M63029FP Renesas Technology, M63029FP Datasheet - Page 13

• Manufacturer Part Number: M63029FP
• Description: (M63028 / M63029) Spindle Motor and 5ch Actuator Driver
• Manufacturer: Renesas Technology

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M63028/029FP
Slide channel
The relationship between the differential voltage between SLIN and REF and the torque is shown in following Figure.
The voltage gain[Gvo] is 1.0 [V/V]. The current gain is 2.0[A/V] (at sensing resistor : 0.5 Ω and R1=∞, R2=0 Ω) in
forward torque directions, and the dead zone is from 0mV to 80mV (at R1=∞, R2=0 Ω)).
The coil current gain under the reverse torque is the same with in forward torque directions.And the limitation function
gets on when the differential voltage of VM2(12V) to RSL is 0.5V.
Therefore current-gain-control and current-limit of this IC is determined with sensing resister value.
Rev.1.0, Sep.16.2003, page 13 of 21
1.65 v
CTL
R2
R1
SPIN
REF
current limit
Rs
RSP
VM1
Dead zone
Reverse
GND
Gio
HW+
HU+
HV+
HW-
HU-
HV-
HB
W
U
V
current limit
Dead zone
Forward
Gio
Rh
5V
M