Catalog excerpts
Battery Charging and Management Solutions High Performance Analog ICs
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Linear Technology’s high performance battery charging and management ICs enable long battery life and run time, while providing precision charging control, constant status monitoring and stringent battery protection. Our proprietary design techniques seamlessly manage multiple input sources while providing small solution footprints, faster charging and 100% standalone operation. Battery and circuit protection features enable improved thermal performance and high reliability operation. Each battery chemistry has unique charging requirements. Selecting the correct battery charger increases...
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BATTERY CHARGING AND MANAGEMENT SOLUTIONS BATTERY CHEMISTRY Power Management Integrated Circuits (PMICs) with Integrated Chargers
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Wireless Power Receiver & Buck Battery Charger LTC4120 The LTC4120, a high performance wireless receiver and battery charger, serves as the central component of the receiver electronics in a wireless battery charging system. The Linear Technology wireless power system is designed to transmit up to 2W to a battery with a maximum charge current of 400mA. The programmable float voltage of the device accommodates several battery chemistries and configurations. The IC utilizes a patented dynamic harmonization control (DHC) technique that enables high efficiency contactless charging with maximum...
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BATTERY CHARGING SOLUTIONS Wireless Power Transfer (WPT) An inductive wireless power system consists of transmitter electronics, transmit coil, receive coil and receiver electronics. The LTC4120-based resonant coupled system uses dynamic harmonization control (DHC) to optimize power transfer and provide overvoltage protection. This eliminates the need for precise mechanical alignment between the transmit and receive coils as well as the need for a coupling core. The LTC4120 wireless buck charger forms the basis for the receiver electronics. The receive coil can be integrated into the...
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4 BATTERY CHARGING SOLUTIONS Lithium-Ion/Polymer I LiFePO4 Multichemistry 7.5V to 32V Single Cell 4A Charger Package (mmxmm) Switch Mode Multi-Chemistry Buck (Step-Down) Battery Chargers Switch Mode Li-Ion Buck Battery Chargers Li-Ion Li-Ion Li-Ion Li-Ion Li-Ion Li-Ion Li-Ion Li-Ion Timer External pC or LTC1729 Timer or C/10 Timer or C/10 External pC or LTC1729 External pC or LTC1729 External pC External pC External pC External pC External pC Timer, C/X External pC Timer Timer + C/10 Timer + C/10 Timer + C/10 Timer + C/10 Timer Timer Timer SLA, LiFePO4 Li-Ion NiMH NiCd SLA Li-Ion NiMH...
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n/Polymer LiFePO4 Multichemistry 5 BATTERY CHARGING SOLUTIONS Our buck-boost battery chargers seamlessly charge a battery as Its voltage varies below, above or equal to the Input voltage. LTC4020: 55V Buck-Boost Multi-Chemistry Battery Charger with Maximum Power Point Control (MPPC) Features • Wide Voltage Range: 4.5V to 55V Input, Up to 55V Output (60V Absolute Maximums) • Synchronous Buck-Boost DC/DC Controller • Li-Ion and Lead-Acid Charge Algorithms • ±0.5% Float Voltage Accuracy • ±5% Charge Current Accuracy • Instant-On for Heavily Discharged Batteries • Ideal Diode Controller...
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Solar Battery Charging ICs intermittent power generation nature of solar panels. However, solar panels are non-ideal Figure 1 Solar Panel I-V Curve Showing Maximum Power power sources, and the operating point at which maximum power is generated depends on many factors such as incident light (including any partial shading), temperature and panel aging. When discussing solar panels and power, terms such as maximum power point tracking (MPPT) and maximum power point control (MPPC) are often used. As can be seen in Figure 1, the output current of a solar panel varies nonlinearly with the panel...
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An intermediate approach is something that Linear Technology calls maximum power point control (MPPC). This technique takes advantage of the fact that the maximum power voltage (VMP) of a solar panel does not, typically, vary much as the amount of Figure 2 Partially Shaded Solar Panel Showing Multiple Power Maxima Partially Shaded 72-Cell 180W Panel incident light changes (see "Solar Battery Charger Maintains High Efficiency in Low 7 Light" for more information). Therefore, a simple circuit can force the panel to operate at measure the panel voltage and if the input voltage falls below the...
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Package (mmxmm) Linear Multi-Chemistry Solar Battery Chargers Shunt Solar Battery Chargers LTC4070 50mA 2.7V to 4.2V Li-Ion Depends on external components A Dlfferentlal voltage regulatlon AA 500mA wlth exter
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LTC4020 - 55V Buck-Boost Multi-Chemistry Battery Charger with Maximum Power Point Control (MPPC) Features • Wide Voltage Range: 4.5V to 55V Input, Up to 55V Output (60V Absolute Maximums) Applications • Solar-Powered Systems Synchronous Buck-Boost DC/DC Controller Portable Industrial and Medical Equipment Li-Ion and Lead-Acid Charge Algorithms Military Communications Equipment Input Voltage Regulation for High Impedance Input Supplies and Solar Panel Peak Power Operation 12V to 24V Embedded Automotive Systems ±0.5% Float Voltage Accuracy ±5% Charge Current Accuracy Instant-On for Heavily...
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The Power and Flexibility of the LTC4000 / LTC4000-1 The LTC4000 is a high voltage controller and power manager which, when paired with an externally compensated DC/DC converter, becomes a full-featured battery charger solution. The LTC4000 is capable of driving virtually any topology, including buck, boost, buck-boost, SEPIC and flyback converters. Its intelligent PowerPath manager provides power to the system load when input power is available, enabling instant-on operation even with a deeply discharged battery. A full-featured controller, the LTC4000 can charge a variety of battery types...
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LTC4000, LTC4000-1 Paired with Example Companion Switching Regulators 15V to 60V Buck 10A Charger for 3-Cell LiFePO4 12V to 21V Boost 10A Charger for 24V Lead-Acid VOUT BUCK CONTROLLER BOOST CONTROLLER 18V to 72V Flyback 2A Charger for 1-Cell Li-Ion FLYBACK CONTROLLER BUCK BOOST CONTROLLER Lab-Tested LTC4000 Applications Buck-Boost Active Clamp Forward
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