M56733AFP 3-Phase Brushless Motor Driver REJ03F0081-0100Z Rev.1.0 Sep.22.2003 Description The M56733AFP is a semiconductor integrated circuit designed as a single-chip controller for FDD spindle motors. It incorporates a power amplifier, Hall amplifier, FG amplifier, oscillator, and speed discriminator, along with various protective circuits. Control of switching between three speeds by the single MOD pin gives this IC the edge for use in compact systems. Features • • • • • Digital servo provides high precision, good stability, and freedom from the need for adjustment. A single pin controls switching between three speed. ••• MOD Two enable signals. ••• EN, EN IO (peak) = 1.0 A Low-capacitance damping capacitor Applications • FDD spindle motors (5 inches) Recommended Operating Conditions • • • • Power-supply voltage: 10.8 (min.) to 13.2 (max.), 12.0 (typ.) Oscillation frequency: 492 kHz Maximum output current: 800 mA FG amplifier input signal level: 5 mVp-p or more Rev.1.00, Sep.22.2003, page 1 of 6 M56733AFP Block Diagram U V W FLT ERROUT ERRIN(–) DSCOUT 36 35 34 17 20 19 18 RF 31 VREF – 7 to ERR + – + 12 GND OVSD CTL DISCRIMINATOR VREF 25 to 30 LOGIC VCC 1 + – 33 32 HU+ HU– + – 24 23 HV+ HV– TSD + – 22 21 HW+ HW– 1/N OSC EN CONTROL FG 2 6 13 Hall Bias EN EN – + 3 4 FG– FG+ Pin Configuration VCC 1 36 U HB 2 35 V FGIN– 3 34 W FGIN+ 4 33 HU+ FGMoni 5 32 HU– EN 6 31 RF 7 30 9 GND 10 11 M56733AFP 8 28 27 GND 26 12 25 13 24 HV+ OSCIN 14 23 HV– OSCOUT 15 22 HW+ MOD 16 21 HW– FLT 17 20 ERROUT DSCOUT 18 19 ERRIN– EN 36P2R-D Rev.1.00, Sep.22.2003, page 2 of 6 29 5 FG (Monitor) 14 15 OSCIN OSCOUT 16 MOD M56733AFP Absolute Maximum Ratings (Ta = 25°C) Symbol Parameter Test conditions VCC IO VHD Power-supply voltage Output current Hall amplifier differential input voltages VIN Voltage applied to pins fIN Pt Kθ Tj Topr Tstg Clock frequency Allowable dissipation Thermal derating range Junction temperature Ambient operating temperature Storage temperature Between pins 21 and 22, 23 and 24, and 32 and 3 Ratings Unit 15 1.0 5 V A V 0 to Vcc V 1000 4.5 27.8 150 –20 to 75 –40 to 125 kHz A °C/W °C °C °C 6, 13, 21 to 24, 32, 33 (pin numbers) Infinite heat sink Infinite heat sink Characteristic curves Thermal derating curve Allowable power dissipation Pdp (W) 5.0 4.5 Given an infinite heat sink 4.0 Not given an infinite heat sink 3.0 2.0 1.0 0 0 25 50 75 100 125 Ambient temperature Ta (°C) Rev.1.00, Sep.22.2003, page 3 of 6 150 M56733AFP Electrical Characteristics (unless otherwise noted, Ta = 25°C, VCC = 5.0 V,) Symbol Parameter Test conditions Limits Min Typ Max ICCH Circuit Current 9 18 28 mA ICCL Circuit Current When the circuit is switched on. Excludes the injector current. When only the minimal circuit is switched on. — — 300 µA IINHA VN Current input to the Hall amplifier Voltage when the output is at the mid-phase point — 5.1 0.4 6.3 4.0 7.1 µA V ∆VN Difference of voltage when the output is at the mid-phase point — — 0.2 V Vsat Saturation output voltage Io = 0.7 A, sum of upper and lower transistors — 2.8 3.2 V VTH Control-input reference voltage FLT-pin voltage for which motor rotates 1.05 1.20 1.35 V GV Voltage gain between control input and output Source side Sink side Source and sink sides ∆GV Difference of voltage-gain between phases 16.65 20.82 26.00 — 18.05 23.80 28.00 — 25.10 26.81 30.00 2 dB dB dB dB Vref Error amplifier reference voltage Intermediate level of discriminator output is measured 2.0 2.2 2.4 V IIN•E VO•E Error amplifier input current Error amplifier output level VCL Current-limiting reference voltage –0.2 2.2 0.6 0.36 –0.02 2.5 0.8 0.40 3.1 1.05 0.44 µA V V V VIN Function- input threshold voltage IIN Current input to the function-input pins Vinj VoDSC Injector pin voltage Discriminator output level ∆T Discriminator count error 2.5 — 500 –150 0.6 4.1 0.5 –6 — — 700 –100 0.9 4.8 0.8 1 — 0.1 1000 –70 1.5 5.3 1.2 6 V V V V V V V µA fosc IinjMAX IinjMIN VOLFG Oscillation frequency Injector max. operating current Injector min. operating current FG amplifier output low level (monitor) fosc = 492 kHz fosc = 492 kHz fosc = 492 kHz IL = 200 µA –0.2 25 — — — — — 0.1 0.2 — 4 0.2 % mA mA V I1FG FG amplifier output pin leakage current (monitor) When 12 V is applied — — 1.0 µA IINMOD Current input to the MOD pin When 12 V is applied When 0 V is applied 435 –75 565 –98 800 –140 µA µA Rev.1.00, Sep.22.2003, page 4 of 6 High Low The RF pin voltage when voltage on the FLT pin falls below 1.5 V. No load. High Pins 6 and 13 Low VIN = 12 V, pin 6 VIN 0 V, pin 13 High Low +: Deceleration side -: Acceleration side fosc = 492 kHz Unit M56733AFP Application Example R7 R5 U *R 8 *C 11 *R 9 *C 12 V R3 W R4 C10 *R 10 *C 13 R6 36 35 34 33 32 31 C9 30 29 28 27 26 25 24 23 22 21 20 19 12 13 14 15 16 17 18 M56733AFP 2 1 3 4 5 6 7 8 9 10 11 R2 R1 + C3 X1 C8 C6 C1 + FG C2 C5 VCC C7 C4 FG EN Moni EN MOD (Individual values) C1=33 F C2=0.47 F C3=10 F C4=0.01 F R1=5.1k R2=510 C5=165pF R3=47k C6=56pF R4=180k C7=165pF R5=1.2k C8=1 F R6=0.5 C9=0.01 F R7=1.2k C10=0.1 F R8=4.7 C11=0.1 F R9=4.7 C12=0.1 F R10=4.7 C13=0.1 F X1=492kHz (Oscillator) 4. Enable function Notes: 1. Values for elements marked * (asterisk) must be selected to prevent oscillation. 2. R1 is used to boost the injection current. Select a suitable value. 3. Select an element of suitable value as required to adjust the gain. EN Lo Hi Lo DISABLE ENABLE Hi DISABLE DISABLE EN 5. Mode function Mode pin Rev.1.00, Sep.22.2003, page 5 of 6 FG synchronization frequency Lo (MOD ≤ 0.8V) fosc/1640Hz M (Open) fosc/820Hz Hi (MOD V 2.6V) fosc/ (4100/3) Hz HE G Z1 e 1 36 z Detail G D y JEDEC Code — MMP b 18 19 Weight(g) 0.53 A Detail F A2 Lead Material Cu Alloy L1 EIAJ Package Code SSOP36-P-450-0.80 E Rev.1.00, Sep.22.2003, page 6 of 6 c A1 F L A A1 A2 b c D E e HE L L1 z Z1 y Symbol e1 b2 e1 I2 b2 Dimension in Millimeters Min Nom Max — — 2.35 0 0.1 0.2 2.05 — — 0.35 0.3 0.45 0.18 0.2 0.25 14.8 15.0 15.2 8.2 8.4 8.6 — 0.8 — 11.63 11.93 12.23 0.3 0.5 0.7 — 1.765 — — — 0.7 — 0.85 — — — 0.15 — 8° 0° — — 0.5 — 11.43 — 1.27 — — Recommended Mount Pad e Plastic 36pin 450mil SSOP I2 36P2R-D M56733AFP Package Dimensions Sales Strategic Planning Div. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Keep safety first in your circuit designs! 1. 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