Pb Free
General Description
The FS277, a 1-chip composed of hall sensor and output coil drivers, applied to a 2-phase D...
Pb Free
General Description
The FS277, a 1-chip composed of hall sensor and output coil drivers, applied to a 2-phase DC motor. The high sensitivity of Hall effect sensor is suitable for motors from mini-type CPU coolers to blowers and DC fans. Typical operation current is 0.4A and operating voltage range is from 3.0V ~ 20V. Using few external components, FS277, a high performance integrated IC, is designed for a 2-phase DC motor circuit. The circuit diagram of the typical application example is as below.
Features
£» £» £» £» 1 chip hall sensor/drivers Wide operating voltage range: 3.0V~20V Output sink current up to 0.4A Package : TO-92SP-4 TO-92SP-4
Typical Application Circuit
VCC
FTC
S277
Rev0.2 Nov. 09, 2004(LF) P1/FS277
Functional Block Diagram
1
Regulator
2
Hall Sensor Pre-driver
AMP
3
4
MARK VIEW
PIN DESCRIPTION
NAME NO. STATUS DESCRIPTION
FTC
S277.
VCC
1
P
IC Power Supply Coil driver output It is low state during the N magnetic field. Coil driver output It is low state during the S magnetic field. IC Ground
NO
2
O
SO
3
O
1
2
3
4
GND
4
P
Rev0.2 Nov. 09, 2004(LF) P2/FS277
Absolute Maximun Ratings ( at Ta = 25 oC )
Zener Breakdown Voltage (Vz) ----------------------------------------------------------NO/SO Pin Voltage(off) ------------------------------------------------------------------VCC Pin Voltage -----------------------------------------------------------------------------Peak Sink Current (Io) Peak Current-----------------------...
