Ordering number : ENA0760A
STK681-300
Thick-Film Hybrid IC
Forward/Reverse Motor Driver
http://onsemi.com
Overview
The STK681-300 is a hybrid IC for use in current control forward/reverse DC motor driver with brush.
Applications
• Office photocopiers, printers, etc.
Features
• Allows forward, reverse, and brake operations in accordance with the external input signal.
• 2.9A startup output current and 5A peak brake output current.
• Incorporating a current detection resistor (0.10Ω), fixed current control is possible.
• Obviate the need to design for the dead time in order to turn off the upper- and lower drive devices when switching
between the forward and reverse operation mode.
Specifications
Absolute maximum ratings at Tc = 25°C
Parameter
Symbol
Conditions
Ratings
unit
Maximum supply voltage 1
VCC1 max
VCC2=0V
52
V
Maximum supply voltage 2
VCC2 max
No signal
-0.3 to +7.0
V
-0.3 to +7.0
V
2.9
A
5
A
Input voltage
VIN max
Logic input pins
Output current
IO max
Brake current
IOB max
VCC2=5.0V, DC current
VCC2=5.0V, square wave current, operating time 12ms
(single pulse)
Allowable power dissipation
PdPK max
Operating substrate temperature
Tc max
Junction temperature
Tj max
Storage temperature
Tstg
No heat sink
3.1
W
105
°C
150
°C
-40 to +125
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
May, 2013
62911HKPC 018-08-0006/70908HKIM No. A0760-1/10
STK681-300
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
unit
Operating supply voltage 1
VCC1
With signals applied
10 to 42
V
Operating supply voltage 2
VCC2
With signals applied
5±5%
V
Input voltage
VIN
0 to VCC2
V
Output current 1
IO1
VCC2=5.0V, DC current, Tc≤70°C
2.9
A
Output current 2
IO2
VCC2=5.0V, DC current, Tc=90°C
2.4
A
Output current 3
IO3
VCC2=5.0V, DC current, Tc=105°C
2.1
A
Brake current
IOB
VCC2=5.0V, square wave current, operating time 1.3ms,
Tc=105°C
5
A
Refer to the graph for each conduction-period tolerance range for the output current and brake current.
Electrical Characteristics at Tc = 25°C, VCC1 = 24V, VCC2 = 5.0V
Parameter
Symbol
VCC2 supply current
Conditions
ICCO
min
typ
max
unit
Forward or reverse operation
1.7
4
If=1A (RL=23Ω)
1.0
1.6
V
mA
FET diode forward voltage
Vdf
Output saturation voltage 1
Vsat1
RL=23Ω, TR1, TR2
0.80
1.1
V
Output saturation voltage 2
Vsat2
RL=23Ω, F1, F2+current detection
resistance
0.34
0.48
V
50
μA
Output leak current
IOL
TR1, TR2, F1, and F2 OFF operation
Input high voltage 1
VIH1
IN1, IN2 pins
4.0
Input high voltage 2
VIH2
INH pin
2.5
Input low voltage
VIL
IN1, IN2, INH pins
Input current 1
IIH1
IN1, IN2 pins, VIH1=5V
0.10
Input current 2
IIH2
INH pin, VIH2=5V
0.30
Current set ting voltage
Vref1
Between pins Vref1 and S.P
V
V
0.6
V
0.20
0.40
mA
0.60
1.2
mA
0.29
V
Note: A fixed-voltage power supply must be used.
Package Dimensions
unit:mm (typ)
29.2
25.6
(20.47)
4.5
11.0
14.5
19
(3.5)
1
14.5
(R1.7)
7.2
14.4
(5.0)
(5.0)
(12.9)
2.0
1.0
(5.6)
0.52
18 1.0=18.0
4.2
0.4
8.2
(20.4)
No. A0760-2/10
STK681-300
Derating Curve of Motor Current, IO, vs. STK681-300 Operating Board Temperature, Tc
IO - Tc
3.5
Motor current, IO - A
3.0
2.5
2.0
1.5
1.0
0.5
0
0
10
20
30
40
50
60
70
80
90
100
Operating Substrate Temperature, Tc- °C
110
ITF02506
The range of DC operating current lies within the above derating curve in the VCC1 allowable operating range.
The above motor current IO is valid within the chopping operating range of VCC1=28V or lower.
The above operating substrate temperature, Tc, is measured immediately when the motor is started.
Since Tc fluctuates due to the ambient temperature, Ta, the motor current value, and continuous or intermittent
operations of the motor current, always confirm this values using an actual set.
STK681-300 Allowable Brake Current Range
IOB - t
6
Brake Current, IOB - A
5
Tc=25°C
4
90°C
80°C
3
2
70°C
105°C
1
0
1.0
2
3
5 7 10
2
3
5 7 100
Conduction Time, t - ms
2
3
5 7 1000
ITF02507
No. A0760-3/10
STK681-300
Internal Block Diagram
NC
11
NC VCC1 OUT1 OUT2 VCC1 NC
10
9
8
6
7
5
TR1
TR2
F1
F2
NC
4
IN1 12
13 IN2
15 VCC2
82kΩ
Vref1a
16
Current
control
INH 14
RSI
19
Overheating
current control
5.1kΩ
Rs
0.10Ω
RSO
3
1 GND
2 S.P
Vref1b
18
17 Vref2
ITF02477
Sample Application Circuit
STK681-300
VCC2=5V
15
7
IN1
12
9
IN2
13
INH
14
8
Vref2 17
6
C2
10μF/50V
VCC1=24V
OUT1
+
CCW
Motor
OUT2
CW
Vref1a
16
Vref1b
18
4 NC
RSO
3
5 NC
RSI
19
10 NC
+ C1
at least 47μF/50V
11 NC
2
1
GND
S.P
ITF02476
No. A0760-4/10
STK681-300
Motor Drive Conditions (H: High-level input; L: Low-Level Input)
IN1
IN2
INH
Stop 1 (standby)
H
H
H or L
Stop 2 (supply power turned off by input during
H
H
H
H
L
H
L
H
H
H
L
L
Reverse (CCW)
L
H
L
Brake
L
L
L or H
motor rotation)
Forward (CW)
Remarks
When motor is not rotating
Stop signal that is applied when the motor is
running and used to turn off power.
No input signal is needed that turns off the
upper- and lower-side drive devices when
switching the rotational direction.
GND side MOSFET ON
* IN1=IN2=H and INH=L are prohibited during motor rotation.
Notes
(1) Be sure to set the capacitance of the power supply bypass capacitor, C1, so that the ripple current of the capacitor,
which varies as motor current increases, falls within the allowed range.
(2) Although the Vref2 pin is kept open, if connected to the GND or S.P pin, the overheating current control circuit
ceases to function.
(3) Fixed current chopping operations based on TR1 and TR2 are used for current control. The timing given below is
used for OUT1 or OUT2 voltage output and for TR1 or TR2 collector current.
OUT1 or OUT2
Output voltage
VCC1-Vsat1
GND
IO peak (current setting value)
TR1 or TR2
Collector current
50μs
Motor current
0A
IO peak (current setting value)
0A
(4) Do not connect the N.C pins shown in the internal block diagram or sample application circuit to a circuit pattern on
the PCB.
(5) This IC is not designed for use in an H-bridge driver for power supplies because the I/O response time of its GND
side driving device, required when switching the motor rotational direction, is several scores of microseconds.
It should be used only for DC motor drivers.
No. A0760-5/10
STK681-300
(6) Sample Timing Diagram
IN1
IN2
INH
Forward
rotation
Stop 1
Brake
Reverse
rotation
Brake
Forward
rotation
Stop 2
Forward
rotation
Reverse
rotation
Stop 1
Stop 2
IN1
IN2
INH
Forward
rotation
Stop 1
Brake
Reverse
rotation
Reverse
rotation
Stop 1
Brake
(7) Smoke Emission Precautions: There is a possibility of smoke emission if the hybrid IC is subjected to physical or
electrical damage as the result of being used without compliance with the specifications.
I/O Functions of Each Pin
Pin Name
Pin No.
IN1
12
Function
Input pin for turning TR1 and F1 ON and OFF
At high level, TR1: ON and F1: OFF; at low level TR1: OFF and F1: ON
IN2
13
Input pin for turning TR2 and F2 ON and OFF
At high level, TR2: ON and F2: OFF; at low level, TR2: OFF and F2: ON
INH
14
Pin for turning TR1 and TR2 OFF; At high level TR1 and TR2: OFF
This pin is usually low or open.
OUT1
8
This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2.
OUT2
6
This pin connects to the motor and outputs source/sync current depending on conditions at IN1 and IN2.
Vref1a
16
This pin is used for current setting for constant-current operation performed with the Vrefa and Vrefb pins
Vref1b
18
connected
A voltage of 0.29V at Tc=25°C results for Vref1.
0.29V is set by connecting 82kΩ and 5.1kΩ in series.
Current detection resistance is Rs=0.10Ω. Set using IO peak=Vref1÷Rs.
Vref2
17
Be sure to usually leave this pin open.
S.P
2
Vref1 voltage can be lowered by connecting a resistor between the Vref1 and S.P pins.
RSO
3
The overheating control circuit can be made to stop operating by connecting this pin to the GND or S.P pin.
This pin is used to monitor the voltage across the current sensing resistor, Rs. Must be connected to the RSI
pin.
RSI
19
This pin is connected to the RSO pin and serves as an input to the circuit that compares the input with Vref1.
No. A0760-6/10
STK681-300
Technical Information
(1) Substrate temperature rise , ΔTc (no heat sink) - Internal average power dissipation, PdAV
ΔTc - PdAV
Substrate temperature rise, ΔTc - °C
80
70
60
50
40
30
20
10
0
0.5
0
1.0
1.5
2.0
2.5
3.0
Hybrid IC internal average power dissipation, PdAV - W
3.5
ITF02508
(2) Internal average power dissipation, Pd, in the DC current-motor current, IO, characteristics (typ values for Pd)
Pd - IO
VCC1=24V
VCC2=5.0V
7
6
5
5°
C
4
3
Tc
=1
0
Internal average power dissipation, Pd - W
8
2
°C
25
1
0
0.5
0
1.0
1.5
2.0
2.5
3.0
Motor current, IO - A
3.5
ITF02509
(3) Overheating current control characteristics
IO - Tc
3.5
Load 2Ω+5mH
Average current, IO - A
3.0
2.5
2.0
1.5
1.0
0.5
0
0
10
20
30
40
50
60
70
80
90
100 110 120
Operating substrate temperature, Tc- °C
ITF02510
Overheating current control functions to prevent driver failure if a motor lock malfunction occurs.
No. A0760-7/10
STK681-300
(4) Derating curve of the package power dissipation, PdPK, against the ambient temperature, Ta
PdPK - Ta
Allowable power dissipation, PdPK - W
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
20
40
60
80
100
120
Ambient temperature, Ta - °C
ITF02511
The package power dissipation, PdPK, refers to the internal average power dissipation, Pd, permissible if used
without a heat sink
Vdf - If
1.4
Vsat1, Vsat2 - IO
1.6
VCC1=24V,
VCC2=5.0V,
Tc=25°C
Tc=25°C
T
1.4
)
, F2
(F1
f
d
V
1.2
Vsat1, Vsat2 - V
1.0
Vdf - V
1,
TR
0.8
0.6
1.0
Vsat1
0.8
at2
f(
Vd
Vs
1.2
R2)
0.6
0.4
0.4
0.2
0.2
0
0
0
1
2
3
4
If - A
5
0
8pin-GND voltage, VOUT - V
2.0
Vsat1 - V
2A
1.5
2.9A
1.0
0.5
3
4
5
ITF02513
VOUT - VIH1
25
VCC1=24V,
VCC2=5.0V,
Tc=25°C,
OUT1-OUT2,
Pin load=1kΩ,
14pin=Low
IO=1A
0
2.5
2
IO - A
Vsat1 - VIH1
2.5
1
ITF02512
20
15
10
5
0
3.0
3.5
4.0
VIH1 - V
4.5
5.0
ITF02514
0
1
2
3
12pin-GND voltage, VIH1 - V
4
5
ITF02515
No. A0760-8/10
STK681-300
VOUT - VIH2
IIH1 - VIH1
250
VCC1=24V,
VCC2=5.0V,
Tc=25°C,
OUT1-OUT2,
Pin load=1kΩ,
12pin=High
20
VCC1=24V,
VCC2=5.0V,
Tc=25°C
200
15
IIH1 - μA
8pin-GND voltage, VOUT - V
25
10
5
150
100
50
0
0
1
0
2
3
4
5
14pin-GND voltage, VIH2 - V
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
ITF02517
TR1, TR2 - A.S.O
100
7
5
VCC1=24V,
VCC2=5.0V,
Tc=25°C
600
1.0
12, 13pin-GND voltage, VIH1 - V
IIH2 - VIH2
700
0.5
ITF02516
Tc=25°C,
Tj=150°C,
Single pulse
3
2
IC - A
10m
s
10
0m
s
1s
3
2
200
1.0
7
5
100
3
μs
300
0
10
400
10
7
5
s
1m
IIH2 - μA
500
2
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
14pin-GND voltage, VIH2 - V
ID - A
100
7
5
3
2
5.0
ITF02518
0.1
1.0
2
3
5
7
10
-Vce - V
2
3
5
7
100
ITF02519
F1, F2 - A.S.O
Tc=25°C,
Tj=150°C,
Single pulse
100
μs
10
7
5
3
2
1ms
10m
s
100
ms
1s
1.0
7
5
3
2
0.1
7
5
3
2
0.01
1.0
2
3
5
7
10
VDS - V
2
3
5
7
100
ITF02520
No. A0760-9/10
STK681-300
Input Pin Configurations
IN1, IN2
INH
14
12
or
13
1
1
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PS No. A0760-10/10