharge and Overdischarge Protection.
- SOP8 Compact Package.
3. Typical Application Circuit Diagram
4. Pin Diagram and Functional Description
|
|
Pin Name | Pin Number | Functional Description |
| L1 | 1 | Indicator Light 1 | |
| L2 | 2 | Indicator Light 2 | |
| BTP | 3 | Battery Pin | |
| VOUT | 4 | Output Voltage Feedback | |
| VO/IN | 5 | Output/Input Pin | |
| LX | 6 | Inductive Pin | |
| PGND | 7 | Power Ground | |
| AGND | 8 | Analog Ground |
5. Features
- Charging Management Module.
- Boost Converter Module.
- Automatic Switch Module for Simultaneous Charging and Discharging.
- Charge/Discharge Indicator Lights.
- Charger Detection During Single-Port Discharge.
- PCB Layout Reference.
- Electrostatic Protection Measures.
