TOSHIBA TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC TA7267BP BRIDGE DRIVER The TA7267BP is a Bridge Driver for brushed DC Motor Rotation control. Forward Rotation, Reverse Rotation, Stop and Braking operations are available. It's designed for Loading and Reel Motor driver for VCR and Tape Deck, and any other consumer and industrial applications. TA7267BP have Operation Supply Voltage terminal and Motor Driving Supply Voltage terminal independently, therefore Servo control operation is applicable. TA7267BP HSIP7-P-2.544 Weight : 2.15g (Typ.) FEATURES @ Output Current Up to 1.0A (AVE.), and 3.0A (PEAK). @ 4 Function Modes (CW, CCW, STOP and Brake) are Controlled by 2 Logic Signals Fed Into 2 Input Terminals. @ Build in Over Current Protector and Thermal Shut Down Circuit. @ Operating Voltage Range : Vcc (opr.) = 6~18V, Vs (opr.) =0~18V BLOCK DIAGRAM Vec Q) q 6) Vs y Y INN (3) our! CONTROL IN2 (2 THERMAL PROTECT a OVER CURRENT 5) OUT2 4) GND 961001EBA2 TOSHIBA Semiconductor Reliability Handbook. @ TOSHIBA is continually working to improve the quality and the reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent products specifications. Also, please keep in mind the precautions and conditions set forth in the 1997-06-18 1/9TOSHIBA TA7267BP PIN FUNCTION PIN No. SYMBOL FUNCTIONAL DESCRIPTION 1 IN1 Input terminal 2 IN2 Input terminal 3 OUT1 Output terminal 4 GND GND terminal 5 OUT2 Output terminal 6 Vs Voltage supply terminal 7 Vec Voltage supply terminal INTERNAL CIRCUIT VOLTAGE REFERENCE CURRENT SOURCE CONTROL LOGIC 961001EBA2 @ The products described in this document are subject to foreign exchange and foreign trade control laws. @ The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. @ the information contained herein is subject to change without notice. 1997-06-18 2/9TOSHIBA TA7267BP FUNCTION IN1 IN2 OUT1 OUT2 MODE 1 1 L L Brake 0 1 L H cw / CCW 1 8) H L ccw / CW 0 0 High Impedance Stop MAXIMUM RATINGS (Ta = 25C) CHARACTERISTIC SYMBOL RATING UNIT PEAK Vec (MAX) 25 Supply Voltage = operate | Vcc (opr) 18 V PEAK I 3.0 Output Current O (PEAK) A AVE. lo (AVE.) 1.0 Power Dissipation (Tc = 25C) Pp 12.5 WwW Operating Temperature Topr -30~75 C Storage Temperature Tstg -55~150 C 1997-06-18 3/9TOSHIBA TA7267BP ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Ta = 25C) TEST CHARACTERISTIC SYMBOL] CIR- TEST CONDITION MIN. | TYP. | MAX. | UNIT CUIT Vcc = 18V, Output OFF lect Stop mode 18 | 35 Supply Current |Vcc=18V, Output OFF mA Icc2 CW/CCW mode 7 83] 12 lcc3 Vcc = 18V, Brake mode _ 8.5 13 Upper} Vs51U 1.1 Vec = 18V, lo =0.1A Saturation Lower] Vs54L ce Oo [= [9] , Voltage Upper| VsguU | 1.2) 1.5 Lower| VsoL Voc = 18V, Io = 1.0A | 105 | 14 Output Transistor |Upper| IL U 50 Leakage Current |Lower| I, L [s=2ov 50 | * VIN (H) . . 30 | | Input Voltage 1, 2 |7T,=25C, pin and pin@ Vv VIN (L) J _ _ 0.8 Input Current 1, 2 lint, 2 | |Tj=25C, pin@ and pin@ 1 30 LA Diode Forward Voltage YF IF=1A | 20}/ | y io orward Voltag VEL |ip= aT Limiting Current Isc _ _ _ 2.5 _ A Pp - Ta TRANSIENT THERMAL RESISTANCE 16 Rth Rth (ec) = 6C/ W 100 Rth (-a) = 100C /W \ INFINITE HEAT SINK Pp (Ww) 20C/W 8E= 10C/W HEAT SINK X 4 =< HEAT SINK Joearsie | NIN rN NO HEAT SINK fw ~ ~ ~ey \ ee te 0 50 100 150 Ta (C) 200 50 Rth CC/W) 1 0.1 1 10 100 1000 PULSE WIDTH t (s) 1997-06-18 4/9TOSHIBA TA7267BP TEST CIRCUIT 6V sW10 V 1 18v O (V) a + Wa I, = - SW6 av oO x oe if 2 sw. \, (A) at . A3 b f? b 7 SWeg sW4 a Tec 6) _v, o SW3 i S570 a b ~e_@) 3) fb ] a TA7267BP | 0" 161 gay "3 A b ~~ 2 (5) 2 Io 0.14 sWq OUT2 R oe o Rip c bee Ig=1A | SW7 D V2 TEST METHOD ceRieric. | SW | SW2 | Sw3 | SWa | SWs5 | SWe | SW7 | Swe | SWo TEST METER lec CLOSE | OPEN b b a c C a a Icc2 CLOSE | OPEN a b a c c a a lad Use Icc2 CLOSE | OPEN b a a c c a a Icc3 CLOSE | OPEN a a a c c a a Vs1 U | CLOSE | CLOSE} b a b a c a a Io =0.1A Vs1 y | CLOSE| CLOSE|a |b |b |b |< | a | a |1 US 'o Vs1 _ | CLOSE | CLOSE| b a b c b a a V ,lo=0.1A Vs1 | CLOSE| CLOSE| a b b C a a a | V2 Use. lo=0 Vs2 U CLOSE | CLOSE b a c a Cc a a V lo=1A Vso y_| CLOSE | CLOSE] a b C b C a a | V1 Use lo V52 L CLOSE | CLOSE b a c c b a a lo=1A Vso |_| CLOSE | CLOSE] a b c c a a a | V2 Use. lo VTH1 CLOSE | CLOSE a b b c c b a . V F heck Vin2 | CLOSE| CLOSE] b a b c C b a | v3 Use Function Chec Isc CLOSE | CLOSE| a b b c C a b |A3 Use, SW19=CLOSE TNE OPEN | CLOSE a b b c c a a A2 lin2 OPEN | CLOSE| b a b c C a a Use 1997-06-18 5/9TOSHIBA TA7267BP NOTES WHEN USING THE TA7267BP The full bridge driver, TA7267BP, is an IC specifically developed to control rotation switching in brush motors. This IC has been carefully designed and strengthened to withstand counter-electromotive force or start up rush current, which are problems in driving brush motors. However, as with other power ICs, application circuits must be designed not to apply surge voltage or excess current that exceeds the standard values. In addition, when designing PCBs, make sure the wiring pattern does not cause oscillation, which can result in equipment malfunction or destruction of the IC. The following are notes on TA7267BP use. These should be reflected at the design stage. 1. Maximum voltage and current The maximum supply voltage (pins and @) for TA7267BP is 25V. Operating supply voltage is in the range of 6~18V. No voltage exceeding this range should be applied to pins or @. The maximum current is 1.0A (AVE.) or 3.0A (PEAK). The circuit should be designed so that rush current at startup does not exceed peak current, and average current at steady operation does not exceed 1.0A. 2. External diodes As the block diagram shows, TA7267BP has internal diodes. The lower two diodes, which are the ICs internal parasitic diodes, have a relatively large capacitance. However, when a motor with a large reactance such as a core motor is driven, the upper two diodes may be damaged by the motors counter-electromotive force. In such a case, connect external diodes in parallel. The lower diodes should not be subjected to high current. Therefore, in such cases as brake operation, external diodes should be connected. 3. PCB design The following points concern the TA7267BP pattern design around the power supply line (pins and @) and the pattern design of the GND (pin@). a. Ensure that the bypass capacitor between pin, pin@, and GND does not share impedance with other lines. b. The GND line should not be shared by other circuits. c. The capacitance of the bypass capacitor should be as large as possible. 4. Oscillation remedies To prevent noise from sparks when using brush motors, a capacitor may be connected between both pins. When using TA7267BP, the capacitor is connected between output pins @ and . This may cause oscillation. Therefore, avoid connecting the capacitor where possible. If connection is necessary to overcome noise, connect resistors in series as shown in the technical data. The values for the capacitor and resistors must be determined according to the motor. However, recommended values are about 0.1uF and 330). 1997-06-18 6/9TOSHIBA TA7267BP APPLICATION NOTE (1) Input circuit VIN Fig.1 Input circuit is shown in Fig.1. Its a High Active type. If a voltage above specified Vin (H) value fed into input terminal that means Logic 1", and the voltage less than Vin (L) or connect to GND means Logic 0. And the circuit have a hysteresis for stable operation. (See Fig.2) Vec=Vs5=18V Ta=25C me Ta = 75C 0 1.0 1.4 1.8 2.2 2.6 3.0 3.4 OUTPUT VOLTAGE (Vv) INPUT VOLTAGE (V) Fig.2 Vin-VoutT characteristics (2) Basic application circuit +f Vec fe J In| O_(7} TA7267BP INz. O_(] I Fig.3 (Note 1) Fig.3 shows the basic application circuit. Optimum values of the C, R depend on the inherent constant of a motor and parasitic C, R values around the circuit. (Note 2) Utmost care is necessary in the design of the output line, Vg and GND line since IC may be destroyed due to short-circuit between outputs, air contamination fault, or fault by improper grounding. 1997-06-18 7/9TOSHIBA TA7267BP (3) Additional diode i) If the braking operation is so loose, connect a additional diode between each output to GND. (See Fig.4) ii) If the back electromotive pulse generated in output coil is so strong. Internally connected back electromotive suppression diode may be damaged by this pulse. In such a case connect a additional diode between each output to Vcc. (See Fig.5) O Vcc Vcc gd db db a % ap > TA7267BP TA7267BP a Pe a yp a 4 a Fig.4 Fig.5 1997-06-18 8/9TOSHIBA TA7267BP OUTLINE DRAWING HSIP7-P-2.54A Unit : mm 16.0+0.2 @3.240.2 = 0.8+0.2 ae Ot S fo WY HT 12.940.3 16,240.3 0.2 E LTE +041 0.6 -9'06 J L/J Uys ' ' 3 I + 0.88TYP || 0.640.1 [20.25 0) 2.54) 1.20.1 17.0+40.2 / je_son_em_om_ | 1 7 Weight : 2.15g (Typ.) 1997-06-18 9/9