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www.fairchildsemi.com KA2822D 3-Phase BLDC Motor Driver Features * 3-phase, full-wave, linear BLDC motor driver with 2 hall sensors * Built-in soft switching drive circuit * 300 or 360 RPM speed control * Snubberless * Built-in chip enable function * Built-in digital speed control circuit * Built-in current limit circuit * Index sensorless * Built-in TSD (Thermal shutdown) * Low saturation voltage * Digital input: TTL, 5V CMOS compatible * Built-in current-mode control circuit (IPEAK: 1A) Description The KA2822D is a monolithic integrated circuit, and suitable for the three-phase spindle motor driver of FDD system. 28-SSOPH-375 Typical Application * 3.5-inch floppy disk drive (FDD) spildle motor * Other 3-phase BLDC motor Ordering Information Device KA2822D KA2822BD Package 28-SSOPH-375 28-SSOPH-375 Operating Temp. 0 ~ 75C 0 ~ 75C 0 ~ 75C 0 ~ 75C KA2822DTF 28-SSOPH-375 KA2822BDTF 28-SSOPH-375 Rev. 1.0.1 May. 2000. (c)2000 Fairchild Semiconductor International 1 KA2822D Pin Assignments FG INPUT(-) AGC INDEX PULSE WIDTH VOLTAGE REG INDEX BURST INDEX OUTPUT CE 1 2 3 4 5 6 7 28 27 26 25 24 23 22 FG INPUT(+) HALL BIAS CURRENT DETECTION1 V INPUT(-) V INPUT(+) U PHASE OUTPUT V PHASE OUTPUT FIN KA2822D FIN SIGNAL GROUND FG ZERO CROSS FG OUTPUT RPM SELECT CHARGE PUMP OUTPUT OSC INPUT NC 8 9 10 11 12 13 14 21 20 19 18 17 16 15 W PHASE OUTPUT NC U INPUT(+) U INPUT(-) CURRENT DETECTION2 VCC PHASE COMPENSATION 2 KA2822D Pin Definitions Pin Number 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 FIN Pin Name FG_INPUT AGC INDEX PULSE WIDTH VOLTAGE REGULATOR INDEX BURST INDEX OUTPUT CE SIGNAL GROUND FG ZERO CROSS FG OUTPUT RPM SELECT CHARGE PUMP OUTPUT OSC INPUT NC PHASE COMPENSATION VCC CURRENT DETECTION2 U INPUT (-) U INPUT (+) NC W PHASE OUTPUT V PHASE OUTPUT U PHASE OUTPUT U INPUT (+) V INPUT (-) CURRENT DETECTION1 HALL BIAS FG INPUT (+) POWER GROUND I/O I I O O O O I O O I O I I I I I O O O I I I I I Pin Function Description Negative input pin FG signal amp. Automatic gain control input pin Index pulse width detection (1.1V) pin Voltage (2.2V) generator output pin Index pulse width detection (1.4V) pin Index pulse output pin Chip enable (Active low) Signal ground FG signal zero cross detection pin FG signal output pin RPM selection pin (L: 300, H: 360rpm) Charge pump output pin 1MHz oscillation input pin No connection Phase compensation cap. connection pin 5V power supply pin Over current detection pin Negative input pin of U phase amp Positive input pin of U phase amp No connection W phase output pin V phase output pin U phase output pin Positive input pin of V phase amp Negative input pin of V phase amp Over current detection pin Hall sensor bias input pin Positive input pin of FG signal amp Power ground 3 KA2822D Internal Block Diagram CURRENT CURRENT DETECTION2 DETECTION1 17 26 VCC 16 U INPUT (+) 19 U INPUT(-) 18 V INPUT (+) 24 V INPUT(-) 25 + U_AMP - + V_AMP - U_OUT 23 U PHASE OUTPUT Output Control V_OUT 22 U PHASE OUTPUT AGC 2 AGC W_OUT 21 W PHASE OUTPUT HALL BIAS 27 Start-up Hall Zero-cross TSD CE 7 CE CON_AMP 1.3V - + 0.24V 15 FG Zero-cross - 0.69V BUF_AMP + PHASE COMPENSATION FG INPUT(+) 28 FG INPUT(-) 1 FG_AMP + - FG OUTPUT 10 FG ZERO CROSS 9 Timing Detectpr Burst_time Circuit Pulse_width Adjustment 6 INDEX OUTPUT INDEX PULSE WIDTH CHARGE PUMP OUTPUT VOLTAGE REG. INDEX BURST 4 2.2V 5 OSC Rpm_select 11_divider Speed Control Charge Pump 3 12 OSC INPUT 13 14 NC 11 RPM SELECT 8 SIGNAL GROUND FIN 20 NC 4 KA2822D Equivalent Circuits U_amp, V_ amp input U, V, W drive output and current detection 1, 2 vcc (17Pin, 26Pin) vcc vcc 5k 2.5k 2.5k (18Pin, 24Pin) 40k U (23Pin) V (22Pin) VCC (16Pin) (19Pin, 25Pin) W (21Pin) 40k 40k FG input and FG output OSC input vcc vcc 0.5k 0.5k (28Pin) 0.1k 1k 50pF 5k vcc vcc vcc (13Pin) vcc 25k vcc (10Pin) CE input Hall bias input and voltage regulator output vcc vcc vcc CE 3k vcc 2.9V vcc (27Pin) vcc (4Pin) 2.2V 5 KA2822D Equivalent Circuits (Continued) Index pulse width detection output Phase compensation and current detection 1, 2 vcc vcc (15Pin) (3Pin) 2k vcc vcc vcc vcc vcc vcc (17Pin, 26Pin) 2k RPM select input AGC input vcc vcc vcc vcc AGC (2Pin) 6k (11Pin) vcc To U amp, V amp (Current control) Index output Index burst output vcc vcc (6Pin) vcc vcc 2k 1.4V (5Pin) 6 KA2822D Equivalent Circuits (Continued) FG zero cross output vcc vcc vcc (9Pin) Charge pump output vcc vcc vcc to IIL Circuit (12Pin) vcc Charge pump Buffer amp 7 KA2822D Absolute Maximum Rating (Ta=25C) Parameter Maximum power supply voltage Maximum input voltage Maximum output current Normal output current Power dissipation Operating temperature Junction temperture Storage temperature Symbol VCCMAX VINMAX IOMAX IO PD TA TJ TSTG Value 7.0 0 ~ VCC 1 0.7 1.5 0 ~ 75 150 -55 ~ +125 Unit V V A A W C C C Power Dissipation Curve 2.0 1.5 Power Dissipation : PD[W] 1.0 0.5 0 0 25 50 75 100 125 150 175 Ambient temperature, Ta [C] Power dissipation decreases in the rate of 13.5mV / C when mounted on 50mm x 50mm x 1mm PCB (Phenolic resin material) and used above Ta=25C. Recommended Operating Conditions (Ta=25C) Parameter Supply voltage Supply voltage in logic part Ambient operating temperature range Symbol VCC1, VCC2 VCC3 Ta Min. 10.8 4.5 0 Typ. 12.0 5.0 Max 13.2 5.5 +70 Unit V V C Temperature Characteristic Parameter Thermal shutdown temperature NOTE: Reference value note Symbol TSD Min. 125 Typ. 150 Max - Unit C 8 KA2822D Electrical Characteristics (Ta=25C, VCC=5V) Parameter SUPPLY CURRENT Supply current 1 Supply current 2 CHIP ENABLE Input current Input low voltage Input high voltage RPM SELECT Input current Input low voltage Input high voltage HALL AMP Input resistance note Common mode input voltage range Differential input voltage range START-UP Hall bias voltage 1 Hall bias voltage 2 Reference voltage Bias off current OUTPUT AMP Leakage current Saturation voltage 1 Saturation voltage 2 BUFFER & CONTROL AMP Voltage gain 1 note Reference voltage 1 note note note Symbol ICCO ICC ICE ICE1 ICEH1 IRPM VRPM1 VRPMH RIN VCOM VDIF VHB1 VHB2 Vref IHOFF ICER Vsat1 Vsat2 GCT1 Vref1 Vref2 Conditions VCC=6.5V CE=H, RPM=L VCC=6.5V, CE=L CE=0~5V CE=0~5V IH=4mA, CE=L IH=10mA, CE=L IO=1mA, CE=L VH=7V, CE=H IO=0.35A IO=0.7A Current limiter voltage Control begin voltage Min. 3.5 3.5 1 2.0 100 2.3 2.7 1.7 - Typ. 1.0 15 5 5 10 2.5 2.9 2.2 5 0.5 1.0 1.3 -11 0.69 Max. 2.0 23 10 1.0 10 1.0 VCC 420 2.7 3.1 2.7 10 1 1.2 1.8 - Units mA mA A V V A V V k V mVPP V V V A mA V V dB V V 0.205 0.208 0.210 Reference voltage 2 note Notes: Reference value 9 KA2822D Electrical Characteristics (Continued) (Ta=25C, VCC=5V) Parameter CHARGE PUMP Charge current Discharge current Current ratio note Off current Clamp voltage FG AMP Output DC voltage note Voltage gain 2 Input voltage range note Noise margin 1 Noise margin 2 note note note Symbol ICP- ICP+ IR IOFF VCLP VFG GFG VIN ND NC N1 N2 FD IBI VTH1 VTH2 ICT2 VTH3 IOH VO1 Conditions RPM=L RPM=L ICP+ / ICP- VCP=0.63V Differential noise Common mode noise RPM=L RPM=H RPM=L RPM=H IO=1mA Min. -15 15 0.9 1.0 24 2.0 1.2 1.05 -19 0.9 - Typ. -20 20 1.0 1.3 1.3 34 1666.5 1388.5 1.0 1 1.45 1.3 -25 1.1 1 0.2 Max. -25 25 1.1 50 1.5 1.6 44 20 0.5 0.5 1.1 2 1.7 1.55 -36 1.3 2 0.4 Units A A nA V V dB mVP-P mVP-P VP-P MHz A V V A V A V SPEED CONTROL Count range 1note Count range 2 note Operating freq. BURST ADJUSTMENT Input current Threshold voltage 1 Threshold voltage 2 PULSE WIDTH ADJUSMENT Ct2 charge current Threshold voltage 3 INDEX OUTPUT Output leakage current note Output low voltage Notes: Reference value 10 KA2822D Application Information 1. CHIP ENABLE This function turns on or off all blocks by low or high signal. 2. U, V AND W PHASE OUTPUT AMP These ampilifiers drives three output phases - U, V, and W which have 120(degree) phase differences with each other. The three phase waveforms are made with the two hall sensor signals by synthesizing the third phase signal. 3. SPEED CONTROL PART This function compares the real motor rotation frequency with the 300 or 360Hz pulse divided from 1MHz clock pulse for removing speed error when motor is on and speed error is detected by PLL. The speed error sent to charge pump part which repeats charge and discharge controls the output current of the output amp to keep a stable rotation. 11 KA2822D Typical Performance Characteristics ICC 15.0 [mA] 1.5 /div. 0 0 0.8/div. 8.0[V] VCC 1. VCC vs. ICC Vref 3.0 [V] Index pulse width 8.0 [ms] 0.3 /div. 1.0 /div. 0 0.8/div. 8.0[V] 0 4.2 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0[V] VCC VCC vs. Vref (Pin4) VCC VCC vs. Index pulse width 12 KA2822D Typical Application Circuits +5V 220nF 1 SW1 DISK_IN W_P CURRENT DETECTION2 CURRENT DETECTION1 1 H_D SW2 100 100nF VCC HU LED U INPUT(+) U INPUT(-) U PHASE OUTPUT 23 V PHASE OUTPUT 22 21 15 1.8M U V 19 18 16 17 26 U INPUT(+) HV U INPUT(-) 24 25 W PHASE OUTPUT W PHASE COMPENSATION +5V HALL BIAS 27 AGC 2 CE CE FG_INPUT(+) 47nF 47nF FG_INPUT(-) FG ZERO CROSS 9 7 28 1 10k KA2822D 6 3 12 INDEX OUTPUT OSC INPUT 100nF CHARGE PUMP OUTPUT 10nF 56k VR 4 VOLTAGE REGULATOR INDEX BURST 47nF 5 13 11 SIGNAL GROUND OSC INPUT RPM SELECT 8 100nF 330k 47k 1MHz RPM_SEL INDEX 13 28-SSOPH-375 MIN 0.05 0.002 2.20 0.20 0.087 0.008 #28 1.20 ) 0.047 18.80 MAX 0.740 18.40 0.20 0.724 0.008 #14 #15 10.00 0.30 0.394 0.012 2.50 MAX 0.098 MAX0.10 MAX0.004 7.50 0.20 0.295 0.008 0.80 0.20 0.031 0.008 #1 0~ 9.53 0.375 8 0.80 0.031 0.40 0.10 0.016 0.004 ( +0.10 0.25 -0.05 +0.004 0.010 -0.002 TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACExTM BottomlessTM CoolFETTM CROSSVOLTTM DOMETM E2CMOSTM EnSignaTM FACTTM FACT Quiet SeriesTM FAST(R) DISCLAIMER FASTrTM GlobalOptoisolatorTM GTOTM HiSeCTM ISOPLANARTM MICROWIRETM OPTOLOGICTM OPTOPLANARTM POPTM PowerTrench(R) QFETTM QSTM QT OptoelectronicsTM Quiet SeriesTM SuperSOTTM-3 SuperSOTTM-6 SuperSOTTM-8 SyncFETTM TinyLogicTM UHCTM VCXTM FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life support device or system whose failure to perform can systems which, (a) are intended for surgical implant into be reasonably expected to cause the failure of the life the body, or (b) support or sustain life, or (c) whose support device or system, or to affect its safety or failure to perform when properly used in accordance with instructions for use provided in the labeling, can be effectiveness. reasonably expected to result in significant injury to the user. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. Preliminary First Production No Identification Needed Full Production Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only. Rev. F1 |
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