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TDA5147CH

Features: Spindle motor driver ` Internal 2 A peak current power drivers ` Low Rds(on) (1 W 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 M...

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SeekIC No. : 004516429 Detail

TDA5147CH: Features: Spindle motor driver ` Internal 2 A peak current power drivers ` Low Rds(on) (1 W maximum total) for high, low and isolation drivers ` Induction sense start-up option ` External current se...

TDA5147CH Data Sheet

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Part Number:
TDA5147CH
Supply Ability:
5000

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Product Details

Description



Features:

Spindle motor driver
         ` Internal 2 A peak current power drivers
         ` Low Rds(on) (1 W 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.


Application

· Hard disk drive for Personal Computer products.


Pinout

Connection Diagram


Specifications

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
VCC5 analog supply voltage 1 indefinite time period -0.3 +6.0 V
  -0.3 +7.0 V
VCCA12 analog supply voltage 2 indefinite time period -0.3 +13.5 V
  -0.3 +15.0 V
VSDRVU, VSDRVV,
VSDRVW and
VSDRVN		 output voltage spindle motor driver   -0.3 +20 V
Vn output voltage on other pins   -0.3 - V
Tstg IC storage temperature   -55 +125
Tj maximum junction temperature   - +150
Tamb operating ambient temperature   0 +70



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 of TDA5147CH is accomplished by a PWM signal (input at pin SIPWM).

Control of the VCM circuits TDA5147CH is via the VIPWMH and VIPWML input signals. These inputs provide control of the voice coil current.




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