Document
ICs for Compact Disc/CD-ROM Player
AN8473SA
Spindle motor driver IC for optical disk
s Overview
The AN8473SA is an optical disk driver IC, featuring direct PWM drive, DMOS power drive, low ON resistance of output power MOS and 120° of duty-factor.
32 11.0±0.3 17
Unit: mm
6.1±0.3
s Features
• RON = 0.5 Ω (for both upper and lower) • 5 V single power source • Circuit current 7 mA (including step-up circuit current)
0.65±0.10
8.1±0.3
1
16
0.2–0.05
1.5±0.2
+0.10
(0.625)
0.65
0.3 –0.05
+0.10
s Applications
• Optical disk
Seating plane
0.65±0.10
0.1±0.1
(0.5)
SSOP032-P-0300
VDD
16
14
13
Start 11 FG 10 H1H 7 H1L 6 H2H 5 H2L 4 H3H 3 H3L 2 VH 1 EC 8 ECR 9 PWMSW 30
Start/ stop
Step-up voltage circuit OSC Thermal protection
12
VPUMP
s Block Diagram
BC2 BC1
17 18 32 31
VM21 VM22 VM11 VM12 A11 A12 A21 A22 A31 A32 PG2 PG1 CS GND
Amp. Hall amp. matrix Distributor circuit PWMOUTU Amp. PWMOUTL FF Absolute value PWM frequency changeover circuit VT SRESET SSET VC1 ×5 Output circuit
27 28 24 25 21 22 23 26 19 15
Hall bias
1
AN8473SA
s Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol VH H3L H3H H2L H2H H1L H1H EC ECR FG Start VPUMP BC1 BC2 GND VDD 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 Booster capacitor connection pin 1 Booster capacitor connection pin 2 Ground pin Supply voltage pin
ICs for Compact Disc/CD-ROM Player
Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
Symbol VM21 VM22 CS N.C. A31 A32 PG2 A21 A22 PG1 A11 A12 N.C.
Description Motor supply voltage pin 2 Motor supply voltage pin 2 Current det. pin N.C. Drive output 3 Drive output 3 Power current det. pin 2 Drive output 2 Drive output 2 Power current det. pin 1 Drive output 1 Drive output 1 N.C.
PWMSW PWM frequency changeover pin VM12 VM11 Motor supply voltage pin 1 Motor supply voltage pin 1
s Absolute Maximum Ratings
Parameter Supply voltage
*2
Symbol VDD VM11, 12 VM21, 22
Rating 6.5
Unit V
Drive output voltage
*5 *6
V(m) V(n) IDD
15 0 to VDD 30 ±1 200 30 293 −30 to +85 −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 = 25°C. *2: The voltage in the step-up voltage circuit exceeds the supply voltage. For the allowable value of the step-up voltage, refer to.