TA7247AP

TA7247AP TOSHIBA | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 12

Technical content

TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC The TA7247AP is a 3 phase Bi-directional supply-voltage- controlled motor driver IC providing all the active functions necessary for switching-regulator-controlled FAN —_— MOTOR of electrical Air conditioner. — a It’s designed for especially energy saving air conditioner ees a | applications and suitable for use any other motor driver N ee <sVi wy} applications. Ney wy | jus It contains 3 phase Bi-directional power driver, CW/CCW \\ | \\ | ° control circuit, comparator and oscillator for switching regulator, and protect circuits. HDIP20-P-3.00 Weight : 8.19g (Typ.) FEATURES. @ Voltage Controlled 3 Phase Bi-Directional Motor Power Driver. @ Output Current Up to 1.5A. @ High Sensitivity of Position Sensing Inputs : Vy = 40 mV (Typ.) © Built in Over Current, Over Voltage, Low Voltage and Thermal Protect Circuit. @ More Power-up Applications with Additional Power Transistors. @ Recommended Supply Voltage : Vcc1 (opr.) = 9~30V Vec2 (opr.) = 4.5~5.5V 980910EBA2 @ TOSHIBA is continually working to improve the quality and the reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fall due to thei inherent electrical sensitivity and, vulnerability to physical stress. itis the responsibilty of the buyer, when utlizing 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 TOSHIBA Semiconductor Reliability Handbook @ The products described in this document are subject to the foreign exchange and foreign trade laws. © ‘he information contained herein is presented only as a guide for the applications, of our products. No_ responsibilty 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. e The information contained herein is subject to change without notice. 1998-12-24 1/12

Fun b= 4-4 - | HT -§_, 1p Veet I uc {7) Lb* OLTAG | De cu bs) sno —_ al asc PIN FUNCTION [PIN No. | SYMBOL FUNCTIONAL DESCRIPTION | 1 | Vout [PWM Output terminal Vcc2 Power supply input terminal Output current detection terminal | 4 | la~___[a-phase lower drive output terminal | 5 | La* __|a-phase upper drive output terminal | 6 | \\b- __[b-phase lower drive output terminal b-phase upper drive output terminal | 8 | tc __|ephase lower drive output terminal ; 9 | te | c-phase upper drive output terminal | 10 | Vcc Drive power supply input terminal [end] en terminal | 12 | He-~ ___[c-phase Hall amp negative input terminal | 13 | Hc* __ |c-phase Hall amp positive input terminal | 14 | Hb i| b-phase Hall amp negative input terminal b-phase Hall amp positive input terminal | 16 | Ha~ __[a-phase Hall amp negative input terminal a-phase Hall amp positive input terminal | 18 | F/R [Normal rotation/reverse rotation switch terminal CR Capacitor connection terminal for reference oscillation Comparator reference voltage input terminal 1998-12-24 2/12

a) Forward rotation mode (Pin® open or 2.5V Min.) Via “@%@) Vib “@%@) Vie la 6 a ee Lb* Ip __ | LJ JL Le? 1@ | ee a ee Via OUTPUT (@+6) Vib OUTPUT (®+®) Vic OUTPUT (@+®) 1998-12-24 3/12

b) Reverse rotation mode (Pin GND or 0.4V Max.) Via OUTPUT @+6) Vib OUTPUT (+) Vic OUTPUT @+®) 1998-12-24 4/12

(1) Design method of switching regulator oscillation circuit (PWM generating circuit) The PWM wave generating circuit that controls the switching regulator output switching transistors is shown in Fig.2. The circuit consists of a triangular waveform generating circuit that generates a comparison signal and a comparator that compares the comparison signal from the triangular waveform generating circuit with output voltage from the switching regulator. (In the example shown in Fig.2, output level is such that “H” level is at Vcc2 level (=5V) and “L” level is typically at 0.5 V as specified in the standard.) In this oscillation circuit, positive feedback is added to the differential comparator to provide hysteresis. "H” and "L” levels of triangular waveform output are expressed, respectively, by the following equations : Vcr MAX. Ra + R3 Vi 32.69V CR Ry RD RZ SOP Ro : Ver MIN. = ——-Vcc21.25V Ry +R2 Q shown in Fig.2 is for a discharge path and Rg decides discharging time constant together with an external capacitor Cf. Vcr MAX. (2.69 V) DISCHARGING TIME IS DECIDED CHARGING TIME 5 « BY Cf AND INTERNAL Rq. Shaw (ven 2600(-Ghe? v) (n= vec2-2780--00) to t Fig.1 Triangular waveform generating circuit output waveform (Pin) Further, oscillation periods to and t; are decided by the following equations : to 5 0.4845-CFR¢ (s) ty = 0.7664-C#-Rq (s) Where, Rg is an internal resistor (=1.3 kQ) Further, as resistance of the resistor Rq in IC varies by about +20%, it is recommended to use Rq4 in actual application at R¢>Rq to suppress internal fluctuation of resistance in IC at the minimum level. 1998-12-24 5/12

FROM THERMAL SHUT DOWN & OVER VOLTAGE PROTECTIVE CIRCUITS Se g faye ae RF cr 5v DC wt Vo AL + ERROR SIGNAL INPUT ¢ Fig.2 PWM waveform generating circuit The comparator circuit consists of a differential amplifier which is operated by PNP differential input. DC level to the C* terminal is decided by DC level at the CR terminal (pin@) and required duty ratio. As DC level at the CR terminal is 1.25~2.67 V as shown in Fig.1, it is recommended to input DC at a level corresponding to DC level at the CR terminal. Further, R¢ and Triangular waveform oscillation period characteristic is shown in Fig.3 and PWM output waveform duty ratio vs. pin@ voltage characteristic in Fig.4. 1998-12-24 6/12

100, 50, 3 * FUL ae x 35) ‘i A An ee 3 ey 4 tT TTT j BLL AT TTT eee toot os a CCITT t= tone P74 | ee | HEHEHE ad 0 erase LIVI TIT .) 30 750 200 200 250 12 13 14 15 16 17 18 19 20 Re (kQ) Vc (Pin®) (vy) Fig.3 R¢—Oscillation period characteristic Fig.4 DUTY RATIO - V¢ characteristics (2) Position detecting circuit (Hall element input circuit) The Position detecting circuit is shown in Fig.5. This circuit consists of a differential amplifier having hysteresis (=20 mV, Typ.). As operating DC level (CMR) is about 1.5V at the lower side and Vcc-1.8V at the upper side, it is recommended to input constant voltage drive from V¢c¢2 at level higher than hysteresis by 3 times or more (60~70 ™mVp-p)- lf the hall element is removed during the rotation, IC can be destructed. 5V DC vec2 ' mh eo eee Fig.5 Position detecting circuit (Hall element input) 1998-12-24 7/12

(3) Forward / reverse rotation selector circuit The forward /reverse rotation selector circuit is shown in Fig.6. The forward rotation (or reverse rotation) is resulted when pin® is opened (or at 2.5V or above), while the reverse rotation (or forward rotation) is resulted at GND (or at 0.4V or below). Yec2 @ sw FIR @ c H H L 7sw ] ccw | cw (R) (F) Fig.6 Forward/reverse rotation selector circuit (4) Output circuit The output circuit is shown in Fig.7. The upper side of the circuit (pins ©, ® and @) is for outlet, whichle the lower side (pins @, © and ®) is for intake. When the built-in output transistors are used, pins @ and ©, © and @, and ® and © shall be shorted, respectively. When transistors are externally mounted for increasing the capacity largely, they shall be connected as shown in Fig.7. ect VM | | PING } PIN@, > : Pd wo be DO > PIN@) PIN® vase Rsc Fig.7 Output circuit 1998-12-24 8/12

(5) Protective circuits a) Over voltage protective circuit If voltage at Vcc1 terminal exceeds normal voltage (38 V), Q2 in Fig.2 is ON to inhibit PWM output and at the same time, the output circuit is OFF. b) Thermal shut down circuit If temperature at the junction point exceeds specified temperature (150°C), similar to a), above, Q2 in Fig.2 in ON to inhibit PWM output and at the same time, the output circuit is OFF. ©) Over current protective circuit If Vesc in Fig.7 exceeds specified voltage (Vrsc = Rsc'lsc), the output circuit is OFF. d) Excessively low voltage protective circuit If voltage at Vccy, terminal drops below specified voltage, the output circuit is OFF. Further, this circuit is a malfunction preventive circuit. 9998-12-24 9/12

MAXIMUM RATINGS (Ta = 25°C) CHARACTERISTIC SYMBOL RATING UNIT Supply Voltage (Motor) Supply Voltage (Control) JOutput Current | I TST A Pp (Note) Operating Temperature -30~70 Storage Temperature [tag | =55=150_ | “C (Note) Tc = 75°C ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Vcc2 = 5V, Ta = 25°C) TEST CHARACTERISTIC SYMBOL TEST CONDITION | nv. [aa UNIT CUIT [Quiescent Current | cc | = I = 0.758 | — | 15] 20] ma | Upper Side} VsaT1 lo =09A | — 7 | 2a | Saturation Voltage lo = 0.75A [— |14] 20 | Vv Lower Side | Vsat2 19 = 0.9A [= | 15 | 23 | lig= 2A id Pr] — | leak curene [UeperSide [yg [=P 00 | [Lower side | yp | —[ oT = YT — TF 10 | pa | [Current Limiter Sensitivity | Vasc __| — [RSC = 0.2.0 [1a0_[ 220 | 300 | mv_| Over Voltage Protector v v Operating Voltage H:SE Thermal Shut-down Operating °, Temperature TTsD 150 C Low Voltage Protector Position Sensing Input Sine wave [Frequency | fo | — [Re = 68kO, Cf = 1000pF] — | 30 | — | Khe | oxcitator [Amplitude [Ag PP | Temperature- T f Hz/°c Coefficient cvo to 2 [Output Current | Icom [—[ | | ~ TT ma Saturation Vottage | Vsat com) — |V@=ov | — | os;—| v | Tum-ONTime [| [=| Sd | 0 | — | Comparator umm-OFF Time | te OP ~~ YT ss | ° [Duty Ratio | Dy | — [Vm =2v dT | SOT ~ | % | Duty Ratio Temperature Tcvo Dy wITC Coefficient 1998-12-24 10/12

Vec2 = 5V fama he ogee | fr a3 | BHHOSOGOOOD

4 TA7247AP

PIN® Vout + Telel | 1] Ti 1 Mi g “zeal }] [1 REGULATOR cont ee es ei a “T ome i Vcc1 (MOTOR DRIVING POWER SUPPLY) (Note) In case of the open-loop control by CPU, rotating speed is controlled by the rotation control signal (analog output) from CPU. However, the closed-loop control by the feedback signal taken from the switching regulator output is also possible. In this case, the connection shall be made as shown in the above circuit diagram. 1998-12-24 11/12

HDIP20-P-3.00 Unit : mm

20 WwW %®

ieee ° L | 35 TI LILtItLI LILI LItLILILI § 1 10 30.5MAX 30.040.2 ooroooooo 0.5+0.1 1.5TYP 1.6401 Weight : 8.19g (Typ.) 1998-12-24 12/12