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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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LP28292 Scheda tecnica(PDF) 1 Page - Lowpower Semiconductor inc |
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LP28292 Scheda tecnica(HTML) 1 Page - Lowpower Semiconductor inc |
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1 / 10 page  Preliminary Datasheet LP28292 LP28292 – 02 Ver. 1.2 Datasheet Nov.-2008 Page 1 of 10 1.5A Single-chip Li-ion and Li-POL Charge with OVP General Description The LP28292 is a complete constant-current/ constant- voltage linear charger for single cell lithium-ion batteries. Its TDFN-10 package and low external component count make the LP28292 ideally suited for portable applications. Furthermore, the LP28292 is specifically designed to work within USB power specifications. Its have a over voltage protection in input with 6.5V and support over zero voltages of battery can charge enable. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be ISET rammed externally with a single resistor. The LP28292 automatically terminates the charge cycle when the charge current drops to 1/10th the ISET rammed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed, the LP28292 automatically enters a low current state, dropping the battery drain current to less than 2µA. The LP28292 can be put into shutdown mode, reducing the supply current to 25µA. Other features include charge current monitor, undervoltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage. Order Information LP28292 - □ □ □ F: Pb-Free Package Type QV: TDFN-10 Applications Portable Media Players/MP3 players Cellular and Smart mobile phone PDA/DSC Bluetooth Applications Features Very Low Power Dissipation Vin Over Voltage Protection:6V Short-circuit protection Programmable Charge Current Up to 1500mA No MOSFET, Sense Resistor or Blocking Diode Required Constant-Current/Constant-Voltage Operation with Thermal Regulation* to Maximize Charge Rate Without Risk of Overheating Charges Single Cell Li-Ion Batteries Directly from USB Port 25µA Supply Current in Shutdown Time Pre-charge Conditioning With Safety Timer Reverse Leakage Protection Prevents Battery Drainage Charge Current Thermal Regulation Status Outputs for LED or System Interface Indicates Charge and Fault Conditions Optional Battery Temperature Monitoring Before and During Charge Automatic Sleep Mode for Low-Power Consumption Available in 3mm × 3mm TDFN-10 Package RoHS Compliant and 100% Lead (Pb)-Free Typical Application Circuit Rset 2K 1uF BT1 BATT 10uF BATTERY VIN LP28292 3 2 4 5 7 8 6 1 9 10 STAT NC NC VSS NC ISET NC VIN NC VOUT ISet=880/Rset Marking Information Please see website. |
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