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LM3647 数据表(PDF) 1 Page - Texas Instruments |
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LM3647 数据表(HTML) 1 Page - Texas Instruments |
1 / 19 page OBSOLETE LM3647 www.ti.com SNOS517H – MARCH 2000 – REVISED APRIL 2013 LM3647 Universal Battery Charger for Li-Ion, Ni-MH and Ni-Cd Batteries Check for Samples: LM3647 1 FEATURES DESCRIPTION The LM3647 is a charge controller for Lithium-Ion (Li- 2 • Auto-Adaptive Fast Charge Ion), Nickel-Metal Hydride (Ni-MH) and Nickel- • High-Resolution, Accurate Voltage Monitoring Cadmium (Ni-Cd) batteries. The device can use Prevents Li-Ion Undercharge or Overcharge either a pulsed-current charging or a constant-current • Fast Charge, Pre-Charge and Maintenance charging technique. The device can also be configured to discharge before charging. Throughout Currents are Provided. Different Currents are the charging sequence the LM3647 monitors voltage Selectable via External Resistors and/or temperature and time in order to terminate • Fast-Charge Termination by Δ Temperature/Δ charging. Time, Maximum Voltage, Maximum Charge Termination Methods are: Temperature, Negative Δ Voltage and Maximum Time • Negative Delta Voltage ( −ΔV) • Optional: Delta Temperature/Delta Time ( ΔT/Δt) • Dynamically Detects Battery Insertion, Removal, Short Circuit and Bad Battery • Backup: Maximum Temperature Without Additional Hardware • Backup: Maximum Time • Supports Charging of Battery Packs with 2–8 • Backup: Maximum Voltage Cells of Ni-Cd/Ni-MH or 1–4 Cells of Li-Ion (1 If both voltage and temperature fail to trigger the Cell of NiCd/NiMH can be Supported by Added termination requirements, then the maximum time External 2x Voltage Amplifier) (configured by external hardware) steps in which • Three Optional LED Indicators and Buzzer terminates the charging. Output Indicate Operational Modes In Ni-Cd/Ni-MH mode, four different charging stages • Ni-MH/Ni-Cd Charge Mode, Li-Ion Charge Mode are used: or Discharge Mode can be Selected Manually • Soft-Start Charge • Supports Control of Current Feedback Power • Fast Charge Supply and Constant Current Power Supply • Topping Charge • Maintenance Charge APPLICATIONS In Li-Ion mode, four different charging stages are • Battery Charging Systems for: used: – Portable Consumer Electronics • Qualification – Audio/Video Equipment • Fast Charge Phase 1, Constant Current – Communications Equipment • Fast Charge Phase 2, Constant Voltage – Point of Sale Devices • Maintenance Charge – Power Tools The charge current of the LM3647 is configured via – Personal Convenience Products external resistors, which in turn controls the duty cycle of the PWM switching control output. For cost- sensitive applications, the LM3647 charge controller cab be configured to use an external current source and no temperature sensor. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2000–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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