connectors 03/23/11 specifications and applications information page 1 of 4. the erg smart force series smart force series smart force series smart force series smart force series of led drivers are specifically designed for applications which require wide dimming and lcd brightness stability over a wide input voltage range. the SFDKB4031F is designed to provide backlight power for the sharp lq185k1lgn3 display. designed, manufactured and supported within the usa, the sfdk features: ? 8 mm or less in height ? wide input voltage range ? constant led current ? external dimming ? high dimming ratio ? soft start ? one year warranty j1-1 vin(+) j1-2 vin(+) j1-3 gnd j1-4 gnd j1-5 enable j1-6 (do not use) j1-7 (do not use) j1-8 (do not use) output connectors * jst 10flh-rsm1-tb smar smar smar smar smar t f t f t f t f t f oror oror or ce led ce led ce led ce led ce led driver driver driver driver driver input connector molex 53261-0871 package configuration pcb components are shown for reference only. actual product may diffe r from that shown. mass: 13 grams SFDKB4031F j2-1 cathode 1 j3-1 cathode 4 j2-2 cathode 1 j3-2 cathode 4 j2-3 cathode 2 j3-3 cathode 5 j2-4 anode a j3-4 anode b j2-5 anode a j3-5 anode b j2-6 anode a j3-6 anode b j2-7 anode a j3-7 anode b j2-8 cathode 2 j3-8 cathode 5 j2-9 cathode 3 j3-9 cathode 6 j2-10 cathode 3 j3-10 cathode 6 * requires harness (2x): erg part number hff05010-4 recommended output 1 input 1 output 4.585 [116,5] .125 [3,18] dia. (2x) .575 [14,6] .830 [21,1] .135 [3,43] 1.15 [29,2] 1.05 [26,7] 3.155 [80,14] 1
page 2 of 4. note 1 surface temperature must not exceed 80 c. sot89 package to be at or below 110 c. note 2 peak inrush occurs over a 1 to 3 ms time period, during initial startup . note 3 the input voltage to the driver must be within its operating characteristic before the driver is enabled , otherwise the driver may not start or may shut down unexpectedly. note 4 input impedance is 5.0 kohms to gnd. specifications subject to change without notice. SFDKB4031F sgnitar m u mixa m etulosba gnita rl obmy se ula vs tinu egnaregatlovtupni v ni 0.02+ot3.0 -c dv erutarepmetegarots t gts 58+ot04- o c egatlovtupnielbane v elbane nivot 0c dv scitsiretcarah c gnitarep o 52=atdnacdstlov00.21=nivdetonesiwrehtosselnu o .c citsiretcarah cl obmy sn i mp y tx a ms tinu egatlovtupni v ni 0.01 +0 .21 +0 .81 +c dv ecafrustnenopmoc erutarepmet )1eton( t s 04 --0 8+ o c tnerructupni i ni 29. 09 0. 15 2. 1c da tnerruchsurnikaep )2eton( i kaep -5 . 1- c da egatlovgnirts de lv del 6.8 39 .2 44 .4 4c dv ycneiciffe hh h hh -7 7-% )gnirtsrep(tnerructuptu oi tuo 7 39 31 4c dam nipelbane )3eton( dlohserhtno-nrut v noht -- 0 . 2c dv dlohserhtffo-nrut v ffoht 8. 0-- c dv ecnadepmitupnielbane )4eton( r elbane -5- s mhok
page 3 of 4. application information the erg SFDKB4031F has been designed to be configured in mul tiple ways: no dimming ? operation: the sfd driver can be configured to operate withou t dimming by pulling up the enable pin (j1-5). ? pins 1 and 2 of connector j1 must be connected to +vin, between 10 and 18 vdc. pins 3 and 4 of connector j1 must be connected to gnd. external pwm dimming ? operation: external pwm configuration as shown in figure 1 allo ws the user to control display brightness with an externally generated pwm signal. the user is responsible to provide the pwm signal. a dimming ratio up to 5000:1 at 200 hz is possible with this configuration. ? dimming: dimming is accomplished by applying a pwm signal to the enable pin (j1-5). pwm on and off levels are specified in the operating characteristics section of the d ata sheet. display brightness is modulated by controlling the pwm duty cycle as shown in graph 1. ? pins 1 and 2 of connector j1 must be connected to +vin, between 10 and 18 vdc. pins 3 and 4 of connector j1 must be connected to gnd. SFDKB4031F
page 4 of 4. u l ? r e g i s t e r e d f i r m r e g i s t e r e d f i r m e n d i c o t t r e s e a r c h g r o u p , i n c . i s o 9 0 0 1 a 3 3 1 3 endicott research group, inc. (erg) reserves the right to make changes in circuit design and/or specifications at any time without notice. accordingly, the re ader is cautioned to verify that data sheets are current before placing orders. information furnished by erg is believed to be accurate and reliable. however, no responsibility is assumed by erg for its u se. SFDKB4031F graph 1 figure 1 external pwm dimming enable +12v gnd vin j1 5v duty cycle 0% - 100% 0v 5 3,4 1,2 cathode 2 anode a j2 j3 cathode 1 cathode 3 cathode 5 anode b cathode 4 cathode 6
|
