
TB6520P/PG
2006-3-6
3
PIN FUNCTION
PIN No.
SYMBOL
I / O
FUNCTIONAL DESCRIPTION
1
DUTY
I
Analog input pin to control PWM duty
VDUTY ≤ VAD (L)................. Duty 0%
VAD (L) < VDUTY < VAD (H) .. Duty change by VDUTY (1 / 128 to 127 / 128)
VDUTY ≥ VAD (H) ................ Duty 100% (127 / 128)
(
Note)
Duty becomes 100% when duty pin is open.
2
FG
O
Rotational frequency detection output
When stopped : LOW
When start is forcibly transferred : LOW
When normally rotated : 1pulse signal is output in one electric cycle.
4polar motor 2 pulses / rotation
8polar motor 4 pulses / rotation
3
4
XT,
XT
I
Crystal oscillation pin
Start transfer frequency fst, maximum transfer frequency fmx, and PWM frequency fp are
determined by outer oscillator frequency.
fst = fx / 218
fmx = fx / 210
fp = fx / 256
5
CMPSEL
I
Position detection signal 1phase input mode / 3phase input mode switching pin
HIGH or OPEN : 3phase input mode
LOW : 1phase input mode
Pullup resistor is built in
6
WAVEW
I
Wphase position detection signal input. Used by 3phase input mode. Pulldown resistor
is built in.
7
IP
I
Start position determination input
HIGH : Internal timer stopped
LOW : Internal timer started
Nontransfer operation when VDUTY > VAD (L), IP = HIGH (1phase excitation) Normal
operation when VDUTY > VAD (L), IP = LOW
8
STARTSP
O
START, STOP detection output
LOW : output on
HIGH : output off
9
GND
Ground
10
OC
I
Excess current detection signal input
When OC = “HIGH”, turn off the HIGH output of the switchon signal.
Pulldown resistor is built in.
11
WAVEU
I
At the time of 3phase input mode: Uphase position detection signal.
At the time of 1phase input mode: position detection signal.
Pulldown resistor is built in.
12
OUTW
O
Wphase switchon signal, 3state output.
13
OUTV
O
Vphase switchon signal, 3state output.
14
OUTU
O
Uphase switchon signal, 3state output.
15
WAVEV
I
Vphase position signal input. Used in 3phase input mode. Pulldown resistor is built in.
16
VDD
5 V supply pin