TB6561FG Toshiba, TB6561FG Datasheet - Page 6

• Manufacturer Part Number: TB6561FG
• Manufacturer: Toshiba

Specifications of TB6561FG

• Functions: Driver
• Vopmax (vm*): 36V (40V)
• Io (lpeak): (1.5A)
• Channel: 2-ch
• Pwm Drive: direct PWM
• Package: SSOP30
• Rohs Compatible†: yes

Thermal Shutdown Circuit (TSD)
•
The IC incorporates a thermal shutdown circuit. When the junction temperature (T
output transistors are turned off.
After 50 μs (typ.), the output transistors are turned on automatically.
The IC has 40°C of temperature hysteresis.
OUT1
PWM control function
Applying a PWM signal of 0/5 V to the PWM pin allows motor speed control.
The IC enters CW (CCW) mode and short brake mode alternately in PWM current control.
To prevent shoot-through current caused by simultaneous conduction of upper and lower transistors in
the output stage, a dead time is internally generated for 300 ns (target spec) when switching the upper
and lower transistors.
Therefore, synchronous rectification for high efficiency in PWM current control can be achieved without
an off-time that is generated via an external input.
Even when toggling between CW and CCW modes, and CW (CCW) and short brake modes, the off-time
is not required due to the internally generated dead time.
T
ΔT
PWM ON
SD
Output voltage
SD
M
t1
waveform
= 160°C (target spec)
(OUT1)
= 40°C (target spec)
OUT1
PWM OFF → ON
t4 = 500 ns (typ.)
V
P-GND
CC
M
t1
OUT1
t2
V
P-GND
t3
PWM ON → OFF
t2 = 500 ns (typ.)
CC
t4
6
M
t5
OUT1
V
P-GND
CC
PWM ON
t5
M
OUT1
V
P-GND
CC
j
) reaches 160°C (typ.), the
V
P-GND
CC
PWM OFF
M
t3
TB6561FG
2010-08-17
V
P-GND
CC