| Charger Type |
Buck Charger |
| Number of series cells |
1 |
| Power Supply (Min) (V) |
4 |
| Power Supply (Max) (V) |
6 |
| Charge Current (Min) (mA) |
496 |
| Charge Current (Max) (mA) |
2480 |
| VOREG |
Programmable |
| VOREG (Min) (V) |
3.5 |
| VOREG (Max) (V) |
4.5 |
| Control Interface |
IIC |
| Operation Mode |
Host Control |
| IO Logic Level (V) |
1.2 |
| Temperature |
-40℃~85℃ |
| Special Function |
Buck Charger
VBUS_OVP
VIN_OVP
VIN_DPM
VBAT_OVP
OTG |
| Package (mm) |
FCQFN 2X2-20L |
High-Accuracy Voltage ａｎｄ Current Regulation
- Charge Voltage Regulation Accuracy:
±0.5%(25°C), ±1%(0°C to 85°C)
- Charge Current Accuracy: ±5%
Power Up System without Battery
Programmable Charge Parameters through I2CTM compatible Interface(100kHz/400kHz):
-VIN DPM Threshold
-Fast-Charge Current
-Charge Regulation Voltage(3.5V to 4.5V)
-Smart Charge Termination Algorithm
2.5A Charge Current using 33mΩ Sensing Resistor
Specific K-DPMTM: VBUS Based Dynamic Power Management
Up to 94% Charge Efficiency
20V Absolute Maximum VBUS Rating
Trickle-CC-CV Three-stage Automatic Charging Process, Automatic Recharge
Bad Adaptor Detection ａｎｄ Battery Removing Detection
Strong Robust Protection: VBUS OVP, Minimum VBUS during Charging, Battery OVP, Reverse Leakage Protection, Thermal Shutdown
Charge Status ａｎｄ Fault Indication
5.05V,1A Boost Mode Operation for USB OTG for 3.5V to 4.5V Battery Input
FCQFN 2.0mm×2.0mm×0.55mm-20L Package
AW32257 is a high efficiency, large current，switch- mode Li-Ion battery charge management chip. The chip integrates 1.5 MHz synchronous Buck PWM controller, Boost PWM controller and power MOSFETs, effectively reducing the power loss.
The charge process of AW32257 includes: trickle, constant current (CC) and constant voltage (CV). The charge parameters and operating modes are programmable through I2C Interface. Also, the charge termination is determined by a programmable algorithm. The charge process runs automatically and recharging occurs when the battery voltage drops below VOREG-VRCH.
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