LT1621

Features: n Accurate Output Current Programming Usable in Charging Applications Up to 32V Output Programmable Load Current Monitor for End-of- Charging-Cycle Notification (16-Pin Version) Dual Function IC (LT1621) Allows Convenient Integration of Load and Input Current SensingLevel-Shifted Current...

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SeekIC No. : 004400737 Detail

LT1621: Features: n Accurate Output Current Programming Usable in Charging Applications Up to 32V Output Programmable Load Current Monitor for End-of- Charging-Cycle Notification (16-Pin Version) Dual Funct...

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Part Number:
LT1621
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: 2024/3/27

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Product Details

Description



Features:

n Accurate Output Current Programming
Usable in Charging Applications Up to 32V Output
Programmable Load Current Monitor for End-of- Charging-Cycle Notification (16-Pin Version)
Dual Function IC (LT1621) Allows Convenient Integration of Load and Input Current Sensing
Level-Shifted Current Sense Output for Current Mode PWM Controllers
Can be Used for NiCd, NiMH, Lead-Acid and Lithium- Ion Battery Charging
Greater than 96% Efficiency Possible in Charger Applications
High Output Currents Possible: > 10A Easily Obtained



Application

High Current Battery Chargers
High Output Voltage DC/DC Converters
Constant Current Sources
 Overcurrent Fault Protectors



Pinout

  Connection Diagram


Specifications

Power Supply Voltage: VCC .......................... 0.3V to 7V
Programming Voltage:
PROG, PROG2 ............ 0.3V to VCC + 0.3V (7V Max)
IOUT, SENSE, AVG, AVG2,
MODE Voltage ................ 0.3V to VCC + 0.3V (7V Max)
Sense Amplifier Input Common Mode .......0.3V to 36V
Operating Ambient Temperature Range
Commercial ............................................ 0°C to 70°C
Industrial ............................................ 40°C to 85°C
Storage Temperature Range ................ 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C



Description

The LT 1620 simplifies the design of high performance, controlled current battery charging circuits when used in conjunction with a current mode PWM controller IC. The LT1620 regulates average output current independent of input and output voltage variations.

Output current can be easily adjusted via a programming voltage applied to the LT1620's PROG pin. Most current mode PWM controllers have limited output voltage range because of common mode limitations on the current sense inputs. The LT1620 overcomes this restriction by providing a level-shifted current sense signal, allowing a 0V to 32V output voltage range. The 16-pin version of the LT1620 contains a programmable low charging current flag output.

This output flag can be used to signal when a Li-Ion battery charging cycle is nearing completion. The LT1621 incorporates two fully independent current control circuits for dual loop applications.




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