PDF MC33346 Data sheet ( Hoja de datos )

Número de pieza	MC33346
Descripción	LITHIUM BATTERY PROTECTION CIRCUIT FOR THREE OR FOUR CELL SMART BATTERY PACKS
Fabricantes	Motorola Semiconductors
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No Preview Available ! Order this document from Analog Marketing MC33346 Product Preview Lithium Battery Protection Circuit for Three or Four Cell Battery Packs The MC33346 is a monolithic lithium battery protection circuit that is designed to enhance the useful operating life of three or four cell rechargeable battery packs. Cell protection features consist of independently programmable charge and discharge limits for both voltage and current with a delayed current shutdown, cell voltage balancing with on–chip balancing resistors, and virtually zero current sleepmode state when the cells are discharged. Additional features consists of a six wire microcontroller interface bus that can selectively provide a pulse output that represents the internal reference voltage, cell voltage, cell current and temperature, as well as control the states of four internal balancing and two external MOSFET switches. A microcontroller time reference output is available for gas gauge implementation. This protection circuit requires a minimum number of external components and is targeted for inclusion within the battery pack. The MC33346 is available in standard and low profile 24 lead surface mount packages. LITHIUM BATTERY PROTECTION CIRCUIT FOR THREE OR FOUR CELL SMART BATTERY PACKS 24 1 24 1 DW SUFFIX PLASTIC PACKAGE CASE 751E (SO–24L) DTB SUFFIX PLASTIC PACKAGE CASE 948H (TSSOP–24) • Independently Programmable Charge and Discharge Limits for Both Voltage and Current • Delayed Current Shutdown • Cell Voltage Balancing with On–Chip Resistors • Six Wire Microcontroller Interface Bus • Data Output for Reference, Voltage, Current, and Temperature • Microcontroller Time Reference Output for Gas Gauging • Virtually Zero Current Sleepmode State when Cells are Discharged • Programmable for Three or Four Cell Applications • Minimum External Components for Inclusion within the Battery Pack • Available in Low Profile Surface Mount Packages ORDERING INFORMATION Device Operating Temperature Range Package MC33346DW MC33346DTB TA = –40° to +85°C SO–24L TSSOP–24 Typical Four Cell Smart Battery Pack Cell 4/VCC/ Discharge Current Limit 3 Cell 3 24 Cell 2 23 Cell 1 22 Ground Cell 15 Program 11 Temp 8 Current Sense Common 7 Charge Current Limit 6 Discharge Gate Drive Output 14 MC33346 17 A–to–D Converter Period 18 VC Logic Supply 13 Address Input Charge Charge Gate Drive Gate Drive Output Common 20 21Cell Voltage 2 Discharge Voltage Threshold 4 Charge Voltage Threshold 5 Cell Voltage Return 1 Data Output Ref/V/I/T 16 Reference Clock Output 19 Interrupt Output 12 10 9 Data Charge Gate Input Turn Off/ Test Input This device contains 4760 active transistors. This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice. MOTOROLA ANALOG IC DEVICE DATA © Motorola, Inc. 1996 Issue 1 1 1 page

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