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TSZ02201-0H5H0BK01730-1-2

© 2016 ROHM Co., Ltd. All rights reserved.

26.Jan.2016 Rev.001

www.rohm.com

TSZ22111

• 15 • 001

BD8253EFV-M

Application Information

1. Driver Logic control terminal (CTL1, CTL2 & ACTMUTE) (Pin 19, 20, 38)

All driver's and spindle driver's brake mode can be switched ON/OFF by inputting H level (2V or more) or L levels (0.8V or

less) to these terminals. ACTMUTE can be used individually to Turn ON/OFF Actuator.

ACTMUTE Pin and VCC Pin can be short-circuited if the control logic with the control pin (CTL2) is ok.

▼ Driver Logic (Normal Operation)

CTL1

(Pin 19)

CTL2

(Pin 20)

ACTMUTE

(Pin 38)

SPINDLE

Output

SLED

Output

ACTUATOR

Output

LOADING

Output

L

L

-

Hi-Z

Hi-Z

Hi-Z

Hi-Z

H

L

-

Hi-Z

ACTIVE

MUTE

(Note 1)

ACTIVE

-

H

H

ACTIVE

(Note 2)

ACTIVE

ACTIVE

MUTE

(Note 1)

-

H

L

ACTIVE

(Note 2)

ACTIVE

MUTE

(Note 1)

MUTE

(Note 1)

(Note 1) Positive and Negative output of the driver output pull-up to Power/2 (=VREF)

(Note 2) Active state of spindle output is described in the following table (1-1).

▼Spindle Driver Logic table

CTL1

(Pin 19)

CTL2

(Pin 20)

ACTMUTE

(Pin 38)

SPIN > VC

SPIN < VC

L

H

-

Forward Mode

Reverse Braking Mode

H

H

-

Forward Mode

Short Braking Mode

▼ Driver Logic (UVLO, VC Protection Operation, TSD)

CTL1

(Pin 19)

CTL2

(Pin 20)

ACTMUTE

(Pin 38)

SPINDLE

Output

SLED

Output

ACTUATOR

Output

LOADING

Output

L

L

-

Hi-Z

Hi-Z

Hi-Z

Hi-Z

Other Condition

Hi-Z

Hi-Z

Mute

(note 1)

Mute

(note 1)

(Note 1) Positive and Negative output of the driver output pull-up to Power/2 (=VREF)

2. VCC Drop Mute (UVLO)

If VCC pin voltage becomes 3.8V (typ) or less, output of all channels turns OFF.

If VCC pin voltage becomes 4.0V (typ) or high, output of all channels turns ON again.

3. VC Drop Mute (VC DROP MUTE)

If VC pin voltage becomes 0.7V (typ) or less, output of all channels turns OFF.

Please set this value to a minimum of 1.2V for normal use.

Please refer to the above table for the details of Output status

4. Thermal Shutdown Circuit (TSD)

In order to prevent the IC from thermal destruction, IC has built in thermal shutdown circuit.

Thermal shutdown circuit is designed to turn OFF all output channels when the junction temperature (Tj) reaches 175°C

(Typ). IC operation begins again when the junction temperature decreases to 150°C (Typ) or less. Please refer the table (2)

above for detail of the output state. However, in this state also where the thermal shutdown is operating, and if heat is

applied from the outside continuously, thermal run-away may be carried out and it may result in destruction of IC.

5. Polarity of Output Pin

Positive and negative output of Actuator, Loading and SLED driver means the polarity of each inputs (FCIN, TKIN,LDIN,

SL1IN, SL2IN)

For example, FCO+>FCO- at FCIN>VC and FCO+<FCO- at FCIN<VC.