Linear LTC4002-4.2 Manuals

1 pdf manual(s) Linear LTC4002-4.2 for free download (Document Types: Quick start manual)

Linear LTC4002-4.2 Quick start manual [PDF] (7 pages)

  • Identifier: id-1139033
  • Brand: Linear
  • Device: LTC4002-4.2 Battery Charger
  • Type: PDF
  • Key Aspects: Hardware Verification Checklists, Unpacking and Inspection Guidelines, Emergency Shutdown Procedures
  • UPD Date: 20.07.2026
  • Source File: 1019362.pdf
  • Pages: 7
  • Description: User handbook for the Linear LTC4002-4.2.
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  • QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 551 LITHIUM-ION BATTERY CHARGER WITH CHARGE TERMINATION 2 Typical Demo Board Specifications * Main cause of drain current is due to Schottky diode leakage current. Figure 1. Test Setup Test Equipment Required for Demo Board Evaluation Input Voltage Range (VIN) 5.2V to 24V Charge Voltage (VBAT) (constant voltage mode) 4.2V ±1% Charge Current IBAT (constant current mode) 3A ±8% Charge Current IBAT (trickle curren
  • QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 551 LITHIUM-ION BATTERY CHARGER WITH CHARGE TERMINATION 3 *Battery Simulator consists of; Battery Simulator A battery simulator can be very useful for evaluating a battery charger. A simple battery simulator consists of a lab power supply with coarse and fine (or a multi-turn) voltage adjust controls and a power resistor connected to the power supply output terminals. With the resistor load connected, the power
  • QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 551 LITHIUM-ION BATTERY CHARGER WITH CHARGE TERMINATION 4 turns off, it remains off until a new battery is installed, the input power is cycled, or the charger is momentarily shut down). Continue increasing the battery simulator power supply until the charge current drops to approximately 300mA (30mV on the charge current DVM), then read the charger output voltage on the DVM. This reading is the charger float vol
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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 551 LITHIUM-ION BATTERY CHARGER WITH CHARGE TERMINATION 1 LTC4002-4.2 DESCRIPTION Demonstration circuit 551 is a complete constant- current/constant- voltage battery charger designed to charge one Lithium-Ion cell. Programmed for 3A charge current, this board features a 500kHz step down switching regulator controller driving a P- channel MOSFET. A fixed 3 hour timer is included for charge termination in addition to a charge status LED to indicate a near-full-charge condition and a thermistor connection for battery temperature charge qualification. Because of the heat generated by the circuit, the thermistor must not be mounted on this board. A 10k resistor (R3) is used instead of a thermistor on this board. The LTC ®4002 on this board is in a tiny 3 X 3 mm 10 pin DFN package. All surface mount components are used to minimize board space and height with the circuitry occupying approximately 0.5 square inches of board space although additional pc-board copper is needed for heat dissipation. Design files for this circuit board are available. Call the LTC factory. LTC is a registered trademark of Linear Technology Corporation Other Features include: • Preset float voltages of 4.2V ±1% • 3A Constant Current (can be programmed for other charge currents) • 3 Hour charge termination timer • NTC Thermistor input for sensing battery temperature • Undervoltage Lockout • Manual Shutdown • Low battery drain current when input supply is removed • C/10 Trickle charge for deeply discharged batteries • Auto recharge when battery voltage drops below preset threshold • C/5 Charge LED indicator (CHRG)

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