中文
EnglishAPW7262 has high accuracy regulation of input current, charge current and charge voltage. It equipped with charge termination, and charge status monitoring for battery detection.
Features
Charge Faster Than Linear Charger
3MHz with 0% to 99.5% Duty Cycle Synchronous
Switch-Mode Charger with 1.5A Integrated N-
MOSFETs
4V-6V Input Operating Range
20V Absolute Maximum Input Voltage
Safety
-Reverse leakage protection to prevent battery
drainage
-Thermal regulation and protection
-Input/output over-voltage protection
-Cycle-by-cycle current limit
Accuracy
-+1% charge voltage regulation (0 to 85oC)
-+5% charge current regulation
-+5% input current regulation (100mA and
500mA)
Built-In Input Current Sensing and Limiting
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
General Description
The APW7262 combine switch-mode battery charger and
a boost regulator with fixed 3MHz switching frequency,
which drives two integrated N-channel power MOSFETs.
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
battery. The Charging parameters and operating modes
can be programmed through an I 2C interface. The
APW7262 has high accuracy regulation of input current,
charge current and charge voltage. It equipped with charge
termination, and charge status monitoring for battery
detection.
The APW7262 charge the battery in three phases:
conditioning, constant current and constant voltage. The
APW7262 features Dynamic Power Management (DPM)
mode to accomplish input power limiting. The input cur-
rent is limited to the value set by the I2C host. This feature
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.
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