WAFER WIN
W49
3-Phase Motor Driver for CD-ROMs
The W49
series are ICs developed for CD-ROM spindle motor drives. These ICs possess a short brake and reverse-
rotation brake for two types of brake functions, and also contain FG output and rotation direction detection (FR) circuits,
making them high-functionality and high-performance ICs.
FApplications
CD-ROM, CD-R, CD-RW, DVD-ROM, and DVD-RAM
FFeatures
1) Three-phase, full-wave, pseudo-linear drive system.
2) Built-in power save and thermal shutdown functions.
3) Built-in current limiter and Hall bias circuits.
4) Built-in FG output.
FAbsolute
maximum ratings (Ta = 25_C)
5) Built-in rotation direction detector.
6) Built-in reverse rotation prevention circuit.
7) Built-in short brake pin.
Parameter
Applied Voltage
(with 5V power supply)
Applied Voltage
(motor power supply1)
Applied Voltage
(motor power supply2)
Power
W49
dissipation
Operating temperature
Storage temperature
Output current
Symbol
Vcc
V
M1
V
M2
Pd
Topr
Tstg
Iout
Limits
7
13.5
13.5
1700*2
-20~+75
-55~+150*5
1100
Unit
V
V
V
mW
℃
℃
mA
＊
1 Reduced by 17.6mW for each increase in Ta of 1℃ over 25℃.
＊
2 When mounted on a 70mmX70mmX1.6mm glass epoxy board.
Reduced by 13.6mW for each increase in Ta of 1℃ over 25℃.
＊
3 Reduced by 11.6mW for each increase in Ta of 1℃ over 25℃.
＊
4 Reduced by 8.0mW for each increase in Ta of 1℃ over 25℃.
＊
5 Tj should not exceed 150℃.
＊
6 Should not exceed Pd or ASO values.
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: server@ceramate.com.tw
Tel:886-3-3214525
Http: www.ceramate.com.tw
Page 1 of 11
Rev 1.1 May.9, 2002
Fax:886-3-3521052
CERAMATE [ CERAMATE TECHNICAL ]
