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TDA5147CH Fiches technique(PDF) 2 Page - NXP Semiconductors

No de pièce TDA5147CH
Description  12 V Voice Coil Motor VCM driver and spindle motor drive combination chip
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

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1997 Jul 09
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Philips Semiconductors
Preliminary specification
12 V Voice Coil Motor (VCM) driver and
spindle motor drive combination chip
TDA5147CH
FEATURES
Spindle motor driver
• Internal 2 A peak current power drivers
• Low R
ds(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.
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
• 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.
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
PACKAGE
NAME
DESCRIPTION
VERSION
TDA5147CH
QFP64
plastic quad flat package; 64 leads (lead length 1.6 mm);
body 14
× 14 × 2.7 mm
SOT393-1


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