TDA5147K Ver la hoja de datos (PDF) - Philips Electronics

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TDA5147K

12 V Voice Coil Motor (VCM) driver and spindle motor drive combination chip

Philips Electronics 

Philips Semiconductors

12 V Voice Coil Motor (VCM) driver and

spindle motor drive combination chip

Product specification

TDA5147K

FEATURES

Spindle motor driver

• Internal 1 A peak current power drivers

• Low Rds(on) 1 Ω max total for high, low and isolation

drivers

• Induction sense start-up option

• External current sense resistor

• Soft switching on both upper and lower drivers

• Programmable linear or PWM spindle mode

• Provide spindle active dynamic braking mode.

Voice coil motor driver

• 0.8 Amp VCM power driver

• Maximum of 1 V drop across the power driver at 0.8 A

• External current sense resistor, with sense amplifier

• External current control loop compensation

• 15 kHz (typ.) VCM current control loop bandwidth

• Three mode operation: enable VCM, retract, and

disable.

Power monitor and retract circuit

• +5 and +12 V power monitor threshold accuracy ±2%

• Hysteresis on both power monitor comparators

• Precision internal voltage generator ±2%

• Buffered reference voltage output pin

• Retract circuit operates down to 2 V

• Internal thermal sense circuitry with an over temperature

shut down option

• Internal boost voltage generator

• Sleep mode.

APPLICATIONS

• Hard disk drive for PC products.

GENERAL DESCRIPTION

The TDA5147K is an ASIC combination chip that includes

the following functions; spindle motor drive, voice coil

motor drive, retract, and power-on. The circuit is contained

in a 52-pin PLCC package.

The TDA5147K (see Fig.1) is controlled by a custom

digital ASIC. The custom ASIC provides the necessary

commutation sequences for the spindle drivers via the

SCNTL1, SCNTL2 and SCNTL3 inputs. Spindle speed is

monitored by comparator outputs SENU, SENV and

SENWIS. Motor speed control is accomplished by a PWM

signal (input at the SIPWM pin).

Control of the VCM circuits is via the VIPWMH and VIPWML

input signals. These two inputs provide control of the coil

current. The VISENSE2 output signal can be used to monitor

the voice coil current.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

Supply voltage

VCCA1

VCCA2

analog supply voltage 1

analog supply voltage 2

Drivers

Ispin(max)

IVCM(max)

maximum spindle current

maximum voice coil motor current

MIN.

TYP.

MAX.

UNIT

4.5

5.0

5.5

V

10.8

12.0

13.2

V

−

1

−

A

−

0.8

−

A

ORDERING INFORMATION

TYPE

NUMBER

TDA5147K

NAME

PLCC52

PACKAGE

DESCRIPTION

plastic leaded chip carrier; 52 leads

VERSION

SOT238-2

1996 Jul 26

2

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