SG Micro SGM41562A Manual

GENERAL DESCRIPTION
The SGM41562A and SGM41562B are highly integrated, I
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.
2
I 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 V
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℃.
SG Micro Corp
www.sg-micro.com
500mA Single-Cell Li-Ion Battery Charger
with Power Path Management
2
C
> 6V.
IN
SGM41562A/SGM41562B
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)
2
● I 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
TYPICAL APPLICATION
IN
USB
4.7μF
Port
Qbypass
VDD
SGM41562B
1μF
nINT
Host
SDA
SCL
GND
Figure 1. Typical Application Circuit
System Load
SYS
10μF
Qrvs
BAT
4.7μF
NTC
VDD
JANUARY 2022 - REV. A. 1
Li-Ion
Battery
Pack