TB6556FG Toshiba, TB6556FG Datasheet - Page 17

• Manufacturer Part Number: TB6556FG
• Manufacturer: Toshiba

Specifications of TB6556FG

• Function: Controller
• Vopmax (vm*): 7V (12V)
• Io (lpeak): 2mA
• Sinusoidal Current Wave: yes
• Sensor-less: no
• Speed Feedback Loop: no
• Package: SSOP24
• Rohs Compatible†: yes

Operating Waveform When Driven by Square Wave
High)
Hall signal
Output waveform
Note: The motor is driven by a square wave when the Hall signals are 5 Hz or lower (f
To stabilize the bootstrap voltage, the lower outputs (X, Y, and Z) are always turned on at the carrier cycle
even during off time. At that time, the upper outputs (U, V, and W) are assigned dead time and turned off
at the timing when the lower outputs are turned on. (T
When the motor is driven by a square wave, acceleration or deceleration is determined by voltage V
motor accelerates or decelerates according to the ON duty of T
page 14.)
rotating in the reverse direction to that of the TB6556FG controlling it (REV = HIGH).
HW
HU
HV
W
U
V
Y
X
Z
Carrier cycle = f
T
ONL
W
Z
= carrier cycle × 8% (s) (Uniformity)
osc
/252 (Hz)
T
ONU
waveform
Enlarged
T
d
17
T
ONL
T
Dead time: T
d
d
varies with input V
ONU
(CW/CCW = LOW, OS = HIGH, SS =
. (See the diagram of output ON duty on
d
= 16/f
osc
e.
)
(s) (In more than V
osc
= 4 MHz) and the motor is
TB6556FG
2009-02-10
e
= 5.0 V)
e
. The