BD6670FM Datasheet, PDF (1/17 Pages) Rohm – 3Phase spindle motor driver for CD-RW

Motor driver ICs
BD6670FM
3Phase spindle motor driver for CD-RW
BD6670FM
BD6670FM is a 3-phase spindle motor driver adopting 180° PWM direct driving system. Noise occurred from the motor
driver when the disc is driver can be reduced. Low power consumption and low heat operation are achieved by using
DMOS FET in output and driving directly.
!Applications
CD-RW
!Features
1) 180 degree Direct-PWM driving system.
2) Built in power save circuit.
3) Built in current limit circuit.
4) Built in FG-output.
5) Built in 3phase synthesized FG-output.
6) Built in hall bias circuit.
7) Built in reverse protection circuit.
8) Built in short brake circuit.
9) Low consumption by MOS-FET.
10) Built in capacitor for oscillator.
11) Built in gain switch and current limit switch.
!Absolute maximum ratings (Ta=25°C)
Parameter
Symbol
Limits
Power supply voltage
VCC
7
Supply voltage for motor
VM
15
VG pin voltage
Output current
Power dissipation
VG
IOMAX
Pd
20
2500 ^∗1
2200 ^∗2
Junction temperature
TJMAX
150
Operating temperature range
Topr
−20~+75
Storage temperature range
Tstg
−55~+150
∗1 However, do not exceed Pd, ASO and Tj=150°C.
The current is guaranteed 3.0A in case of the current is turn on / off
in a duty-ratio of less than 1/10 with a maximum on-time of 5msec.
∗2 70mm×70mm×1.6mm glass epoxy board.
Debating in done at 17.6mW / °C for operating above Ta=25°C.
Unit
V
V
V
mA
mW
°C
°C
°C
!Recommended operating conditions
Parameter
Symbol Min. Typ. Max.
Unit
Power supply voltage
VCC
4.5
−
5.5
V
Supply voltage for motor
VM
4.0
−
13.2
V
VG pin voltage
VG
8.5
−
19
V
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