MITSUBISHI
M56733AFP
3-PHASE BRUSHLESS MOTOR CONTROL
DESCRIPTION
The M56733AFP is a semiconductor integrated circuit designed as a single chip controller for the FDD spindle motor. The IC is equipped with a power amplifier, hole amplifier, FG amplifier, oscillator, speed discriminator, and various types of protection circuits. Equipped with MOD pin that enables 3-speed switching with a single pin, the M56733AFP is very convenient to make system compact.
PIN CONFIGURATION (TOP VIEW)
VCC HB FG IN– FGIN+ FGMoni EN 1 2 3 4 5 6 7 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 HV+ HV– HW+ HW– ERROUT ERRIN– GND U V W HU+ HU– RF
FEATURES
q Provided with digital servo enabling high precision, high stability and non-adjustment. q 3-speed switching function with a pin . . . . MOD q Enable two systems . . . EN•EN q IO (peak)=1. 0A q Low capacitance of dumping capacitor
EN OSCIN GND
8 9 10 11 12 13 14 15
M56733AFP
APPLICATION
FDD spindle motor (5")
OSCOUT
MOD 16 FLT 17 18
RECOMMENDED OPERATING CONDITIONS
Supply voltage . . . . 10. 8 – 12. 0 – 13. 2 V Oscillation frequency . . . 492 kHz Maximum output current . . . 800 mA FG amplifier input signal level 5 mVp-p or more
DSCOUT
Outline 36P2R-D
BLOCK DIAGRAM
U 36 RF 31
V 35
W 34
FLT 17
ERROUT 20
ERRIN(–) 19
DSCOUT 18 7
VREF ERR OVSD CTL
12 GND 25 30 VCC 1 LOGIC TSD 1/N 16 MOD
EN CONTROL
OSC FG
33 32 HU+ HU–
24 23 HV+ HV–
22 21 HW+ HW–
2 Hall Bias
6 EN
13 EN
3 4 FG– FG+
5 FG (Monitor)
14 15 OSCIN OSCOUT
–
VREF
DISCRIMINATOR
–
MITSUBISHI
M56733AFP
3-PHASE BRUSHLESS MOTOR CONTROL
ABSOLUTE MAXIMUM RATINGS (Ta=25˚C)
Symbol VCC Io VHD VIN fIN Pt Kθ Tj Topr Tstg Supply voltage Output current Hole amplifie...
M56733AFP PDF File
