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LM3621

Features: Automatic end-of-charge control Preset or user adjustable charge current regulationLED drivers for charging status and fault indication Battery self-discharge refresh (maintenance) Overvoltage/overcurrent fault detection and protection Defective battery pack detection Charge current boo...

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SeekIC No. : 004395399 Detail

LM3621: Features: Automatic end-of-charge control Preset or user adjustable charge current regulationLED drivers for charging status and fault indication Battery self-discharge refresh (maintenance) Overvo...

LM3621 Data Sheet

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Part Number:
LM3621
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/26

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Product Details

Description



Features:

Automatic end-of-charge control
Preset or user adjustable charge current regulation
LED drivers for charging status and fault indication
Battery self-discharge refresh (maintenance)
Overvoltage/overcurrent fault detection and protection
Defective battery pack detection
Charge current boost control for cellular phone applications
Charge interruption control input


Application

coke or graphite anode, single cell Lithium-Ion battery packs
Linear voltage regulator controlled chargers
High efficiency switching regulator controlled chargers
Cost effective wall adapter chargers


Pinout

Connection Diagram


Specifications

Supply Voltage, VDD
All pins
Power Dissipation
ESD Susceptibility (Note 2)
Junction Temperature
Storage Temperature
Lead Temperature,
soldering
Vapor Phase (60 sec)
Infrared (15 sec)		 6.0V
−0.3 V £ V £ VDD+0.3V
100 mV
2kV
150°C
−65°C to +150°C

+215°C
+220°C



Description

The LM3621 is a full function constant voltage, constant current (CVCC) lithium-ion (Li+) battery charger controller. It provides 1% regulation accuracy over the specified temperature range without requiring the use of external precision resistors.

The IC controls five charge modes: conditioning, fast, top-off, monitor and maintenance. In addition, the LM3621 detects and flags defective batteries as well as over current and over voltage fault events. The architecture of the IC is based on high gain constant voltage and constant current control loops. The LM3621 is designed to control a switching charger, a linear charger or an off-line ac adapter charger.

The LM3621 consists of a logic controller, precision bandgap reference, wide bandwidth transconductance error amplifiers, comparators, and an output buffer. The LM3621 is available in a 16-pin SOIC package and is specified over the range of 0°C to 70°C.




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