lithium battery protection circuit for three or four cell smart battery packs dtb suffix plastic package case 948h (tssop24) 24 1 order this document from analog marketing dw suffix plastic package case 751e (so24l) 24 1 1 motorola analog ic device data
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 onchip 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. ? independently programmable charge and discharge limits for both voltage and current ? delayed current shutdown ? cell voltage balancing with onchip 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 t a = 40 to +85 c so24l MC33346DTB t a = 40 to + 85 c tssop24 cell program 18 v c logic supply 17 atod converter period typical four cell smart battery pack this device contains 4760 active transistors. charge gate drive common 21 cell 4/v cc / discharge current limit mc33346 discharge voltage threshold 2 4 5 1 charge voltage threshold cell voltage return cell voltage 9 charge gate turn off/ test input 3 cell 3 24 cell 2 23 cell 1 22 ground temp 8 19 reference clock output 11 15 16 data output ref/v/i/t 12 interrupt output 10 data input 13 address input discharge gate drive output 14 charge current limit 6 current sense common 7 charge gate drive output 20 this document contains information on a product under development. motorola reserves the right to change or discontinue this product without notice. ? motorola, inc. 1996 issue 1
mc33346 2 motorola analog ic device data dtb suffix plastic package case 948h01 (tssop24) issue o outline dimensions dim min max min max inches millimeters a 7.70 7.90 0.303 0.311 b 4.30 4.50 0.169 0.177 c 1.20 0.047 d 0.05 0.15 0.002 0.006 f 0.50 0.75 0.020 0.030 g 0.65 bsc 0.026 bsc h 0.27 0.37 0.011 0.015 j 0.09 0.20 0.004 0.008 j1 0.09 0.16 0.004 0.006 k 0.19 0.30 0.007 0.012 k1 0.19 0.25 0.007 0.010 l 6.40 bsc 0.252 bsc m 0 8 0 8 notes: 1 dimensioning and tolerancing per ansi y14.5m, 1982. 2 controlling dimension: millimeter. 3 dimension a does not include mold flash, protrusions or gate burrs. mold flash or gate burrs shall not exceed 0.15 (0.006) per side. 4 dimension b does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.25 (0.010) per side. 5 dimension k does not include dambar protrusion. allowable dambar protrusion shall be 0.08 (0.003) total in excess of the k dimension at maximum material condition. 6 terminal numbers are shown for reference only. 7 dimension a and b are to be determined at datum plane w. s u 0.15 (0.006) t 2x l/2 s u m 0.10 (0.004) v s t l u seating plane 0.10 (0.004) t ??? ??? ??? section nn detail e j j1 k k1 detail e f m w 0.25 (0.010) 13 24 12 1 pin 1 ident. h g a d c b s u 0.15 (0.006) t v 24x ref k n n
mc33346 3 motorola analog ic device data dw suffix plastic package case 751e04 (so24l) issue e outline dimensions notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimensions a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.13 (0.005) total in excess of d dimension at maximum material condition. a b p 12x d 24x 12 13 24 1 m 0.010 (0.25) b m s a m 0.010 (0.25) b s t t g 22x seating plane k c r x 45 m f j dim min max min max inches millimeters a 15.25 15.54 0.601 0.612 b 7.40 7.60 0.292 0.299 c 2.35 2.65 0.093 0.104 d 0.35 0.49 0.014 0.019 f 0.41 0.90 0.016 0.035 g 1.27 bsc 0.050 bsc j 0.23 0.32 0.009 0.013 k 0.13 0.29 0.005 0.011 m 0 8 0 8 p 10.05 10.55 0.395 0.415 r 0.25 0.75 0.010 0.029 motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. atypicalo parameters which may be provided in motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. motorola does not convey any license under its patent rights nor the rights of others. motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the motorola product could create a situation where personal injury or death may occur. should buyer purchase or use motorola products for any such unintended or unauthorized application, buyer shall indemnify and hold motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that motorola was negligent regarding the design or manufacture of the part. motorola and are registered trademarks of motorola, inc. motorola, inc. is an equal opportunity/affirmative action employer. how to reach us: usa / europe / locations not listed : motorola literature distribution; japan : nippon motorola ltd.; tatsumispdjldc, 6f seibubutsuryucenter, p.o. box 20912; phoenix, arizona 85036. 18004412447 or 6023035454 3142 tatsumi kotoku, tokyo 135, japan. 038135218315 mfax : rmfax0@email.sps.mot.com touchtone 6 022446609 asia / pacific : motorola semiconductors h.k. ltd.; 8b tai ping industrial park, internet : http://designnet.com 51 ting kok r oad, tai po, n.t., hong kong. 85226629298 mc33346/d ?
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