TB6556FGELDRY Toshiba, TB6556FGELDRY Datasheet - Page 17

• Manufacturer Part Number: TB6556FGELDRY
• Description: Motor / Motion / Ignition Controllers & Drivers Brushless DC Motor Controller
• Manufacturer: Toshiba
• Type: 3 Phase Full Wave Brushless Motor Controllerr

Specifications of TB6556FGELDRY

• Operating Supply Voltage: 7 V
• Supply Current: 8 mA
• Mounting Style: SMD/SMT
• Package / Case: SSOP-30
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Operating Waveform When Driven by Square Wave
Hall signal
Output waveform
Note: At startup, 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.)
the motor is rotating in the reverse direction to that of the TB6556F/FG controlling it (REV = HIGH).
H
H
H
W
W
U
V
Y
U
X
V
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
(CW/CCW = LOW, OS = HIGH)
ONU
. (See the diagram of output ON duty on
d
= 16/f
osc
e.
)
(s) (In more than V
osc
TB6556F/FG
= 4 MHz) and
2007-07-17
e
= 5.0 V)
e
. The