upd16858b Renesas Electronics Corporation., upd16858b Datasheet - Page 7

• Manufacturer Part Number: upd16858b
• Description: Three-phase Spindle Motor Driver For Monolithic Cd-rom
• Manufacturer: Renesas Electronics Corporation.

FUNCTION OPERATION TABLE
Brake: Regenerated via parasitic diode of high-side Pch MOS FET ( PD16858B).
Short brake: High-side MOS FET turns ON and low-side MOS FET turns OFF.
ECR > EC
ECR < EC
CMP0
CMP0
(1) ST/SP = “H”
(2) ST/SP = “L”
(3) Torque command
H
H
H
H
H
H
L
L
L
L
L
L
–
Regenerated via high-side Pch MOS FET channel ( PD16858C).
The relation between the difference between the control reference voltage (ECR) and control voltage (EC)
(ECR – EC) and torque is as follows:
CMP1
CMP1
H
H
H
H
H
H
L
L
L
L
L
L
–
Input Signal
Input Signal
Reverse Pin Voltage (REV)
Reverse
Forward
L
CMP2
CMP2
Note
( )
H
H
H
H
H
H
L
L
L
L
L
L
–
Reverse
Stop
PWM
PWM
H
H
H
H
H
H
H
L
L
L
L
L
L
–
Note
100 mV MAX
Circuit Operation Mode
Circuit Operation Mode
Operate
Brake
Operate
Brake
Operate
Brake
Operate
Brake
Operate
Brake
Operate
Brake
Short brake
Note
Data Sheet S13480EJ3V0DS00
100 %
Duty cycle
Stops if reverse revolution is detected.
During reverse revolution, the counter electromotive current flows
through the parasitic diode of the Pch MOS FET at the high side
( PD16858B), or the channel of Pch MOS FET at the high side
( PD16858C).
100 %
Forward torque
Reverse torque
100 mV MAX
Source
W
U
W
V
V
U
W
W
U
V
U
V
Sink
( )
ECR – EC
PD16858B/C
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