o1007 ms pc 20061128-s00006 no.a0649-1/8 http://onsemi.com semiconductor components industries, llc, 2013 june, 2013 lv8080lp overview the lv8080lp is a two-channel constant-current driver th at supports low-voltage operation. it is optimal for constant-current drive of stepping motors (af and zoom ) in portable equipment such as camera cell phones. features ? two channels constant-current h-bridge driver ? built-in power supply switch and position detec tion comparator for use with a photoreflector ? supports both 2-phase dr ive and 1-2 phase drive. ? implemented in a low-power mos ic process. ? ultraminiature easy to solder vct16 package (2.6 2.6mm) ? built-in thermal protection and low-voltage sensing circuits specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc , vm max 6.5 v output voltage v out max out1, out2, out3, out4 6.5 v input voltage v in max cont, in -0.3 to +6.5 v ground pin source current ignd per channel 400 ma allowable power dissipation pd max mounted on a circuit board.* 700 mw operating temperature topr -30 to +85 c storage temperature tstg -40 to +150 c * specified circuit board : 40 50 0.8mm 3 : 4-layer (2s2p) glass epoxy printed circuit board bi-cmos lsi two channels constant-current h-bridge driver orderin g numbe r : ena0649 stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above the recommended oper ating conditions is not implied. extended exposure to stresses above the recommended operating conditions may affect device reliabili ty.
lv8080lp no.a0649-2/8 allowable operating ratings at ta = 25 c parameter symbol conditions ratings unit supply voltage v cc 2.5 to 6.0 v high-level input voltage v ih 0.6v cc or more v low-level input voltage v il cont, in up to 0.2v cc v electrical characteristics at ta = 25c, v cc = 3.0v ratings parameter symbol conditions min typ max unit i cco en = 0v 0.1 1 a current drain i cco 1 en = 3v 0.7 1 ma ron1 v cc = 3.0v (high and low side total) en = 3.0v, i out = 100ma 2.0 3.0 output on resistance ron2 v cc = 5.0v (high and low side total) en = 5.0v, i out = 100ma 1.50 2.0 constant-current output 1 i out 1 between rfg and ground : 1 95 100 105 ma constant-current output 2 i out 2 between rfg and ground : 0.5 (design specification) 190 200 210 ma output turn-on time traise with rfg1 and rfg2 shorted to ground (design specification) 1.3 3 s output turn-off time tfall with rfg1 and rfg2 shorted to ground (design specification) 0.25 0.65 s position detection voltage (high level) v h 1.0 1.06 v position detection voltage (low level) v l 0.74 0.8 v detection voltage hysteres is hys 0.165 0.18 0.195 v pi/pr pin current ipi/pr 20 ma input current i in v in = 3v 15 30 a note : the design specification items are design guarantees and are not measured. package dimensions pin assignment unit : mm (typ) (vct16) 3318 2.6 2.6 0.4 0.8 0.25 (0.035) side view side view bottom view top view laser marked index 0.5 (0.55) (c0.116) (0.13) (0.125) 1 2 16 sanyo : vct16(2.6x2.6) rfg1 out1 out2 out3 out4 in2 cont gnd compin pi/pr (top view) 1 16 15 14 13 5 6 7 8 2 3 4 12 11 10 9 rfg2 in3 in4 in1 v cc compout
lv8080lp no.a0649-3/8 block diagram constant-current calculation : i out = 0.1 rf example : when an i out of 100ma is required, rf must be 1 . usage notes the constant current is set by the resource rf connected between rfg and ground according to the formula shown above. truth table input output in1 in2 in3 in4 out1 out2 out3 out4 mode low low low low off off off off standby mode low high low high channel 1, reverse high low high low channel 1, forward high high - - low low off off channel 1, brake mode low high low high channel 2, reverse high low high low channel 2, forward - - high high off off low low channel 2, brake mode note : the "-" input unstable state. when off, a high-impedance state. ? the ena goes to the standby state with a low-level input , and to the operating state with a high-level input. ? the control input switches the forward/reverse mode. v cc 0.1v rfg2 in1 in2 in3 in4 lvs tsd vm pi/pr rfg1 cont stm 1.0v compout compin gnd l o g i c
lv8080lp no.a0649-4/8 pin description pin no. pin name description equivalent circuit 1 2 3 4 5 16 out1 out2 out3 out4 rfg2 rfg1 1-4 : output pins h-bridge type output pins pins 1 and 2 are paired and pins 3 and 4 are paired. 5, 16 : current sensing resistor connection pins connect the current sensing resistor between these pins and ground to detect the output currents for constant current control. pin 16 corresponds to the out put from pins 1 and 2 and pin 5 to the output from pins 1 and 2. - + 10k 0.1v v cc 1 5 2 6 7 8 9 10 in3 in4 in1 in2 cont logic input pins 10k 200k v cc gnd 6 11 gnd ground 12 compin photo reflector position sensing comparator input v cc 1k gnd 12 13 compout photo reflector position sensing comparator output this pin serves as an open-collector output of the npn transistor. 1k gnd 13 continued on next page.
lv8080lp no.a0649-5/8 continued from preceding page. pin no. pin name description equivalent circuit 14 pi/pr a switch, with nmos open-drain output, used to turn on/off the power supply of the position sensor unit. when using this switch, connect the position sensor unit between this pin and the v cc pin. on/off control of this switch is accomplished by cont pin. setting the cont pin high turns on the switch. 6 v cc gnd 15 v cc power supply pin timing chart (1) stepper motor timing chart timing chart for 2-phase drive (2) timing chart for 1-2 phase drive (slow decay mode) channel 1 output mode in1 in3 i in2 in4 forward standby standby reverse forward standby standby forward reverse forward channel 2 output mode channel 1 output mode in1 in3 i in2 in4 channel 2 output mode forward reverse forward reverse forward brake brake brake brake standby standby reverse forward standby standby forward reverse forward
lv8080lp no.a0649-6/8 photosensor position detection application circuit example (a) application circuit (b) timing chart v cc v cc cont compin 1.00v hysteresis : 0.2 v microcontroller power supply transistor drive region compout pi/pr compin v cc compout 10k tr ic peripheral circuits : position sensor block sensor power supply microcontrolle r power supply ic internal circuits : position detection circuit
lv8080lp no.a0649-7/8 01234567 3 4 5 6 12 8 01234567 supply voltage, v cc ?v current drain, i cco ?na 0 0.5 0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1.1 1.2 1.3 1.4 1 1.5 0 0.3 0.4 0.5 0.1 0.2 0.6 output current, i o ?a vsat ? v position detection circuit threshold voltage 0 0.5 1 1.5 2 2.5 3 3.5 0.8 0.85 0.95 0.9 1 1.05 input voltage, v in ?v output voltage, v o ?v pi/pr pin current (v cc = 3v/5v) 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 pi/pr pin current ? a pi/pr pin voltage ? v 0.095 0.096 0.097 0.098 0.099 0.1 0.101 0.102 0.103 0.104 0.105 03456 12 7 supply voltage, v cc ?v output current, i o ?a 07 supply voltage, v cc ?v current drain, i cco 1?ma i cco ? v cc supply voltage, v cc ?v input current, i in ? a input current (v in = 3v) i cco 1 ? v cc output on resistance (high and low side total) constant-current output (between rfg and ground : 1 ) v cc = 3v v cc = 3v v cc = 5v v cc = 5v 0 10 20 30 40 50 60 70 80 90 100 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 5 10 15 20 25 30 35 40 45 50
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