SGM41523 [SGMICRO]
Compact Switch, 2.5A Standalone Single-Cell Battery Charger with Safe and Reliable Charging;型号: | SGM41523 |
厂家: | Shengbang Microelectronics Co, Ltd |
描述: | Compact Switch, 2.5A Standalone Single-Cell Battery Charger with Safe and Reliable Charging 电池 |
文件: | 总18页 (文件大小:837K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
SGM41523/SGM41523A/B/C/D
Compact Switch, 2.5A Standalone
Single-Cell Battery Charger
with Safe and Reliable Charging
GENERAL DESCRIPTION
FEATURES
The SGM41523/SGM41523A/SGM41523B/SGM41523C/
SGM41523D are compact switch standalone battery
chargers for single-cell Li-Ion or Li-polymer battery.
They are featured with resistor programmable
maximum charge current, ordering selections of preset
end of charge current and pre-charge current and
floating time out. The SGM41523/SGM41523A/
SGM41523B/SGM41523C/SGM41523D also have
other safety features, such as over-voltage and
over-current protections, fold-back retaining, input
under-voltage lockout, battery temperature monitoring
and thermal shutdown. These features ensure safe and
reliable operation, ease of design and a comfortable
user experience.
● Maximum 2.5A Charging for 4.1V to 4.45V Battery
● 1.33MHz Switch Frequency
● Up to 95.7% Charge Efficiency
● 93% Charge Efficiency at 1.5A from 5V Input
● 91% Charge Efficiency at 1.5A from 9V Input
● Charging Voltage and Current Programmable
● CC/CV Interface for Charge Current and Battery
Voltage Settings
● 4.2V Input Voltage Regulation
● 4.2V to 12V Operating Input Voltage Range
● Up to 18V Sustainable Voltage
● 13.5V Over-Voltage Protection with 100ns
Turn-Off Timer
● Output Voltage Fold-Back Retaining
● Optional High or Low Charge Enable
Active Low (SGM41523/SGM41523A/SGM41523D)
Active High (SGM41523B/SGM41523C)
● JEITA Guideline Compliance
The SGM41523/SGM41523A/SGM41523B/SGM41523C/
SGM41523D are available in a Green TDFN-3×3-12L
package. They operate over an ambient temperature
range of -40℃ to +85℃.
T2 Threshold 10℃
(SGM41523/SGM41523B/SGM41523D)
T2 Threshold 15℃ (SGM41523A/SGM41523C)
Charge Prohibited when > T3 (SGM41523D)
● -40℃ to +85℃ Operating Temperature Range
● Available in a Green TDFN-3×3-12L Package
APPLICATIONS
Portable Audio Speaker
Mobile Phone
Wearables
EPOS
SG Micro Corp
SEPTEMBER 2022 – REV. A. 1
www.sg-micro.com
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
PACKAGE/ORDERING INFORMATION
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
MODEL
SGM
SGM41523
SGM41523A
SGM41523B
SGM41523C
SGM41523D
TDFN-3×3-12L
TDFN-3×3-12L
TDFN-3×3-12L
TDFN-3×3-12L
TDFN-3×3-12L
SGM41523YTDF12G/TR
41523DF
XXXXX
Tape and Reel, 4000
Tape and Reel, 4000
Tape and Reel, 4000
Tape and Reel, 4000
Tape and Reel, 4000
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
SGM
SGXDF
XXXXX
SGM41523AYTDF12G/TR
SGM41523BYTDF12G/TR
SGM41523CYTDF12G/TR
SGM41523DYTDF12G/TR
SGM
SGYDF
XXXXX
SGM
SGZDF
XXXXX
SGM
03HDF
XXXXX
MARKING INFORMATION
NOTE: XXXXX = Date Code, Trace Code and Vendor Code.
X X X X X
Vendor Code
Trace Code
Date Code - Year
Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact your SGMICRO representative directly.
DEVICE COMPARISON TABLE
Part No.
Charge Enable (CE)
T2 Threshold
10℃
Charge Range
T1 ~ T4
SGM41523
SGM41523A
SGM41523B
SGM41523C
SGM41523D
Low
Low
High
High
Low
15℃
T1 ~ T4
10℃
T1 ~ T4
15℃
T1 ~ T4
10℃
T1 ~ T3
SG Micro Corp
SEPTEMBER 2022
www.sg-micro.com
2
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
ABSOLUTE MAXIMUM RATINGS
Voltage Range (with Respect to GND)
OVERSTRESS CAUTION
Stresses beyond those listed in Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods
may affect reliability. Functional operation of the device at any
conditions beyond those indicated in the Recommended
Operating Conditions section is not implied.
VBUS (Converter Not Switching) ........................ -2V to 18V
BTST (Converter Not Switching)...................... -0.3V to 18V
SW, BAT............................................................. -2V to 14V
BTST to SW....................................................... -0.3V to 6V
REGN, TS, CE (Converter Not Switching)......... -0.3V to 6V
CC, CV, STAT.................................................... -0.3V to 6V
Output Sink Current
ESD SENSITIVITY CAUTION
STAT.............................................................................6mA
Package Thermal Resistance
This integrated circuit can be damaged if ESD protections are
not considered carefully. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failureto observe proper handlingand installation procedures
can cause damage. ESD damage can range from subtle
performance degradation tocomplete device failure. Precision
integrated circuits may be more susceptible to damage
because even small parametric changes could cause the
device not to meet the published specifications.
TDFN-3×3-12L, θJA .................................................. 52℃/W
Junction Temperature.................................................+150℃
Storage Temperature Range........................-65℃ to +150℃
Lead Temperature (Soldering, 10s)............................+260℃
ESD Susceptibility
HBM.............................................................................2000V
CDM ............................................................................1000V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range, VVBUS .................................4.2V to 12V
Input Current (VBUS), IIN .....................................2.5A (MAX)
Output Current (SW), ISWOP..................................2.5A (MAX)
Battery Voltage, VBATOP......................................4.45V (MAX)
Fast Charge Current, ICHGOP ................................2.5A (MAX)
Ambient Temperature Range..........................-40℃ to +85℃
Junction Temperature Range .......................-40℃ to +125℃
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
3
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
PIN CONFIGURATION
(TOP VIEW)
1
2
3
4
5
6
12
VBUS
CE
SW
11 SW
CV
CC
10 BTST
GND
9
8
7
REGN
TS
NC
STAT
BAT
TDFN-3×3-12L
PIN DESCRIPTION
PIN
NAME
TYPE (1)
FUNCTION
Charger Input and Voltage Sense. Connect a 10μF ceramic capacitor from VBUS pin to GND close to
device.
1
VBUS
P
Charge Enable Input Pin. When this pin is driven low for SGM41523/SGM41523A/SGM41523D or
driven high for SGM41523B/SGM41523C, the battery charge is enabled.
2
3
CE
CV
DI
AI
Charge Voltage Programming Input Pin. Connect a resistor between this pin and GND, for feeding
different voltages to select 6 different charge voltages.
Charge Current Programming and Charging Inhibition Input Pin. Connect a resistor between this pin
and GND for programming the constant charge current by ICHGREG = K·VREF/RCC. Pull up this pin to a
voltage higher than VCC_H (1.4V) to stop charging.
4
5
CC
NC
AI
‒
No Connection.
Push-Pull Charge Status Output. The STAT pin acts as follows:
During charge: low (LED1 ON, LED2 OFF).
Charge completed or charger in sleep mode: high (LED1 OFF, LED2 ON).
Charge suspended (in response to a fault): 0.65Hz, 50% duty cycle pulses (LEDs BLINKS).
6
7
STAT
BAT
DO
P
Battery Positive Terminal Pin. Use a 22μF capacitor between BAT and GND pins close to the device.
Temperature Sense Input Pin. Connect to the battery NTC thermistor that is grounded on the other side.
To program operating temperature window, it can be biased by a resistor divider between REGN and
GND. Charge suspends if TS voltage goes out of the programmed range. It is recommended to use a
103AT-2 type thermistor.
If NTC feature is not used, connect the NTC pin to ground. The device checks for NTC grounded once
during start-up.
8
9
TS
AI
P
LDO Output that Powers LSFET Driver and Internal Circuits. Internally, the REGN pin is connected to
the anode of the bootstrap diode. Place a 1μF (10V rating) ceramic capacitor between REGN pin and
GND. It is recommended to place the capacitor close to the REGN pin.
REGN
High-side Driver Positive Supply. It is internally connected to the bootstrap diode cathode. Use a 10nF
ceramic capacitor from SW pin to BTST pin.
10
BTST
SW
P
P
Switching Node Output. Connect SW pin to the output inductor. Connect the 10nF bootstrap capacitor
from SW pin to BTST pin.
11,12
Thermal Pad and Ground Reference. It is the ground reference for the device and also the thermal pad
to conduct heat from the device (not suitable for high current return). Tie externally to the PCB ground
plane (GND). Thermal vias under the pad are needed to conduct the heat to the PCB ground planes.
Exposed
Pad
GND
P
NOTE:
1. AI = Analog Input, AO = Analog Output, AIO = Analog Input and Output, DI = Digital Input, DO = Digital Output, DIO = Digital
Input and Output, P = Power.
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
4
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
ELECTRICAL CHARACTERISTICS
(VVBUS_UVLOZ < VVBUS < VVBUS_OV and VVBUS > VBAT + VSLEEP, TJ = -40℃ to +85℃, typical values are at TJ = +25℃, unless
otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Quiescent Currents
VBAT = 4.5V, VVBUS < VVBUS-UVLOZ or no VBUS
VBAT = 4.5V, VVBUS = 5V, fold-back mode
0.1
4.5
1.4
1.7
1.0
7.0
Battery Discharge Current (BAT)
Input Supply Current (VBUS)
IBAT
µA
VVBUS = 5V, VVBUS > VBAT, converter not switching
VVBUS = 12V, VVBUS > VBAT, converter not switching
2.2
IVBUS
mA
VBAT = 3.8V, VVBUS > VBAT, VVBUS > VVBUS_UVLOZ
converter switching
,
8
BAT Pin and VBUS Pin Power-Up
VBUS Operating Range
VVBUS_OP
VVBUS rising
4.2
13.2
3.46
V
V
VBUS for Device Active,
No Battery Sense VBUS Pin Voltage
VVBUS_UVLOZ
3.32
70
VVBUS rising, TJ = +25℃
Device Active Hysteresis
VVBUS_UVLOZ_HYS VVBUS falling from above VVBUS_UVLOZ
mV
VVBUS - VBAT, VVBUSMIN ≤ VBAT ≤ VREGN, VVBUS falling,
TJ = +25℃
Sleep Mode Falling Threshold
VSLEEP
80
165
mV
mV
VVBUS - VBAT, VVBUSMIN ≤ VBAT ≤ VREGN, VVBUS rising,
TJ = +25℃
Sleep Mode Rising Threshold
VSLEEPZ
100
175
260
VBUS 13V Over-Voltage Rising
Threshold
VVBUS_OV_RISE VVBUS rising
VVBUS_OV_HYS VVBUS falling
12.78
13.4
355
3.70
250
24
13.90
V
VBUS 13V Over-Voltage Hysteresis
mV
V
Bad Adapter Detection Falling
Threshold
VVBUSMIN
VVBUSMIN_HYS
IBAD_SRC
VVBUS falling
3.52
17
3.89
30
Bad Adapter Detection Hysteresis
mV
mA
Bad Adapter Detection Current
Source
Sink current from VBUS to GND, TJ = +25℃
Power Path Management
Total High-side MOSFET
On-Resistance - (Q1 + Q2)
Low-side Switching MOSFET
On-Resistance - Q3
RON_HSFET
RON_LSFET
VREGN = 5V
VREGN = 5V
140
100
mΩ
mΩ
Battery Charger
Charge Voltage Program Range
Charge Voltage Step
VBATREG_RANGE
VBATREG_STEP
4.10
4.45
V
TJ = +25℃
50
mV
4.188 4.200
4.171 4.200
4.334 4.347
4.317 4.347
0
4.212
4.229
4.361
4.378
2500
0.550
8.0
TJ = +25℃
RCV = 0Ω or floating
(4.2V)
TJ = -40℃ to +85℃
TJ = +25℃
Initial Charge Voltage Setting
VBATREG
V
RCV = 22.1kΩ
(4.35V)
TJ = -40℃ to +85℃
Charge Current Regulation Range
ICHGREG_RANGE
mA
A
0.475 0.510
-6.7
ICHGREG = 0.515A, TJ = +25℃
%
A
1.19
-3.6
1.23
1.28
Initial Charge Current Regulation
Setting
ICHGREG = 1.235A, TJ = +25℃
ICHGREG = 1.535A, TJ = +25℃
ICHGREG
VBAT = 3.8V
3.5
%
A
1.480 1.535
1.455 1.535
1.580
ICHGREG = 1.535A,
TJ = -40℃ to +85℃
1.605
A
V
BAT = 2.6V,
ICHGREG = 0.515A
31
55
88
Initial Pre-Charge Current
Regulation Setting
IPRECHG
mA
TJ = +25℃, IPRECHG
is 10% of ICHGREG
ICHGREG = 1.235A
101
130
163
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
5
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
ELECTRICAL CHARACTERISTICS (continued)
(VVBUS_UVLOZ < VVBUS < VVBUS_OV and VVBUS > VBAT + VSLEEP, TJ = -40℃ to +85℃, typical values are at TJ = +25℃, unless
otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
Battery Charger
Battery LOW Falling Threshold
Battery LOW Rising Threshold
VBATLOW_FALL
2.68
2.79
3.10
51
2.91
V
V
ICHGREG = 600mA, TJ = +25℃
VBATLOW_RISE Pre-charge to fast charge
ICHGREG = 0.515A
ICHGREG = 1.235A
21.5
92.5
2.02
2.15
30
80.5
154
2.09
2.22
38
Initial Termination Current
Regulation Setting
VBAT = 4.1V, TJ = +25℃,
ITERM
mA
V
I
TERM is 10% of ICHGREG
123
2.05
2.19
33.5
VSHORT
VSHORTZ
ISHORT
VBAT falling, TJ = +25℃
VBAT rising, TJ = +25℃
VBAT < VSHORTZ
Initial Battery Short Voltage
Initial Battery Short Current
mA
mV
mV
Fold-Back Mode Threshold below
VBATREG
VFOLDBACK
VBAT falling
90
Recharge Threshold below VBATREG
Charge Current Amplification Ratio
VRECHG
K
85
140
190
VBAT falling, TJ = +25℃
10300
Constant Current Control Reference
Voltage
VREF
1
V
V
Input Voltage Regulation
Input Voltage Regulation Limit
BAT Pin Over-Voltage Protection
VINDPM
LVDPM version
4.16
VBATOVP_RISE
VBATOVP_FALL
VBAT rising
VBAT falling
103
101
104.5
102.5
106
104
As percentage of VBATREG
,
Battery Over-Voltage Threshold
%
TJ = +25℃
Thermal Regulation and Thermal Shutdown
Junction Temperature Regulation
Threshold
TJUNCTION_REG Temperature increasing
110
℃
Thermal Shutdown Rising
Temperature
TSHUT
Temperature increasing
150
10
℃
℃
Thermal Shutdown Hysteresis
TSHUT_HYS
JEITA Thermistor Comparator
T1 (0℃) Threshold Voltage
Charger suspends if temperature T is below T1
(T < T1), as percentage to VREGN
73.2
71.3
%
%
on TS Pin
VT1
VT1 Falling
As percentage of VREGN
Charge back to ICHGREG/10 and VBATREG - 100mV
if T1 < T <T2, as percentage of VREGN
(SGM41523/SGM41523B/SGM41523D)
T2 (10℃) Threshold Voltage
68.1
66.6
65.1
%
%
%
on TS Pin
VT2
As percentage of VREGN
(SGM41523/SGM41523B/SGM41523D)
VT2 Falling
Charge back to ICHGREG/10 and VBATREG - 100mV
if T1 < T< T2, as percentage of VREGN
(SGM41523A/SGM41523C)
T2 (15℃) Threshold Voltage
on TS Pin
VT2
As percentage of VREGN
(SGM41523A/SGM41523C)
VT2 Falling
VT3 Rising
63.3
46.0
44.2
35.8
34.6
%
%
%
%
%
As percentage of VREGN
VT3
T3 (45℃) Threshold Voltage
on TS Pin
Charge back to ICHGREG/10 and VBATREG - 100mV
if T3 < T <T4, as percentage to VREGN
As percentage of VREGN
VT4 Rising
VT4
T4 (60℃) Threshold Voltage
on TS Pin
Charge suspended if T > T4,
as percentage of VREGN
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
6
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
ELECTRICAL CHARACTERISTICS (continued)
(VVBUS_UVLOZ < VVBUS < VVBUS_OV and VVBUS > VBAT + VSLEEP, TJ = -40℃ to +85℃, typical values are at TJ = +25℃, unless
otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
Charge Over-Current Comparator (Cycle-by-Cycle)
HSFET Cycle-by-Cycle
IHSFET_OCP
4
A
Over-Current Threshold
Charge Under-Current Comparator (Cycle-by-Cycle)
LSFET Under-Current Falling
VLSFET_UCP
From sync mode to non-sync mode
100
mA
Threshold
PWM
PWM Switching Frequency
Maximum PWM Duty Cycle
REGN LDO
fSW
1.20
1.33
98
1.45
MHz
%
Oscillator frequency, Buck mode, TJ = +25℃
DMAX
VVBUS = 9V, IREGN = 40mA
VVBUS = 5V, IREGN = 20mA
4.70
4.79
4.90
4.86
5.10
4.92
REGN LDO Output Voltage
VREGN
V
REGN LDO Maximum Output
Current
IREGN_MAX
VVBUS = 5V
56
68
80
mA
Logic I/O Pin Characteristics (nCE)
Input Low Threshold
VIL
VIH
0.2
V
V
Input High Threshold
0.8
4.6
High-Level Leakage Current
Logic I/O Pin Characteristics (STAT)
High-Level Output Voltage
Low-Level Output Voltage
Output or Sink Current Ability
IBIAS
Pull up rail 1.8V
0.1
3.3
µA
VOH
VOL
V
V
0.3
ISTAT
mA
TIMING REQUIREMENTS
PARAMETER
VVBUS/VBAT Power-Up
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
VBUS OVP Reaction Time
tACOV
VVBUS rising above ACOV threshold to turn off Q2
100
42
ns
Wait Window for Bad Adapter
Detection
tBAD_SRC
ms
Battery Charger
Deglitch Time for Charge
Termination
tTERM_DGL
tRECHG_DGL
tBATOVP
168
168
1
ms
ms
µs
Deglitch Time for Recharge
Battery Over-Voltage Deglitch Time
to Disable Charge
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
7
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
TYPICAL PERFORMANCE CHARACTERISTICS
Charging Efficiency vs. Charge Current
Constant Charge Voltage Accuracy vs. Battery Voltage
98
96
94
92
90
88
86
84
82
80
0.4
0.2
VVBUS = 5V, Fast Charging Current = 2A
VBAT = 4.2V, Inductor DCR = 5.5mΩ
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
-1.4
CV = 4.1V
CV = 4.2V
CV = 4.3V
CV = 4.35V
CV = 4.4V
CV = 4.45V
VVBUS = 5V
V
V
VBUS = 9V
VBUS = 12V
0.1 0.4 0.7
1
1.3 1.6 1.9 2.2 2.5 2.8
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8
2
Charge Current (A)
Charge Current (A)
Fast Charge Current vs. Battery Voltage
CV = 4.4V, Fast Charging Current = 1.2A
Constant Charge Voltage Accuracy vs. Battery Voltage
VVBUS = 9V, Fast Charging Current = 2A
1300
1280
1260
1240
1220
1200
1180
1160
1140
1120
1100
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
-1.4
CV = 4.1V
CV = 4.2V
CV = 4.3V
CV = 4.35V
CV = 4.4V
CV = 4.45V
VVBUS = 5V
V
V
VBUS = 9V
VBUS = 12V
3
3.2
3.4
3.6
3.8
4
4.2
4.4
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8
2
Battery Voltage (V)
Charge Current (A)
Fast Charge Current vs. Battery Voltage
CV = 4.4V, Fast Charging Current = 2A
Constant Charge Voltage Accuracy vs. Battery Voltage
VVBUS = 12V, Fast Charging Current = 2A
2100
2075
2050
2025
2000
1975
1950
1925
1900
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
-1.4
CV = 4.1V
CV = 4.2V
CV = 4.3V
CV = 4.35V
CV = 4.4V
CV = 4.45V
VVBUS = 5V
V
V
VBUS = 9V
VBUS = 12V
3
3.2
3.4
3.6
3.8
4
4.2
4.4
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6 1.8
2
Charge Current (A)
Battery Voltage (V)
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
8
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Charge Enabled
Charge Disabled
VVBUS = 5V, 3.8V Battery, 2A Charge Enabled
VVBUS = 5V, 3.8V Battery, 2A Charge Disabled
STAT
nCE
STAT
nCE
SW
SW
IBAT
IBAT
Time (500μs/div)
Time (20μs/div)
Power-Up with Charge Enabled
Power-Up with Charge Enabled
VVBUS = 5V, No Battery, Charge Enabled
VVBUS = 5V, 3.8V Battery, 2A Charge Enabled
VBUS
REGN
VBUS
SW
VBAT
SW
IBAT
Time (20ms/div)
Time (50ms/div)
Power-Up with Charge Enabled
Power-Up with Charge Enabled
VVBUS = 9V, 3.8V Battery, 2A Charge Enabled
VBUS
VBUS
REGN
SW
REGN
SW
VVBUS = 12V, 3.8V Battery,
2A Charge Enabled
IBAT
IBAT
Time (20ms/div)
Time (20ms/div)
SG Micro Corp
SEPTEMBER 2022
www.sg-micro.com
9
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
TYPICAL APPLICATION CIRCUIT
L 1μH
4.2V to 12V
System Load
USB
VBUS
SW
CIN
10μF
CBTST
10nF
COUT
22μF
BTST
GPIO
CE
BAT
CV
CC
GND
SGM41523
SGM41523A/B/C/D
RCV
RCC
VREGN
VREGN
REGN
RST1
CREGN
ICHG = 2.5A
1μF
LED1
RT1
STAT
TS
RST2
RT2
LED2
Figure 1. Typical Application Circuit
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
10
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
FUNCTIONAL BLOCK DIAGRAM
VBUS
RBFET (Q1)
REGN
LDO
REGN
BTST
Q1
Control
Protections:
Voltage & Current
Sensing
OVP
UVP
OCP
UCP
OTP
&
DAC Reference
HSFET (Q2)
SW
Converter
Control
REGN
LSFET (Q3)
GND
BAT
REGN
Digital
Control
STAT
BAT_OVP
Recharge
Termination
BATLOWV
BATSHORT
Fold-Back
CE
CC
CV
Battery
Temperature
Sensing
CC/CV
Interface
JEITA
Control
TS
SGM41523
SGM41523A/B/C/D
Figure 2. Block Diagram
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
11
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
DETAILED DESCRIPTION
according to JEITA profile. This device also features thermal
regulation in which the charge current is reduced if the
junction temperature exceeds 110℃. The STAT output can
report the status of the charge and any fault conditions.
Overview
The
SGM41523/SGM41523A/SGM41523B/SGM41523C/
SGM41523D are highly-integrated 2.5A switch-mode stand-
alone battery charge management devices for applications
such as cell phones, tablets and portable devices that use
single-cell Li-Ion and Li-polymer batteries. The devices have
a low impedance power path that improves the operation
efficiency of the switch-mode, reduces the battery charging
time and extends battery life in the discharging phase. The
charging setting with the CC/CV interface makes the device a
flexible solution. These devices include three main power
switches: input reverse blocking FET (RBFET, Q1), high-side
switching FET (HSFET, Q2) and low-side switching FET
(LSFET, Q3). The bootstrap diode of the high-side gate drive
is also integrated to simplify the system design.
Power-On Reset (POR)
The internal circuit of the device is powered from the voltage
VVBUS. When the voltage of VBUS goes above its UVLO level
(VVBUS > VVBUS_UVLOZ), a POR happens and activates the
sleep comparator. Upon activation, the CC/CV interface will
also be ready for charge current and voltage settings.
Battery Charging Management
Battery Charging Profile
The
SGM41523/SGM41523A/SGM41523B/SGM41523C/
SGM41523D feature a full battery charging profile with five
phases. In the beginning of the cycle, the battery voltage
(VBAT) is tested and appropriate current and voltage regulation
levels are selected as shown in Table 1. Depending on the
detected status of the battery, the proper phase is selected to
start or for continuation of the charging cycle. The phases are
trickle charge (VBAT < 2.19V), pre-charge, fast-charge (constant
current and constant voltage) and fold-back mode.
The start and termination of a charging cycle can be
accomplished without software control. The sensed battery
voltage is used to decide the starting phase of charge in one
of the three phases of charge cycle: pre-conditioning,
constant current or constant voltage. When the charge
current falls below a preset limit and the battery voltage is
above recharge threshold, the charger function will
automatically terminate and end the charging cycle. When the
voltage of a charged battery is below the recharge threshold,
the charger starts another charging cycle.
Table 1. Charge Current Setting Based on VBAT
VBAT Voltage
< 2.19V
Charge Current
ISHORT
The
SGM41523D have several safety features, such as
over-voltage and over-current protections, battery
SGM41523/SGM41523A/SGM41523B/SGM41523C/
2.19V to 3V
> 3V
IPRECHG
ICHGREG
temperature monitoring, input UVLO and thermal shutdown.
TS pin is connected to an NTC thermistor for battery
temperature monitoring and protection in charge mode
Regulation Voltage
VBATREG
Fold-Back Voltage
Battery Voltage
Charge Current
ICHGREG
Charge Current
VBATLOW (3V)
V
SHORTZ (2.19V)
IPRECHG
ITERM
ISHORT
Trickle Charge Pre-charge
Fast Charge and Voltage Regulation
Fold-Back
Figure 3. Battery Charging Profile
SG Micro Corp
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SEPTEMBER 2022
12
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
DETAILED DESCRIPTION (continued)
At cool temperature (T1 - T2) or at warm temperature (T3 -
T4), the charge current reduces to 10% of the charge current,
and the charge voltage is decreased by about 100mV
automatically. Particularly, the SGM41523D is charge
prohibited at warm temperature.
Charge Termination
A charge cycle is terminated when the battery voltage is
higher than the recharge threshold and the charge current
falls below the programmed termination current. The
termination current is programmed to ICHGREG/10 with a
minimum clamped value of 50mA (TYP). To fully charge a
battery, it is recommended to set the ICHGREG to be much
higher than 50mA. After the charging cycle is completed, the
converter enters fold-back mode.
SGM41523
SGM41523A/B/C/D
BAT
The
SGM41523/SGM41523A/SGM41523B/SGM41523C/
REGN
22μF
SGM41523D have no battery switch but provide an
alternative way for battery safe and extended battery life,
which is the voltage fold-back mode when a battery is fully
charged while the input power is kept. This alternative has
less energy loss as no switch in the discharge loop. The only
penalty is that it could not support instant start if the battery
voltage is excessive low, in which condition it takes a few
more minutes for the load system to be ready for start. When
the device operates in FBM, the output voltage VFOLDBACK is
1μF
RT1
TS
NTC
103AT-2
RT2
Figure 4. Battery Thermistor Connection and Bias Network
The resistor bias network (see Figure 4) can be calculated
based on the following equations:
lower than VBATREG
, and the output current limit is
ICHGREG_FOLDBACK (2.4A).
1
1
RTHCOLD ×RTHHOT
×
−
Compliance with JEITA Guideline
JEITA guideline (April 20, 2007 release) is implemented in the
device for safe charging of the Li-Ion battery. JEITA highlights
the considerations and limits that should be considered for
charging at cold or hot battery temperatures. High charge
current and voltage must be avoided outside normal
operating temperatures (typically 0 ℃ and 60 ℃ ). This
functionality can be disabled if not needed. Four temperature
levels are defined by JEITA from T1 (minimum) to T4
(maximum). Outside this range, charging should be stopped.
The corresponding voltages sensed by NTC are named VT1 to
VT4. Due to the sensor negative resistance, a higher
temperature results in a lower voltage on TS pin. The battery
cool range is between T1 and T2, and the warm range is
between T3 and T4. Charge must be limited in the cool and
warm ranges.
(1)
VT1 VT4
RT2
=
1
1
RTHHOT
×
−1 −R
×
−1
THCOLD
VT4
VT1
1
VT1
−1
(2)
RT1
=
1
1
+
RT2
RTHCOLD
where VT1 and VT4 are TCOLD and THOT threshold voltage on
TS pin as percentage to VREGN. Select TCOLD = 0℃ and THOT
= 60℃ for Li-Ion or Li-polymer batteries. For a 103AT-2 type
thermistor RTHCOLD = 27.28kΩ and RTHHOT = 3.02kΩ, the
calculation results are: RT1 = 5.18kΩ and RT2 = 29.34kΩ. The
standard value is 5.23kΩ for RT1 and 29.4kΩ for RT2.
Table 2. Temperature Related Charging Control
One of the conditions for starting a charge cycle is having the
TS voltage within VT1 to VT4 window limits. If during the
charge, battery gets too cold or too hot and TS voltage
exceeds the T1 - T4 limits, charging is suspended (zero
charge current) and the controller waits for the battery
temperature to come back within the T1 to T4 window.
Temperature Range
Lower than T1
T1 - T2
Charge Current Charge Voltage
/
/
ICHGREG × 10%
ICHGREG
VBATREG - 100mV
VBATREG
T2 - T3
T3 - T4
(SGM41523/SGM41523A/
SGM41523B/SGM41523C)
ICHGREG × 10%
VBATREG - 100mV
T3 - T4 (SGM41523D)
Higher than T4
/
/
/
/
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
13
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
DETAILED DESCRIPTION (continued)
When the device recovers and TJ falls below the hysteresis
band of TSHUT_HYS (10℃ under TSHUT), the converter resumes
automatically.
Charging Status (STAT Pin)
Charging state is indicated with the push-pull STAT pin as
explained in Table 3. This pin is able to drive two LEDs (see
Figure 1).
Battery Over-Voltage Protection
The over-voltage limit for the battery is 4.5% above the
battery regulation voltage setting. Charging will immediately
disable if a battery over-voltage occurs.
Table 3. STAT Pin Function
Charging State
Charging battery (or recharge)
Charging completed
STAT Indicator
Low (LED1 ON, LED2 OFF)
High (LED1 OFF, LED2 ON)
Battery Over-Discharge Protection
To recover from over-discharge, an input source is required at
VBUS pin. The battery is charged with ISHORT (33.5mA TYP)
when the VBAT < VSHORT, or with a pre-charge current when
Charging is disabled or in sleep mode High (LED1 OFF, LED2 ON)
Charge is suspended due to input
over-voltage, TS fault, or battery 0.65Hz Blinking
over-voltage
the battery voltage is between VSHORT and VBATLOW
.
Protections Features
Input Over-Voltage
Charging Voltage Programming
If VBUS voltage exceeds VVBUS_OV, switching will stop
immediately. Charger resumes its normal operation when the
voltage comes back below OVP limit.
Forcing a voltage on the CV pin, or grounding it with a resistor
that presents a similar voltage against the constant current
sourcing from the pin during charging selects 1 of 6 charging
voltages, as shown in Table 4.
Thermal Regulation and Thermal Shutdown
Internal junction temperature (TJ) is always monitored to
avoid overheating. A limit of +110 ℃ is considered for
maximum IC surface temperature in Buck mode and if TJ
intends to exceed this level, the device reduces the charge
current to keep maximum temperature limited to +110℃
(thermal regulation mode). As expected, the actual charging
current is usually lower than programmed value during
thermal regulation.
Charge Current Programming and Turn-Off
Charge current is programmed by using different RCC
resistance or by providing voltage difference on the RCC by
forcing a voltage on the other end, which could be generated
by a DAC or PWM output.
Forcing the CC to a voltage higher than VCC_H (1.4V) turns the
device off.
If the junction temperature exceeds TSHUT (+150℃), thermal
shutdown protection arises in which the converter is turned
off.
Table 4. Conditions for Selecting a Charging Voltage
Charging Voltage (V)
Forcing Voltage (V)
Separation Thresholds (V)
Recommended Grounding Resistance (kΩ)
4.1
4.2
0.45
0.3 ~ 0.6
< 0.3 or > 2.0
0.6 ~ 0.9
9.09
Grounding or Open
Grounding or Floating
4.3
0.75
1.05
1.4
15
21
4.35
4.4
0.9 ~ 1.2
1.2 ~ 1.6
28
4.45
1.8
1.6 ~ 2.0
35.7
NOTE: Sourcing current out of the CV is typically 50μA.
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
14
SGM41523
SGM41523A/B/C/D
Compact Switch, 2.5A Standalone Single-Cell
Battery Charger with Safe and Reliable Charging
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
SEPTEMBER 2022 ‒ REV.A to REV.A.1
Page
Updated Electrical Characteristics section.......................................................................................................................................................5, 6
Changes from Original (AUGUST 2022) to REV.A
Page
Changed from product preview to production data.............................................................................................................................................All
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
15
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
TDFN-3×3-12L
D
e
N7
N12
E1
N1
D1
k
E
N6
L
b
BOTTOM VIEW
TOP VIEW
2.55
1.60
2.8
A
A1
0.6
A2
SIDE VIEW
0.2
0.45
RECOMMENDED LAND PATTERN (Unit: mm)
Dimensions
In Millimeters
Dimensions
In Inches
Symbol
MIN
MAX
0.800
0.050
MIN
0.028
0.000
MAX
0.031
0.002
A
A1
A2
D
0.700
0.000
0.203 REF
0.008 REF
2.924
2.450
2.924
1.500
3.076
2.650
3.076
1.700
0.115
0.096
0.115
0.059
0.121
0.104
0.121
0.067
D1
E
E1
k
0.200 MIN
0.450 TYP
0.008 MIN
0.018 TYP
b
0.150
0.324
0.250
0.476
0.006
0.013
0.010
0.019
e
L
NOTE: This drawing is subject to change without notice.
SG Micro Corp
TX00062.000
www.sg-micro.com
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
P0
W
Q2
Q4
Q2
Q4
Q2
Q4
Q1
Q3
Q1
Q3
Q1
Q3
B0
Reel Diameter
P1
A0
K0
Reel Width (W1)
DIRECTION OF FEED
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Reel Width
Reel
Diameter
A0
B0
K0
P0
P1
P2
W
Pin1
Package Type
W1
(mm)
(mm) (mm) (mm) (mm) (mm) (mm) (mm) Quadrant
TDFN-3×3-12L
13″
12.4
3.30
3.30
1.10
4.0
8.0
2.0
12.0
Q1
SG Micro Corp
TX10000.000
www.sg-micro.com
PACKAGE INFORMATION
CARTON BOX DIMENSIONS
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Length
(mm)
Width
(mm)
Height
(mm)
Reel Type
Pizza/Carton
13″
386
280
370
5
SG Micro Corp
www.sg-micro.com
TX20000.000
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