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AG103 Datasheet(PDF) 9 Page - Silver Telecom 2019

Part No. AG103
Description  Intelligent Sealed Lead Acid Solar Battery Charger
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Manufacturer  SILVERTEL [Silver Telecom 2019]
Direct Link  https://silvertel.com/
Logo SILVERTEL - Silver Telecom 2019

AG103 Datasheet(HTML) 9 Page - Silver Telecom 2019

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V1.2 Sept 2019
Data Sheet
© Silver Telecom 2019
9
Ag103
Sealed Lead Acid Solar Battery Charger Module
Battery
Capacity (Ah)
RCS Resistance
(Ohms)*
Min Input
Voltage (V)
Voltage at the
CS Pin (V)
Bulk Charge Current
Limit (A) ±10%
1.2
1K ±1%
9
0.3
0.3
2
2K ±1%
9
.55
0.5
2.1
3K ±1%
9
.76
0.525
2.3
3K9 ±1%
9
.93
0.575
2.8
4K7 ±1%
9
1.05
0.7
3.2
6K2 ±1%
12
1.26
0.8
4
6K8 ±1%
12
1.30
1
7
7K5 ±1%
12
1.37
1.2
12
9K1 ±1%
12
1.52
1.2
Table 3: Value of RCS
* To prevent damaging the battery it is important that the correct value of RCS is set. If RCS is not fitted, then the Ag103 will default to
1.2Ah capacity.
4.4 Load Enable
The Ag103 can either connect the battery constantly to the load by connecting a 2k
resistor between LE and GND, see Figure 9, or it can be used in a battery back up mode
where the battery is only connected to the load if the internal
μ-controller detects the input
has been disconnected, or the panel voltage has dropped below 9V. This mode is selected
by leaving the LE open circuit, see figure 10.
4.5 Thermal Compensation
The optimum terminal voltage for the charging process is also dependent on battery
temperature.
This is because the electrochemical activity is affected by temperature
changes. Therefore, as the temperature rises, the charging voltage should be reduced to
prevent overcharge. Likewise as the temperature falls, the charge voltage should be
increased to avoid undercharge. In order to maximise the life of the battery the use of
temperature compensation is recommended.
The Ag103 makes this easy to implement with only the addition of a low cost Thermistor.
The Ag103 measures the THERM pin and will automatically adjust the charge profile to
compensate for any changes in battery temperature.
A typical recommended value for TH1 as shown in Figure 6 is a 47K NTC (Negative
Temperature Coefficient) resistor with B25/50 ~4000K. These are inexpensive and readily
available in surface mount or bead format. For correct operation the Thermistor must be in
physical contact with the battery.


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