 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| INTEGRATED CIRCUITS TDA5146T Brushless DC motor drive circuit Product specification 1994 May 18 Philips Semiconductors Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T FEATURES * Full-wave commutation (using push/pull drivers at the output stages) without position sensors * Built-in start-up circuit * Three push-pull outputs: - 2 A output current (Typical) - Built-in current limiter * Thermal protection * Soft switching outputs * Flyback diodes * Tacho output sensor * Brake function * Direction control input * Reset function * FET driver stage to be used in a buck converter APPLICATIONS General purpose spindle driver (e.g., HDD, tape driver) GENERAL DESCRIPTION The TDA5146T is a bipolar integrated circuit used to drive brushless DC motors in full-wave mode. The device senses the rotor position using an EMF -sensing technique and is ideally suited as a drive circuit for a hard disk drive motor or tape drive. QUICK REFERENCE DATA Measured over full voltage and temperature ranges Symbol VP Vsup VVMOT VDo ILIM Parameter Supply voltage range (Note 1) Supply for the FET driver voltage range Input voltage to the output driver stages (see Fig. 1) Driver output voltage drop IO= 100 mA Current limiting Min. 4 4 1.7 - 1.80 Typ. - - - 0.9 2.0 Max. 18 18 16 1.05 2.5 Unit V V V V A NOTES: 1. An unstabilized supply can be used 2. VVMOT=VP ; all outputs IO = 0 mA ORDERING AND PACKAGE INFORMATION Type number n mber TDA5146T Package Name SO28 Description plastic small outline package; 28 leads; body width 7.5 mm Version SOT136-1 1994 May 18 2 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T VSUP PWMOUT BRAKE RESET VMOT GND2 VP GND1 Figure 1. Block diagram 1994 May 18 3 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T PINNING Symbol CAP-CDS CAP-ST CAP-TI GND PWMOUT VSUP PWM_IN RESET MOT3 NC MOT0 GND1 MOT1 TEST NC MOT2 VMOT BRAKE DIR FG GND2 VP CAP-CDM Pin 1 2 3 4 5 6 7 8 9 10,11,12 13 14 15 16 17,18,19,20 21 22 23 24 25 26 27 28 Description external capacitor connection for adaptive commutation delay timing copy external capacitor connection for start-up oscillator external capacitor connection for timing ground supply for the FET driver stage FET driver stage output positive supply for the FET driver stage FET driver stage input reset input driver output 3 not connected input from the star point of the motor coils ground (0 V) motor supply return for output stages driver output 1 test input/output not connected driver output 2 input voltage for the output driver stages brake input direction control input frequency generator: output of the rotation speed and position detector stages (open collector digital output, negative - going edge is valid) ground supply return for control circuits positive supply voltage external capacitor connection for adaptive commutation delay timing NOTE: 1. Pins 10,11,12,17,18,19 have to be connected to the ground for higher dissipation CAP-CDS CAP-ST CAP-TI GND PWMOUT VSUP PWM_IN RESET MOT3 1 2 3 4 5 6 7 8 9 28 CAP-CDM 27 VP 26 GND2 25 FG 24 DIR 23 BRAKE 22 VMOT 21 MOT2 20 NC 19 NC 18 NC 17 NC 16 TEST 15 MOT1 NC 10 NC 11 NC 12 MOT0 13 GND1 14 SL01520 Figure 2. Pin configuration 1994 May 18 4 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T FUNCTIONAL DESCRIPTION The TDA5146T offers a sensorless three phase motor drive function. It is unique in its combination of sensorless motor drive and full-wave drive. The TDA5146T offers protected outputs capable of handling high currents and can be used with star or delta connected motors. It can easily be adapted for different motors and applications. The TDA5146T offers the following features: * Sensorless commutation by using the motor EMF * Built-in start-up circuit * Optimum commutation, independent of motor type or motor loading * Built-in flyback diodes * Three phase full-wave drive * High output current (1.8 A) * Outputs protected by current limiting and thermal protection of each output transistor * Low current consumption by adaptive base-drive * Soft switching pulse output for low radiation. * Accurate frequency generator (FG) by using the motor BMF * Direction of rotation controlled by one pin. * FET driver stage to be used in a buck converter LIMITING VALUES In accordance with the Absolute Maximum System (IEC 134). Symbol VP, Vsup VI VVMOT VO VO VI Tstg Supply voltage Input voltage; all pins except VMOT (VI <18 V) VVMOT input voltage Output voltage; PWM_OUT and PG/FG Output voltage MOT0, MOT1, MOT2 and MOT3 Input voltage CAP-ST, CAP-TI, CAP-CD and CAP-DC Storage temperature range Operating ambient temperature range Total power dissipation Parameter Min - -0.3 -0.5 GND -1 - -55 0 - 18 Max V V V V V V C C - VP+0.5 17 VP VVMOT + VD 2.5 +150 70 - Unit Tamb Ptot HANDLING Every pin withstands the ESD test according to MIL-STD-883C cross 1. Method 3015 (HBM 1500W, 100 pF 3 pulses + and 3 pulses - on each pin referenced to ground. 1994 May 18 5 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T 3.5 3.0 2.5 Ptot (H) 2.0 1.5 1.0 0.5 0 0 10 20 30 40 50 60 70 Tamb (o) SL01519 Figure 3. Power derating curve (SOT136-1) 1994 May 18 6 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T CHARACTERISTICS VP = 14.5 V; Tamb = 25 C; unless otherwise specified Symbol Supply VP IP VVMOT IVsup Supply voltage range Input current range Input voltage to the driver output stages range Vsup current range note 1 note 2 see Figure 1 Vsup = 12 V 4 - 1.7 - - 5.9 - 1.2 18 7.5 16 2.0 V mA V mA C C Parameter Conditions Min Typ Max Unit Thermal protection TSD DT Local temperature at temperature sensor causing shut-down Reduction in temperature before switch-on after shut-down 130 - 140 TSD-30 150 - MOT0 - CENTER TAPE VI II VCSW DVCS VH Input voltage range Input bias current Comparator Switching Level Variation in threshold voltage between comparators Comparator input hysteresis 0.5 V VDLF Diode forward voltage (DL) -1.5 - - V IDM DIR VIH VIL IIL IIH RESET VIH VIL IIH IIL Peak diode current - - 2.5 A Normal rotation voltage on pin 5 Reverse rotation voltage on pin 5 Reverse rotation current Normal rotation current 4V< VP <18V 4V - - -20 -20 - 0.8 - - V V mA mA V V mA mA Input voltage HIGH in reset mode Input voltage LOW in normal mode Input current HIGH Input current LOW 4V< VP <18V 4V - - -20 -20 - 0.8 - - 1994 May 18 7 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T Symbol BRAKE VIH VIL IIH IIL FG VOL VOHmax tTHL Parameter Input voltage HIGH in brake mode Input voltage LOW in normal mode Input current HIGH Input current LOW Conditions 4V< VP <18V 4V Typ - - -20 -20 Max - 0.8 - - Unit V V mA mA V V mS Output voltage LOW Maximum output voltage HIGH Transition time - VP - - - 0.5 0.4 - - Ratio of FG frequency and commutation frequency d PWM_IN VIH VIL IIH IIL PWMOUT V0H VOL Ipwmoutsource PWM Output HIGH PWM Output LOW Sourcing capability PWM IN <=2.0V PWM IN >-0.8V PWMOUT= 10 9.5V 9V PWMOUT=1V Rs=51 W C1=2nF High Level Input Low Level Input High Level Input Current Low Level Input Current 4V 1:2 50 - - % 2.0 - -3 -20 - - 0 -3 - 0.8 3 - V V mA mA V V Vsup- 0.7 - - - - 0.7 5 15 30 25 - - 100 - - mA mA mA mA V/ mS Ipwmoutsink SR CAP-ST II IO VSWL VSWM VSWH CAP-TI II IOH IOL VSWL VSWM VSWH sinking capability PWM Output Slew Rate Output sink current Output source current Lower switching level Middle switching level Upper switching level 1.6 -2.6 - - - 2.1 -2.1 0.20 0.30 2.20 2.6 -1.6 - - - mA mA V V V mA mA mA mV V V Output sink current Output source current HIGH Lower source current LOW Lower switching level Middle switching level Upper switching level - - - - - - 28 -57 -5 50 0.30 2.20 - - - - - - 1994 May 18 8 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T Symbol CAP-CDM lI IO II/IO VIL VIH CAP-CDS II IO II/IO VIL VIH Parameter Output sink current Output source current Ratio of sink to source current Input voltage level LOW Input voltage level HIGH Conditions Min 10.6 -5.3 1.85 0.85 2.3 Typ 16.2 -8.1 2.05 - 2.4 Max 22 -11 2.25 0.9 2.55 Unit mA mA V V mA mA mA V V Output sink current Output source current Ratio of sink to source current Input voltage level LOW Input voltage level HIGH 10.1 -20.9 0.9 0.85 2.3 15.5 -15.5 1.025 - 2.4 20.9 -10.1 1.15 0.9 2.55 NOTES: 1. An unstabilized supply can be used. 2. VMOT = VP, all other inputs at 0V; all outputs at VP and IO = 0mA. 3. Switching levels with respect to MOT1, MOT2 and MOT3. See Figure 4. 4. Drivers are in high impedance OFF-state. 5. The outputs are short-circuit protected by limiting the current and the IC temperature. 6. Output transition time measurement. See Figure 5. Hysteresis 75 mV typ MOT 1 MOT 2 and MOT 3 Comparators threshold voltage Figure 4. 12.5 V 12.5 V 2V Tr Tf 2V Figure 5. 1994 May 18 9 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T 1. Value selected for 3 HZ start-up oscillator frequency Figure 6. Application diagram without use of the FET driver stage APPLICATION INFORMATION Introduction Full-wave driving of a three phase motor requires three push-pull output stages. In each of the six possible states two outputs are active, one sourcing and one sinking current. The third output presents a high impedance to the motor which enables measurement of the motor EMF in the corresponding motor coil by the EMF comparator at each output. The commutation logic is responsible for control of the output transistors and selection of the correct EMF comparator. The zero-crossing in the motor EMF (detected by the comparator selected by the commutation logic) is used to calculate the correct moment for the neat commutation, that is, the change to the next output state. The delay is calculated (depending on the motor loading) by the adaptive commutation delay block. Because of high inductive loading the output stages contain flyback diodes. The output stages are also protected by a current limiting circuit and by thermal protection of the six output transistors. The zero-crossings can be used to provide speed information such as the tacho signal FG. 1994 May 18 10 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T +12 V MOSFET P 100 mF + 128 mH SCHOTTKY + + 8.1 mF 100 mF VSUP PWMOUT BRAKE RESET PWM_IN FET DRIVER STAGE BRAKE RESET 220 nF START-UP OSCILLATOR 18 nF ADAPTIVE COMMUTATION DELAY 18 nF TEST 10 nF THERMAL PROTECTION TIMING COMMUTATION LOGIC MOTOR FG to micro- processor DIVIDE BY 2 4.7 kW +5 V ROTATION SPEED/ DETECTOR OUTPUT STAGE DIRECTION CONTROL TDA5146T EMF COMPARATORS DIR SL01521 Figure 7. Typical Application diagram of the TDA5146T with use of the FET driver stage 1994 May 18 11 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T The system will only function when the EMF voltage from the motor is present. Therefore, a start oscillator is provided that will generate commutation pulses when no zero-crossings in the motor voltage are available. A timing function is incorporated into the device for internal timing and for timing of the reverse rotation detection. The TDA5146T is designed for systems with low current consumption: use of I2 L logic, adaptive base drive for the output transistors (patent pending). Adjustments The system has been designed in such a way that the tolerances of the application components are not critical. However, the approximate values of the following components must still be determined: * The start capacitor; this determines the frequency of the start oscillator * The two capacitors in the adaptive commutation delay circuit. These are important in determining the optimum moment for commutation, depending on the type and loading of the motor * The timing capacitor; this provides the system with its timing signals * Three external, damping RC-combinations that can be used to reduce BF interference and acoustic noise from the motor The Start Capacitors (CAP-ST) This capacitor determines the frequency of the start oscillator. It is charged and discharged, with a current of 2 mA, from 0.05 V to 2.2 V and back to 0.05 V. The time taken to complete one cycle is given by: tstart = (2.15 C)s (with C in mF) The start oscillator is reset by a commutation pulse and so is only active when the system is in the start-up mode. A pulse from the start oscillator will cause the outputs to change to the next state (torque in the motor). If the movement of the motor generates enough EMF the TDA5146T will run the motor. If the amount of EMF generated is insufficient, then the motor will move one step only and will oscillate in its new position. The amplitude of the oscillation must decrease sufficiently before the arrival of the next start pulse, to prevent the pulse arriving during the wrong phase of the oscillation. The oscillation of the motor is given by: f OSC + (0.5 p) where: (K t I p J) 1 2 Kt = torque constant (N.m/A) I = current (A) p = number of magnetic pole-pairs J = inertia J (kg/m2) Example: J = 72 10-6 kg/M2, K = 25 10- 3 N.m/A, p = 6 and I = 0.5 A; this gives fosc = 5 Hz. If the damping is high then a start frequency of 2 Hz can be chosen or t = 500 ms, thus C = 0.5/2 = 0.25 mF, (choose 220 nF). The Adaptive Commutation Delay (CAP-CDM and CAP-CDS) In this circuit capacitor CAP-CDM is charged during one commutation period, with an interruption of the charging current during the diode pulse. During the next commutation period this capacitor (CAP-CDM) is discharged at twice the charging current. The charging current is 8.1 mA and the discharging current 16.2 mA ; the voltage range is from 0.9 to 2.2V. The voltage must stay within this range at the lowest commutation frequency of interest, fc1: C=8.1-6 / f 1.3=6231/fC1 (C in nF) If the frequency is lower, then a constant commutation delay after the zero-crossing is generated by the discharge from 2.2 to 0.9V at 16.2 mA. maximum delay = (0.076 x C) ms (with C in nF) Example: nominal commutation frequency = 900 Hz and the lowest usable frequency = 400 Hz, so: CAP-CDM = 6231 / 400 = 15.6 (choose 18 nF) The other capacitor, CAP-CDS, is used to repeat the same delay by charging and discharging with 20 mA. The same value can be chosen as for CAP-CDM. Figure 8 illustrates typical voltage waveforms. 1994 May 18 12 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T voltage on CAP-CDM voltage on CAP-CDS SL01522 Figure 8. CAP-CDM and CAP-CDS voltage waveform in normal running mode The Timing Capacitor (CAP-TI) Capacitor CAP-TI is used for timing the successive steps within one commutation period; these steps include some internal delays. The most important function is the watchdog time in which the motor EMF has to recover from a negative diode-pulse back to a positive EMF voltage (or vice versa). A watchdog timer is a guarding function that only becomes active when the expected event does not occur within a predetermined time. The EMF usually recovers within a short time if the motor is mining normally ( << ms ). However, if the motor is motionless or rotating in the reverse direction, then the time can be longer ( >> ms ). A watchdog time must be chosen so that it is long enough for a motor without EMF (still) and eddy currents that may stretch the voltage in a motor winding; however, it must be short enough to detect reverse rotation. If the watchdog time is made too long, then the motor may run in the wrong direction (with little torque). The capacitor is charged, with a current of 57 mA, from 0.2 to 0.3V. Above this level it is charged, with a current of 5 mA, up to 2.2 V only if the selected motor EMF remains in the wrong polarity (watchdog function). At the end, or, if the motor voltage becomes positive, the capacitor is discharged with a current of 28 mA. The watchdog time is the time taken to charge the capacitor, with a current of 5 mA, from 0.3 to 2.2V. The value of CAP-T1 is given by: C=5 10-6 tm/1.9-2.63 tm (C in nF; t in ms) Example: If after switching off, the voltage from a motor winding is reduced, in 3.5 ms, to within 20 mv (the offset of the EMF comparator), then the value of the required timing capacitor is given by: C = 2.63 3.5 = 9.2 (choose 10 nF) Typical voltage waveforms are illustrated by Figure 9. VMOT1 VOLTAGE ON CAP-TI SL01523 Figure 9. Typical Cap-TI and VMOT1 voltage waveforms in normal running mode 1994 May 18 13 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T NOTE: 1. If the chosen value of CAP-TI is too small, then oscillations can occur in certain positions of a blocked rotor. If the chosen value is too large, then it is possible that the motor may run in the reverse direction (synchronously with little torque). The External Damping Components Flyback pulses from the motor windings may cause H F interference and acoustic noise. The flyback pulses can be damped by RC-combinations in parallel with the motor windings. This reduces the HF interference; it also reduces the acoustic noise by several dB, depending on the motor construction. These damping components also have negative effects. They not only dissipate energy from the flyback pulses, but also contribute to the overall energy consumption. Other negative effects are discussed below. One negative effect is the distortion of the motor EMF sensed by the comparators in the TDA5146T. This distortion may influence the correct functioning of the TDA5146T, for example, an (damped) oscillation occurring after the winding has been switched off. This oscillation must be critically (or over critically) damped, so that: R2 C=4 L (L = inductance of one coil, R and C for damping) A second requirement is that the effect of the damping components must be negligible by the time that the zero-crossing of the EMF is expected. This is because the remainder of the step (due to RC components) causes shifting of the zero-crossing. For a critically damped combination the voltage can be calculated as a negative exponential with ws t. Example: Commutation frequency = 900 Hz, so t = 1100 ms, the time taken from the end of the diode pulse to the zero-crossing of the EMF will be approximately t = 440 ms. If a damping voltage from 9 V to 3 mV is required, then the reduction is 3000-fold, or e exp-8 = e exp - ws x t. This gives ws = 18180 rad/s. With L = 3 mH, C is found to be 1.01 mF (use 1 mF) and R is found to be 109.1 W (use 100 W). A motor voltage of 7 V (peak-to-peak) at 150 Hz gives 3300 V/s, thus a 3 mV remainder shifts the zero-crossing 1 ms. Eddy currents will also contribute to this phase shift. A shift of 20 ms corresponds with 0.18 degrees (mechanically) for a 1500 rpm motor, or 0.1 mm on a VHS scanner drum. Other Design Aspects There are other design aspects concerning the application of the TDA5146T besides the commutation function. They are: * Generation of the tacho signal FG * Possibilities of motor control * Preposition input * Direction input * Brake input * Reliability FG Signal The FG signal is generated in the TDA5146T by using the zero-crossing of the motor EMF from the three motor windings. Every zero-crossing in a (star connected) motor winding is used to toggle the FG output signal. The FG frequency is therefore half the commutation frequency. All transitions indicate the detection of a zero-crossing (except for PG). The negative-going edges are called FG pulses because they generate an interrupt in a controlling microprocessor. The accuracy of the FG output signal (jitter) is very good. This accuracy depends on the symmetry of the motor's electromagnetic construction, which also effects the satisfactory functioning of the motor itself. Example: A three phase motor with 6 magnetic pole-pairs at 1500 rpm and with a full-wave drive has a commutation frequency of 25 6 6 = 900 Hz, and generates a tacho signal of 450 Hz. DIRECTION Input If the voltage on pin 24 is less than 0.8 V, the motor is running in one direction (depending of the motor connections). If the voltage on pin 24 is higher than 2.0V, the motor is running in the other direction. BRAKE function If the voltage on pin 23 is higher than 2.0V , the motor brakes. In that condition, the 3 outputs MOT1, MOT2, and MOT3 are forced at a low level and the current limitation is done internally by the sink drivers. TEST function It is possible to turn off the three outputs by forcing in pin 16 a current of 600 mA. 1994 May 18 14 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T R = ((VP - 0.4) .10e4) /6 TEST VP SL01524 Figure 10. RESET function If the voltage on pin 8 is higher than 2.0V, the output states are: * MOT 1 - Float * MOT 2 - Low * MOT 3 - High SWITCHING SEQUENCE AFTER A RESET PULSE DIR H H H H H H H L L L L L L L RESET H L L L L L L H L L L L L L MOT1 F F H H F L L H H F L L F H MOT2 L L L F H H F L L L F H H F MOT3 H H F L L F H F F H H F L L FUNCTION Reset Normal direction mode sequence Reset Reverse direction mode sequence PRIORITY OF FUNCTION BRAKE L L L L H H H H TEST L L H H L L H H RESET L H L H L H L H FUNCTION Normal Reset Test Test Brake Brake Brake Brake RELIABILITY It is necessary to protect high current circuits and the output stages are protected in two ways: (+15% ). This means that the current to and from the output stages is limited. * Current limiting of the 'lower' output transistors. The 'upper' output transistors use the same base current as the conducting 'lower' transistor * Thermal protection of the six output transistors is achieved by each transistor having a thermal sensor that is active when the transistor is switched on. The transistors are switched off when the local temperature becomes too high. 1994 May 18 15 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T SOLDERING Plastic mini-packs BY WAVE During placement and before soldering, the component must be fixed with a droplet of adhesive. After cutting the adhesive, the component can be soldered. The adhesive can be applied by screen printing, pin transfer or syringe dispending. Maximum permissible solder temperature is 260 C; and maximum duration of package immersion in solder bath is 10 s, if allowed to cool to less than 150 C within 6 s. Typical dwell time is 4 s at 250 C. A modified wave soldering technique is recommended using two solder waves (dual-wave), in which a turbulent wave with high upward pressure is followed by a smooth laminar wave. Using a mildly activated flux eliminates the need for removal of corrosive residues in most applications. BY SOLDER PASTE REFLOW Reflow soldering requires the solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the substrate by screen printing, stencilling or pressure-syringe dispending before device placement. Several techniques exist for reflowing; for example, thermal conduction by heated belt, infrared and vapor-phase reflow. Dwell times vary between 50 and 300 s according to method. Typical reflow temperatures range from 215 to 250 C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 min at 45 C. REPAIRING SOLDERED JOINTS (BY HAND-HELD SOLDERING IRON OR PULSE-HEATED SOLDER TOOL) Fix the component by first soldering two, diagonally opposite, end pins. Apply the heating tool to the flat part of the pin only. Contact time must be limited to 10 s at up 300 C. When using proper tools, all other pins can be soldered in one operation within 2 to 5 s at between 270 and 320 C. Pulse-heated soldering is not recommended for SO packages. For pulse-heated solder tool (resistance) soldering of VSO packages, solder is applied to the substrate by dipping or by an extra thick tin/lead plating before package placement. Plastic dual in-line packages BY DIP OR WAVE The maximum permissible temperature of the solder is 260 C; this temperature must not be in contact with the joint for more than 5 s. The total contact time of successive solder waves must not exceed 5 s. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified storage maximum. If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. 1994 May 18 16 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T SO28: plastic small outline package; 28 leads; body width 7.5 mm SOT136-1 1994 May 18 17 Philips Semiconductors Product specification Brushless DC motor drive circuit TDA5146T Data sheet status Data sheet status [1] Objective specification Preliminary specification Product specification Product status [2] Development Qualification Definitions This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. This data sheet contains data from the product specification. Philips Semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Changes will be communicated according to the Customer Product/Process Change Notification (CPCN) procedure SNW-SQ-650A. Production [1] Please consult the most recently issued data sheet before initiating or completing a design. [2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com. Definitions Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Disclaimers Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Contact information For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825 (c) Koninklijke Philips Electronics N.V. 1994 All rights reserved. Printed in U.S.A. Date of release: 05-94 For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com. Document order number: 9397 750 08834 Philips Semiconductors 1994 May 18 18 |
Price & Availability of TDA5146T
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |