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TA7289P/F/FG
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA7289P,TA7289F/FG
PWM STEPPING MOTOR DRIVER
The TA7289P, TA7289F/FG are PWM solenoid driver designed especially for use high efficiency stepping motor control. It consist of 1.5A peak current drive capable output full bridge driver, oscillation circuit for PWM switching, 4bit D-A for output current control and TTL compatible input circuit.
FEATURES
Wide Range of Operating Voltage : VCC (opr.) Min. = 6~27 V High Current Capability: IO Max = 1.5 A (PEAK) LS-TTL Compatible Control Inputs (IN A, IN B) Few External Components Required. Build-in 4bit DAC. TA7289F/FG
The TA7289FG is a Pb-free product. The TA7289P is Sn plated product including Pb. The following conditions apply to solderability: *Solderability 1. Use of Sn-37Pb solder bath *solder bath temperature = 230C *dipping time = 5 seconds *number of times = once *use of R-type flux 2. Use of Sn-3.0Ag-0.5Cu solder bath *solder bath temperature = 245C *dipping time = 5 seconds *the number of times = once *use of R-type flux
Weight HDIP14-P-500-2.54A : 3.00g (Typ.) HSOP20-P-450-1.00 : 0.79g (Typ.)
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TA7289P/F/FG
BLOCK DIAGRAM
TA7289P / TA7289F/FG
Note:
Pin (1), (4), (6), (8), (11), (13) of TA7289F/FG are all NC (Non-connection)
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PIN FUNCTION
PIN No. P 1 2 3 4 5 6 7 8 9 10 11 12 13 14 FIN F/FG 20 2 3 5 7 9 10 12 14 15 16 17 18 19 FIN PIN SYMBOL Vref IN B IN A COSC NF OUT B VI OUT A GND VCC 2 2 2 2
0 1 2 3
FUNCTIONAL DESCRIPTION NF voltage supply input terminal Signal input terminal Signal input terminal Function
Internal oscillation frequency input terminal Output current detection terminal Output B terminal Comparator input terminal Output A terminal GND terminal Power voltage supply terminal D / A input terminal D / A input terminal D / A input terminal D / A input terminal GND terminal
GND
Note:
Pin (1), (4), (6), (8), (11), (13) of TA7289F/FG are all NC (Non-connection)
FUNCTION
IN A L H L H IN B L L H H OUT A OFF H L OFF OUT B OFF L H OFF STOP CW / CCW CCW / CW STOP MODE
INPUT CIRCUIT (IN A, IN B)
Input circuit is shown in Fig.1 IN A and IN B are TTL compatible "Low Active" type and have a hysteresis of 0.8 V Typ at Tj = 25C.
TA7289P / TA7289F/FG
Fig. 1
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TA7289P/F/FG
D / A AND Vref CIRCUIT
TA7289P / TA7289F/FG
Fig. 2
IDO of current mode DAC output is proportional to multipled voltage of Vref (PIN (1) (or (20))) and DAC inputs. DAC inputs are all "low active" type and required input current of 300 A MIN for each input terminal.
OSC AND COMPARATOR
TA7289P / TA7289F/FG
Fig. 3
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TA7289P/F/FG
Sawtooth OSC circuit consists of Q1 through Q4 and R1 through R3. R1 and R2 are voltage divider of 5 V build-in regulator. Q1 is turned "off" when V4 is less than the voltage of 2.5 V + VBE Q4 + VBE Q3 approximately equal to 3.8 V. V4 is increased by C1 charging of I4. Q1 and Q2 are turned "ON" when V4 becomes V4 - H level. Lower level of V4 (V4 - L) is equal to VBE Q4 + VBE Q3 + VSAT Q1 approximately equal to 1.5 V. V4 is calculated by following equation. V4 = 5*(1 - e -
1 *t) .................................................(1) C1*R3
Assuming that V4 = 1.5 V (t = t1) and=3.8 V (t = t2). C1 is external capacitance connected to Pin (4) (or (5)) and R3 is on-chip 20 k resistor. Therefore, OSC frequency is calculated as follows. t1 = -C1*R3*1n (1 -
1.5 ) ................................................(2) 5
3.8 )................................................(3) 5
t2 = -C1*R3*1n (1 - fOSC =
1 t1 - t 2
=
1 1.5 3.8 C1* ( R 3*1n (1 - ) - R 3*1n (1 - )) 5 5
=
1 (kHz) (Unit of C1 is F) 21.4 C1
ABSOLUTE MAXIMUM RATINGS (Ta = 25C)
CHARACTERISTIC Supply Voltage SYMBOL VCC Vref VIN VI TA7289P Output Current TA7289F/FG TA7289P TA7289F/FG Power Dissipation Operating Temperature Storage Temperature TA7289P TA7289F/FG IO (MAX.) RATING 30 30 7 2 1.5 0.8 0.7 0.3 2.3 1.0 -30~85 -55~150 W C C A V UNIT
Reference Voltage
IO (AVE.)
PD (Note) Topr Tstg
Note:
NO HEAT SINK
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ELECTRICAL CHARACTERISTICS (Unless otherwise specified, VCC = 24 V, Ta = 25C)
CHARACTERISTIC SYMBOL ICC1 ICC2 Quiescent Current ICC3 ICC4 Output Voltage Input Hysteresis Width VIN (H) VIN (L) VIN IIN1 Input Current IIN2 VSAT U-1 VSAT L-1 Output Saturation Voltage VSAT U-2 VSAT L-2 VSAT U-3 VSAT L-3 Control Supply Voltage Control Supply Current Diode Forward Voltage Vref Iref VFU VFL IL-U IL-L INF VCC2 ROSC 2 4 Vref = 0~2.0 V IF = 1.5 A VL = 30 V VL = 30 V Source type VNF = 0~2.0 V Tj = 0~125C Tj = 0~125C 3 2 2 2 1 TEST CIR- CUIT TEST CONDITION CW / CCW STOP CW / CCW mode, 2 ~2 : H CW / CCW mode, 2 ~2 : L IN A IN B, Source type. IN A, IN B VIN = 0 V Source type 2 ,2 ,2 ,2 Source type
0 1 2 3 0 3 0 3
MIN 12 12
TYP. 20 20 20 23 0.8 25 160 1.1 0.8 1.2 0.9 1.8 1.2 25 2.6 0.8 300 5 20
MAX 30 30 30 32 7.0 0.8 35
UNIT
Output : Open
12 13 2.0 -0.4 90
mA
V V
VIN = 0 V
A 200 1.5 1.1 1.7 1.3 2.6 1.9 2.0 35 3.3 1.1 50 50 490 32 V A V V
IOUT = 0.2 A
IOUT = 0.7 A
IOUT = 1.5 A
GND 180 13
Output Leakage Current NF Terminal Current Internal Supply Output Voltage Resistor for Oscillation (R3)
5 6 6 6
A A V k
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TEST CIRCUIT 1
ICC1, 2, 3, 4
TA7289P/F/FG
TA7289P / TA7289F/FG
TEST CIRCUIT 2 VIN (H), (L), IIN1, 2, VIN, Iref
TA7289P/F/FG
TA7289P / TA7289F/FG
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TEST CIRCUIT 3
VSAT U1, L1, U2, L2, U3, L3
TA7289P/F/FG
TA7289 / TA7289F/FG
Note:
Calibrate IOUT to 0.2A / 0.7A / 1.5A by RL
TEST CIRCUIT 4
VFU, VFL
TA7289P/F/FG
TA7289 / TA7289F/FG
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TEST CIRCUIT 5
IL-U, IL-L
TA7289P/F/FG
TA7289P / TA7289F/FG
TEST CIRCUIT 6
INF, VCC2, ROSC
TA7289P/F/FG
TA7289P / TA7289F/FG
Note:
ROSC =
VCC2 (V ) () I OSC (A )
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TEST CIRCUIT 7 IOUT - Vref CHARACTERISTIC, IOUT - D / A CHARACTERISTIC
TA7289P/F/FG
TA7289P / TA7289F/FG
TEST CIRCUIT 8 ICC - FREQUENCY CHARACTERISTIC
TA7289P/F/FG
TA7289P / TA7289F/FG
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TA7289F/FG
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APPLICATION CIRCUIT 1
TA7289P / TA7289F/FG
Note 1: Connect if required. Note 2: Recommended RF value is approximately 200 . And CF value is concerned with the OSC frequency. We recommend to select optimum value of CF under the experimental consideration of noise cutting and time delay characteristics. Note 3: Utmost care is necessary in the design of the output, VCC, VM, and GND lines since the IC may be destroyed by short-circuiting between outputs, air contamination faults, or faults due to improper grounding, or by short-circuiting between contiguous pins.
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APPLICATION CIRCUIT 2 (PWM chopper stepping motor driver)
TA7289P / TA7289F/FG
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PACKAGE DIMENSIONS
HDIP14-P-500-2.54A Unit: mm
Weight: 3.00 g (Typ.)
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PACKAGE DIMENSIONS
HSOP20-P-450-1.00 Unit: mm
Weight: 0.79 g (Typ.)
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Notes on Contents
1. Block Diagrams
Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for explanatory purposes. The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes. Timing charts may be simplified for explanatory purposes. The application circuits shown in this document are provided for reference purposes only. Thorough evaluation is required, especially at the mass production design stage. Toshiba does not grant any license to any industrial property rights by providing these examples of application circuits. Components in the test circuits are used only to obtain and confirm the device characteristics. These components and circuits are not guaranteed to prevent malfunction or failure from occurring in the application equipment.
2. Equivalent Circuits
3. Timing Charts
4. Application Circuits
5. Test Circuits
IC Usage Considerations
Notes on handling of ICs
[1] The absolute maximum ratings of a semiconductor device are a set of ratings that must not be exceeded, even for a moment. Do not exceed any of these ratings. Exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result injury by explosion or combustion. [2] Use an appropriate power supply fuse to ensure that a large current does not continuously flow in case of over current and/or IC failure. The IC will fully break down when used under conditions that exceed its absolute maximum ratings, when the wiring is routed improperly or when an abnormal pulse noise occurs from the wiring or load, causing a large current to continuously flow and the breakdown can lead smoke or ignition. To minimize the effects of the flow of a large current in case of breakdown, appropriate settings, such as fuse capacity, fusing time and insertion circuit location, are required. [3] If your design includes an inductive load such as a motor coil, incorporate a protection circuit into the design to prevent device malfunction or breakdown caused by the current resulting from the inrush current at power ON or the negative current resulting from the back electromotive force at power OFF. IC breakdown may cause injury, smoke or ignition. Use a stable power supply with ICs with built-in protection functions. If the power supply is unstable, the protection function may not operate, causing IC breakdown. IC breakdown may cause injury, smoke or ignition. [4] Do not insert devices in the wrong orientation or incorrectly. Make sure that the positive and negative terminals of power supplies are connected properly. Otherwise, the current or power consumption may exceed the absolute maximum rating, and exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result injury by explosion or combustion. In addition, do not use any device that is applied the current with inserting in the wrong orientation or incorrectly even just one time.
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Points to remember on handling of ICs
(1) Heat Radiation Design In using an IC with large current flow such as power amp, regulator or driver, please design the device so that heat is appropriately radiated, not to exceed the specified junction temperature (TJ) at any time and condition. These ICs generate heat even during normal use. An inadequate IC heat radiation design can lead to decrease in IC life, deterioration of IC characteristics or IC breakdown. In addition, please design the device taking into considerate the effect of IC heat radiation with peripheral components. (2) Back-EMF
When a motor rotates in the reverse direction, stops or slows down abruptly, a current flow back to the motor's power supply due to the effect of back-EMF. If the current sink capability of the power supply is small, the device's motor power supply and output pins might be exposed to conditions beyond maximum ratings. To avoid this problem, take the effect of back-EMF into consideration in system design.
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