CM8300 m ultiple -led c urrent b alancer 2002/07/05 preliminary champion microelectronic corporation page 1 general description features ideal for 2 to unlimited-led design current sense for photo-couple self powered without additional power supply 8-pin psop and ptssop package absolute maximum voltage is 5vdc +/- 1% current tracking accuracy the CM8300 is the multiple-led current balancer. it can be used for led application. by implementing the daisy configuration, users can design a single network that can drive many parallel leds, resulting in dramatic total system cost reduction. the CM8300 gets its power through the led and therefore does not require an additional power supply. the maximum dc voltage is 5 vdc. each pin can handle up to 10ma. the CM8300 family comes with the industry standard psop-8, ptssop package. applications pin configuration multiple led in lcd backlight psop-8 (ps08)/ptssop-8 (pt08) top view 1 2 3 4 8 7 6 5 islave3 comm islave 4 nc islave2 imaster islave1 nc
CM8300 m ultiple -led c urrent b alancer 2002/07/05 preliminary champion microelectronic corporation page 2 pin description operating rating pin no. symbol description min. typ. max. unit 1 islave3 current output pin. connect to one of the slave lamp and the current will follow the imaster 30 50 ma 2 comm common pin for lamp network 30 50 ma 3 islave4 current output pin. connect to one of the slave lamp and the current will follow the imaster 30 50 ma 4 nc 5 nc 6 islave1 current output pin. connect to one of the slave lamp and the current will follow the imaster 30 50 ma 7 imaster current output pin. connect to master lamp. connect a serial resistor to ensure the lamp is master 30 50 ma 8 islave2 current output pin. connect to one of the slave lamp and the current will follow the imaster 30 50 ma ordering information part number temperature range package CM8300is -40 ~+85 psop-8 (ps08) CM8300it -40 ~+85 ptssop-8 (pt08) block diagram + q2 1 2 3 - - - imaster driver - charge pump 7 + 1 r2 2 1 + to internal circuit r4 2 1 8 r1 2 1 q3 1 2 3 + islave 1 islave 3 reference bias 2 q5 mos-n 1 2 3 islave 2 r3 2 1 3 current tracking circuit 6 q1 1 2 3 comm 1/5 phase detector islave 4 and q4 1 2 3 bandgap
CM8300 m ultiple -led c urrent b alancer 2002/07/05 preliminary champion microelectronic corporation page 3 absolute maximum ratings absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device operation is not implied current on imaster, islave1, islave2, islave3 ?. 50ma junction temperature ???????????? +150c voltage on imaster, islave1, islave2, islave3 ?. 5v storage temperature ?????.?.?.. -65 c to +150c current on isense ???????????????? 30ma lead temperature (soldering 10 sec.) ??.??.. +260c thermal resistance ( ja ) ?????????.. +150 /w operating conditions temperature range ............................. -40c to +85c electrical characteristics (unless otherwise stated, these specifications apply t a =25 c ) maximum ratings are stress ratings only and functional device operation is not implied. CM8300 symbol parameter test conditions min. typ. max. unit current tracking test, islave1, islave2, islave3 = 5v and imaster=1ma islave1 29.98 30 30.02 ma islave2 29.98 30 30.02 ma islave3 29.98 30 30.02 ma islave4 29.98 30 30.02 ma
CM8300 m ultiple -led c urrent b alancer 2002/07/05 preliminary champion microelectronic corporation page 4 dn8 o-led dn10 o-led d10 o-led u3 CM8300 2 1 3 4 5 6 7 8 comm i-slave 3 i-slave4 nc nc i-slave 1 i-master i-slave2 dn3 o-led dn1 o-led d7 o-led d1 o-led d4 o-led d2 o-led dn4 o-led dn6 o-led d5 o-led d9 o-led un3 CM8300 2 1 3 4 5 6 7 8 comm i-slave 3 i-slave4 nc nc i-slave 1 i-master i-slave2 u1 CM8300 2 1 3 4 5 6 7 8 comm i-slave 3 i-slave4 nc nc i-slave 1 i-master i-slave2 d6 o-led d8 o-led u2 CM8300 2 1 3 4 5 6 7 8 comm i-slave 3 i-slave4 nc nc i-slave 1 i-master i-slave2 vcc r1 150 vcc dn5 o-led un2 CM8300 2 1 3 4 5 6 7 8 comm i-slave 3 i-slave4 nc nc i-slave 1 i-master i-slave2 d3 o-led un1 CM8300 2 1 3 4 5 6 7 8 comm i-slave 3 i-slave4 nc nc i-slave 1 i-master i-slave2 r1 150 dn7 o-led dn2 o-led dn9 o-led typical application schematic for organic-led current control
CM8300 m ultiple -led c urrent b alancer 2002/07/05 preliminary champion microelectronic corporation page 5 package dimension 8-pin psop (ps08) 8-pin ptssop (pt08)
CM8300 m ultiple -led c urrent b alancer 2002/07/05 preliminary champion microelectronic corporation page 6 important notice champion microelectronic corporation (cmc) reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. a few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. cmc integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. use of cmc products in such applications is understood to be fully at the risk of the customer. in order to minimize risks associated with the customer?s applications, the customer should provide adequate design and operating safeguards. hsinchu headquarter sales & marketing 5f, no. 11, park avenue ii, science-based industrial park, hsinchu city, taiwan 11f, no. 306-3, sec. 1, ta tung rd., hsichih, taipei hsien 221 taiwan, r.o.c. t e l : +886-3-567 9979 t e l : +886-2-8692 1591 f a x : +886-3-567 9909 f a x : +886-2-8692 1596 http://www.champion-micro.com
|
