UPD16873 查看數據表（PDF） - NEC => Renesas Technology

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产品描述 (功能)

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UPD16873

MONOLITHIC 3-ASPECT SPINDLE MOTOR DRIVER

NEC => Renesas Technology 

µPD16873/A/B/C

(2) Torque order

The relation between difference (ECR-EC) in control standard voltage (ECR) and control voltage (EC) and the

torque is as follows.

Duty cycle

Forward torque

100%

65 mVtyp

0.75 Vtyp

→ ECR-EC

(−)

0.75 Vtyp

(+)

65 mVtyp

100%

Reverse torque

Input voltage difference (ECR-EC) and output PWM duty becomes related to the proportion.

In addition, it becomes reverse brake when input voltage is ECR < EC. It stops after the reverse rotation of the

motor is detected under reverse braking mode. If input voltage difference is zero (ECR = EC), it becomes short

brake mode.

Input voltage difference

Output mode

ECR > EC

Forward turn

ECR = EC

ECR < EC

Stop (short brake)

Reverse turnNote

Note After detecting reverse, it stops.

(3) Standby mode

By the setting of standby mode, the power supply inside µPD16873 can be made off.

Each output terminal at the time of standby mode becomes high impedance. Also, the oscillation block inside,

too, stops and it is possible for the circuit current to reduce.

STB terminal

“H” level

“L” level

Operation mode

Regular mode

Standby mode

Data Sheet S13870EJ1V0DS00

9

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