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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
36
V
35
W
34
FLT
17
ERROUT
20
ERRIN(-)
19
DSCOUT
18 7 to 12
RF 31 VREF ERR + - OVSD VREF DISCRIMINATOR
- CTL
+
GND
25 to 30
VCC 1
LOGIC
TSD
1/N
16 MOD
+
-
+
-
+
-
EN CONTROL
OSC FG - +
33
32
24
23
22
21
2
6
13
3
4
5
14
15
HU+ HU-
HV+ HV-
HW+ HW-
Hall Bias
EN
EN
FG- FG+
FG (Monitor)
OSCIN OSCOUT
Pin Configuration
VCC 1 HB 2 FGIN- 3 FGIN+ 4 FGMoni 5 EN 6
7 36 35 34 33 32 31 30
U V W HU+ HU- RF
M56733AFP
8 9
29 28 27 26 25 24 23 22 21 20 19
GND
10 11 12
GND
EN
13
HV+ HV- HW+ HW- ERROUT ERRIN-
OSCIN 14 OSCOUT 15 MOD 16 FLT 17 DSCOUT 18
36P2R-D
Rev.1.00, Sep.22.2003, page 2 of 6
M56733AFP
Absolute Maximum Ratings
(Ta = 25C) Symbol VCC IO VHD VIN fIN Pt K Tj Topr Tstg Parameter Power-supply voltage Output current Hall amplifier differential input voltages Voltage applied to pins Clock frequency Allowable dissipation Thermal derating range Junction temperature Ambient operating temperature Storage temperature Test conditions Ratings 15 1.0 5 0 to Vcc 1000 4.5 27.8 150 -20 to 75 -40 to 125 Unit V A V V kHz A C/W C C C
Between pins 21 and 22, 23 and 24, and 32 and 3 6, 13, 21 to 24, 32, 33 (pin numbers) Infinite heat sink Infinite heat sink
Characteristic curves
Thermal derating curve 5.0
Allowable power dissipation Pdp (W)
4.5 4.0
Given an infinite heat sink Not given an infinite heat sink
3.0
2.0
1.0
0
0
25
50
75
100
125
150
Ambient temperature Ta (C)
Rev.1.00, Sep.22.2003, page 3 of 6
M56733AFP
Electrical Characteristics
(unless otherwise noted, Ta = 25C, VCC = 5.0 V,)
Symbol ICCH ICCL IINHA VN VN Vsat VTH GV Parameter Circuit Current Circuit Current Current input to the Hall amplifier Voltage when the output is at the mid-phase point Difference of voltage when the output is at the mid-phase point Saturation output voltage Control-input reference voltage Voltage gain between control input and output Difference of voltage-gain between phases Error amplifier reference voltage Error amplifier input current Error amplifier output level Current-limiting reference voltage Intermediate level of discriminator output is measured 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 fosc = 492 kHz fosc = 492 kHz fosc = 492 kHz IL = 200 A When 12 V is applied When 12 V is applied When 0 V is applied Io = 0.7 A, sum of upper and lower transistors FLT-pin voltage for which motor rotates Source side Sink side Source and sink sides Test conditions When the circuit is switched on. Excludes the injector current. When only the minimal circuit is switched on. Limits Min 9 -- -- 5.1 -- -- 1.05 16.65 20.82 26.00 -- 2.0 -0.2 2.2 0.6 0.36 Typ 18 -- 0.4 6.3 -- 2.8 1.20 18.05 23.80 28.00 -- 2.2 -0.02 2.5 0.8 0.40 Max 28 300 4.0 7.1 0.2 3.2 1.35 25.10 26.81 30.00 2 2.4 mA A A V V V V dB dB dB dB V A V V V Unit
GV Vref IIN*E VO*E VCL
3.1 1.05 0.44
VIN IIN Vinj VoDSC T
Function- input threshold voltage Current input to the function-input pins Injector pin voltage Discriminator output level 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 A
fosc IinjMAX IinjMIN VOLFG I1FG IINMOD
Oscillation frequency Injector max. operating current Injector min. operating current FG amplifier output low level (monitor) FG amplifier output pin leakage current (monitor) Current input to the MOD pin
-0.2 25 -- -- -- 435 -75
-- -- -- 0.1 -- 565 -98
0.2 -- 4 0.2 1.0 800 -140
% mA mA V A A A
Rev.1.00, Sep.22.2003, page 4 of 6
M56733AFP
Application Example
R7 R5
U *R 8 *R 9 *C 11 *C 12 R6 36 35 34 33 32 31 30 29 28 27 26 25 24
V
W R4 C10
R3
*R 10 *C 13
C9 23 22 21 20 19
M56733AFP
1 2 3 R2 R1 + C3 X1 C6 C1 VCC + FG C2 C5 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 C7 C8 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
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 EN Lo Hi Lo DISABLE DISABLE Hi ENABLE DISABLE
5. Mode function
Mode pin Lo M Hi (MOD 0.8V) (Open) (MOD V 2.6V) FG synchronization frequency fosc/1640Hz fosc/820Hz fosc/ (4100/3) Hz
Rev.1.00, Sep.22.2003, page 5 of 6
36P2R-D
JEDEC Code -- e b2
19
M56733AFP
MMP
Weight(g) 0.53 Lead Material Cu Alloy
Plastic 36pin 450mil SSOP
EIAJ Package Code SSOP36-P-450-0.80
Package Dimensions
36
HE
E
L1
L
Rev.1.00, Sep.22.2003, page 6 of 6
e1
F
Recommended Mount Pad
Symbol
18
1
A
G
D
A2 y
b
A1
e
A A1 A2 b c D E e HE L L1 z Z1 y c
z Detail G Detail F
Z1
b2 e1 I2
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 -- --
I2
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