 |
|
| 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: |
| ZXBM2004 VARIABLE SPEED 2-PHASE BLDC MOTOR CONTROLLER DESCRIPTION The ZXBM2004 is a 2-phase, DC brushless motor pre-driver with PWM variable speed control suitable for fan and blower motors. The controller is intended for applications where the fan or blower speed is controlled by an external PWM signal, thermistor or DC voltage. FEATURES * Compliant with external PWM speed control * Compliant with thermistor control * Minimum speed setting * Low noise * Auto restart * Built in hall amplifier * Speed pulse (FG) and lock rotor (RD) outputs * Up to 18V input voltage (60V with external regulator) * QSOP16 package * Lead free product QSOP16 Associated application notes:AN41 - Thermistor control AN42 - External PWM control AN43 - Interfacing to the motor windings APPLICATIONS * Mainframe and personal computer fans and blowers * Instrumentation fans * Central heating blowers * Automotive climate control ORDERING INFORMATION - QSOP16 DEVICE ZXBM2004Q16TC REEL SIZE 13" (330mm) TAPE WIDTH 12mm QUANTITY PER REEL 2,500 DEVICE MARKING * ZETEX ZXBM 2004 ISSUE 3 - MAY 2005 1 SEMICONDUCTORS ZXBM2004 ABSOLUTE MAXIMUM RATINGS PARAMETER Supply voltage Input current Input voltage Output voltage Power dissipation Operating temp. Storage temp. SYMBOL V CCmax I CCmax V IN max V OUT max P Dmax T OPR T STG LIMITS -0.6 to 20 100 -0.5 to V CC +0.5 -0.5 to V CC +0.5 500 -40 to 110 -55 to 125 UNIT V mA V V mW C C Power Dissipation 1) Maximum allowable Power Dissipation, PD, is shown plotted against Ambient Temperature, TA, in the accompanying Power Derating Curve, indicating the Safe Operating Area for the device. 2) Power consumed by the device, PT, can be calculated from the equation: PT = PQ + PPh where PQ is power dissipated under quiescent current conditions, given by: PQ = VCC x ICC where VCC is the application device Supply Voltage and ICC is the maximum Supply Current given in the Electrical Characteristics and PPh is power generated due to either one of the phase outputs Ph1 or Ph2 being active, given by: PPh = IOL x VOL where IOL is the application Ph1 and Ph2 output currents and VOL is the maximum Low Level Output Voltage for the Ph1 and Ph2 outputs given in the Electrical Characteristics j-a = 112C/W ISSUE 3 - MAY 2005 SEMICONDUCTORS 2 ZXBM2004 ELECTRICAL CHARACTERISTICS (at Tamb = 25C & Vcc = 12V) PARAMETER Supply Voltage Supply Current Hall Amp Input Voltage Hall Amp Common Mode Voltage Hall Amp Input Offset Hall Amp Bias Current PH1, PH2 Output High PH1, PH2 Output Low PH1, PH2 Output Low PH1, PH2 Output Source Current PH1, PH2 Output Sink Current C PWM Charge Current C PWM Discharge Current C PWM High Threshold Voltage C PWM Low Threshold Voltage PWM Frequency ThRef Voltage ThRef Output Current S MIN Input Current SPD Voltage Minimum SPD Voltage Maximum SPD Input Current C LCK Charge Current C LCK Discharge Current C LCK High Threshold Voltage C LCK Low Threshold Voltage Lock condition On:Off ratio FG & RD Low Level Output Current FG & RD Low Level Output Voltage Commutation dead time I OL V OL t CD 7.5 SYMBOL V CC I CC V IN V CM V OFS I BS V OH V OLA V OLB I OH I OL I PWMC I PWMD V THH V THL F PWM V ThReF I OThRef I ISMIN V SPDL V SPDH I ISPD I LCKC I LCKD V THH V THL -2.8 -0.25 1 3 -0.8 -3.8 0.46 3 1 1:12 5 0.5 mA V s I OL = 5mA 0.54 -2 2.88 -4.5 38 3 1 24 2.96 3.10 -1 -0.3 V CC -2.2 40 0.5 7 -400 V CC -1.8 0.4 0.4 0.6 0.6 -80 16 -7.85 65 -710 Vcc-1.5 MIN 4.7 5.5 TYP MAX 18 7.5 UNIT CONDITIONS V mA mV V mV nA V V V mA mA A A V V kHz V mA A V V A A A V V VIN = 2V,SPD=open 100% PWM Drive 0% PWM Drive VIN = 2V C PWM = 0.1nF I OThRef =-100 A I OH =-80mA I OL =16mA 2 I OL =50 A 3 No Load 1 diff p-p Notes: 1. Measured with pins H+, H-, CLCK and CPWM = 0V and all other signal pins open circuit. 2. Measured when opposing Phase Output is Low 3. Measured when opposing Phase Output is High 4. In this datasheet a negative sign for a current indicates current flowing out of the pin whilst no sign indicates current flowing into the pin. ISSUE 3 - MAY 2005 3 SEMICONDUCTORS ZXBM2004 Block diagram Pin assignments H+ HN/C ThRef SPD CPWM SMIN Gnd 1 Vcc V+OP ZXBM2004 QSOP16 Ph1 Ph2 N/C FG RD CLCK ISSUE 3 - MAY 2005 SEMICONDUCTORS 4 ZXBM2004 PIN FUNCTIONAL DESCRIPTION H+ - Hall input H- - Hall input The rotor position is detected by a Hall sensor, with the output applied to the H+ and H- pins. This sensor can be either a 4 pin 'naked' Hall device or of the 3 pin buffered switching type. For a 4 pin device the differential Hall output signal is connected to the H+ and H- pins. For a buffered Hall sensor the Hall device output is attached to the H+ pin, with a pull-up attached if needed, whilst the H- pin has an external potential divider attached to hold the pin at half Vcc. When H+ is high in relation to H-, Ph2 is the active drive. If required this pin can also be used as an enable pin. The application of a voltage >3.0V will force the PWM drive fully off, in effect disabling the drive. SMIN - Sets Minimum Speed A voltage can be set on this pin via a potential divider between the ThRef and Gnd. This voltage is monitored by the SPD pin such that it cannot rise above it. As a higher voltage on the SPD pin represents a lower speed it therefore restricts the lower speed range of the fan. If this feature is not required the pin is left tied to ThRef so no minimum speed will be set. If the fan is being controlled from an external voltage source onto the SPD pin then either this feature should not be used or if it is required then a >1k resistor should be placed in series with the SPD pin. ThRef - Network Reference This is a reference voltage of nominal 3V. It is designed for the ability to 'source' and therefore it will not 'sink' any current from a higher voltage. The current drawn from the pin by the minimum speed potential divider to pin SMIN and any voltage setting network should not exceed 1mA in total at maximum temperature. CPWM - Sets PWM Frequency This pin has an external capacitor attached to set the PWM frequency for the Phase drive outputs. A capacitor value of 0.1nF will provide a PWM frequency of typically 24kHz. The CPWM timing period (TPWM) is determined by the following equation: SPD - Speed Control Input The voltage applied to the SPD pin provides control over the Fan Motor speed by varying the Pulse Width Modulated (PWM) drive ratio at the Ph1Lo and Ph2Lo outputs. The control signal takes the form of a voltage input of range 3V to 1V, representing 0% to 100% drive respectively. If variable speed control is not required this pin can be left with an external potential divider to set a fixed speed or tied to ground to provide full speed i.e. 100% PWM drive. TPWM = (V THH - V THL ) x C (V THH - V THL ) x C + I PWMC I PWMD C = CPWM +15, in pF VTHH and VTHL are the CPWM pin threshold voltages IPWMC and IPWMD are the charge and discharge currents in A. TPWM is in ms Where: ISSUE 3 - MAY 2005 5 SEMICONDUCTORS ZXBM2004 As these threshold voltages are nominally set to VTHH = 3V and VTHL = 1V the equations can be simplified as follows: FG - Frequency Generator (speed) output This is the Frequency Generator output and is a buffered signal from the Hall sensor. This is an open collector drive giving an active pull down with the high level being provided by an external pull up resistor. TPWM = 2C 2C + I PWMC I PWMD CLCK - Locked rotor timing capacitor Should the fan stop rotating for any reason, i.e. an obstruction in the fan blade or a seized bearing, then the device will enter a Rotor Locked condition. In this condition after a predetermined time (TLOCK) the RD pin will go high and the Phase outputs will be disabled. After a further delay (TOFF) the controller will re-enable the Phase drive for a defined period (TON) in an attempt to re-start the fan. This cycle of (TOFF) and (TON) will be repeated indefinitely or until the fan re-starts. Ph1Lo & Ph2Lo - Driver This pair of outputs drive the external devices. These outputs provide both the commutation and PWM waveforms. The outputs are of the Darlington emitter follower type with an active pull-down to help faster switch off when using bipolar devices. When in the high state the outputs will provide up to 80mA of drive into the base or gates of external transistors as shown in the Typical Application circuit following. When in the low state the active Phase drive is capable of sinking up to 16mA when driving low to aid turn off times during PWM operation. When the Phase is inactive the output is held low by an internal pull-down resistor. GND - Ground This is the device supply ground return pin and will generally be the most negative supply pin to the fan. RD - Locked Rotor error output This pin is the Locked Rotor output as referred to in the CLCK timing section above. It is high when the rotor is stopped and low when it is running. This is an open collector drive giving an active pull down with the high level being provided by an external pull up resistor. V+OP - Phase Outputs Supply Voltage This pin is the supply to the Phase outputs and will be connected differently dependant upon external transistor type. For bipolar devices this pin will be connected by a resistor to the VCC pin. The resistor is used to control the current into the transistor base so its value is chosen accordingly. For MOSFET devices the pin will connect directly to the VCC pin. ISSUE 3 - MAY 2005 SEMICONDUCTORS 6 ZXBM2004 VCC - Applied Voltage This is the device internal circuitry supply voltage. For 5V to 12V fans this can be supplied directly from the Fan Motor supply. For fans likely to run in excess of the 18V maximum rating for the device this will be supplied from an external regulator such as a Zener diode. RD Timing Waveform: Hall VTHH CLCK VTHL TLock TOff TOn RD FG Applications Information The ZXBM2004 is primarily controlled by a voltage on the SPD pin. A voltage of 1V represents a 100% PWM at the Phase Outputs and in turn represents full speed. 3V on the SPD pin conversely represents 0% PWM. The motor can therefore be controlled simply by applying a control voltage onto the SPD pin with the minimal use of external components. This voltage control method easily lends itself to control by other signal types. For example if a thermistor is applied to the SPD pin a varying voltage can be generated at the SPD pin as the resistance of the thermistor varies with temperature. A common form of control of fans is by a PWM signal derived from a central processor or controller. This signal can be converted into a voltage and that voltage adjusted as neccesary to compensate for motor none linearity, inclusion of the Minimum speed feature etc. Full applications details and further examples of how to control the ZXBM2004 are available in the Applications Notes AN41, AN42 and AN43. ISSUE 3 - MAY 2005 7 SEMICONDUCTORS ZXBM2004 Figure 1: 12V Typical circuit for thermistor controlled speed Figure 2: Typical circuit for external PWM controlled speed (single MOSFET) ISSUE 3 - MAY 2005 SEMICONDUCTORS 8 ZXBM2004 Figure 3: Typical circuit for 48V input and external PWM control Figure 4: Typical circuit for constant speed operation ISSUE 3 - MAY 2005 9 SEMICONDUCTORS ZXBM2004 Drive transisitors Zetex offers a range of devices that are ideally suited to interface between the ZXBM2004 controller and the motor. The following tables show a selection of products. If your needs are not covered by this selection then please refer to the the more comprehensive listings that can be found on the Zetex website: www.zetex.com MOSFETs Part Number ZXMN10A09K ZXMN10A11G ZXMN10A08DN8 ZXMN10A07Z ZXMN6A09K ZXMN6A25DN8 ZXMN6A11Z ZXMN6A07Z Polarity N N 2xN N N 2xN N N BV DSS V 100 100 100 100 60 60 60 60 ID A 7.7 2.4 2.1 1.4 11.2 4.7 3.2 2.2 0.085 0.35 0.25 0.7 0.045 0.055 0.14 0.3 DPAK SOT223 SO8 SOT89 DPAK SO8 SOT89 SOT89 R DS(on) @ V GS = 10 Package Bipolar Transistors Part Number Polarity V CEO V FZT855 FMMT624 ZX5T853G FCX493 FCX1053A ZX5T851G FCX493A FCX619 FMMT619 NPN NPN NPN NPN NPN NPN NPN NPN NPN 150 125 100 100 75 60 60 50 50 IC A 4 1 6 1 3 6 1 3 2 V CE(sat) @ I C /I B mV @ A/mA 65 @ 0.5/50 150 @ 0.5/50 125 @ 2/100 300 @ 0.5/50 200 @ 1/10 135 @ 2/50 500 @ 1/50 260 @ 2/50 220 @ 2/50 Package SOT223 SOT23 SOT223 SOT89 SOT89 SOT223 SOT89 SOT89 SOT23 ISSUE 3 - MAY 2005 SEMICONDUCTORS 10 ZXBM2004 Notes: ISSUE 3 - MAY 2005 11 SEMICONDUCTORS ZXBM2004 PACKAGE OUTLINE QSOP16 PACKAGE DIMENSIONS Dim Min. A A1 A2 D ZD E E1 L e b c h 0.053 0.004 0.049 0.189 0.009 Ref 0.228 0.150 0.016 0.008 0.007 0 0.010 0.244 0.157 0.050 0.012 0.010 8 0.020 Inches Max. 0.069 0.010 0.059 0.197 Millimeters Min. 1.35 0.10 1.25 4.80 5.79 3.81 0.41 0.20 0.18 0 0.25 Max. 1.75 0.25 1.50 5.00 6.20 3.99 1.27 0.30 0.25 8 0.50 0.23 BSC 0.025 BSC 0.64 BSC Note: Dimensions in inches are control dimensions, dimensions in millimeters are approximate. (c) Zetex Semiconductors plc 2005 Europe Zetex GmbH Streitfeldstrae 19 D-81673 Munchen Germany Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 europe.sales@zetex.com Americas Zetex Inc 700 Veterans Memorial Hwy Hauppauge, NY 11788 USA Telephone: (1) 631 360 2222 Fax: (1) 631 360 8222 usa.sales@zetex.com Asia Pacific Zetex (Asia) Ltd 3701-04 Metroplaza Tower 1 Hing Fong Road, Kwai Fong Hong Kong Telephone: (852) 26100 611 Fax: (852) 24250 494 asia.sales@zetex.com Corporate Headquaters Zetex Semiconductors plc Zetex Technology Park, Chadderton, Oldham, OL9 9LL United Kingdom Telephone (44) 161 622 4444 Fax: (44) 161 622 4446 hq@zetex.com These offices are supported by agents and distributors in major countries world-wide. This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service. For the latest product information, log on to www.zetex.com ISSUE 3 - MAY 2005 SEMICONDUCTORS 12 |
Price & Availability of ZXBM2004
 |
|
|
|
|
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] |