View AN8472SA_243650.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ICs for Compact Disc/CD-ROM Player
AN8472SA
Spindle motor driver IC for optical disk
s Overview
The AN8472SA is a high performance IC suited for driving a spindle motor of an optical disk such as CD-ROM, DVD etc. Small outline package can be used due to reduced power consumption by adopting the direct PWM drive system.
32 11.00.3 17
Unit: mm
6.10.3
s Features
* 3-phase full-wave 120 duty factor system * Low power consumption due to a direct PWM system * D-MOS transistor with low ON resistance (0.6 typ.) on the output stage * With start and stop pins * Thermal shut-down function built-in * With FG output pin * Reverse breaking by EC/ECR voltage * With Hall bias pin * Surface-mount small package
0.650.10
8.10.3
1
16
0.2-0.05
1.50.2
+0.10
(0.625)
0.65
0.3 -0.05
+0.10
Seating plane
0.650.10
0.10.1
(0.5)
SSOP032-P-0300
s Applications
* Optical disk drive of CD-ROM, DVD-ROM, CD-R, CD-RW etc.
1
AN8472SA
s Block Diagram
VDD BC4 BC3 BC2
ICs for Compact Disc/CD-ROM Player
VPUMP 12
18
16
15
14
13
Step-up voltage circuit Start 11 FG 10 H1H 7 H1L 6 H2H 5 H2L 4 H3H 3 H3L 2 VH 1 EC 8 ECR 9 FC 32 Oscillator VC1 Hall bias VT FF SRESET RNFOUT x5 Hall amp. matrix Distributor circuit Amp. PWMOUT 23 RNF2 26 RNF1 17 GND Amp. Output circuit Start/stop OSC Thermal protection
31
VM1
BC1
19 VM2 27 A11 28 A12 24 A21 25 A22 21 A31 22 A32
SSET
s Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 Symbol VH H3L H3H H2L H2H H1L H1H EC ECR FG Start VPUMP Description Hall bias pin Hall element-3 negative input pin Hall element-3 positive input pin Hall element-2 negative input pin Hall element-2 positive input pin Hall element-1 negative input pin Hall element-1 positive input pin Torque command input pin Torque command reference input pin FG signal output pin Start/stop changeover pin Booster pin Pin No. 13 14 15 16 17 18 19 20 21 22 23 24 Symbol BC1 BC2 BC3 BC4 GND VDD VM2 N.C. A31 A32 RNF2 A21 Description Booster capacitor connection pin 1 Booster capacitor connection pin 2 Booster capacitor connection pin 3 Booster capacitor connection pin 4 Ground pin Supply voltage pin Motor supply voltage pin 2 N.C. Drive output 3 Drive output 3 Current det. pin 2 Drive output 2
2
ICs for Compact Disc/CD-ROM Player
s Pin Descriptions (continued)
Pin No. 25 26 27 28 Symbol A22 RNF1 A11 A12 Description Drive output 2 Current det. pin 1 Drive output 1 Drive output 1 Pin No. 29 30 31 32 Symbol N.C. N.C. VM1 FC N.C. N.C.
AN8472SA
Description
Motor supply voltage pin 1 Oscillator pin
s Absolute Maximum Ratings
Parameter Supply voltage
*2
Symbol VDD VM1 VM2
Rating 6
Unit V
Drive output voltage
*5 *6
V(m) V(n) IDD
15 0 to VDD 30 1 200 30 293 -20 to +70 -55 to +150
V V mA mA mA mW C C
Control signal input voltage Supply current Drive output current Hall bias current
*7 *3 *4
I(o) IHB(n) PD
*1
Power dissipation
Operating ambient temperature Storage temperature
*1
Topr Tstg
Note) Do not apply external currents or voltages to any pins not specifically mentioned. For circuit currents, '+' denotes current flowing into the IC, and '-' denotes current flowing out of the IC. *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2: The voltage in the step-up voltage circuit exceeds the supply voltage. For the allowable value of the step-up voltage, refer to "s Electrical Characteristics". *3: The power dissipation shown is the value of independent IC without a heat sink at Ta = 70C. Refer to the PD Ta curves of the "s Application Notes" for details. *4: o = 19, 21, 22, 23, 24, 25, 26, 27, 28, 31 *5: m = 21, 22, 24, 25, 27, 28 *6: n = 8, 9, 11 *7: n = 1, 2, 3, 4, 5, 6, 7
s Recommended Operating Range
Parameter Supply voltage Symbol VDD VM1 VM2 Range 4.5 to 5.5 Unit V
3
AN8472SA
s Electrical Characteristics at Ta = 25C
Parameter Overall Circuit current 1 Circuit current 2 Start/stop Start voltage Stop voltage Hall bias Hall bias voltage Hall amplifier Input bias current In-phase input voltage range Minimum input level Torque command In-phase input voltage range Offset voltage Dead zone Input current Input/output gain Output High-level output saturation voltage Low-level output saturation voltage Torque limit current OSC Charging current Upper threshold voltage Lower threshold voltage FG FG output high-level FG output low-level In-phase input voltage range FG hysteresis width Step-up circuit Step-up voltage VPUMP FGH FGL VFGR HFG ICH VCH VCL VDD = 5 V VDD = 5 V VDD = 5 V VOH VOL ITL EC ECOF ECDZ ECIN ACS VDD = 5 V VDD = 5 V VDD = 5 V IBH VHBR VINH VDD = 5 V VHB VSTART VSTOP IDD1 IDD2 Symbol
ICs for Compact Disc/CD-ROM Player
Conditions VDD = 5 V in power save mode VDD = 5 V Voltage with which a circuit operates at VDD = 5 V and L H Voltage with which a circuit becomes off at VDD = 5 V and H L VDD = 5 V, IHB = 20 mA
Min
Typ
Max
Unit
0 9
0.1 14 0.7
mA mA
2.7
V V
0.7 1.5 60
1.3
1.6
V A V mV[p-p]
1 0 75 -1 0.48
5 4.0
VDD = 5 V, except for H2H, H2L VDD = 5 V
0.5 -100 0 -5 0.36 455 -65 1.75 0.35
3.9 100 150 0.60
V mV mV A A/V
VDD = 5 V, EC = ECR = 2.5 V VDD = 5 V, RCS = 0.33 VDD = 5 V, IO = -500 mA VDD = 5 V, IO = 500 mA VDD = 5 V, RCS = 0.33
0.15 0.15 570 -50 2.50 0.50 10
0.30 0.30 685 -35 3.25 0.65 0.5 3.0 20
V V mA A V V
VDD = 5 V, IFG = - 0.01 mA VDD = 5 V, IFG = 0.01 mA VDD = 5 V VDD = 5 V VDD = 5 V, VM1 = VM2 = 5 V
3 1.5 5
V V V mV
9.5
15
V
4
ICs for Compact Disc/CD-ROM Player
s Electrical Characteristics at Ta = 25C (continued)
* Design reference data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
AN8472SA
Parameter Thermal protection Thermal protection operating temperature Thermal protection hysteresis width
Symbol VDD = 5 V VDD = 5 V
Conditions
Min
Typ
Max
Unit C C
TSDON TSD
155 45
s Terminal Equivalent Circuits
Pin No. 1 Symbol VH Equivalent circuit
1
2
H3L
Pin 3, 7 2 k (typ.)
Pin 2, 6 2 k (typ.)
3
H3H
4
H2L 5 4 2 k (typ.) 2 k (typ.)
5
H2
6 7 8
H1L H1H EC
Refer to pin 2
VDD
9
ECR
9 1 k (typ.) 1 k (typ.) 8
5
AN8472SA
s Terminal Equivalent Circuits (continued)
Pin No. 10 Symbol FG
ICs for Compact Disc/CD-ROM Player
Equivalent circuit
VDD 50 k (typ.) 10
11
Start
11 41 k (typ.) 41 k (typ.)
12 13 14 15 16
VPUMP BC1 BC2 BC3 BC4
VM1 BC1 BC2 13 14 BC4 BC3 VPUMP 16 15 12
17 18 19
GND VDD VM2
Ground pin Supply voltage pin 19 31
VM1
21 22
24 25
27 28 A12 Pin 23, 26 RNF1, RNF2
20 21 22 23 24 25 26 27 28 6
N.C. A31 A32 RNF2 A21 A22 RNF1 A11 A12
N.C. Refer to pin 19
ICs for Compact Disc/CD-ROM Player
s Terminal Equivalent Circuits (continued)
Pin No. 29 30 31 32 Symbol N.C. N.C. VM1 FC N.C. N.C. Refer to pin 19 Equivalent circuit
AN8472SA
VDD 1 k (typ.) 32 1 k (typ.)
s Usage Notes
* Prevent this IC from being line-to-ground fault. (To be concrete, do not short-circuit any of A31 (pin 21), A32 (pin 22), A21 (pin 24), A22 (pin 25), A11 (pin 27) and A12 (pin 28) with GND pin (pin 17).) * Precaution must be taken on the pin 13 and pin 16 due to approximately 200 V of the static breakdown voltages. (C = 200 pF, R = 0 )
s Application Notes
* PD Ta curves of SSOP032-P-0300 PD T a
1.400 1.289 1.200 Mounted on standard board (glass epoxy: 50 x 50 x t0.8 mm3) Rth(j-a) = 96.9C/ W
Power dissipation PD (W)
1.000
0.800 0.668 0.600
0.400
Independent IC without a heat sink Rth(j-a) = 187.1C/ W
0.200
0.000 0 25 50 75 100 125 150
Ambient temperature Ta (C)
7
AN8472SA
s Application Notes (continued)
ICs for Compact Disc/CD-ROM Player
* Phase conditions between Hall input and output current Phase of Hall pin H1H A B C D E F H MH ML L ML MH H2H ML L ML MH H MH H3H ML MH H MH ML L
H1
H3
H2
H1
H2
H3
0
ECR EC 0 Emit Output current Sink Emit Output current Sink Emit Output current Sink A B C D E F 0 A3 A2 0 A1 0
8
ICs for Compact Disc/CD-ROM Player
s Application Circuit Example
AN8472SA
VDD = 5 V
0.1 F
0.1 F
(Connect this capacitor, if necessary, after checking operation.)
12 VPUMP
0.1 F
5V
18 VDD
16 BC4
15 BC3
14 BC2
13 BC1
Step-up voltage circuit START 11 100 2 200 pF 10 FG H1H 7 H1L 6 Amp. H2H 5 H2L 4 H3H 3 H3L 2 VH 1 100 Spindle speed control signal EC 8 ECR 9 FC 32 560 pF Oscillator VC1 Hall bias VT Hall amp. matrix Distributor circuit Amp. 22 A32 PWMOUT 23 RNF2 FF SRESET RNFOUT x5 26 RNF1 17 GND RCS = 0.33 Output circuit Start/stop OSC Thermal protection
31
VM1
19 VM2 27 A11 28 A12 24 A21 25 A22 21 A31
SSET
9

▲Up To Search▲

Price & Availability of AN8472SA

	To Download AN8472SA Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .