SGM40560 [SGMICRO]
Small Capacity Compact Battery Charger for Loosely Coupled Wireless Charging/Solar Charging;
| 型号： | SGM40560 |
| 厂家： | 
Shengbang Microelectronics Co, Ltd |
| 描述： | Small Capacity Compact Battery Charger for Loosely Coupled Wireless Charging/Solar Charging 电池 无线 |
| 文件： | 总18页 (文件大小：792K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SGM40560
Small Capacity Compact Battery Charger for
Loosely Coupled Wireless Charging/Solar Charging
GENERAL DESCRIPTION
FEATURES
The SGM40560 is designed for the monolithic circuit
with high-precision linear constant-current, and
constant-voltage charging, which is specifically for
small capacity Li-Ion/polymer Li-Ion secondary battery.
It can complete the whole processes of pre-charge,
fast-charge, trickle floating charge, voltage fold-back
holding, resistive voltage drop compensation and
recharge stand-alone. The maximum charge voltage is
fixed with five options:
● Stand-Alone Working of Complete Processes for
Single-Cell Battery Charging
● Suitable for Li-Ion Phosphate Battery/
Li-Ion/Polymer Li-Ion/Lithium Titanate/
Nickel-Metal Hydride Secondary Battery and
EDLC Capacitor Charging
● Optional Maximum Charge Voltage:
3.65V to 5.5V
● High Accuracy Safe and Fast Charging
● 4% Output Voltage Fold-Back Holding Function
● Works with Loose Coupling Coil
● Works with Solar Batteries
● Saturated Conduction Charging
● Automatic Thermal Current Limit
● Power Saving Indication Mode
● Available in Green TDFN-2×2-6AL and SOIC-8
(Exposed Pad) Packages
SGM40560-3.65 corresponds to 3.65V/3.709V/4.547V
SGM40560-4.05 corresponds to 4.05V/4.108V/5.045V
SGM40560-4.2 corresponds to 4.2V/4.257V/5.235V
SGM40560-4.3 corresponds to 4.3V/4.356V/5.363V
SGM40560-4.4 corresponds to 4.4V/4.466V/5.484V
The charge current is set with the external resistor. The
slow blinking LED indicates charging in progress and
the continuous shining LED within a certain time
indicates charging completion, which can be charged
even with weak energy. It can operate with
constant-voltage power supply, additionally, depending
on its features and control structure. It can charge for
the loose coupling coil with large voltage fluctuations
and it also works for the solar batteries with reverse
current. Therefore, it can provide flexible power supply
options for wearable devices and mini portable devices.
It has the voltage fold-back holding function and
thermal current limit function so that the external power
source can be used to supply power to the load for a
long time safely and stably.
APPLICATIONS
Bluetooth Headsets, Bluetooth Mouses
Wireless Thermometers, Wireless Oximeters, Wireless
Pulsimeters
Active Keys, Active Beacons
Photovoltaic Storage Maintenance, Hub Dynamo
Storage Maintenance
The SGM40560 is available in Green TDFN-2×2-6AL
and SOIC-8 (Exposed Pad) packages and is rated over
the -40℃ to +125℃ temperature range.
TYPICAL APPLICATION
BAT
VIN
C2
B
D
Power
Input
C1
IREF SGM40560
F
Load
RIREF
nCHG
GND
Figure 1. Typical Application Circuit
SG Micro Corp
www.sg-micro.com
OCTOBER 2022 – REV. A
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
PACKAGE/ORDERING INFORMATION
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
MODEL
GZ7
XXXX
TDFN-2×2-6AL
SGM40560-3.65XTDI6G/TR
SGM40560-3.65XPS8G/TR
SGM40560-4.05XTDI6G/TR
SGM40560-4.05XPS8G/TR
SGM40560-4.2XTDI6G/TR
SGM40560-4.2XPS8G/TR
SGM40560-4.3XTDI6G/TR
SGM40560-4.3XPS8G/TR
SGM40560-4.4XTDI6G/TR
SGM40560-4.4XPS8G/TR
Tape and Reel, 3000
Tape and Reel, 4000
Tape and Reel, 3000
Tape and Reel, 4000
Tape and Reel, 3000
Tape and Reel, 4000
Tape and Reel, 3000
Tape and Reel, 4000
Tape and Reel, 3000
Tape and Reel, 4000
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
SGM40560-3.65
SGM
M12XPS8
XXXXX
SOIC-8
(Exposed Pad)
GLD
XXXX
TDFN-2×2-6AL
SGM40560-4.05
SGM40560-4.2
SGM40560-4.3
SGM40560-4.4
SGM
M13XPS8
XXXXX
SOIC-8
(Exposed Pad)
GW1
XXXX
TDFN-2×2-6AL
SGM
M14XPS8
XXXXX
SOIC-8
(Exposed Pad)
GW2
XXXX
TDFN-2×2-6AL
SGM
M15XPS8
XXXXX
SOIC-8
(Exposed Pad)
GW3
XXXX
TDFN-2×2-6AL
SGM
M16XPS8
XXXXX
SOIC-8
(Exposed Pad)
MARKING INFORMATION
NOTE: XXXX = Date Code. XXXXX = Date Code and Vendor Code.
Serial Number
Y Y Y
XX XX
X X X X X
Vendor Code
Date Code - Week
Date Code - Year
Date Code - Week
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.
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
2
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar 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.
VIN................................................................... -0.3V to 10V
BAT, IREF.......................................................... -0.3V to 6V
F........................................................... -0.3V to VBAT + 0.3V
nCHG............................................................ -0.3V to 13.2V
Package Thermal Resistance
TDFN-2×2-6AL, θJA................................................ 100℃/W
SOIC-8 (Exposed Pad), θJA...................................... 50℃/W
Junction Temperature.................................................+150℃
Storage Temperature Range.......................-65℃ to +150℃
Lead Temperature (Soldering, 10s)............................+260℃
ESD Susceptibility
ESD SENSITIVITY CAUTION
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.
HBM.............................................................................4000V
CDM ............................................................................1000V
RECOMMENDED OPERATING CONDITIONS
Supply Voltage Range........................................2.7V to 7.5V
Charge Current Range ...................................5mA to 700mA
Operating Temperature Range....................-40℃ to +125℃
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
DEVICE SELECTION TABLE
Maximum Charge Voltage (V)
Model
F Connects to GND
F Connects to BAT F Floats or Connects to the Half of BAT Level
SGM40560-3.65
SGM40560-4.05
SGM40560-4.2
SGM40560-4.3
SGM40560-4.4
3.65
4.05
4.2
3.709
4.108
4.257
4.356
4.466
4.547
5.045
5.235
5.363
5.484
4.3
4.4
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
3
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
PIN CONFIGURATIONS
(TOP VIEW)
(TOP VIEW)
1
2
8
7
VIN
BAT
F
1
2
3
6
5
4
VIN
BAT
F
nCHG
nCHG
GND
GND
GND
NC
3
4
6
5
IREF
NC
GND
IREF
TDFN-2×2-6AL
SOIC-8 (Exposed Pad)
PIN DESCRIPTION
PIN
NAME TYPE (1)
FUNCTION
SOIC-8
TDFN-2×2-6AL
(Exposed Pad)
Power Input Pin. It is recommended to use a 1μF (or larger value) X5R
ceramic capacitor from VIN pin to ground to get good power supply
decoupling. This ceramic capacitor should be placed as close as
possible to VIN pin.
Charge Status Indication. Period T = 1280ms when the battery is
charging, this pin sinks current intermittently in T/8. When charging is
complete, this pin sinks current continuously for 40 indication cycles,
that is 51.2s, then the nCHG is high impedance.
1
2
1
2
VIN
P
nCHG
O
3
3
GND
NC
G
Ground.
‒
4, 5
‒
No Connection. It is recommended to connect to GND.
Maximum Charge Current Setting and Prohibiting Charging Control
Pin. Connect a resistor between IREF and GND pins to set the
maximum charge current according to the following formula:
24000
ICHG
=
mA
(
)
ICHG ≤ 400mA:
RIREF
20500
RIREF
4
6
IREF
I/O
ICHG
=
+58 mA
(
)
ICHG > 400mA:
where RIREF is in kΩ. The resistor should be placed as close to this pin
as possible. When disabled, VIREF = 0V. When this pin is pulled higher
than 1.6V, the charging function is prohibited.
Charge Voltage Setting and EDLC Capacitor Intermediate Voltage
Balance Pin. When the battery is charging and VBAT > 2.0V, it starts to
detect the external connection of this pin.
Take SGM40560-4.3 for example: When the pin is ground level, the
maximum charge voltage is set to 4.3V. When the pin is BAT level, the
maximum charge voltage is set to 4.356V. When the pin is floating or
near to the half of BAT level, the maximum charge voltage is set to
5.363V, and this pin is transformed into the half of BAT level. When the
voltage of F pin deviates from 50% × VBAT, it starts to source current or
sink current to make a regulation.
5
7
F
I/O
Charger Output Pin. Connect the pin to the battery or battery & load. It
is recommended to connect a 1μF (or larger value) X5R ceramic
capacitor.
6
8
BAT
P
Exposed Pad. Exposed pad is internally connected to GND. Connect it
to a large ground plane to maximize thermal performance. It is not
intended as an electrical connection point.
Exposed Pad
Exposed Pad
GND
IC
NOTE: 1. I = Input, O = Output, IO = Input/Output, G = Ground, P = Power for the Circuit, IC= Reserving for Internal Connection,
NC = Not Connect.
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
4
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
ELECTRICAL CHARACTERISTICS
(VIN = 5V, VBAT = 3.3V, F = GND, RIREF = 120kΩ, nCHG float, TJ = +25℃, unless otherwise noted.)
PARAMETER
Static Characteristics
Supply Voltage Range
Charge Current Range
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
2.7
5
7.5
V
700
mA
Maximum Output Current at Output
Voltage Fold-Back Holding State (1)
Working Current at Output Voltage
Fold-Back Holding State
IP
VIN - VBAT = 1V, RIREF = 13kΩ
700
mA
IOPF
IOPN
IBAT = 0mA, average GND current
72
110
135
μA
μA
Current at Stable Charging State
RIREF = 600kΩ, average GND current
100
VIN is connected to 5V through a 10kΩ resistor,
average GND current
Current at Diode Charging State
IOPD
15
μA
BAT Leakage Current without Input
VIN Current when Disable
IRB
VIN float, VBAT = 5.5V
0.08
7.5
μA
μA
IP_DIS
VIREF = 2V, average VIN current
10
BAT Leakage Current when
Disable
ISD
VIREF = 2V, average BAT current
0.2
μA
Charging and Output Voltage Fold-Back Holding Characteristics
SGM40560-3.65
SGM40560-4.05
SGM40560-4.2
SGM40560-4.3
SGM40560-4.4
SGM40560-3.65
SGM40560-4.05
SGM40560-4.2
SGM40560-4.3
SGM40560-4.4
SGM40560-3.65
SGM40560-4.05
SGM40560-4.2
SGM40560-4.3
SGM40560-4.4
3.623
4.023
4.173
4.273
4.373
3.680
4.079
4.228
4.327
4.437
4.511
5.009
5.199
5.327
5.448
3.65
4.05
3.677
4.077
4.227
4.327
4.427
3.738
4.137
4.286
4.385
4.495
4.583
5.081
5.271
5.399
5.520
VCH
F = GND, IBAT = 20mA
4.2
4.3
4.4
3.709
4.108
4.257
4.356
4.466
4.547
5.045
5.235
5.363
5.484
Maximum Charging Voltage
+1.5%VCH F = BAT, IBAT = 20mA
V
F is floating or connected to the
+25%VCH half level of BAT,
IN = 6V, IBAT = 20mA
V
Pre-charge voltage and maximum charge voltage
ratio
Pre-Charge Voltage
VRPR
VRRDC
VRDCC
VRFB
56.5
1.2
60
2
64.5
2.7
%
%
%
%
%
Resistance compensation voltage and maximum
charging voltage ratio
Resistance Compensation Voltage
Resistance Compensation Voltage
Detection Threshold
Resistance compensation voltage detection
threshold and maximum charging voltage ratio
0.3
2.2
96
4.0
Output voltage fold-back holding and maximum
charging voltage ratio
Output Voltage Fold-Back Holding
95.4
97
96.7
Full-Charge Voltage Detection
Threshold
Full-charge voltage detection threshold and
maximum charging voltage ratio
VRCC
98.5
RIREF = 120kΩ
RIREF = 600kΩ
178
34
200
40
222
46
Maximum Charging Current
ICHG
mA
%
Charge termination current and maximum charge
current ratio
End of Charge Current
Pre-Charge Current
IEOC
15
20
25
14
Pre-charge current and maximum charge current
ratio
IPR
2.5
7.5
44
%
Floating Time of Full-Charge
Voltage Detection
tFLTING
min
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
5
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 5V, VBAT = 3.3V, F = GND, RIREF = 120kΩ, nCHG float, TJ = +25℃, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
Input and Output Voltage Comparison Conditions
Rising Threshold
Falling Threshold
VDH
VDL
310
25
400
mV
mV
8
Input Current of Entering the
Diode Charge
Input Current of Exiting the Diode
Charge
IDL
IDH
VIN = VBAT + VDL
VIN = VBAT + VDH
20
mA
mA
1.8
Chip Temperature Regulation of Charging Current
Temperature Regulation
TC
130
℃
Threshold of Charge Current
Control and I/O Characteristics: nCHG Indication Driving
VnCHG = 0.5V
1.6
2.2
2.5
4.0
3.5
5.6
nCHG Low-Level Sink Current
ISNKL
ILKG
mA
VnCHG = 12V
VnCHG = 12V, VIREF = 5.5V
nCHG High-Impedance Leakage
Current
0.01
1
μA
Charging Indicates Low-Level
Voltage Time
tON
tC
160
1280
51.2
ms
ms
s
Charging Indication Period
Continuous Low-Level Voltage
Time
tEOC
Control and I/O Characteristics: IREF Disables Charging Input
VTIREF
1.4
1.5
1.6
V
Control and I/O Characteristics: Equalization Driving
Equalization Drive Voltage
V05R
F float, VBAT = 5.4V
VBAT = 5.4V
2.57
2.70
2.77
2.83
2.83
V
V
Threshold Voltage of Equalization
Drive Sink Current
VSINKF
Threshold Voltage Hysteresis of
Equalization Drive Sink Current
Threshold Voltage of Equalization
Drive Source Current
Threshold Voltage Hysteresis of
Equalization Drive Source Current
Equalization Sinking Drive Current
Capability
Equalization Sourcing Drive
Current Capability
Detecting the GND Threshold
Voltage
VSINKFHYS VBAT = 5.4V
VSOFURCE VBAT = 5.4V
VSOFURCEHYS VBAT = 5.4V
2.74
2.66
2.63
60
V
V
2.57
V
ISINKF
ISOURCEF
VLF
VBAT = 5.4V, VF = 2.9V
mA
mA
V
VBAT = 5.4V, VF = 2.5V
VBAT = 5.4V
55
0.52
0.48
0.6
Detecting the GND Threshold
Voltage Hysteresis
VLFHYS
VBAT = 5.4V
0.35
V
80% × 83.6%
VBAT × VBAT
Detecting BAT Threshold Voltage
VHF
VBAT = 5.4V
VBAT = 5.4V
V
V
Detecting BAT Threshold Voltage
Hysteresis
76.4% × 79% ×
VBAT VBAT
VHFHYS
NOTE:
1. This current is measured when the BAT voltage drops to 90% × VCH
.
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
6
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 5V, F = GND, RIREF = 120kΩ, TJ = +25℃, unless otherwise noted.
5mA Charging Current Distribution
40mA Charging Current Distribution
18000 Samples
24
18
12
6
24
18
12
6
18000 Samples
VBAT = 95% × VCH
RIREF = 4.8MΩ
VBAT = 95% × VCH
RIREF = 600kΩ
0
0
Programmed Charge Current (mA)
80mACharging Current Distribution
18000 Samples
Programmed Charge Current (mA)
200mACharging Current Distribution
16
12
8
24
18
12
6
18000 Samples
VBAT = 95% × VCH
RIREF = 120kΩ
VBAT = 95% × VCH
RIREF = 300kΩ
4
0
0
Programmed Charge Current (mA)
Programmed Charge Current (mA)
400mACharging Current Distribution
Charging Voltage vs. Temperature
Charge Current = 20mA
24
18
12
6
4.215
18000 Samples
VBAT = 95% × VCH
RIREF = 60kΩ
4.210
4.205
4.200
4.195
4.190
4.185
4.180
V
IN = VCH + 1.5V
0
-20
-5
10
25
40
55
Temperature (℃)
Programmed Charge Current (mA)
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
7
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, F = GND, RIREF = 120kΩ, TJ = +25℃, unless otherwise noted.
Charging Voltage vs. Temperature
nCHG Sink Current vs. nCHG Voltage
4.5
4.0
3.5
3.0
2.5
2.0
1.5
5.380
5.376
5.372
5.368
5.364
5.360
5.356
5.352
VIN = 6V
Charge Current = 20mA
F Floating
-50 -25
0
25
50
75 100 125 150
0
2
4
6
8
10
12
VnCHG (V)
Temperature (℃)
180mACharging I-V
Dropout Voltage vs. Charge Current
1.2
1
4.5
4.3
4.1
3.9
3.7
3.5
200
160
120
80
Charge Current
0.8
0.6
0.4
0.2
0
+55℃
+25℃
Battery Voltage
40
RIREF = 133kΩ
2 2.4 2.8 3.2
ICHG falls 10%
0
0
0.4 0.8 1.2 1.6
0
100 200 300 400 500 600 700 800
Charge Current (mA)
Time (Hours)
IN Power-Up/Power-Down Curves
IN Power-Up/Power-Down Curves
VBAT = 3.9V
VBAT = 2V
VIN
VIN
VnCHG
IBAT
IBAT
SGM40560-4.2
Time (50ms/div)
SGM40560-4.2
Time (1s/div)
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
8
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, F = GND, RIREF = 120kΩ, TJ = +25℃, unless otherwise noted.
Input Current and Battery Current Waveform
30V Surge Test Voltage and Current Waveform
when Series 10kΩ Resistor to VIN
VBAT = 3.9V
VIN
IVIN
IBAT
VIN
IVIN
SGM40560-4.2
Time (500ms/div)
Time (50μs/div)
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
9
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
FUNCTIONAL BLOCK DIAGRAM
VIN
BAT
+
VOS
BAT
-
VREF
UVLO
+
Pre
VIN
Enable
Reg
+
_
VCC
VREF
Charge
Control
IREF
F
VCC
Die
Temp
+
_
BAT
_
130℃
+
50% × VBAT
GND
nCHG
Figure 2. Block Diagram
nCHG DRIVING TIMING DIAGRAM
VIN - VBAT > VDH
VIN
tC
IBAT
< 20% × ICHG
or floating time-out
tON
tEOC
InCHG
(High: sinking)
Figure 3. nCHG Driving Timing Diagram
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
10
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
CHARGING CYCLE SCHEMATIC DIAGRAM
> 97.8%×VCH
Resistive Voltage Drop
VCH
96%×98.5%×VCH
ICHG
ICHG
VBAT
Floating Charge Timeout
20%×ICHG
60%×VCH
7.5%×ICHG
Pre-Charge
Constant-Current
Constant-Voltage
Full-Charge
Recharge
Figure 4. Charge Profile (Resistive Voltage Drop＜2.2% × VCH
)
< 97.8%×VCH
Resistive Voltage Drop
102%×VCH
VCH
96%×98.5%×VCH
ICHG
ICHG
Floating Charge Timeout
20%×ICHG
VBAT
60%×VCH
7.5%×ICHG
Resistive Voltage Drop
Compensation
Pre-Charge
Constant-Current
Constant-Voltage
Full-Charge
Recharge
Figure 5. Charge Profile (Resistive Voltage Drop > 2.2% × VCH
)
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
11
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
DETAILED DESCRIPTION
The SGM40560 charging process is designed to improve the
small battery application based on the traditional constant-
current and constant-voltage charging process. It can satisfy
the requirement of current accuracy for small capacity battery.
Besides, it is also suitable for external power supply which is
continuous but unstable, and it can support fast charge safely
with continuous load. Therefore, it can cooperate with
low-cost loose coupling coils to achieve wireless charging,
and it can employ solar cells to supplement power.
between input and output is lower than VDL, the power
transistor is disconnected and the diode is charging the
battery again. The current charged by the diode is determined
by the input and output voltage difference. The charge current
of the power transistor is set by the RIREF. When the diode is
charging, the SGM40560 has a low quiescent current (about
15μA), which is very suitable for a weak energy supply
system like a solar cell.
When it is detected that the output voltage reaches 98.5% of
the maximum charging voltage, the power transistor charging
with the constant-voltage function is forced, which can
prevent the battery from being overcharged.
The SGM40560 has the functions of pre-charge, fast-charge,
trickle floating charge, voltage fold-back holding, resistive
voltage drop compensation, recharge and so on. The
maximum charging current ICHG is set with the external resistor
RIREF. When the output voltage is lower than 60% of the
maximum charging voltage, 7.5% × ICHG current is used for
pre-charge. Then fast-charge with the set value ICHG until
the output voltage is greater than 98.5% of the maximum
charging voltage and exceeds 44 minutes, or after the
charging current is less than 20% × ICHG (this condition is
used as the full-charge judgment condition). After that, it
goes into output voltage fold-back holding state of the
constant-voltage function, and this voltage is lower than 4%
of the maximum charging voltage. After the output voltage
fold-back holding function is completed, if the output voltage
drops more than 2.2% of the maximum charging voltage, the
resistive voltage drop compensation is performed, and the
output voltage is further increased by 2%. If the drop is less
than 2.2% of the maximum charging voltage, the output
voltage is maintained. When the output voltage continues to
reduce more than 1.5%, the voltage fold-back holding state
is exited, and a charging process is restarted.
When the SGM40560 starts charging, it will be charged with
the set ICHG for a certain time, about 20ms, using to activate
the battery. The SGM40560 has internal UVLO function, and
the threshold voltage is 2.4V, the hysteresis is 200mV.
However, when the input voltage is lower than 2.2V, it will not
stop charging immediately, but wait for an indication period to
operate, which can maintain the stability of the charging
current effectively.
The SGM40560 relies on great thermal contact and heat
dissipation with the board. When the temperature of the
device is higher than +130℃, the charging current is actively
reduced to prevent overheating damage. With the small
device, the heat dissipation capability of the device and the
degree of heat tolerance of the specific application scenario
will determine the maximum power dissipation of the
SGM40560.
The design choice of charging current requires a combination
of battery capacity and load characteristics of the input supply.
The maximum charging voltage needs to be selected with
reference to the voltage specification of the battery or mass
capacitor. Determine the connection of pin F according to the
selection. The relationship between the connection of F and
the maximum charging voltage can be found in the Device
Selection Table section.
When F is floating and the full-charge judgment condition is
satisfied, the output voltage fold-back holding state does not
start, and the maximum charging voltage is maintained as the
output.
The SGM40560 charges the battery in two paths, one is the
power transistor and the other is the Schottky diode. When
power-on, the diode is preferred to charge the battery. When
the dropout voltage between input and output is greater than
When F is floating or close to the half of the BAT voltage, the
output is the half of the BAT. When it deviates from 50% ×
V
BAT, it has a source/sink current capability of about 55mA.
VDH, the diode is disconnected, switching to the power
transistor to charge the battery. When the dropout voltage
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
12
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
DETAILED DESCRIPTION (continued)
Motion Design after Full-Charge
Small Capacity Battery Charging
If the external power supply exists after charging, the
SGM40560 will change to maintain the output voltage in the
voltage fold-back holding state, and release the
constant-current limitation and supply the load system
continuously. The output voltage at voltage fold-back holding
state is lower than 4% of the maximum charging voltage, and
maintaining at voltage fold-back holding state does not affect
the cycle life of the battery. This design avoids the rapid aging
caused by the highest voltage for a long time and the normal
aging of continuous alternating charge and discharge, which
also maintains the battery close to the saturation capacity.
For small-capacity batteries (such as EDLC capacitors), the
charging current is small, and the load current accounts for a
large proportion of the charging current. After entering the
floating charge, there is still a large charging current, which
will cause a voltage drop in the equivalent series resistance of
the charging path, leading to the battery terminal voltage to
be lower than the BAT pin voltage. The SGM40560
automatically detects this resistive voltage drop. If the
resistive voltage drop exceeds 2.2%, the maximum charge
voltage will be increased accordingly.
From the Figure 1, the charging current of the SGM40560 is
set by the resistor RIREF. If it needs to externally control the
charging current, refer to Figure 6, use the controller's IO to
generate two different current settings (such as the left circuit),
or use PWM to synthesize a voltage applied to one end of the
current setting resistor for detailed control.
When the external power supply cannot maintain the holding
voltage, the output voltage is lower than 98.5% of the holding
voltage or more than one indication period occurs, exit the
voltage fold-back holding state and restart the charging
process.
RE
RE
RI
Resistive Voltage Drop Compensation
After the SGM40560 detects that the full-charge judgment
condition is met, the device stops charging and check the
output voltage change. If the output voltage does not drop
2.2%, the judgment of the full state will be maintained, and
the output will be maintained by the fold-back holding voltage,
otherwise, the compensation will be started, the output
voltage will be increased by about 2%, recharge again as the
maximum charging voltage. The voltage drop is only detected
for a certain period of time, and is only compensated once,
and finally the output is maintained with the fold-back holding
voltage.
IO
IREF
IO
IREF
RI SGM40560
CPWM
SGM40560
Figure 6a
Figure 6b
Figure 6. Two Ways to Control the Charging Current
For Figure 6a formula:
V
1
1
IO
I
= 1.185×
+
−
× 20250 mA
(
)
ICHG ≤ 400mA:
CHG
RE RI
RE
1
V
1
IO
I
= 1.185×
+
−
×17300 + 58 mA
(
)
ICHG > 400mA:
CHG
RE RI
RE
Loose Coupling Charging
The SGM40560 is designed to charge when the input voltage
is slightly above the battery voltage and close to its highest
withstand voltage, and it does not require constant and stable
supply of current and voltage. When using a power supply
with limited output capability, the IREF pin can be connected
to GND, so that the SGM40560 is in a saturated conduction
state during charging operation, maximizing the power supply
capability and the current passing capability of the
SGM40560. This saturation conduction state still has the
function of preventing overcharging of the battery, that is,
after approaching the maximum charging voltage of 98.5%, it
enters constant-voltage charging.
For Figure 6b formula:
1.185 − VIO ×D
RE + RI
I
=
× 20250 mA
(
)
ICHG ≤ 400mA:
CHG
1.185 − VIO ×D
RE + RI
I
=
×17300+58 mA
(
)
ICHG > 400mA:
CHG
D is IO signal duty ratio. RE and RI are kΩ.
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
13
Small Capacity Compact Battery Charger for
SGM40560
Loosely Coupled Wireless Charging/Solar Charging
DETAILED DESCRIPTION (continued)
Battery Types for Different Voltages
After selecting the different suffix models, the SGM40560
Parallel Expansion of Charging Current
and Saturation Conduction Charging
Using multiple SGM40560s in parallel can increase the
further selects different voltage trimming ranges through
different connections to the F pin, which can adapt to the
charging voltage of most common batteries. The full output
voltage fold-back holding further ensures safety and
long-term efficiency.
charging
arrangements increase the heat dissipation area. When
connected in parallel, each chip is configured with RIREF
current.
Multiple
SGM40560
dispersion
.
Select any one of the chips to configure the RIREF to be
slightly smaller. The charging current will be slightly larger
than other chips (take a small 9% as an example, the
charging current is 10% larger), then the chip is detected
lagging behind the other chips, so the nCHG of the chip can
be used as a global indication output.
The SGM40560 is designed to charge the battery string and
equalize the voltage across the battery when used in a
two-series application of a lower single-voltage lithium
titanate battery and an EDLC capacitor. Equilibrium is only
performed during the charging process, after reaching
equilibrium, the current consumption of the battery is about
4μA. The equalization circuit does not consume power when
there is no charging power.
When a source of limited power is used to charge a battery
with a larger capacity relative to the source, the current
supply capability of the source tends to be lower than the safe
charging current of the battery. For example, a solar panel
with a maximum power of 5W-10 strings has a maximum
output capacity of 1.2A-4V, and a safe current of less than
1.8Ah in 0.7C. At this time, the charging current is set
according to the safe current of the battery. During the
constant-current charging, the SGM40560 will be in a
saturated conduction state, and the SGM40560 will start to
control the charging current only when the battery voltage is
near full. The charging current in this state is limited by the
source's own capability. The consumption of the SGM40560
insertion is determined by its on-resistance, which can
effectively utilize the source's capability.
The nickel-hydrogen battery allows the self-discharge to
increase when the floating voltage is increased, and the
floating charge achieves a voltage balance by self-discharge.
The SGM40560 does not have the ability to balance Ni-MH
battery strings. When charging Ni-MH batteries, select a
suitable voltage type suffix according to the voltage of 2 or 3
series connected and use F pin to connect and fine-tune.
Light Indicator Load Design
Referring to the schematic diagram of the portion of Figure 3,
the SGM40560 outputs (sinks) a constant-current with a duty
ratio of 1/8 during charging, and continuously outputs 40
indication periods after being fully charged. With its 2.3mA
constant-current output, it can adapt to the weak external
power supply. When using IO to read the charge state, the
capacitor can be directly connected in parallel with nCHG,
and the capacitor can be kept in the output state during the
period when nCHG is not driven (high impedance), which is
convenient for reading.
Matching Energy Storage Capacitors to
Improve the Impact of Sudden Load
The constant-voltage/constant-current control capability of
the SGM40560 can be used to isolate the impact of sudden
load on small-capacity batteries or fragile power systems,
such as isolated NB-IoT and GPRS transmission bursts to
prevent system power failure. When the load is burst, it is
powered by the storage capacitor. The charging voltage of
the SGM40560 is set to a higher voltage that the system can
withstand, and the charging current is set to a level suitable
for the power supply characteristics.
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (OCTOBER 2022) to REV.A
Page
Changed from product preview to production data.............................................................................................................................................All
SG Micro Corp
www.sg-micro.com
OCTOBER 2022
14
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
TDFN-2×2-6AL
D
e
N6
L
D1
E1
E
N3
N1
b
BOTTOM VIEW
TOP VIEW
1.60
0.55
1.00
2.60
A
A1
A2
SIDE VIEW
0.30
0.65
RECOMMENDED LAND PATTERN (Unit: mm)
Dimensions
In Millimeters
Dimensions
In Inches
Symbol
MIN
MAX
0.800
0.050
MIN
MAX
0.031
0.002
A
A1
A2
D
0.700
0.000
0.028
0.000
0.203 REF
0.008 REF
1.900
1.500
1.900
0.900
0.250
2.100
1.700
2.100
1.100
0.350
0.075
0.059
0.075
0.035
0.010
0.083
0.067
0.083
0.043
0.014
D1
E
E1
b
e
0.650 BSC
0.026 BSC
L
0.174
0.326
0.007
0.013
NOTE: This drawing is subject to change without notice.
SG Micro Corp
TX00132.000
www.sg-micro.com
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
SOIC-8 (Exposed Pad)
3.302
D
e
E1
E
2.413 5.56
E2
1.91
b
D1
1.27
0.61
RECOMMENDED LAND PATTERN (Unit: mm)
L
A
A1
c
θ
A2
Dimensions
In Millimeters
Dimensions
In Inches
Symbol
MIN
MAX
MIN
MAX
0.067
0.004
0.061
0.020
0.010
0.201
0.134
0.157
0.244
0.099
A
A1
A2
b
1.700
0.100
1.550
0.510
0.250
5.100
3.402
4.000
6.200
2.513
0.000
1.350
0.330
0.170
4.700
3.202
3.800
5.800
2.313
0.000
0.053
0.013
0.007
0.185
0.126
0.150
0.228
0.091
c
D
D1
E
E1
E2
e
1.27 BSC
0.050 BSC
L
0.400
0°
1.270
8°
0.016
0°
0.050
8°
θ
NOTES:
1. Body dimensions do not include mode flash or protrusion.
2. This drawing is subject to change without notice.
SG Micro Corp
TX00013.000
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-2×2-6AL
7″
9.5
2.30
6.40
2.30
5.40
1.10
2.10
4.0
4.0
4.0
8.0
2.0
2.0
8.0
Q1
Q1
SOIC-8
(Exposed Pad)
13″
12.4
12.0
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
7″ (Option)
368
442
386
227
410
280
224
224
370
8
18
5
7″
13″
SG Micro Corp
www.sg-micro.com
TX20000.000
相关型号：
©2020 ICPDF网 联系我们和版权申明