TA84002F TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT MULTI-CHIP TA84002F PWM CHOPPER TYPE 2−PHASE BIPOLAR STEPPING MOTOR DRIVER The TA84002F is designed to drive both windings of a two−phase bipolar setpping motor. FEATURES l Internal PWM current control l Wide range of operating supply voltage VM (motor) : 10 V to 30 V VCC (control) : 4.5 V to 5.5 V l Output current : 1.0 A (peak) l Multichip IC consisting of four P−channel MOSFETs and one main chip. l Full−step and half−step are available Weight : 0.79 g (Typ.) l Internal thermal−shutdown circuit l Package : HSOP20−P−450−1.00 Note1: This product has a multichip (MCP) structure utilizing Pch MOS technology. Take care when handling because Pch MOS has low electrostatic resistance. PIN ASSIGNMENT 1 2001-09-06 TA84002F BLOCK DIAGRAM TRUTH TABLE X: PHASE ENABLE OUT (+) OUT (−) X H OFF OFF H L H L L L L H Don’t care 2 2001-09-06 TA84002F OUTPUT STAGE l The TA84002F is Multichip IC consisting of four P−channel MOSFETs and one main chip. l Four P−channel MOSETs are used as upper−side power transistors. l Output current is controlled by swiching lower−side transistor. l Durin CHOP ON, the current flows through P−channel MOS, The motor winding, sink transistor and sense resistor. l During CHOP OFF, the current circulates the motor winding, P−channel MOS and the diode of P−channel MOS. l Power dissipation is divided by the five chips. : (1) CHOP ON (Drive Mode) Q1: ON, Q2: OFF Q3: OFF, Q4: ON : (2) CHOP OFF (Slow Decay) Q1: ON, Q2: OFF Q3: OFF, Q4: OFF : (3) ALL OFF (Fast Decay) 3 2001-09-06 TA84002F PWM CURRENT CONTROL Output current is sensed and cotrolled independently in each bridge by an external sense resistor (RFN), internal comparator, and mono−stable multi−vibrator. When the bridge is turn ON, current increases in the motor winding and flows through the external sense resistor until the sense voltage (VNF) reaches the level set at the comparator’ s input: Vref / 5 The comparator then triggers the mono−stable, which turn OFF the lower transistor of the bridge. The OFF time is determined by the mono−stable’ s external RC timing components. tOFF ≈ 1.1 CR The value of the current limiting (IO) is approximated by IO = (Vref / 5) / RNF−0.05 4 2001-09-06 TA84002F TIMING CHART (1) Full Step 5 2001-09-06 TA84002F (2) Half Step 6 2001-09-06 TA84002F MAXIMUM RATINGS (Ta = 25°C) CHARACTERISTIC SYMBOL RATING UNIT Supply Voltage (Motor) VM 35 V Supply Voltage (Control) VCC 7 V Output Current IO 1.0 A / ch Input Voltage VIN GND − 0.4 to VCC + 0.4 V V Power Dissipation PD 2.5 (Note) W Operating Temperature Topr −30 to 85 °C Storage Temperature Tstg −55 to 150 °C Note: This rating is obtained by mounting on 50 × 50 × 1.6 mm PCB that occupied above 60% of copper. RECOMMENDED OPERATION CONDITION (Ta = −30 to 85°C) SYMBOL TEST CIR− CUIT Supply Voltage (Control) VCC Supply Voltage (Motor) CHARACTERISTIC MIN TYP. MAX UNIT ― 4.5 5.0 5.5 V VM ― 10 24 30 V Output Current IO ― ― ― 0.8 A / ch Input Voltage VIN ― GND ― VCC V Reference Voltage Vref ― 1.2 2.5 VCC − 0.5 V fPWM ― 15 30 50 kHz PWM Frequency TEST CONDITION PHASE, ENABLE 7 2001-09-06 TA84002F ELECTRICAL CHARACTERISTICS (Ta = 25°C, VCC = 5 V, VM = 24 V) CHARACTERISTIC SYMBOL TEST CIR− CUIT TEST CONDITION MIN TYP. MAX 2.0 ― VCC + 0.3 V GND − 0.3 V ― 0.8 PHASE, ENABLE, VIN = 5 V ― 2 20 PHASE, VIN = GND ― 0 1 ENABLE, VIN = GND ― 55 100 VIN(H) Input Voltage 1 PHASE, ENABLE VIN(L) IIN(H) Input Current IIN(L) 2 IIN(L) ICC1 3 ENABLE A / B = Low 2−Phase 100% ON ― 110 180 ICC2 4 ENABLE A / B = Low 2−Phase 100% OFF ― 6 14 ICC3 3 ENABLE A = Low, B = High 1−Phase 100% ON ― 55 90 ICC4 4 ENABLE A = Low, B = High 1−Phase 100% OFF ― 6 14 3 ENABLE A / B = High 2−Phase OFF ― 6 14 ENABLE A / B = Low 2−Phase ON ― 5 13 ENABLE A = Low, B = High 1−Phase ON ― 4.5 11 ENABLE A / B = High 2−Phase OFF ― 4 9 IO = 0.5 A ― 0.35 0.8 IO = 1.0 A ― 0.65 2.0 Supply Current ICC5 IM1 IM2 5 IM3 UNIT V µA mA Output Saturation Voltage (Lower−side) VSAT1 ON Resistor (Upper−side) Ron1 7 IO = 0.5 A ― 0.6 1.0 Ω Diode Forward Voltage (Lower−side) VF(L) 8 IF = 1.0 A ― 1.4 2.0 V Diode Forward Voltage (Upper−side) VF(H) 9 IF = 1.0 A ― 0.95 1.8 V Reference Voltage Range Vref ― 1.0 2.5 VCC − 0.5 V Reference Current Iref 10 Vref = 2.5 V ― 0.2 5 µA GAIN 11 VNF / Vref 0.17 0.2 0.23 Setting Current Iset ― Vref = 2.5 V, RNF = 1 Ω 0.35 0.45 0.55 A Thermal Shutdown Temperature TSD ― Tj ― 165 ― °C ∆T ― ― 15 ― °C ― 0 100 ― 0 50 530 730 Reference Divider Ratio Thermal Shutdown Hysteriesis Output Leakage Current Pch MOS Drive Current VSAT2 IL (H) IL (L) IG 6 12 P−channel MOS 13 330 8 V µA µA 2001-09-06 TA84002F TEST CIRCUIT 1. VIN (H), VIN (L) 2. IIN (H), IIN (L) 9 2001-09-06 TA84002F 3. ICC1, ICC3, ICC5 4. ICC2, ICC4 10 2001-09-06 TA84002F 5. IM1, IM2, IM3 6. VSAT1, VSAT2 11 2001-09-06 TA84002F 7. Ron1 8. VF (L) 12 2001-09-06 TA84002F 9. VF (H) 10. Iref 13 2001-09-06 TA84002F 11. Iset 12. IL (H), IL (L) 14 2001-09-06 TA84002F 13. IG 15 2001-09-06 TA84002F APPLICATION CIRCUIT In case of IOUT = 0.5 A Note 1: Capacitor for noise suppression to be connected between the Power Supply (VCC, VM, Vref) and GND to stabilize the operation. Note 2: Utmost care is necessary in the design of the output line, VM and GND line since IC may be destroyed due to short-circuit between outputs, air contamination fault, or fault by improper grounding. 16 2001-09-06 TA84002F PACKAGE DIMENSIONS HSOP20−P−450−1.00 Unit : mm Weight : 0.79 g (Typ.) 17 2001-09-06 TA84002F RESTRICTIONS ON PRODUCT USE 000707EBA · TOSHIBA is continually working to improve the quality and 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 comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products 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 TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc.. · The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer’s own risk. · The products described in this document are subject to the foreign exchange and foreign trade 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. 18 2001-09-06