DEMO MANUAL DC103 BATTERY CHARGER LT1511 Constant-Voltage/Constant-Current Lithium-Ion BatteryCharger with Input Current Limiting
●Demonstration board DC103 is a complete Li-Ion battery charger designed for 1-, 2- or 3-cell applications. The LT®1511 is used in a high efficiency current mode step-down topology,capable of providing up to 3A of charging current. The 200kHz switching frequency allows small surface mount components to be used, thus minimizing board space and height. The precision voltage required by Li-Ion batteries is programmed by a resistor divider and the maximum battery charge current is programmed with a single 1/10W resistor (or a programming current from a DAC).
●A unique feature of the LT1511 is its ability to monitor the input current from the power source, provide current to a load and to adjust the battery charging current accordingly, so as not to exceed a predetermined current from the input power source. This allows the input power supply or AC adapter to provide current to power system circuitry and simultaneously charge a battery, without overloading the input power supply. As the system current requirements increase, the LT1511 begins adjusting the battery charging current downward to keep the input power supply current below a predetermined limit.
●Jumpers JP1 and JP2, located on the demo board, are used to select the correct charging voltage for the number of cells being charged (4.2V, 8.4V or 12.6V). Battery charging current is programmed for 3A by resistor R11and the current sense resistors R6, R9 and R15. Maximum input current (or AC adapter current) is set for 3A by current sense resistor R4.
●Also included on this demo board are a soft start function,undervoltage lockout (with an undervoltage lockout signal out) and provisions for driving the supply boost capacitor from an external low DC voltage, rather than from the battery voltage, to increase efficiency and thus reduce heat dissipation.
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LT1511 、 1E106ZY5U-C304F-T 、 THCS50EIE106Z 、 12063G474ZAT2 、 12063G105ZATMA 、 12063G334ZAT2 、 12065A221KAT2A 、 TPSD226K025R0200 、 TPSD106K035R 、 MBRS340LT3 、 MBR0540T 、 1502-2 、 TSW-102-07-G-S 、 TSW-103-07-G-S 、 CTX20-4 、 CR32-5101F-T 、 CR32-302J-T 、 LR2010-01-R033F 、 CR32-511JT 、 CR32-2000F-T 、 PFC-W1206R-03-1643-B 、 PFC-W1206R-03-1153-B 、 CR32-102J-T 、 PFC-W1206R-03-4931-B 、 CR32-3010F-T 、 PFC-W1206R-03-2803-B 、 LT1511CS |
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Constant-Voltage/Constant-Current Lithium-Ion Battery Charger 、 BATTERY CHARGER 、 complete Li-Ion battery charger |
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2017/12/14 |
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382 KB |
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