LM3621MX National Semiconductor, LM3621MX Datasheet
LM3621MX
Specifications of LM3621MX
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LM3621MX Summary of contents
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... T n Two selectable output voltages (4.2V or 4.1V) Typical Application 1A, 4.1V CVCC Linear Charger for Graphite Anode Lithium-Ion Battery © 2004 National Semiconductor Corporation n Less than 1 µA current drain from fully charged battery n Preconditioning severely discharged cells (0V to 2.55V) Features n Automatic end-of-charge control ...
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Connection Diagram Pin Description Pin No. Symbol BAT 2 V − BAT 3 CSR 4 PFD 5 I COMP 6 MCO 7 V COMP 8 I SET 9 V SET 10 LED1 11 LED2 12 ChgInt 13 ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage −0.3 V ≤ V ≤ V All pins Power Dissipation ESD Susceptibility (Note 2) Junction Temperature Electrical Characteristics V = 4.2V unless otherwise specified. Specifications with standard type face are for T DD apply over full operating temperature range ...
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Electrical Characteristics V = 4.2V unless otherwise specified. Specifications with standard type face are for T DD apply over full operating temperature range. Symbol Parameter I -MM Battery Load Current (Note 9) LKG V Maximum Allowed Battery Self- BSD Discharge(Note ...
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Typical Performance Characteristics Unless otherwise specified 25˚C) A Charge Termination Voltage Change vs V Fast Charge Current Regulation Voltage vs V Fast Charge Current Regulation vs LED1 or LED2 Sink Current Maximum MCO Output Voltage ...
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Typical Performance Characteristics Fast Charge Current Regulation vs MCO Output Current, I OUT www.national.com Unless otherwise specified, T Charger Output Voltage Current Regulation Voltage vs Battery Resistance Free Voltage 10010721 6 = 25˚C) (Continued) A 10010714 ...
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FIGURE 1. LM3621 Simplified Block Diagram 7 10010702 www.national.com ...
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Note 17: State 8 is not used. www.national.com FIGURE 2. LM3621 Charge State Diagram 8 10010703 ...
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FIGURE 3. Typical Charge Cycle Waveform (V 9 10010701 = HI) SET www.national.com ...
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Application Information BATTERY CHARGER OPERATION INFORMATION Figure 4 shows a general battery charger configuration using LM3621. The LM3621 provides all the necessary control functions for charging Lithium-Ion batteries precisely and safely. It features constant voltage and constant current mode operation. ...
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Application Information CHARGE INTERRUPT CONTROL Charging is interrupted with the digital input “ChgInt” pulled low. The PFD pin is pulled to ground turning off the series low pass FET. This is useful to prevent charging a battery if, for example, ...
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Application Information FAULT PROTECTION LM3621 provides redundant fault protection for a Li-Ion bat- tery pack. If the charger’s control loop is accidentally opened, the regulation voltage will begin to increase beyond the level that are safe for the battery. In ...
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FIGURE 7. Charge Current Regulation (V FIGURE 8. Charge Current Detection (V www.national.com 10010709 ) vs I Voltage CSR SET 10010708 ) vs I Voltage CSR SET 14 ...
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... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...