LB11920_08

Ordering number : EN7229B Monolithic Digital IC LB11920 Overview For OA Products Three-Phase Brushless Motor Driver The LB11920 is a direct PWM drive motor driver IC for 3-phase power brushless motors. The PWM duty can be controlled by IC inputs, and it can be used over the wide supply voltage range of 9.5 to 30V. Features • Three-phase bipolar drive (35V, 3.5V) • Direct PWM drive • Built-in high and low side kickback absorbing diodes • Braking function (short-circuit braking) • Built-in forward/reverse direction switching circuit • Full complement of built-in protection circuits, including current limiter, low-voltage protection, motor lock (physical constraint) protection, and thermal protection circuits • The PWM duty can be controlled by IC inputs Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Supply voltage 1 Supply voltage 2 Output voltage Output current Allowable power dissipation Symbol VM max VCC max VOUT max IO max Pd max1 Pd max2 Operating temperature Storage temperature Topr Tstg OUT1 to OUT3 T ≤ 500ms Independent IC With an infinitely large heat sink. Conditions Ratings 35 7 35 3.5 3 20 -20 to +80 -55 to +150 Unit V V V A W W °C °C Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer' s products or equipment. 82008 MS PC/O3003SI (OT) No.7229-1/10 LB11920 Allowable Operating Conditions at Ta = 25°C Parameter Supply voltage range 1 Supply voltage range 2 HP pin applied voltage HP pin output current Symbol VM VCC VHP IHP Conditions Ratings 9.5 to 30 4.5 to 5.5 0 to 32 0 to 3 Unit V V V mA Electrical Characteristics at Ta = 25°C, VM = RF = 27V, VCC = 5V Parameter Supply current 1 Supply current 2 Output block Output saturation voltage 1 Output saturation voltage 2 Output saturation voltage 3 Output leakage current Output delay time 1 Output delay time 2 Lower diode forward 1 Lower diode forward 2 Lower diode forward 3 Upper diode forward 1 Upper diode forward 2 Upper diode forward 3 Hall Amplifier Input bias current Common-mode input voltage range 1 Common-mode input voltage range 2 Hall input sensitivity Hysteresis width Input voltage low → high Input voltage high → low PWM oscillator Output H level voltage Output L level voltage External C charge current Oscillator frequency Amplitude CSD circuit Operating voltage External C charge current Operating time HP pin Output low level voltage Output leakage current Thermal shutdown operation Thermal shutdown operating temperature Hysteresis width Current limiter circuit (RF pin) Limiter voltage VRF 0.45 0.5 0.55 V ΔTSD Design target value* (junction temperature) 45 °C TTSD Design target value* (junction temperature) 150 180 °C VOL (HP) Ileak(HP) IHP = 2mA VHP = 30V 0.1 0.4 10 V μA VOH (CSD) ICHG (CSD) T (CSD) VCSD = 0V C = 10μF, Design target value* 3.6 -15 3.9 -11 3.5 4.2 -7 V μA s VOH (PWM) VOL (PWM) ICHG(PWM) f (PWM) V (PWM) VPWM = 2.1V C = 1000pF 2.75 1.0 -60 15.8 1.6 3.0 1.2 -45 20 1.8 3.25 1.3 -30 24.2 2.1 V V μA kHz Vp-p ΔVIN VSLH VSHL IHB VICM1 VICM2 Hall device used For input one-side bias (Hall IC application) at differential input -2 0.5 0 50 20 5 -25 30 15 -15 50 25 -5 -0.1 VCC-2.0 VCC μA V V mVp-p mV mV mV VO sat1 VO sat2 VO sat3 IO leak td1 td2 VD1-1 VD1-2 VD1-3 VD2-1 VD2-2 VD2-3 PWMIN “H” → “L” PWMIN “L” → “H” ID = -1.0A ID = -2.0A ID = -3.0A ID = 1.0A ID = 2.0A ID = 3.0A 1.25 1.8 1.1 1.3 1.5 1.3 2.0 2.7 IO = 1.0A, VO (sink) + VO (source) IO = 2.0A, VO (sink) + VO (source) IO = 3.0A, VO (sink) + VO (source) 1.7 2.0 2.4 2.4 2.9 3.5 100 2.5 3.6 1.5 1.9 2.3 1.7 2.7 3.7 V V V μA μs μs V V V V V V Symbol IVCC-1 IVCC-2 VCC pin VCC pin at stop mode Conditions min Ratings typ 9 2.0 max 13 3.0 mA mA Unit Note : * This parameter is a design target value and is not measured. Continued on next page. No.7229-2/10 LB11920 Continued from preceding page. Parameter Low-voltage protection circuit Operating voltage Release voltage Hysteresis width PWMIN pin Input frequency H level input voltage L level input voltage Input open voltage Hysteresis width H level input current L level input current S/S pin H level input voltage L level input voltage Input open voltage Hysteresis width H level input current L level input current F/R pin H level input voltage L level input voltage Input open voltage Hysteresis width H level input current L level input current BR pin H level input voltage L level input voltage Input open voltage Hysteresis width H level input current L level input current VIH (BR) VIL (BR) VIO (BR) VIS (BR) IIH (BR) IIL(BR) VBR = VCC VBR = 0V 2.0 0 VCC-0.5 0.15 -10 -116 0.25 0 -87 VCC 1.0 VCC 0.35 10 -58 V V V V μA μA VIH (F/R) VIL (F/R) VIO (F/R) VIS (F/R) IIH (F/R) IIL(F/R) VF/R = VCC VF/R = 0V 2.0 0 VCC-0.5 0.15 -10 -116 0.25 0 -87 VCC 1.0 VCC 0.35 10 -58 V V V V μA μA VIH (S/S) VIL (S/S) VIO (S/S) VIS (S/S) IIH (S/S) IIL(S/S) VS/S = VCC VS/S = 0V 2.0 0 VCC-0.5 0.15 -10 -116 0.25 0 -87 VCC 1.0 VCC 0.35 10 -58 V V V V μA μA f (PI) VIH (PI) VIL (PI) VIO (PI) VIS (PI) IIH (PI) IIL (PI) VPWMIN = VCC VPWMIN = 0V 2.0 0 VCC-0.5 0.15 -10 -116 0.25 0 -87 50 VCC 1.0 VCC 0.35 10 -58 kHz V V V V μA μA VSDL VSDH ΔVSD 3.6 4.1 0.35 3.8 4.3 0.5 4.0 4.5 0.65 V V V Symbol Conditions min Ratings typ max Unit Package Dimensions unit : mm (typ) 3174C 24 Pd max -- Ta With an infinitely large heat sink 28 15 Allowable power dissipation, Pd max – W 20 12.7 11.2 8.4 R1.7 16 0.4 1 20.0 26.75 14 12 8 4.0 4.0 4 3 Independent IC (1.81) 1.78 0.6 1.0 0 – 20 0 20 40 60 80 100 Ambient temperature, Ta – °C SANYO : DIP28H(500mil) No.7229-3/10 LB11920 Pin Assignment OUT1 28 NC 27 GND2 26 VM 25 RF 24 GND3 23 IN3+ 22 IN321 IN2+ 20 IN219 IN1+ 18 IN117 CSD 16 TOC 15 LB11920 1 OUT2 2 3 4 NC 5 VM 6 RF 7 HP 8 BR 9 PWMIN 10 F/R 11 S/S 12 VCC 13 14 OUT3 GND2 GND1 PWM Top view Truth Table Source Sink 1 2 3 4 5 6 OUT2 → OUT1 OUT3 →OUT1 OUT3 → OUT2 OUT1 → OUT2 OUT1 → OUT3 OUT2 → OUT3 IN1 H H H L L L F/R = “L” IN2 L L H H H L IN3 H L L L H H IN1 L L L H H H F/R = “H” IN2 H H L L L H IN3 L H H H L L S/S pin Input condition H or open L Condition Stop Start PWMIN pin Input condition H or open L Condition Output OFF Output O BR pin Input condition H or open L Condition Brake The PWMIN pin must be held at the low-level voltage when this IC is operated with a voltage applied to the TOC pin. No.7229-4/10 + CSD CSD LVSD CIRCUIT VM CURR LIM Rf 27V Block Diagram 5V VCC + TSD LOGIC HALL LOGIC DRIVER HALL HYS AMP PWM IN F/R BR F/R BR HP IN1 IN2 IN3 GND2 VCC H H H GND1 + GND3 – TOC + RF PWM PWM LB11920 OSC OUT1 RESET OUT2 VREF S/S OUT3 S/S PWMIN No.7229-5/10 LB11920 Pin Functions Pin No. 28 1 2 3, 26 5, 25 6, 24 Pin name OUT1 OUT2 OUT3 GND2 VM RF Output GND pin. Power pin. Output Tr power and output current detector pins, which connect low resistance (Rf) to VM. The output current is limited to the current value set with IOUT = VRF/Rf. Function Motor drive output pin. Equivalent circuit VM 300Ω RF 5 25 6 24 1 2 28 3 26 7 HP Hall element signal three-phase composite output. Withstand voltage 35V max. VCC 7 8 BR Brake input pin. “L” for brake and “H” or open for normal rotation. VCC 50kΩ 3.5kΩ 8 9 PWMIN PWM pulse input pin. L for output drive and H or open for output OFF. VCC 50kΩ 3.5kΩ 9 10 F/R Forward/reverse input pin. VCC 50kΩ 3.5kΩ 10 Continued on next page. No.7229-6/10 LB11920 Continued from preceding page. Pin No. 11 Pin name S/S Function Start/stop control pin. Start with L and stop with H or in the open condition. Equivalent circuit VCC 50kΩ 3.5kΩ 11 12 13 14 VCC GND1 PWM Control circuit power pin. GND pin (control circuit block). Pin to set the PWM oscillation frequency. Connect a capacitor between this pin and GND. VCC 200Ω 15 TOC PWM waveform comparator pin. Normally use with “L” or open. To control the output duty by applying the voltage to this pin without using the PWMIN pin, set the PWMIN pin to “L”. VCC 2kΩ 14 15 16 CSD Pin to set the operation time of motor lock protection circuit. Insertion of a capacitor (about 10μF) between CSD and GND enables setting of the protection operation time of about 3.5sec. VCC 300Ω 50kΩ 500Ω 16 Continued on next page. No.7229-7/10 LB11920 Continued from preceding page. Pin No. 18 17 20 19 22 21 Pin name IN1+ IN1IN2+ IN2IN3+ IN3Function Hall amplifier input. IN+ > IN- is the input high state, and the reverse is the input low state. Connect a capacitor between the IN+ and INinputs if there is noise in the Hall sensor signals. Equivalent circuit VCC 18 20 22 300Ω 300Ω 19 21 23 23 4 27 GND3 NC SUBGND pin to connect to GND1 that is GND of the control circuit. NC pin that can be used for wiring. LB11920 Description 1. Output drive circuit This IC is of a direct PWM drive type that suffers less power loss at the output. On the basis of the signal (“H” level for OFF and “L” level for ON) entered in the PWMIN pin, the lower output Tr performs PWM switching, causing change in the motor drive power. To control by means of the DC voltage, apply the voltage to the TOC pin (in this case, the PWMIN pin should be in the “L” level input condition). The TOC pin voltage is compared with the oscillation voltage of PWM pin, determining the duty. As the TOC pin voltage is lower, the output duty increases. 2. Hall input signal For Hall input, entry of the signal whose amplitude is larger than the hysteresis width (50mV max) is necessary. Considering effects of noise and phase delay, entry of the amplitude of 120mVp-p (at differential input) or more is recommended. When noise causes disturbance in the output waveform (at phase switching) or in the HP output (Hall signal three-phase composite output), insert a capacitor, etc. as near as possible to the pin between inputs to prevent such effects. The Hall input is used as a signal for judgment of the input of the motor lock protection circuit. Though it is designed to ignore noise to a certain extent, due attention should be paid to check for incorrect operation of the protection circuit. Both upper and lower outputs are OFF when all three-phases of Hall input signal are in the common-mode input condition. When the Hall IC output is to be entered, entry of 0 - VCC can be made for another single-side input by fixing either one side (+ or -) of input to the voltage within the common-mode input range with the Hall element used. 3. Current limiting circuit The current limiting circuit performs limiting with the current determined from I = VRF/Rf (VRF = 0.5Vtyp, Rf : current detector resistance) (that is, this circuit limits the peak current). The control operation functions to reduce the on state duty of the output and thus reduce the current. Switching during current limiting is made on the basis of the frequency oscillated with the PWM pin. The PWM frequency is determined from the capacitance C (F) of capacitor connected to the PWM pin. fPWM ≈ 1/ (50000 × C) The PWM frequency of 15k to 25kHz is recommended. As PWM oscillation is used also as a clock signal of the internal logic circuit, its oscillation is necessary even in the application where current limiting is not needed. 4. Power save circuit This IC enters the power save condition to decrease the current dissipation in the stop mode. In this condition, the bias current of most of circuits is cut off. No.7229-8/10 LB11920 5. Forward/backward changeover The motor rotation can be changed over with the F/R pin. Following cautions should be observed when F/R changeover is to be made while the motor is running : • The circuit incorporates a measure against the through current at a time of changeover. However it is necessary to take an appropriate measure to prevent the voltage from exceeding the rated voltage (35V) because of rising of the VM voltage at changeover (instantaneous return of the motor current to the power supply). When this is a problem, increase the capacitance of a capacitor between VM and GND. • When the motor current after changeover is the current limit or more, the lower Tr is turned OFF. But the upper Tr enters the short-brake condition, and the current determined from the motor counter-electromotive voltage and coil resistance flows. It is necessary to prevent this current from exceeding the rated current (3.5A). (F/R changeover at high rotation speed is dangerous.) 6. Brake operation Brake operation is made through setting of the BR pin to the “L” level. This operation consists of a short-brake operation in which all of lower outputs are turned OFF while all of upper outputs are turned ON. While the brake is operating, current limiting and motor lock protection circuits are not operative. Apply brake only when the current during operation does not exceed the rated current (3.5A). The circuit incorporates a measure against the through current at a time of changeover. However it is necessary to take an appropriate measure to prevent the voltage from exceeding the rated voltage (35V) because of rising of the VM voltage at changeover (instantaneous return of the motor current to the power supply). When this is a problem, increase the capacitance of a capacitor between VM and GND. 7. Motor lock protection circuit A motor lock protection circuit is incorporated for protection of IC and motor when the motor is locked. The lower output Tr is turned OFF when the Hall input signal is not switched for a certain period in the motor drive condition. The time is set by means of a capacity of a capacitor connected to the CSD pin. Time setting of about 3.5sec is possible for the capacitance of 10μF. (Variance ±30%) Set time (s) ≈ 0.35 × C (μF) Due care must be taken on any leakage current in the capacitor used because it may adversely affect error of the set time, etc. To cancel the motor lock protection condition, one of following steps must be taken : • Stop mode • Maintaining the output duty 0% condition through input of PWMIN or TOC for more than the period of tPWM × 8. (tPWM : IC internal PWM oscillation period) • Power must be applied again (in the stop condition). Connect the CSD pin to GND when the motor lock protection circuit is not to be used. The motor lock protection active period at restart becomes shorter than the setting when the stop time to cancel motor lock protection is shorter because the charge of capacitor cannot be fully discharged. Therefore, it is necessary to provide a certain allowance to the stop period while referring to the following formula as a guideline. Stop time (ms) ≥ 15 × C (μF) 8. Circuit for low-voltage protection This circuit detects the voltage applied to the VCC pin. When this voltage drops below the operation voltage (see the electric characteristics), the lower side output is turned OFF. To prevent repetition of output ON/OFF near the protection activation voltage, the hysteresis is provided. Accordingly, the output is not recovered unless the voltage rises by about 0.5V above the activation voltage. 9. HP output For the HP output, the composite signal of three phases of Hall element signal is output. This is an open collector output. This can be used for the motor rotation detection signal, etc. No.7229-9/10 LB11920 10. Power supply stabilization This IC has a large output current, which causes deviation of the power line readily. To ensure stability, it is necessary to insert a capacitor with sufficient capacitance between the VM pin and GND. To eliminate the high-frequency noise due to switching, insert a ceramic capacitor of about 0.1μF as near as possible to the pin between VM (pin 5) and GND 2 (pin 3). When inserting diode in the power line to prevent breakdown due to reverse connection of power supply, select the sufficiently large capacitance because the power line tends to develop deviation readily. The VCC voltage that is a control power supply must also be fully stabilized by means of a capacitor when such voltage tends to fluctuate because of routing. 11. Routing of a printed circuit board Two pins are provided for each of VM, RF, and GND2 pins where large current flows. On the printed circuit board, both of these pins should be connected and used. If the use of only one pin is possible in certain cases, use pins 3, 5, and 6. GND3 that is a sub-GND (internal separation layer) should be connected with control GND or GND1 with the shortest possible wiring. SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor Co.,Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor Co.,Ltd. product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of August, 2008. Specifications and information herein are subject to change without notice. PS No.7229-10/10