ver1.3 rohs directive pass 023-09-0009 091218ma no.1 p r e l i m i n a r y s p e c i f i c a t i o n s product name THB7128-E 1 c ase outline 1 9 pins (see attached case outline dimensions.) 2 function pwm current control stepping motor driver 3 application industrial equipment etc. 4 features ? output on-resistance (high side 0.3 , low side 0.25 , total 0.55 ; ta = 25 , i o = 2.5a) ? vmmax= 40 v(dc) io pmax=3. 3 a ? 2, 1 -2, w1-2, 2w1-2, 4w1-2, 8w1-2, 16w1-2, 32w1-2 phase excitation are selectable ? with built-in automatic half current maintenance energizing function ? over current protection circuit ? thermal shutdown circuit ? input pull down resistance ? with reset pin and enable pin 5 absolute maximum ratings tc=25 parameter symbol conditions rat i ngs unit supply voltage vmmax 40 v peak output current iopmax 3. 3 a logic input voltage vinm ax 6 v vref input voltage vref max 3 v operating substrate temperature tc -3 0 to +10 5 storage temperature tstg -40 to +125 6 allowable operating ranges ta=25 parameter symbol conditions rati ngs unit supply voltage range vm 9 to 32 v logic input voltage range vin 0 to 5 v vcc input voltage range vcc 0 to 5 v vref input voltage range vref 0 to 3 v output current1 io1 1-2phase-ex tc Q 90 3.0 a output current2 io2 1-2phase-ex tc=105 2.5 a output current3 io3 2phase-ex tc=105 1.8 a h t t p : / / w w w . h h b y t e c h . c o m / c n /
THB7128-E 023-09-0009 091218ma no.2 7 electrical characteristics tc=25 , vm=24v, vref=1.5v ratings parameter symbol conditions mi n. typ. max. unit standby mode current drain imstn vc c=l 1 00 a current drain im vcc h enable="h" no load 3.3 4.6 ma thermal shutdown temperature ts d design guarantee 150 180 210 thermal hysteresis width ? ts d design guarantee 40 iinl1 vin=0.8v 3 8 15 a logic pin input current ii nh1 vin=5v 30 50 70 a logic input high-level voltage vinh 2.0 v logic input low-level voltage vinl 0.8 v chopping frequency fc h c1=100pf 58 83 108 khz chopping frequency io sc1 10 a vtup1 1 v chopping oscillator circuit threshold voltage vt down1 0. 5 v vref pin input voltage ir ef vref=1.5v clk=10khz -0.5 a down output residual voltage vo ldo idown=1ma clk=low 40 mv hold current switching frequency falert 1 .6 hz blanking time tb 1 1 s output block ronu i o =2.0a, high-side on resistance 0.30 0.42 output on-resistance ro nd i o = 2.0a, low-side on resistance 0.25 0.35 output leakage current ioleak vm =36v 50 a diode forward voltage vd id =-2.0a 1.1 1.4 v current setting reference voltage vr f vref=1.5v, current ratio 100% 3 00 mv output short-circuit protection block timer latch time tscp 2 56 s h t t p : / / w w w . h h b y t e c h . c o m / c n /
THB7128-E 023-09-0009 091218ma no.3 8. block diagram 9 ap plication circuit example 2 3 15 5 16 18 17 19 8 4 6 12 14 7 9 11 13 m3 m2 m1 vcc clk 5v vref osc1 sgnd nfb nfa vm out2b out1b out2a out1a c1 rfb rfa r2 r1 c2 c3 THB7128-E gnd vm=24v 1 gnd 10 pgnd m3 m1 vm nfb down sgnd vcc enable m2 out1a out 2a 19 17 15 9 8 6 vref 5 osc1 4 cw/ccw 2 18 16 14 12 7 clk 3 13 11 g nd 1 pgnd 10 nfa vreg2 pg nda pgndb vreg1 osc2 fdt output pre stage output pre stage regulator 2 regulator 1 current select circuit output pre stage output pre stage output control logic current select circuit decay mode setting circuit oscillator out 1b o ut2b enable 1.2k cw/ccw h t t p : / / w w w . h h b y t e c h . c o m / c n /
THB7128-E 023-09-0009 091218ma no.4 10 pin functions pin no. pin symbol pin functions 1 gnd circuit gnd 2 cw/ccw forward / reverse signal input 3 clk clock pulse signal input 4 osc1 chopping frequency setting capacitor connection 5 vref constant-current control reference voltage input 6 sgnd signal gnd 7 out2b b phase outb output 8 nfb b phase current sense resistance connection 9 out1b b phase outa output 10 pgnd power gnd 11 out2a a phase outb output 12 nfa a phase current sense resistance connection 13 out1a a phase outa output 14 vm motor supply connection 15 vcc chip enable input 16 m1 17 m2 18 m3 excitation-mode switching pin 19 enable output enable signal input h t t p : / / w w w . h h b y t e c h . c o m / c n /
THB7128-E 023-09-0009 091218ma no.5 1 1 description of functions (1) e xcitation setting method set the excitation setting as shown in the following table by setting m1 pin, m2 pin and m3 pin input signal initial position m3 m2 m1 mode excitation a phase current b phase current l l l 2 phase 100 -100 l l h 1-2 phase 100 0 l h l w1-2 phase 100 0 l h h 2w1-2 phase 100 0 h l l 4w1-2 phase 100 0 h l h 8w1-2 phase 100 0 h h l 16w1-2 phase 100 0 h h h 32w1-2 phase 100 0 the initial position is also the default state at start-up and excitation position at counter-reset in each excitation mode (2)output current setting output current is set as shown below by the vref pin (applied voltage) and a resistance value between nfa (b) pin and gnd. i out = (vref / 5) / nfa (b) resistance * the setting value above is a 100% output current in each excitation mode. (example) when vref=1.5v and nfa (b) resistance is 0.3 , the setting current is shown below. i out = (1.5 v / 5) / 0.3 = 1.0 a (3) chip enable terminal/ vcc function when chip enable terminal/ v cc pin is at low levels, the ic enters stand-by mode, all logic is reset and output is turned off. when chip enable terminal/ v cc pin is at high levels, the stand-by mode is released (4) step pin function clk pin step signal input allows advancing excitation step input v cc clk operation l * stand-by mode h excitation step feed h excitation step hold (5) forward / reverse switching function cw/ccw operation l cw h ccw (6) output enable function when the enable pin is set low, the output is forced off and goes to high impedance. however, the internal logic circuits are operating, so the excitation position proceeds when the clk is input. therefore, when enable pin is returned to high, the output level conforms to the excitation position proceeded by the clk input. (7) decay mode the decay mode of the output current becomes only mixed decay. h t t p : / / w w w . h h b y t e c h . c o m / c n /
THB7128-E 023-09-0009 091218ma no.6 (8) chopping frequency setting function chopping frequency is set as shown below by a capacitor between osc1 pin and gnd. fch = 1 (c1+20pf 1010 -6 ) (hz) (example) when cosc1=100pf, the chopping frequency is shown below. fch = 1 ((20+ 100)10 -12 1010 -6 ) (hz) = 83.3 khz note ? the 20pf is a stray capacitance which is involved by the package of THB7128-E. ( 9) output short-circuit protection circuit build-in output short-circuit protection circuit makes output to enter in stand-by mode. this function prevents the ic from damaging when the output shorts circuit by a voltage short or a ground short, etc. when output short state is detected, short-circuit detection circuit starts the operating and output is once turned off. after the timer latch time (typ: 256 s), output is turned on again. still the output is at short state, the output is turned off and fixed in stand-by mode. when output is fixed in stand-by mode by output short protection circuit, output is released the latch by setting chip enable terminal/ v cc ="l" (10) output current tolerance THB7128-ES??iotc 0 0.5 1 1.5 2 2.5 3 3.5 0 10 20 30 40 50 60 70 80 90 100 110 r?tc ?`ioa 1-2 ? 2 THB7128-E output current tolerance io tc operating substrate temperature tc output current iopeak io a 1-2 phase excitation and more 2 phase excitation h t t p : / / w w w . h h b y t e c h . c o m / c n /
THB7128-E 023-09-0009 091218ma no.7 (11) when mounting multiple drivers on a single pc board when mounting multiple drivers on a single pc board, the gnd design should mount a vcc decoupling capacitor, c2 and c3, for each driver to stabilize the gnd potential of the other drivers. the key wiring points are as follows. gnd vm=24v 2 3 15 5 16 18 17 19 8 6 12 14 7 9 11 13 enable m3 m2 m1 vcc clk cw/ccw 5v vref osc1 nfb v out2b out1b out2a out1a c1 r2 r1 c2 c3 THB7128-E nfa sgnd rfa rfb 2phase stepping motor 4 10 1 gnd pgnd 2 3 15 5 16 18 17 19 8 6 12 14 7 9 11 13 enable m3 m2 m1 vcc clk cw/ccw 5v vref osc1 nfb v out2b out1b out2a out1a c1 r2 r1 c2 c3 THB7128-E nfa sgnd rfa rfb 2phase stepping motor 4 10 1 gnd pgnd thick and short wiring thick and short wiring h t t p : / / w w w . h h b y t e c h . c o m / c n /
THB7128-E 023-09-0009 091218ma no.8 package outline diagram product name THB7128-E n o. part name material treatment unit mm case epoxy tolerance 0.4 substrate imst substrate dont scale this drawing. lead frame cu sn control no. 016-09-0083 oct.21.2009 new prepared machida sakai date revision in charge approval note1:mark for no.1 pin identification. note2:the form of a character in this drawing differs from that of hic. note3:this indicates the date code. the form of a character in this drawing differs from that of hic. note1 note2 note3 1 19 th b 7128 h t t p : / / w w w . h h b y t e c h . c o m / c n /
THB7128-E 023-09-0009 091218ma no.9 h t t p : / / w w w . h h b y t e c h . c o m / c n /
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