APW7262
3MHz Synchronous Switch-Mode Battery Charger with Full USB Compli-
ance and USB-OTG Boost Regulator
Features
General Description
• Charge Faster Than Linear Charger
The APW7262 combine switch-mode battery charger and
• 3MHz with 0% to 99.5% Duty Cycle Synchronous a boost regulator with fixed 3MHz switching frequency,
Switch-Mode Charger with 1.5A Integrated N- which drives two integrated N-channel power MOSFETs.
MOSFETs
• 4V-6V Input Operating Range
• 20V Absolute Maximum Input Voltage
• Safety
In battery charging, the high-efficiency step-down DC/DC
converter is capable of delivering 1.5A output current over
a wide input voltage range from 4V to 6V for APW7262, the
step-down DC/DC converter is ideally suited for portable
electronic devices that are powered from 1-cell Li-ion
-Reverse leakage protection to prevent battery battery. The Charging parameters and operating modes
drainage
-Thermal regulation and protection
can be programmed through an I2C interface. The
APW7262 has high accuracy regulation of input current,
-Input/output over-voltage protection
charge current and charge voltage. It equipped with charge
-Cycle-by-cycle current limit
termination, and charge status monitoring for battery
• Accuracy
detection.
-+1% charge voltage regulation (0 to 85oC)
The APW7262 charge the battery in three phases:
-+5% charge current regulation
conditioning, constant current and constant voltage. The
-+5% input current regulation (100mA and
APW7262 features Dynamic Power Management (DPM)
500mA)
mode to accomplish input power limiting. The input cur-
• Built-In Input Current Sensing and Limiting
rent is limited to the value set by the I2C host. This feature
• Automatic Charging
• Programmable Through High-Speed I2C
Interface(3.4Mb/s)
-Input Current Limit
-Fast-Charge and Termination Current
-Charge Regulation Voltage
-Weak Battery Voltage Threshold
-VIN DPM Threshold
-Termination Enable/Disable
-OTG Enable/Disable
-Reset All Parameter Control
-Safety Timer with Reset Control
• 5V, 500mA Boost Mode for USB OTG for 2.5V to
4.5V Battery Input
• Available in 1.7mmx2.1mm WLCSP-20 and
TQFN4x4-20A Packages
reduces battery charge current when the input power limit
is reached to avoid overloading the AC adapter when sup-
plying the load and the battery charger simultaneously.
The charge termination is based on battery voltage, a
programmed minimum current level and charge current
termination bit set by the I2C host.
If the battery voltage falls below an internal threshold, the
APW7262 automatically restarts the charge cycle, and
when the input voltage falls below the battery voltage, it
will enter a low-quiescent current sleep mode. The
APW7262 supports the thermal regulation and over tem-
perature protection to maintain the junction temperature
of 120oC by reducing charge current.
The APW7262 can operate as a boost regulator. To sup-
port USB OTG device, APW7262 can provide VBUS
(5.05V) by boosting the battery voltage.
The APW7262 is available in1.7mmx2.1mm WLCSP-20
and TQFN4x4-20A packages.
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Jul., 2014
1
www.anpec.com.tw
