• The CLK input pin include built-in malfunction
prevention circuits for external pulse noise.
• Both an ENABLE and RESET pin are provided as
Schmitt trigger inputs with built-in 20 kΩ (typical) pull-
up resistors.
• No audible noise is generated by the differences in the
time constant between phases A and B when the motor
position is held fixed due to the adoption of external
excitation.
• The reference voltage Vref can be set to any level
between 0 and 1/2 V
CC
2. This allows the STK672-080
to provide microstepping operation even for small motor
currents.
<Driver Block>
• Provides a wide range of operatng supply voltage
required for external excitation PWM drive (V
CC
1 = 10
to 45 V).
• Current detection resistor (0.15 Ω) built-in the hybrid IC
itself.
• Power MOSFETs adopted for low drive loss
• Provides a motor output drive current of I
OH
= 2.8 A
(When Tc = 105°C).
No. 6507-2/17
STK672-080
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage1 V
CC
1 max No signal 52 V
Maximum supply voltage2 V
CC
2 max No signal –0.3 to +7.0 V
Input voltage V
IN
max Logic input pins –0.3 to +7.0 V
Phase output current I
OH
max 0.5 s, 1 pulse, when V
CC
1 applied. 3.3 A
Repeatable avalanche current Ear max 30 mJ
Power loss Pd max θc-a = 0 8 W
Operating substrate temperature Tc max 105 °C
Junction temperature Tj max 150 °C
Storage temperature Tstg –40 to +125 °C
Specifications
Absolute Maximum Ratings at Tc = 25°C
Parameter Symbol Conditions Ratings Unit
Supply voltage1 V
CC
1 With input signals present 10 to 45 V
Supply voltage2 V
CC
2 With input signals present 5 ±5% V
Input voltage V
IH
0 to V
CC
2 V
Phase driver voltage handling V
DSS
Tr1, 2, 3, and 4 (the A, A, B, and B outputs) 100 (min) V
Phase current 1 I
OH
1 Tc = 105°C, CLK ≥ 200 Hz 2.8 A
Phase current 2 I
OH
2 Tc = 80°C, CLK ≥ 200 Hz 3 A
Allowable Operating Ranges at Ta = 25°C
Parameter Symbol Conditions
Ratings
Unit
min typ max
Control supply current I
CC
Pin 6 input, with ENABLE pin held low. 2.1 14 mA
Output saturation voltage Vsat R
L
= 12 Ω 0.65 1 V
Average output current Io ave Load: R = 3.5 W/L = 3.8 mH per phase 0.445 0.5 0.56 A
FET diode Forward voltage Vdf If = 1 A 1 1.5 V
[Control Inputs]
Input voltage
V
IH
Except for the Vref pin 4 V
V
IL
Except for the Vref pin 1 V
Input current
I
IH
Except for the Vref pin 0 1 10 µA
I
IL
Except for the Vref pin 125 250 510 µA
[Vref Input Pin]
Input voltage V
I
Pin 7 0 2.5 V
Input current I
I
Pin 7, 2.5-V input 330 415 545 µA
[Control Outputs]
Output voltage
V
OH
I = –3 mA, pin MOI 2.4 V
V
OL
I = +3 mA, pin MOI 0.4 V
Electrical Characteristics at Tc = 25°C, V
CC
1 = 24 V, V
CC
2 = 5 V
Continued on next page.
Continued from preceding page.