tmp89fm82 TOSHIBA Semiconductor CORPORATION, tmp89fm82 Datasheet - Page 318

• Manufacturer Part Number: tmp89fm82
• Description: 8 Bit Microcontroller Tlcs-870/c1 Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

19.5
Three-phase PWM Output Unit
RA000
19.5.1.3
devices. Based on the value which is set in the dead time register (DTR), simultaneous On (short) for same
phase high side and Low side power devices during switching is protected.
Dead time circuit is a circuit to protect the shortage between the same phase High side and Low side power
Dead time circuit
High side Drive
voltage
Low side Drive
voltage
fx
u'
x'
v'
y'
w'
z'
Figure 19-14 PWM waveform with Dead time
ON delay
ON delay
ON delay
Generated PWM wave form
circuit
circuit
circuit
Figure 19-13 Dead Time Circuit
High/Low side
On voltage
shortage
Off voltage
Dead time
Dead time register
7, 6, 5, 4, 3, 2, 1, 0
PWM wave form with Dead time
DTR
Page 302
High/Low side
shortage
PMD control register
−
On voltage
Off voltage
−
MDCRA
5
4
−
−
−
−
Dead time
U
X
V
Y
W
Z
TMP89FM82