upd16882 Renesas Electronics Corporation., upd16882 Datasheet - Page 8

• Manufacturer Part Number: upd16882
• Description: Monolithic Cd-rom/dvd-rom 3-phase Spindle Motor Driver
• Manufacturer: Renesas Electronics Corporation.

7. FUNCTION OPERATION TABLE
(1) ST/SP (start/stop) function
• • • • ST/SP = “H”
During regeneration (brake), the input signal goes through the channel of the high-side Pch MOSFET.
• • • • ST/SP = “L”
(2) Torque control
8
OUT0
Turning ON/OFF the spindle can be controlled by the ST/SP pin while the oscillator is operating. When the
ST/SP pin is high, the spindle is activated (operating); when it is low, the spindle stops. When the spindle stops,
the MOSFET at the high side is ON and the MOSFET at the low side is OFF, serving as a short brake.
The output stage is driven by applying a differential voltage between the control reference voltage (ECR) and
control input voltage (EC) pins (ECR-EC). With this product, the ECR-EC differential voltage and output PWM
duty have a linear relationship. The input deadband is ±50 mV TYP. and the duty of the standard model is 100%
at 0.75 V (excluding the deadband).
The µ PD16882 also has a break selection pin (BRsel). When this pin goes high, ECR is less than EC and the
brake is applied in the reverse direction (refer to the figure and table on the next page).
OUT0
H
H
H
H
H
H
L
L
L
L
L
L
−
Drive Timing (Motor Output Signal)
OUT1
H
H
H
H
H
H
L
L
L
L
L
L
OUT1
−
Input Signal
OUT2
H
H
H
H
H
H
L
L
L
L
L
L
OUT2
−
Low-side PWM
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
PWM
Data Sheet S13966EJ1V0DS
−
Excited (operates)
Regeneration (brake)
Excited (operates)
Regeneration (brake)
Excited (operates)
Regeneration (brake)
Excited (operates)
Regeneration (brake)
Excited (operates)
Regeneration (brake)
Excited (operates)
Regeneration (brake)
Short brake
Circuit Operation
Circuit Operation
Excited Phase
W → U
U → W
W → V
V → W
V → U
U → V
µ µ µ µ PD16882