|
|
Part: FAN8620B
Category:
Power Management
-> Motor Controller/Drivers
-> DC Motor drivers/Controllers
-> DC Motor Drivers
Description: 12v Spindle Motor And Voice Coil Motor Driver
Company: Fairchild Semiconductor
Datasheet: Download FAN8620B datasheet File size : 400 kB
Request For quote: Find where to buy FAN8620B
Datasheet text preview:
www.fairchildsemi.com
FAN8620B
12V Spindle Motor and Voice Coil Motor Driver
Features
Spindle Motor Driver
· · · · · · · Soft commutation Spindle brake after retract Adjustable brake delay time 1.5A max. current power driver Low output saturation voltage: 1V typical @1.2A PWM decoder & filter for soft commutation The external circuit (ASIC) based start-up, commutation and motor speed control
Description
The FAN8620B is an ASIC combination chip, designed for the HDD application, it includes the following functions: spindle motor drive, voice coil motor drive, retract and power management. To drive and control the spindle, the external ASIC provides the appropriate control signals (Start up, commutation, speed control) to the FAN8620B. The spindle motor condition is monitored by the FG output and the motor speed control is accomplished via the PWMSP input. The ASIC controls the voice coil motor current via PWMH and PWML inputs and the power management circuit always monitors the power supply voltages.
Voice Coil Motor Driver
· · · · · · · Trimmed low offset current 1.2A max. current power driver Gain selection and adjustable gain Automatic power failure retract function Class AB linear amplifier with no dead zone Low output saturation voltage: 0.8V typical @1.0A Internal full bridge with VPNP (Vertical PNP) & NPN transistors
48-QFPH-1414
Power Monitoring
· · · · Power on reset with delay Hysteresis on both power comparators Over temperature & over current shut down 5V and 12V power monitor threshold accuracy ±2%
Others
· Can be used with 5Volt and 3.3Volt control signals(CNTL1,CNTL2 & CNTL3) for ASIC Interface
Package
· 48QFPH (48 pin quad flat package heat-sink)
Typical Application
· Hard disk drive (HDD)
Ordering Information
Device FAN8620B Package 48-QFPH-1414 Operating Temp. 0 ~ 70°C
Rev. 1.0.0 May. 2000.
©2000 Fairchild Semiconductor International
1
FAN8620B
Pin Assignments
SENSE12 CBRAKE
PWMSP
TAB
CCOMP 38
BRAKE
PVCC1
CNTL3
CNTL2
CNTL1
CFSP
GND
48
47
46
45
44
43
42
41
40
39
U 37
PW MSF CFSF ADJ SENSE5 VDD FG
1 2 3 4 5 6
36 35 34 33 32 31
N SUBGND V PCS W SUBGND
TAB
FAN8620B
7 8 9 10 11 12 30 29 28 27 26 25
TAB
VREF MCLK HALFVCC POR CDLY GAINSEL
ERROUT VDD ERRIN VCM+ PGND SENSEOUT
13
14
15
16
17
18
19
20
21
22
23
24
CFVCM
PWMH
VC C
SUBGND
FILOUT
SENSE
CRET
PWML
CRET2
PVCC2
2
V C M-
RRET
TAB
FAN8620B
Pin Definitions
Pine 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 29 30 31 32 Pin Name PWMSF CFSF A DJ SENSE5 V DD FG V REF M CLK HALFVCC PO R CDLY GAINSEL PWMH PWML CF VCM CRET VCC FILOUT SENSE CRET2 PVCC2 VCM(-) SUBGND RRET SENSEOUT PGND VCM(+) ERRIN VDD ERRO UT SUBGND W I/O I O O I O O I I I O I O O O I O O Pin Function Description PWM input for spindle soft commutation Capacitor for spindle PWM soft commutation filter Reference voltage adjustable Adjustable threshold voltage to 5V 5V power supply Frequency generation to spindle speed Voltage reference output for ASIC power Clock from ASIC for commutation 1/2 VCC pin Fault output(Power On Reset & Thermal Shut Down) Delay capacitor for power on reset VCM current Amplifier gain selection PWM signal input (MSB) PWM signal input (LSB) Filter capacitor for VCM PWM control Delay capacitor for retract 12V power line VCM PWM output VCM current sense Amplifier input Power for VCM retract 12V power line for VCM output VCM negative output Ground Adjustable maximum retract current VCM current sense Amplifier output Ground VCM positive output VCM error Amplifier negative input 5V power supply VCM error Amplifier output Ground Spindle motor W phase output
3
FAN8620B
Pin Definitions (Continued)
Pine Number 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Pin Name PCS V SUBGND N U CCO MP BRAKE CBRAKE PVCC1 SENSE12 GND CNTL1 CNTL2 CNTL3 PWMSP CFSP I/O O O O O I I I I Pin Function Description Spindle output current sensing Spindle motor V phase output Ground Spindle motor neutral point Spindle motor U phase output Spindle output control compensation Dynamic brake Back-EMF charging capacitor for brake power 12V power line for spindle Adjustable for threshold voltage to 12V Ground Control input for spindle and brake Control input for start-up clock and soft commutation Control input for VCM Amplifier & retract PWM input for spindle speed control Filter capacitor for spindle PWM control
4
FAN8620B
Internal Block Diagram
POR Vreg
Power-on Reset
CNTL 1,2,3
Interface
FG MCLK
PW MSF Custom Digital ASI C Spindle Motor Driver
U V W N VCM+ V C M3-Phase BLDC Motor
PWMSP
GAINSEL PWMH
PWML
Voice Coil Motor
Voice Coil Motor Driver
Retract Brake
FAN8620B
5
Others parts begin by fa
FA-1 FA-2 FA-3 FA-4 FA-5 FA-6 FA-7 FA-8 FA-9 FA-10 FA-11 FA-12 FA-13 FA-14 FA-15 FA-16 FA-17
|
|
|
