KA3032 データシートの表示（PDF） - Fairchild Semiconductor

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KA3032

5-Channel Motor Drive IC

Fairchild Semiconductor 

KA3032

Application Information

1. REFERENCE INPUT & MUTE

Pin 46 (REF) uses the reference input pin or the all mute input pin a reference input block circuit.

• Reference input

In the case of external reference input, the applied voltage range must be between 2[V] and 6.5[V] at VCC=8[V].

• All mute input

Using the all mute function pin, the applied voltage condition is as follows.

All mute on voltage

All mute off voltage

Below 0.5[V]

Above 2.0[V]

Mute function operation

Normal operation

2. SEPARATED CHANNEL MUTE FUNCTION

These pins are used for the individual channel mute operation.

• When the mute pins (pin22, 23 and 24) are high level, the mute circuits are activated so that the output circuit is muted.

• When the voltage of the mute pins (pin22, 23 and 24) are low level, the mute circuit is stopped and output circuits operate

normally.

• If the chip temperature rises above 175°C, then the thermal shutdown (TSD) circuit is activated and the output circuits

are muted.

- Mute 1, 2 (pin 24)-CH1, 2 mute control input pin.

- Mute 3 (pin 23)-CH3 mute control input pin.

- Mute 4 (pin 22)-CH4 mute control input pin.

3. PROTECTION FUNCTION

• Thermal shutdown (TSD)

If the chip temperature rises above 175°C, then the thermal shutdown (TSD) circuit is activated and the output circuit is

mute. The TSD circuit is temperature hysteresis about 25°C.

• Under voltage lockout (UVLO) and over voltage protection (OVP)

It is designed to mute operate the internal bias by the function of UVLO and OVP, when the power supply voltage falls

below 3.5[V] or above 20[V].

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