TA84002F 데이터 시트보기 (PDF) - Toshiba

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TA84002F

PWM CHOPPER TYPE 2−PHASE BIPOLAR STEPPING MOTOR DRIVER

Toshiba 

OUTPUT STAGE

l The TA84002F is Multichip IC consisting of four

P−channel MOSFETs and one main chip.

l Four P−channel MOSETs are used as upper−side

power transistors.

l Output current is controlled by swiching

lower−side transistor.

l Durin CHOP ON, the current flows through

P−channel MOS, The motor winding, sink

transistor and sense resistor.

l During CHOP OFF, the current circulates the

motor winding, P−channel MOS and the diode of

P−channel MOS.

l Power dissipation is divided by the five chips.

: (1) CHOP ON

(Drive Mode)

Q1: ON, Q2: OFF

Q3: OFF, Q4: ON

: (2) CHOP OFF

(Slow Decay)

Q1: ON, Q2: OFF

Q3: OFF, Q4: OFF

: (3) ALL OFF

(Fast Decay)

TA84002F

3

2001-09-06

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