FS276-A Feeling Technology Corp., FS276-A Datasheet - Page 9

• Manufacturer Part Number: FS276-A
• Description: 2-Phase DC Motor Drive IC
• Manufacturer: Feeling Technology Corp.

APPLICATION NOTE
The Example of Typical Application Circuit
Fig 5 is the example of typical application circuit. The red, yellow, and black wires are the
input points of the motor system: red, the input of power supply; yellow, the output of FG;
black, the ground signal. R
signal. In view of the design, the value of R
voltage (V
The formula is:
For example:
V
I
The safety value of R
D1 is the reverse protection diode. As if the red and black wires reversely connect with the
power source, the current will flow through the ground via IC and coils L1 and L2 to power
supply. Under such kind of circumstances, the IC and coils are easy to be burned out.
Therefore, D1, the reverse protection diode, is necessary for the design. However, D1 will
also cause an extra voltage drop on the supply voltage.
C1 is a capacitor to reduce the ripple noise caused during the transient of the output stages.
The volume of the ripple noise depends on the coil impedance and characteristics.
C
C
= 10mA at 0.2V saturation voltage
= +5V for TTL level.
ON
), sink current (I
Technology
Output
FG
+Vcc
R
C
C
=
= 470Ω
R wire
B wire
Y wire
+Vc
V
C
Rc
−
I
C
C
C
V
), and off-level voltage (V
is an external pull-up resistance for the use of measuring FG
ON
Fig 5 Application Circuit
C
1
C
D
1
could be decided by the transistor saturation
VCC
Internal circuit of 2-phase DC motor
FS276
C
GND
).
NO
SO
L2
L1
FS276
Rev0.2 Aug.15, 2003
P
9
/FS210