GENERAL DESCRIPTION

The SGM41562A and SGM41562B are highly integrated, I2

C

programmable, single-cell Li-Ion or Li-polymer battery chargers

with system power path management. They are specifically

designed for portable applications requiring minimum board

space and small external components. The charging profile

includes pre-charge, constant-current and constant-voltage

phases. Several safety and protection features are included

such as built-in safe charge timer to set maximum duration of

charge and pre-charge, input voltage and current monitoring,

internal (junction) and external (battery) temperature monitoring,

input current limiting and load current limiting. SGM41562A

can charge with a wide input voltage range of up to 18V

compared to the SGM41562B which has 5.75V charging

range, but the rest of their functions are the same.

The SGM41562A/B has 3 power ports: input power port (IN),

battery port (BAT) and system or load port (SYS). The system

is powered from the input whenever it is available. Input is

typically a USB power source. If the input source is weak or

removed, power source for the system will automatically switch

to the battery. The voltage and currents from input and

battery as power sources are continuously monitored to

prevent battery damage due to excessive currents or

over-discharge.

I

2

C serial interface is used to program the device functions

and parameters or to read its status. 12 read/write or read only

8-bit registers (REG00 to REG0B) are accessible. A watchdog

protection feature is also included. If this feature is enabled

and there is no in time read/write activity or signal from the

host, the device will reset the charging parameters to their

defaults and recycles power to the system (turn off/on) that

may reset the host.

The SGM41562A is capable of charging with input voltages

as high as 18V but with higher input voltages, the chip

temperature can easily rise up and thermal protection may

stop charging if proper cooling is not considered. The

SGM41562B goes into voltage protection state if VIN > 6V.

The input changes are continuously monitored and a system

power recycle (SYS) may occur if the system does not

response to the input toggles.

The SGM41562A/B is available in a Green WLCSP-1.52×1.52-9B

package. Device functionality and protection features are

assured in the ambient temperature range from -40℃ to

+125℃. Charging parameters are guaranteed in 0℃ to +55℃.

FEATURES

● Fully Autonomous Charger for Single-Cell Li-Ion and

Li-Polymer Battery

● ±0.6% Charging Voltage Accuracy

● 21V Maximum Input Voltage Rating with Over-Voltage

Protection

● 18V Maximum Operating Voltage (SGM41562A)

● 5.75V Maximum Operating Voltage (SGM41562B)

● I

2

C Interface for Parameters Setting/Status Reporting

● Fully Integrated Power Switches

● No External Blocking Diode Required

● Built-in Robust Charge Protections Including Battery

Temperature Monitor and Programmable Timer

● Battery or PCB Over-Temperature Protection

● Built-in Battery Disconnection Function

● System Reset Function

● Thermal Limit Regulation on Chip

● Available in a Green WLCSP-1.52×1.52-9B Package

APPLICATIONS

Wearable Devices

IoT Gadgets