BD8203EFV 데이터 시트보기 (PDF) - ROHM Semiconductor

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BD8203EFV

5ch System Motor Driver

ROHM Semiconductor 

BD8203EFV

(8) Start-up Sequence Regulations

REGRST

REGCTL

REG5

MUTE4

MUTE123

If the signal is input before standing up of REG5, the leakage voltage is generated in REG5.

FWD

RVS

After REG5 stands up, the control signal is

turned on.

The control signal is turned off before REG5

stands and it descends.

Terminal ※ where the destination of hanging the diode on the power supply side is REG5 must defend

the above-mentioned sequence so as not to impress the voltage more than the voltage of REG5

terminal.

Please insert in the cereal and use the limit resistance for the terminal when you impress the voltage

more than the voltage of REG5 terminal.

(Limit resistance 10kO or more is inserted in the cereal about REGCTL terminal. )

※Terminal where destination of hanging diode on power supply side is REG5

REGCTL、MUTE123、MUTE4、VCI、RVS、FWD、IN１、IN2、IN3、IN4、OPIN＋、OPIN-、VCTL

Method of Calculating Gain

(a) Loading

VCTL

VIN

FWD RVS

VIAMP

Level

shift

10kΩ

10kΩ

0.705×2×VIN + Vref

×2 VO+

×2

VO-

- 0.705×2×VIN + Vref

10kΩ 10kΩ

VVO+

Vref

VVO-

×0.705

It becomes 2×2=4times between outputs.

(b) Focus, Tracking, Sled, Spindle

Vref

※

(VPVCC2-0.7)/2

Total Gain = 0.705×2×2 = 2.82 = 9dB

VIN

Vc

IN

VIAMP

40kΩ

40kΩ

×1

Vc

Level shift

１0kΩ

１0kΩ

80kΩ

40kΩ

×2×VIN

+

Vref

×2 VO+

×2

VO-

8400kkΩΩ×2×VIN + Vref

１0kΩ １0kΩ

VVO+

Vref

VVO-

80kΩ

40kΩ

=×2

Vref

※

CH1,2=VPVCC1/2

CH2,3,4=(VPVCC2-0.7)/2

It becomes 2×2=4times between outputs.

Total Gain = 2×2×2 = 8 = 18dB

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TSZ22111・15・001

10/22

TSZ02201-0H5H0BK01520-1-2

04.Nov.2015 Rev.001

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