TCA1560

TCA1560B SIEMENS | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 19

Technical content

Features

@ 2.5 A peak current ne i @ High-speed integrated clamp diodes Se ag eT @ Simple drive Se os ¢ @ Thermal overload protection with hysteresis : 7 ml : p-o1-18-L-9 = : Type Ordering Code | Package BTCA 1561 B | Q67000-A8209 | P-SIP-9 oe BTCA 1560 B | Q67000-A8208 | P-DIP-18-L9 e . EIVTCA 1560 G | Q67000-A8272 | P-DSO-20-L12 (SMD) : jew type SE" The TCA 15618 is a bipolar monolithic C designed to Se ee : control the motor current in one phase of a bipolar = stepper motor. It can also be used to drive direct- see cys current motors as well as all inductive loads operated | F by constant current. aor a See The IC has TTL-compatible logic inputs and contains | = = A a full-bridge driver with integrated, high-speed free- J ~) See BE wheeling diodes and chopper-operated dynamic motor AICTE A current limiting. The nominal current is infinitely variable Joos 3) with a control voltage. Using a minimum of external Mer) Ee seal Es Bike components and a single supply voltage, two TCA 1561B |nosppeaa ICs form a complete and directly MC-drivable system 7 for two-phase bipolar stepper motors with output currents up to 2.5 A per phase. The functionally identical TCA 1560 B in P-DIP-18-L9 package is designed for output currents up to 1.25 A. 641 8.90

(top view) TCA 1561 B TCA 1560B i ao ant 8 Phase input 2 —<—] Phose Input 2 ” Enadie input 3 ——<—] Enable tnput 3 %6 Actual Current § ——<—] ‘Actual Current & 5 | oo oN %5—< WS 14 bMtust be Connected to Pin no 6—<J Go 6 3 Sync input /RE 7 —<—} Syne Input /RC 7 2 Nominal Current input 8 ——<—| Nominal Curcent input 8 ” 2 9——< a2 9 » Pin Definitions and Functions TCA 1561 B TCA 1560 B Pin Function Pin ‘Symbol | Function

1 Output Q1 1 Kel Output a1

2 Phase input 2 Phase input

3 Enable input 3 Enable input

4 Actual current 4 Actual current

5 Vs Supply voltage 5 Vs___| Supply voltage

6 GND Ground 6 GND Ground

7 RC ‘Syne inpu/RC 7 RC Sync inpuvRC

8 Nominal current input 8 Nominal current input

9 a2 Output Q2 9 Output Q2 10-18 Ground (must be The cooling fin is connected connected to pin 6) internally to pin 6 (ground). Siemens Aktiengesellschaft 642

Pin Configuration Pin Definitions and Functions P-DSO-20-L-12 Pin Function aah zoho 1 Output NC.o2 19D how 2.3 Not connected Ncoya 18 FOTsYN/RC : wey “7 Ground -f : 3| POND 8 Not connected 7 wi 9 Actual Current Sad “Bete 11 [1pm | Phase input eae 12 Enable Input

13 Not connected

1417 Ground

18 Synchron. Input/RC

19 Nominal Current input

20 Supply Voltage

Siemens Aktiengesellschaft 643

Notes in brackets refer to TCA 1560 G! 3 ras 8) 3 ss 3 $ 3 2 : = Get = = tera lea se =, E &| |iv= _ <I eg eB] 1 2. && S Es os g Res z Te, win “2 2s ea | W293) es B2ee € && eee ES ae €F geae ze —¢Z4 Fa os Siemens Aktiengesellschaft 644

Notes in brackets refer to TCA 1560G. Outputs Outputs Q1, Q2 at pins 1, 9 (pins 1, 10) are fed by push-pull output stages. The two integrated free-wheeling diodes, referred to ground or supply voltage respectively, protect the IC against flyback voltages from an inductive load. Enable Outputs Q1 and Q2 are turned off when voltage V.,<0.8 V is applied to pin 3 (pin 12). The supply current then decreases maximally to 1 mA. The same occurs if pin 3 is not connected. The sink transistors are turned on when V,22 V. Phase The voltage at pin 2 (pin 11) determines the phase position of the output current. Output Q1 acts as sink for V0.8 V and as source for V,,22 V. Similarly output Q2 acts as sink when V,,22 V and source when V0.8 V The sink transistors are current-chopped. An internal circuit avoids undesired cross-over currents at phase change. Nominal Current Input The peak current in the motor winding is determined by the voltage at pin 8 (pin 19). A comparator compares this with the voltage drop at the actual current sensor at pin 4. if the nominal current is exceeded, the output sink transistors are turned off by a logic circuit. sme mpuvRc B Outputs are turned on by a signal at pin 7 (pin 18). Two operating modes are possible: synchronizing by a fed-in TTL signal or free-running with the external RC combination. Free-Running Operation When the supply voltage is applied, capacitor C, at pin 7 (pin 18) charges to a limiting voltage, typically 2.4 V, With increasing current in the motor winding, the voltage rises at the actual current sensor A, at pin 4 (pin 9). After exceeding the predetermined value at the nominal current input (pin 8) the comparator, in conjunction with pulse suppression, resets an RS flipflop. The logic turns off sink transistors T3 and T4. C, ceases charging and the parallel resistance R; the discharges C,. The sink transistors remain turned off until the lower threshold voltage of the Schmitt trigger is reached. This off period is thus controlled by the time constant t, = R, x C;. After the lower trigger threshold has been passed, the monoflop is triggered by the falling edge of the Schmitt trigger output and, provided the voltage at the actual current sensor at pin 4 (pin 9) is lower than the nominal value at pin 8 (pin 19), the RS flipflop is reset. The logic circuit then turns on the sink transistors T3 or T4 and recharges capacitor C,. If the voltage at pin 4 (pin 9) rises above the comparator value at pin 8 (pin 19), the sink transistors T3 and T4 are turned off again. Turn-on cannot be repeated until capacitor C, has discharged to the lower trigger threshold, the discharge time being a function of A, and C;. Siemens Aktiengesellschaft 645

‘Synchronous Operation Notes in brackets refer to TCA 1560G lf a TTL level sync signal is fed to pin 7 (pin 18), the negative edge sets the RS flipflop, via the Schmitt trigger/monoflop combination, provided that the voltage at pin 4 (pin 9) is below the nominal value at pin 8 (pin 19). As in the free-running operation mode, the relevant output transistors become conductive. Similarly they are cut off by resetting the RS flipflop once the voltage at pin 4 (pin 9) is higher than the nominal value at pin 8 (pin 19). Pulse Suppression In all cases the pulse suppression circuit eliminates positive pulses, typically of 0.5 us duration, at pin 4 (pin 9). These can result from cross-over currents in chopper operation through the integrated free-wheeling diodes. As a result, the voltage at pin 4 (pin 9) rises well above the nominal value, and without pulse suppression this would lead to dynamic current limiting. The duration of these basically unavoidable cross-over currents is of the same order of magnitude as the reverse-recovery time of the free-wheeling diodes. Temperature Safeguard If the temperature of the IC rises to approx. 150°C, the final stages are turned off. At approx. 130°C they are turned on again. Logic Table Enable L {e H HL Phase | L H L H Output Qi / / L H Transistor 1 x x x . at: Transistor T2 x x : x V,>10 mV (V.>10 mV)* Transistor T3. x x ” x R,>0Q (Ry>0Q)* Transistor 14 x x x " LL =Low voltage level, input open H =High voltage level X = Transistor turned off + = Transistor conducting «+ = Transistor conducting with current limiting turned on / = Output high-impedance Siemens Aktiengesellschaft 646

Te=—40°C to 85°C | ___ Limit values Parameter Symbot_[ min. [max | Unit. Supply woage ins [ve |-08 [as fv Supply current, pin § ee le | A Peak current in output transistors, pin 1, 9 Ig A Diode Currents Diode to +Vs 25 A Diode to ground Te 25 LA Input voltage, pins 2, 3, 7, 8 ly _|-o3 fe |v Voltage, pin 4 5 Lv Ground current, pin 6 es Junction temperature i, lo [8 | °C Storage temperature Tatg °c ‘Thermal resistance oo | system ~ ambient Rinsa 70 kw system — case Run sc 18 Kw Operating Range Supply voage in v Case temperature *c Input voltage, pins 2, 3, 7 5 Iv Output current [lo |-2 —~*«([2 A Siemens Aktiengesellschaft 647

Vg = 24 V; Te = 25°C Parameter emo [fon u_| Test Conditions Supply current, pin 5 Ts 18 mA Vis = Vow ‘Supply current, pin 5 Is 05 mA Vg= Vu Output, Pins 1, 9 Output voltage: source Vou 17 19 Vv VIgl=tA Output voltage: source Von 19 | 24 v HIgl=1.5A Output voltage: sink Vo. 12 14 Vv lIgl=1A Output voltage: sink Vou 15 17 v LIgl=1.5A Reverse current Vos 300 | pA Phase dead time ty 03 1.0 us figure 1 Forward voltage of diodes Vow 1.0 12 Vv Tpg= 1A to+Vs Vew wW 13 Vv Tee=15A Forward voltage of diodes Vev eI 13 v Tata to ground Vew 1.3 15 Vv Tp=15A Inputs: Enable, Pin 3 and Phase, Pin 2 H-input voltage Via | Vv L-input voltage ve 08 v H-input current Ty 50 100 | pA Vy=5V Linput current mh {100 | pA YW=0V Rise and fall time ta ty 2 us Nominal Current, Pin 8 Control range Ve 2 lv Input current ls 5 | HA Vg=0V Input offset voltage Vea) ) | mv figure 3 Actual Current, Pin 4 Control range Via Vv figure 3 Turn-off delay tp ps figure 4 ‘Sync Input/RC, Pin 7 ‘Sync frequency 1 100 | kHz Duty cycle: 0.5 Duty cycle D og | f= 40 kHz Rise and fall time tty 2 | us Output current, pin 7 =lar 16 | 20 | ma Trigger threshold, pin 7 Vz 06 08 v figure 2 Charging limit C Ver 24 v Off period torr 64 ys figure 5 Dynamic input resistance Ri 1 kQ V,=15V pin? i Siemens Aktiengesellschaft 648

To =—25 to 85°C Notes in brackets refer to TCA 1560G Limit Values Parameter Symbol | min. | max. {Unit Supply voltage, pin 5 (pin 20)* Vs -03 45 v Supply current, pin 5 (pin 20) Is 0 1.25 (1.0) A Peak current in output transistors, pins 1, 9 (pins 1, 10) To =1.25 (1.0) _| 1.25 (1.0) A Diode Currents, Pins 1,9 (pins 1,10) Diode against +Vs Tew 1.25 (1.0) A Diode against ground (de 1.25 (1.0) A Input voltage, pins 2, 3, 7,8 v 6 y (pins 11, 12, 18, 19) Output current, pin 4 (pin 9) Ty [=12610 [A Voltage, pin 4 (pin 9) Ma Va) ee Ground current, pin 6 (pin 4 to 7) Tg La) 4.25 (1.0) A Ground current (pin 14 to 17) Crasr (1.0) A Junction temperature y 150 °C Storage temperature Teta 125 °C Thermal resistance junction — ambient Rinia 70 | Kw junction - case (measured at pin 14) (pin 4 to 7) Rejc 15 kw Operating Range |g Supply voltage, pin 5 [we tao Package temperature measured at pin 14 (pin 4 to 7) To °c input voltage, pins 2,37 pins 11a) [MT ts Output current, pins 1, 9 (pins 1, 10) [fof -105) | 105) A Siemens Aktiengesellschaft 649

Vg = 24V; To = 25°C Notes in brackets refer to TCA 1560G. Parameter [amos [am Tae |u| Tost Conditions ‘Supply current, pin 5 (pin 20) | Js 18 mA Vig = Vig Supply current, pin 5 (pin 20) | Is 0.5 mA Vig = Vi Output, Pins 1, 9 (pins 1, 10) Output voltage: source: Vou 16 18 Vv Hg!=05A Output voltage: source Vou 165 | 190 | V 11g1=0.75A Output voltage: sink You 10 «412 |v 11g!=0.5A Output voltage: sink Vou 1 14 Vv Vgl=O.75A Reverse current gs | 300 HA Phase dead time tr 04 03 | 10 | ps figure 1 Forward voltage of diodes | Vey jog fat fv Ipy= 058 to +Vs Yen 095 | 145 |v Tpn= 0.75 A Forward voltage of diodes. | Ve. 095 [145 |v Ip. =05A to ground Vex 40 [12 /V p= 075A Inputs: Enable, Pin 3 (pin 12) and Phase, Pin 2 (pin 11) H-input voltage Viw 2 Vv L-input voltage YW 08 |v H-input current In 50 100 | pA Vw =5V L-input current ch | 100 pA Y= 0V Rise and fall time tet 2 ps Nominal Current, Pin 8 (pin 19) Control range Vig (Visa) oO 2 v Input current =e (“Tys) 5 HA Ve=0V Input offset voltage Vea ° mv figure 3 Actual Current, Pin 4 (pin 9) Regulating range Ma (Vig) i) 2 v figure 3 Turn-off delay tp 2 3 ps figure 4 ‘Sync Input/RC, Pin 7 (pin 18) Syne frequency t 1 100 | kHz | Duty cycle: 0.5 Duty cycle D 04 09 f= 40 kHz Rise and fall time tote 2 bs Output current, pin 7 (pin 18) | -Jg7 (-Jax8)| 1.2 1.6 2.0 mA Trigger threshold, pin 7 Vir Mins) 06 o8 |v figure 2 (pin 18) | Charging limit C; (Cy) Ver Vere) | 22 | 2.4 v Off period torr 64 ps figure 5 Dynamic input resistance Riz (Riss) 1 kQ V,=1.5V pin 7 (pin 18) Vya=15V Siemens Aktiengeselischaft 650

s | xf Z| g ale Gat | | 2 = g Els = az | ¢ = | q 212 : | 8 O DO 4 O . O é =] Sf] Fs = é 55 Siemens Aktiengesellschaft 651

Quiescent Current /, Permissible Power Dissipation P,., Versus Supply Voltage V5 y Versus Case Temperature T n 40, 6 THT i i | Pay 1H Lilt | nf | 3 HT rip | | i | H | —t—4 ta it ah - 8 : t | i i | an i i im | ' [ i | \\! | | TTT 4 PTT a}; 4 \\ 0 0 o Ww 2 3 40 Sov -2 0 2 80 75 100 125 150 175°C —+\\% —=T, Output Saturation Voltages Va, Forward Current /; of Free-Wheeling iy versus Output Current Jo ,, Diodes versus Forward Voltages V- 28 — oa 25 ——T- 3 | ! qT i : MY, TS |, TY ~ at Ye=26V i G : { 20}— page 4 20) Source | | [Diode to} | | Hl I 10 dl 0h} pane fe fe —4 » | | Diode watt} : to round-—t reece | | _| 7=25°C 08a °s lee fp i i | | 0 05 19 15 20 25a 0 0S 10 15 20v —-), —-\\ Siemens Aktiengesellschaft 654

Quiescent Current /, Permissible Power Dissipation P,., na Versus Supply Voltage Vs yversus Case Temperature 7 0-—4——7— CT L aa TT i ! | ko a 1 Pes i i | | i \\ a | \\ | i i hog 20 6 : j ' i an || 1 i tl ! | 0 || 3} | i at SPCR ee pet 5 ol L 0 0 a 30 40 SOV -25 0 25 50 75 100 125 150 175°C —-% —-; ‘Output Saturation Voltages Va: Forward Current I, of Free-Wheeling versus Output current Diodes versus Forward Voltages V; v A ~ Vee 26 pS | | v, 7, 225°C = ro | Met ~Source > = | —— 08 + | sao { ede ri | 725°C ee ee es : | “a i os j | — Ves2bv - Diode T, =25°C {tT to Ground)

05 Sink | 7, =25°C

Sink TT _ o2t—+—f Z |___f - {4 — i i ot ° 0 02 04 06 08 OA 0 os 10 15 20v —-h ey Siemens Aktiengesellschaft 655

| 2100 pF == 100nF Vig Enabte}, 5 lt y TCA 1561B __Phasel> TCA 1560B Nc i cent 5 8 7 6 4 TIL Drive Signals [ ]soxe ae [}i2 eve 5 a Vie Enable 3 {2 y, TCA 1561B A ese'> TCA1560B 4 Nominal a2 Yis | Current} ’ 1 6 4 [ ]sona BP0pF [}ie Siemens Aktiengesellschaft 656

Pulse Diagram for Application Circuit Cae Oe es Oe ee es Ym OLE Lu So | u ui LU Ye t ps1 Ba rs << an >; aay >< ve fee eT 4 — fo: --- 3 — rs | 0s. -05 --- nh | os. =- -05- -- 7 stanaby | Half-Step Oriving f= 0.54 | Half-Step Driving = 1A Calculation of Power Dissipation The total power dissipation P,. comprises Saturation losses P,.. (transistor saturation voltage and diode forward voltages) Quiescent current losses P, (quiescent current multiplied by supply voltage) Switching losses R (turn-on/turn-off operation) The following equations give the power dissipation for chopper operation without phase reversal. This can be regarded as “worst case”, as, in addition to the switching losses, full-load current flows for the entire time. Por= Peat + Py +P with Paap = Tp tVeaty *D + Veo (1 — D) +Veatot Ral -Ve Vs { ip «t lip +i) t I, na Wf tomy lotibtor 4 In ( tort tn] T 2 4 2 | (oor + fore Siemens Aktiengeselischaft 657

1, = Rated current (mean value) ° 1, = Quiescent current ip = Reverse current during turn-on delay time i, = Peak reverse current 01 t, = Conducting time of chop transistor as as toy = Turn-on time L loge = Turn-off time tooy = Turn-on delay time to ore = Turn-off delay time Ls A T = Cycle duration D = Dutycycle t,/T Veaty = Saturation voltage of sink transistor (T3, 4) Pin ¢ Veeto = Saturation voltage of source transistor (T1, 2) [e Veo = Forward voltage of clamp diode (D1, 2) V, = Supply voltage Calculation of Power Dissipation Turn-On Turn-off 5 in ei ke soe iy ce / Yr Yeo rt | Voor ut Veins t f aa = fo ace F— fore ——t fy Characteristics for determining the typical power dissipation during chopper operation without phase reversal. Parameters: Lioag= 10 mH, C, = 820 pF; R, = 33 kQ; Te = 25°C Siemens Aktiengesellschaft 658

Saturation Loss P,,, versus ‘Quiescent Current Loss P,, versus w Phase Current / w Supply Voltage V; 7 10 | ann Cort A Tn fete ty | 5 LL 07 | | Tonge PALL wt jnnnAn Sunny Auee A rH Sey 4neeen w4titi lis ; LI 0 0s 10 _s, 204 0 5 0 1 20 BSP 40, ‘Switching Loss Ps versus Total Power Dissipation P,,, versus. w Phase Current / w Phase Current /

10 TI | ITT yyy TY

0s t+ MRIs) ANE a a, nn ri Paw ||| SEED Ara Hye wat | Lt A CREresisnaneel WFTEE

0 OS 10 2, 20h 0 os 10 2, 204

Siemens Aktiengesellschaft 659