TB6572AFG*** Toshiba, TB6572AFG*** Datasheet - Page 14

• Manufacturer Part Number: TB6572AFG***
• Manufacturer: Toshiba

Specifications of TB6572AFG***

• Function: Controller
• Vopmax (vm*): 17V (30V)
• Io (lpeak): 20mA
• Sinusoidal Current Wave: yes
• Sensor-less: no
• Speed Feedback Loop: yes
• Package: QFP52
• Rohs Compatible†: yes

FGin
+
8.3
V
FG Amplifier/Hysteresis Comparator
•
•
•
•
•
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The FG amplifier supports pattern FG and incorporates an internal reference voltage of 2.5 V.
Entering a sine wave of 50 mV
The open loop gain is 45 dB (min) (design target value).
The FG amplifier is followed by a hysteresis comparator, which compares the FG output and
delivers it to the FGS.
The comparator has a single-side hysteresis of 250 mV for the 2.5 V reference voltage. The square
wave signal output from the FGS enters the internal counter.
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for
explanatory purposes.
The FGO output dynamic range is as follows:
The FGS has an open-collector output. Connect a pull-up resistor considering the following
characteristics.
The input current is 1 mA (max).
The FG comparator has a 1-μs filter to improve the noise immunity of FGO at the falling edge of
FGS.
1.0 V to V
VFGS = 0.7 V (max) at IFGS = 1 mA
FGO
FGS
V
ref1
ref
− V at IFGO = ±200 μA
V
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FGin
−
pp
V
or greater results in a signal multiplied by the gain being output.
ref1
FGo
14
V
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250 mV (typ.)
V
ref1
2.75 V (typ.)
2.5 V (typ.)
V
ref1
TB6572AFG
V
2008-1-21
ref1
FGS