EN

AW32257FCR

Switch-mode Single Cell Li-ion Battery Charger With Full USB Compliance and USB-OTG Support

Product details

Parameters

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<br>VBUS_OVP<br>VIN_OVP<br>VIN_DPM<br>VBAT_OVP<br>OTG
Package (mm) FCQFN 2X2-20L

Package | Pins | Size

FCQFN 2X2-20L

Features

 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

Description

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.

Technical documentation

Type
Title
Language
Date
Datasheet DS_AW32257_EN_V1.5 英文   2023-11-20
Product Design Guide AW32257 Hardware Design Guide 英文   2024-07-25

Design & development

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