TDA5147K Datasheet, PDF (2/32 Pages) NXP Semiconductors – 12 V Voice Coil Motor VCM driver and spindle motor drive combination chip

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 R_ds(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 V_IPWMH and V_IPWML
input signals. These two inputs provide control of the coil
current. The V_ISENSE2 output signal can be used to monitor
the voice coil current.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
Supply voltage
V_CCA1
V_CCA2
analog supply voltage 1
analog supply voltage 2
Drivers
I_spin(max)
I_VCM(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