TDA5147CH データシートの表示（PDF） - Philips Electronics

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TDA5147CH

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

Preliminary specification

TDA5147CH

FEATURES

Spindle motor driver

• Internal 2 A peak current power drivers

• Low Rds(on) (1 Ω maximum 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 Pulse Width Modulation (PWM)

spindle mode

• Provide spindle active dynamic braking mode.

• Retract circuit operates down to 2 V

• Internal thermal sense circuitry with an over temperature

shut down option

• Internal boost voltage generator

• Sleep mode.

Thermal warning circuit

• Output active 15 °C before general thermal shutdown.

APPLICATIONS

• Hard disk drive for Personal Computer products.

Voice coil motor driver

• 1.2 A 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 modes of operation:

– Enable VCM

– Retract

– Disable

• Brake after park circuitry.

Power monitor and retract circuit

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

• Hysteresis on both power monitor comparators

• Internal voltage reference: precision 2%

• Buffered reference voltage output pin

GENERAL DESCRIPTION

The TDA5147CH is an ASIC combination chip that

includes the following functions:

spindle motor driver

voice coil motor driver

retract

Power-on.

The circuit is contained in a 64-pin QFP package.

The TDA5147CH is controlled by a custom digital ASIC

(see Chapter “Application Information”). 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 pin SIPWM).

Control of the VCM circuits is via the VIPWMH and VIPWML

input signals. These inputs provide control of the voice coil

current.

ORDERING INFORMATION

TYPE

NUMBER

TDA5147CH

NAME

QFP64

PACKAGE

DESCRIPTION

plastic quad flat package; 64 leads (lead length 1.6 mm);

body 14 × 14 × 2.7 mm

VERSION

SOT393-1

1997 Jul 09

2

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