ta84002fg TOSHIBA Semiconductor CORPORATION, ta84002fg Datasheet - Page 4

• Manufacturer Part Number: ta84002fg
• Description: Pwm Chopper-type 2 Phase Bipolar Stepping Motor Driver
• Manufacturer: TOSHIBA Semiconductor CORPORATION

OUTPUT STAGE
The TA84002F/FG is a multichip IC consisting of
four P-channel MOSFETs and one main chip.
The four P-channel MOSETs are used as
upper-side power transistors.
The output current is controlled by a switching
lower-side transistor.
During CHOP ON, the current flows through the
P-channel MOS, motor winding, sink transistor
and sense resistor.
During CHOP OFF, the current circulates the
motor winding, P-channel MOS and the diode of
the P-channel MOS.
Power dissipation is divided between the five
chips.
: (1) CHOP ON
: (2) CHOP OFF
: (3) ALL OFF
(Drive Mode)
Q1: ON, Q2: OFF
Q3: OFF, Q4: ON
(Slow Decay)
Q1: ON, Q2: OFF
Q3: OFF, Q4: OFF
(Fast Decay)
4
TA84002F/FG
2006-3-6