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LT1511ISWPBF, LT1511SW, LT1512

Table of contents:
Info of LT1511ISWPBF
Info of LT1511SW
Info of LT1512

LT1511ISWPBF, LT1511SW, LT1512 Selling Leads, Datasheet

MFG:LT Package Cooled:SMD D/C:09+

LT1511ISWPBF, LT1511SW, LT1512 Datasheet download

Five Points

Part Number: LT1511ISWPBF

MFG: LT

Package Cooled: SMD

D/C: 09+

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LT1512 General Description

The LT^®1512 is a 500kHz current mode switching regula-tor specially configured to create a constant-current/constant-voltage battery charger. In addition to the usualvoltage feedback node, it has a current sense feedbackcircuit for accurately controlling output current of a flybackor SEPIC (Single-Ended Primary Inductance Converter)topology charger. These topologies allow the currentsense circuit to be ground referred and completely sepa-rated from the battery itself, simplifying battery switchingand system grounding problems. In addition, these to-pologies allow charging even when the input voltage islower than the battery voltage.

Maximum switch current on the LT1512 is 1.5A. Thisallows battery charging currents up to 1A for a singlelithium-ion cell. Accuracy of 1% in constant-voltage modeis perfect for lithium battery applications. Charging cur-rent can be easily programmed for all battery types.

LT1512 Maximum Ratings

Input Voltage .......................................................... 30V
Switch Voltage ........................................................ 40V
S/S Pin Voltage ....................................................... 30V
FB Pin Voltage (Transient, 10ms) ......................... ±10V
VFB Pin Current .................................................... 10mA
IFB Pin Voltage (Transient, 10ms) ........................ ±10V
Storage Temperature Range .............. 65°C to 150°C
Ambient Temperature Range
LT1512C (Note 3) ...................................... 0°C to 70°C
LT1512I ............................................... 40°C to 85°C
Operating Junction Temperature Range
LT1512C (Note 3) ............................. 20°C to 125°C
LT1512I ............................................. 40°C to 125°C
Short Circuit ............................................ 0°C to 150°C
Lead Temperature (Soldering, 10 sec) ................. 300°C

LT1512 Features

Charger Input Voltage May Be Higher, Equal to orLower Than Battery Voltage
Charges Any Number of Cells Up to 30V*
1% Voltage Accuracy for Rechargeable LithiumBatteries
100mV Current Sense Voltage for High Efficiency
Battery Can Be Directly Grounded
500kHz Switching Frequency MinimizesInductor Size
Charging Current Easily Programmable or Shut Down

LT1512 Typical Application

Battery Charging of NiCd, NiMH, Lead-Acidor Lithium Rechargeable Cells
Precision Current Limited Power Supply
Constant-Voltage/Constant-Current Supply
Transducer Excitation

LT1512 Connection Diagram

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