PD16856_15 Datasheet, PDF (10/18 Pages) Renesas Technology Corp – MONOLITHIC CD-ROM 3-PHASE SPINDLE MOTOR DRIVER

µPD16856
FUNCTION OPERATION TABLE
(1) ST/SP = “H”
CMP0
H
H
H
H
H
H
L
L
L
L
L
L
Input Signal
CMP1
CMP2
H
L
H
L
L
L
L
L
L
H
L
H
L
H
L
H
H
H
H
H
H
L
H
L
PWM
H
L
H
L
H
L
H
L
H
L
H
L
Circuit Operation Mode
Operation
Brake
Operation
Brake
Operation
Brake
Operation
Brake
Operation
Brake
Operation
Brake
Brake: Regenerates via the high-side Pch MOS FET channel.
(2) ST/SP = “L”
CMP0
−
Input Signal
CMP1
CMP2
−
−
PWM
−
Circuit Operation Mode
Short brake
Short brake: Turns the high-side MOS FET on and the low-side MOS FET off.
Source → Sink
W→V
W→U
V→U
V→W
U→W
U→V
(3) Torque Command
The curve shown below is the relationship to torque of the difference (ECR – EC) between the control reference
voltage (ECR) and the control voltage (EC).
Duty cycle
100%
Normal direction torque
(–)
→ ECR–EC
(+)
–100%
Reverse direction torque
ECR > EC
ECR < EC
Reverse Rotation Pin Voltage (REV)
L
H
Normal rotation
Reverse rotation^Note
Reverse rotation^Note
Stop
Note Stops after detecting reverse rotation
The reverse drive current flows in the high-side Pch
MOS FET channel on reverse rotation.
8
Data Sheet S13447EJ1V0DS00