m / s ( h e l ) date: 25.dec.2003 design department ome manufacturing operation hitachi lighting,ltd 16-2,shinmachi 6-chome,ome-shi tokyo 198-8611,japan tel.0428-31-1211 fax.0428-31-1224 customer?s acceptance specifications (backlight inverters for cold cathode f l u o r e s c e n t l a m p ) t y p e : i n v c 6 5 7 c o n t e n t s no i t e m p a g e 1 c o v e r 1 2 record of revision 2 3 1 . s c o p e 2.general specification 3 4 3 . e r e c t o r i c a l c h a r a c t e r i s t i c s 4.reliability 4-6 5 5 . s t r u c t u r e s 6 6 6.structures and dimensions 7 7 7.precautions in design 8-9 accepted by proposed by 1 www..net
record of revision date page summary date code & rev. 25.dec.2003 new 2
1. scope 1.1 this specification shall apply to inverter INVC657 to operate a cold cathode fluorescent lamp in the liquid-crystal module(lcm). 1.2 this inverter INVC657 is designed and adjusted for tx14d lcd-module. (hitachi?s type name) 2. general specifications general specifications and condition for use are shown below. i t e m s p e c i f i c a t i o n cooling condition free air flow efficiency 75 % min w e i g h t 8 . 8 g t y p operating ?10~70deg ambient temperature (direct ambient air of inverter board) stock -20~85deg humidity 90 % rh.max. corrosive gasses not acceptable audible sound level 35db max. at 30cm 3
3. electrical characteristics 3.1.max i mum ratings i t e m s m i n . t y p . max . u n i t r e m a r k s input voltage --- --- 14.0 v 3.2.operationg characteristics i t e m m i n t y p max u n i t r e m a r k s input voltage 10.8 12.0 13.2 v 2 8 0 3 2 0 3 6 0 m a at 1 2 . 0 v max input current 4 0 6 0 8 0 m a at 1 2 . 0 v min 3 . 5 4 . 0 4 . 5 m a at 1 2 . 0 v max output current 1 . 3 1 . 8 2 . 3 m a at 1 2 . 0 v min main frequency 57 67 7 7 k h z at 1 2 . 0 v max all characteristics are measured at tx14d. 4
(1) all characteristics are measured by our certain test equipment. the measurement of condition should be stable light ing (more than 30 minutes after startup :at 25+/-1 deg and no breath of wind) (the measurement of input rush current is exception.) (2) the electrical characterist ics are measured as we show on measurement diagram fig.1. vcc=12v. (3) as we show on measurement diagram fig.1, the test equipment shall be v1:dc volt meter (class0.5) a1:dc current meter(class0.5) a2:ac current meter type2016(y.e.w) or fluke45(fluke) vcc:dms35-2.3(metronix) . (4) the line length of between the lamp and 1pin of cn2(high voltage side) is less than 150mm. the line length of between the lamp and 2pin of cn2(low voltage side) is less than 400mm. h.v. vcc inverter 1,2 2 3,4 1 l.v. l c m a2 v1 a1 fig.1 wiring 3.4. wiring diagram h.v. 3.3v:max 0v:min l.v. dc 12v in gnd on/off 1,2 vcc 2 c f l inverter INVC657 3,4 gnd 5 on/off 6 dim 7 n c 1 fig.2 wiring diagram 5
4.reliability i t e m t e s t c o n d i t i o n low temp.oper. -10deg, 12.0v, 100%output, 500hrs high temp.oper. 70deg, 12.0v, 100%output, 500hrs low temp.stock. -20deg, 500hrs high temp.stock. 85deg, 500hrs high temp. and high humidity 50deg, 95% 12.0v, 100%output, 500hrs cyclic temp.oper. 0deg ? 25deg ?50deg 1hrs each 12.0v, 100%output, 50cycles thermal shock -20deg ? 70deg, 0.5hrs each 100cycles vibration 3g, 30~200hz, 0.5hrs,xyz-axis impact test 50g,x yz-ax is 5.structure 5.1 dimensions reference to drawing p.7 5.2 interface specification input connector cn1:sm07b-srss-tb(jst) pin no. symbol comment 1 , 2 v c c vcc 1 2 . 0 v t y p 3 , 4 g n d g n d 5 on/off off at 0v on at 3.3v~5.0v 6 d i m b r i g h t n e s s c o n t r o l 3.3v at max, 0v at min 7 n c - - - output connector cn2:sm02(8.0)b-bhs-1-tb(jst) pin no. symbol 1 h . v . 2 l . v . 6
6.structure and dimensions fig.3 dimensional outline 1.manufacturer?s name : ?hitachi? silk print 2.manufacture?no : invc?657? silk print 3.date code : ex ?25n3? 7
7.precautions in design 7.1 please turn off the power supply of the inverter before the out put connector (cn2) be put in or put o ff. because voltage of the output connector is very high. 7.2 the high-voltage wiring of lamps may affect the characteristics of this product even in the presenc e of a slight stray capacity of 1 to few pf. so, please check whatever the belo w points have fully considered. (1) please use ul1330 equivalents as inverter output leads and keep length within 150mm. (2) please keep the length of wiring as short as possible and at the same time avoid binding high-voltage and low-voltage leads together and fitting high-voltage leads near the shield. (3) consider the electric potential of the parts adjacent to a wire because it greatly affects the electr ic characteristics and startup characteristics. 7.3 in the case of put in and put o ff the connector(cn1), please switch off power supply of the inverter. if powe r supply is operating it will possible that the inverter break down. 7.4 please pay attention in using the inverter. because the transformer in the inverter is weak to impact. 7.5 if it was exposed to thermal shock( out of order), come to have a crack itself. 7.6 please do not give it any changes , such as reworking it, applying and hardening with adhesives, molding wit h resin, fixing with tape. 7.7 please make a tight connection out put and input connector.(if inverter?s connecter contact was imperfection, t he components of inverter have high temperature and break down.) 8
7.8 pay attention as printed circui t board is bent, and not adding excessive pressure when printed circuit board is built in. (deterioration and the damage of component are caused, and move ments of invert er are out of order.) 9
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