FS212-A Feeling Technology Corp., FS212-A Datasheet - Page 9

• Manufacturer Part Number: FS212-A
• Description: 2-Phase DC Motor Drive IC
• Manufacturer: Feeling Technology Corp.

FS212
Technology
Darlington-pair Transistor Output
The Fig 6 is the circuit diagram of Darlington-pair transistor. Under the heavy current
loading, the power loss of the high saturation voltage can be calculated into the following
formula:
Pc= (V
+V
) * I
BEQ1
CE(SAT)Q2
O
According to the IC package and the curve of the power loss, the Pc should be applied to
and within the safety value.
30V is the voltage of Zener breakdown diode. However, if the voltage, excluding that of the
power supply, is more than 30V under the long-time operation, the diode will be destroyed.
2,3
+
V
CE(SAT)
Q
2
_
Q
1
+
V
_
BE
Fig 6 Darlington-pair Transistor Output
Rev0.4 April.08, 2003
9
P
/FS212