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LT1621 Datasheet

LT1621 Datasheet

Rail-to-Rail Current Sense Amplifier
Part No.: LT1621
Page: 12 Pages
Size: 231 KB
Manufacturer: Linear Technology
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Views: 1
Update Time: 2023-12-05 14:59:56
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LT1621 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LT1621CGN#PBF Tube 100   1 16 0°C ~ 70°C 16-Lead SSOP  
LT1621CGN#TRPBF Reel 2500   1 16 0°C ~ 70°C 16-Lead SSOP  
LT1621CGN#TRMPBF Reel 500   1 16 0°C ~ 70°C 16-Lead SSOP  
LT1621IGN#PBF Tube 100   1 16 -40°C ~ 125°C 16-Lead SSOP  
LT1621IGN#TRPBF Reel 2500   1 16 -40°C ~ 125°C 16-Lead SSOP  
LT1621IGN#TRMPBF Reel 500   1 16 -40°C ~ 125°C 16-Lead SSOP  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LT1621 Datasheet(PDF)

LT1621 Datasheet(Picture)

LT1621 Features

  • 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

LT1621 Applications

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

LT1621 Description

The LT1621 simplifies the design of high performance, controlled current battery charging circuits when used in conjunction with a current mode PWM controller IC.

The LT1621 regulates average output current independent of input and output voltage variations. Output current can be easily adjusted via a programming voltage applied to the LT1621’s PROG pin.

Most current mode PWM controllers have limited output voltage range because of common mode limitations on the current sense inputs. The LT1621 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 LT1621 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.

LT1621 Datasheet Related Parts

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