INTEGRATED CIRCUITS
DATA SHEET
TDA5149G
12 V Voice Coil Motor (VCM) driver
and spindle motor pre-driver
combination chip
Product specification
File under Integrated Circuits, IC11
1996 May 06
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
TDA5149G
FEATURES
APPLICATIONS
General features
• 12 V high-performance hard disk drives.
• Single-chip voice coil motor driver and spindle motor
pre-driver
GENERAL DESCRIPTION
• Internal voltage reference generator
The TDA5149G is a combination of a voice coil motor
driver and a spindle motor pre-driver, capable of operating
12 V high-performance hard disk drives.
• Programming of timing parameters via the serial bus
• Control of sleep, brake and disable modes for both the
VCM and spindle via the serial bus
The device integrates a spindle pre-driver that drives three
external N-channel power MOSFETs in order to drive a
three-phase brushless, sensorless DC motor in full wave
mode. In the normal mode, commutations are generated
from the internal Back EMF (BEMF) sensing circuitry.
Commutations, however, can also be generated from an
external source, thereby providing the possibility of driving
the motor in the stepper-motor mode.
• Temperature monitor circuit
• General purpose uncommitted operational amplifier.
Voice coil motor driver
• On-board full-bridge power DMOS driver with low RDSon
• Class AB linear amplifier with no dead zone
• Adjustable gain and bandwidth
The VCM driver is a linear transconductance amplifier
capable of handling currents up to 1.65 A. It allows
external adjustment of the gain and compensation.
The TDA5149G also contains two drivers for a latch that
secures the heads in the event of power-down.
• Retract circuit operating at power-down.
Spindle motor pre-driver
• Designed to drive external N-channel power MOSFETs
for brushless, sensorless DC motors
To control functions such as park, brake, sleep or disable
and to program the different timing parameters, the
TDA5149G is provided with a three-wire serial port. A high
precision voltage monitor is also included, for both
5 and 12 V power supplies. Finally, the IC contains a
temperature monitor circuit and an uncommitted
operational amplifier connected to VDD, which can be used
freely within the application. The device is contained in a
LQFP64 package with 4 pins connected to the lead frame
for improved heat dissipation.
• Internal or external commutation control
• Digital commutation timing
• Average motor supply current control with Pulse Width
Modulation (PWM)
• Soft switching under PWM control
• Spindle brake after park at power-down.
QUICK REFERENCE DATA
SYMBOL
VDD
VDDD
VDDA1
IoVCM
RDSon
PARAMETER
CONDITIONS
general supply voltage (pin 54)
digital supply voltage (pin 55)
analog supply voltage (pin 27)
voice coil motor output current
VCM power DMOS total on-resistance
(including leads and bond wires)
Tj = 25 °C
Tj = 125 °C
MIN.
10.8
4.5
4.5
−
−
−
TYP.
12.0
5.0
5.0
−
−
−
MAX.
13.2
5.5
5.5
1.65
0.65
1.1
UNIT
V
V
V
A
Ω
Ω
ORDERING INFORMATION
PACKAGE
TYPE
NUMBER
NAME
TDA5149G
LQFP64
1996 May 06
DESCRIPTION
plastic low profile quad flat package; 64 leads; body 10 × 10 × 1.4 mm
2
VERSION
SOT314-2
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
TDA5149G
BLOCK DIAGRAMS
handbook, full pagewidth
VDDD
55
VDDA1
27
from the
POR circuit
DGND AGND
64
16
BRAKEDELAY
51
47
IDRIVE
CAPY
12
1
63 CAPX1
to the
VCM
to the
LATCH
BRAKEPOWER
BRAKE
DELAY
CHARGE
PUMP
62 CAPX2
12 V
54 VDD
TDA5149G
45 H0
CLOCK
58
CLAMP
LHOLD
LACTIVE
VPARK
SCLOCK 60
VCM_CONT1 2
DRIVER
MOT1
VCM_CONT2 3
SDATA 59
SENABLE 61
SERIAL
PORT
VGAINSEL
4
SLEEP
5
5 L1
DRIVER
COMMUT. DELAYS
6 H2
SBRAKE
SCANOUT
to the
VCM
3 H1
1
DIGITAL
CONTROL
SDISABLE
25
DRIVER
MOT2
8 L2
SPINMODE
SCANTEST 56
COMMCLOCK
DRIVER
INIT
9 H3
FG 57
DRIVER
STOSC 24
SAWTOOTH
OSCILLATOR
MOT3
TRIGGER
11 L3
DRIVER
CSS2 dis
COMP
CSS2 23
1
SPWM comp 2
2
COMP
BEMF comp 2
CSS1 dis
CSS1 22
4 MOT1 3 kΩ
BEMF comp 1
CSS2 short
COMP
COMP
SPWM comp 1
3
7 MOT2 3 kΩ
2 MOT0 1 kΩ
COMP
BEMF comp 3
10 MOT3 3 kΩ
CSS1 short
LOOP1 select
19 ISPIN
from the
PWM DAC
0.4 V
13 SPINSENSEH
5×
INTG
14 SPINSENSEL
Rsense
21
20
18
15
RPOS
SICOMP
SINTIN
SISENS
Fig.1 Block diagram of the spindle part.
1996 May 06
3
MGE657
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
TDA5149G
Ccomp R
comp
handbook, full pagewidth
from the
serial port
−
VCM_CONT1
VCM_CONT2
from the
POR circuit
Rin2
VCMIN2 40
VGAINSEL
VCM
input
Rin1
VCMIN1 41
PARK
CIRCUITRY
+
33 AMPOUT
park
38 CLAMP
disable
32 PGND1
from the
spindel
36 VCM−
FOLLOWER
PREAMP
31 AMPIN+
brake
−
VCMref
30 AMPIN−
OPAMP
+
20 kΩ
39 VDDV
27 Ω
M
Rfb
100 nF
+12 v
23 kΩ
−
R
PREAMP
44 VCM+
FOLLOWER
R8
+
R*
48 PGND2
TDA5149G
50 kΩ
50
VCM
reference
input
VCMSENSOUT
46
−
VCMref
SENSE
Vref(o)
49
+
BUFFER
10 kΩ
43
10 kΩ
42
VCMSENSEL
27 Ω
VCMSENSEH
50 kΩ
+5 V
+12 V
REFERENCE
CURRENT
GENERATOR
Iref 17
+12 V
POR12ADJ 29
REFERENCE
VOLTAGE
GENERATOR
LATCH
CIRCUITRY
latch
LACTIVE LHOLD
from the
serial port
52
LATCHHOLD
−
COMP
+
37 TEMPMON
TEMPERATURE
SENSOR
to the
PARK
circuit
+5 V
+
POR5ADJ 28
53 LATCHACTIV
POWERON RESET
GENERATOR
COMP
−
26
PORDELAY
35
34
RESETA
RESETP
Fig.2 Block diagram of the VCM and RESET circuits.
1996 May 06
4
MGE656
100 nF
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
TDA5149G
PINNING
SYMBOL
PIN
I/O
DESCRIPTION
CAPY
1
I/O
charge pump capacitor
MOT0
2
I
motor centre tap input
H1
3
O
driver output to gate of upper power FET 1
MOT1
4
I
back EMF comparator input 1
L1
5
O
driver output to gate of lower power FET 1
H2
6
O
driver output to gate of upper power FET 2
MOT2
7
I
back EMF comparator input 2
L2
8
O
driver output to gate of lower power FET 2
H3
9
O
driver output to gate of upper power FET 3
MOT3
10
I
back EMF comparator input 3
L3
11
O
driver output to gate of lower power FET 3
IDRIVE
12
I
adjustment for output stage drive current
SPINSENSEH
13
I
positive spindle sense amplifier input
SPINSENSEL
14
I
negative spindle sense amplifier input
SISENS
15
O
spindle sense amplifier output
AGND
16
−
general analog ground; note 1
Iref
17
O
reference current generator output
SINTIN
18
I
negative integrator input
ISPIN
19
I
positive integrator input, average current adjustment
SICOMP
20
O
integrator output
RPOS
21
I
duty cycle modulator input
CSS1
22
I/O
soft switching capacitor 1
CSS2
23
I/O
soft switching capacitor 2
STOSC
24
I/O
sawtooth oscillator capacitor
SCANOUT
25
O
test output
PORDELAY
26
I/O
VDDA1
27
−
analog supply voltage 1 (+5 V)
POR5ADJ
28
O
adjustment of POR threshold (for +5 V)
POR12ADJ
29
O
adjustment of POR threshold (for +12 V)
AMPIN−
30
I
negative input of the uncommitted operational amplifier
AMPIN+
31
I
positive input of the uncommitted operational amplifier
PGND1
32
−
power ground 1 for VCM DMOS; note 1
AMPOUT
33
O
uncommitted operational amplifier output
RESETP
34
O
power-on reset digital output with passive pull-up resistor
RESETA
35
O
power-on reset digital output with active pull-up resistor
power-on reset delay capacitor (active LOW)
VCM−
36
O
negative output voltage of the VCM power stage
TEMPMON
37
O
temperature monitor output
CLAMP
38
I/O
clamp capacitor used for head retraction
VDDV
39
−
power supply for VCM DMOS driver (+12 V)
VCMIN2
40
I
switchable VCM control input voltage
1996 May 06
5
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
SYMBOL
TDA5149G
PIN
I/O
DESCRIPTION
VCMIN1
41
I
VCM control input voltage
VCMSENSEH
42
I
positive VCM sense amplifier input voltage
VCMSENSEL
43
I
negative VCM sense amplifier input voltage
VCM+
44
O
positive output voltage of the VCM power stage
H0
45
O
gate control of the isolating power FET
VCMref
46
I
reference voltage input for the VCM
BRAKEPOWER
47
I/O
PGND2
48
−
power ground 2 for VCM DMOS; note 1
Vref(o)
49
O
reference voltage generator output
VCMSENSOUT
50
O
VCM sense amplifier output voltage
BRAKEDELAY
51
I/O
powerless brake delay adjustment
LATCHHOLD
52
O
latch hold output
LATCHACTIV
53
O
latch activate output
VDD
54
−
general supply voltage (+12 V)
VDDD
55
−
digital supply voltage (+5 V)
SCANTEST
56
I
test mode input
FG
57
O
commutation frequency generator output
CLOCK
58
I
clock for digital timing input
SDATA
59
I
serial port data input
SCLOCK
60
I
serial port clock input
SENABLE
61
I
serial port enable input
CAPX2
62
I/O
charge pump capacitor input/output
CAPX1
63
I/O
charge pump capacitor input/output
DGND
64
−
reservoir capacitor for the brake/park circuitry
digital ground; note 1
Note
1. The 4 ground pins are tied to the lead frame for better heat dissipation.
1996 May 06
6
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
49 Vref(o)
50 VCMSENSOUT
51 BRAKEDELAY
52 LATCHHOLD
54 VDD
55 VDDD
56 SCANTEST
57 FG
58 CLOCK
59 SDATA
60 SCLOCK
61 SENABLE
62 CAPX2
63 CAPX1
64 DGND
handbook, full pagewidth
53 LATCHACTIV
TDA5149G
CAPY
1
48 PGND2
MOT0
2
47 BRAKEPOWER
H1
3
46 VCMref
MOT1
4
45 H0
L1
5
44 VCM+
H2
6
43 VCMSENSEL
MOT2
7
42 VCMSENSEH
L2
8
41 VCMIN1
TDA5149G
40 VCMIN2
35 RESETA
SISENS
15
34 RESETP
AGDN
16
33 AMPOUT
1996 May 06
7
PGND1
MGE654
AMPIN+
POR12ADJ
POR5ADJ
VDDA1
PORDELAY
SCANOUT
CSS2
CSS1
RPOS
SICOMP
Fig.3 Pin configuration.
32
14
31
SPINSENSEL
AMPIN− 30
36 VCM−
29
13
28
SPINSENSEH
27
37 TEMPMON
26
12
25
IDRIVE
STOSC 24
38 CLAMP
23
11
22
L3
21
39 VDDV
20
10
ISPIN 19
MOT3
SINTIN 18
9
Iref 17
H3
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
The different control modes of the TDA5149G can be
commanded via the serial bus. These modes are as
follows:
FUNCTIONAL DESCRIPTION
Spindle
• Sleep mode: all analog circuits, except the power supply
monitor, are switched off to reduce the power
consumption of both the 12 and 5 V supplies.
The spindle section contains both the low and high side
pre-drivers for a three phase DC brushless motor.
The digital commutation control, using the timing
information provided via the serial port, is responsible for
the proper switch-on and switch-off of the external power
FETs. It is also responsible for selecting the correct BEMF
comparator.
• Disable mode: the output voltage of all pre-drivers is
LOW thus the external power MOSFETs are not
conducting.
• Brake mode: all low side pre-drivers are turned on
(output voltage HIGH) thus switching on the low-side
power MOSFETs. In this way the back EMF voltage of
the motor is short-circuited to ground.
For optimum power efficiency, a continuous PWM method
is used to control the average current from the power
supply to the motor coils. This PWM mode, by controlling
the average power supply current, produces a lower
torque ripple and thus lower audible noise. In order to
reduce further acoustic noise the TDA5149G is provided
with a soft switching circuit to turn-on and turn-off linearly
the switching current under PWM control. The switching
transition time is controlled by the digital commutation
circuit and is fixed to 50% of the time between two
zero-crossings, i.e. 30° of the electrical revolution.
Voice coil motor
The VCM is a linear, symmetrical, class AB, H-bridge type
power amplifier with all power devices on-chip. The driver
is a transconductance amplifier that controls the output
currents up to 1.65 A. The driver is constructed in a
master-slave configuration with the zero current level
internally adjusted in such a way that it corresponds to the
middle of the output swing. Moreover, the gain of the slave
has been made greater than 1 in order to ensure full
saturation of the driver output VCM+.
Soft switching is achieved by activating, during
commutation, a free-running duty-cycle modulator
controlled by a linearly decreasing voltage across a
capacitor. This will reduce the current smoothly in the
off-going leg to zero. In conjunction with this additional
PWM open loop, the average current control regulates the
sum of the current in the off-going and on-going leg.
The gain of the closed loop is programmable, using the
VGAINSEL bit. This bit can be programmed via the serial
bus. A sense resistor (Rs) allows the measurement of the
VCM current. The voltage across this resistor is connected
to an accurate sense amplifier with a typical gain of 5.
The output of the sense amplifier (VCMSENSOUT) is fed back
to the input of the VCM amplifier. Because of the symmetry
of the circuit, the compensation network can be connected
between the VCM1 input and the VCM− output.
This method requires two PWM control loops; one to
control the average current (main loop) and one to control
the current in the off-going leg. The swapping of the two
loops is realized with a pair of analog switches that are
sequentially switched by the digital commutation circuitry.
The PWM control also causes PWM pulses on the back
EMF. These pulses disturb correct sensing of the back
EMF for the zero-crossing detection. Consequently,
edge-triggered latches are inserted behind the back EMF
comparators, thus ensuring reliable back EMF sensing.
Control modes such as VCM-BRAKE, VCM-DISABLE and
VCM-PARK can be controlled via the serial bus.
Latch drivers
The TDA5149G provides the possibility of driving an
external latch to secure the VCM heads. There are two
modes; the activate mode (LACTIVE) and the hold mode
(LHOLD). The hold mode is used to preserve power.
Both modes are controlled via the serial bus. The drivers
are switched off during the SLEEP mode or in the event of
a power-down.
In the SPINMODE, programmable via the serial bus, the
user can feed their own commutation pulses to the
pre-drivers and control the motor in the stepper-motor
mode. The commutation pulses are applied to the
TDA5149G via the serial bus by setting the COMMCLK bit
successively to logic 1 and logic 0.
1996 May 06
TDA5149G
8
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
To ensure that the stored energy in the clamp capacitor is
only used for the park operation, the CLAMP input must be
isolated from the power supply. This can be achieved by
using a Schottky diode or a reverse connected N-channel
power FET (see Fig.1). The TDA5149G provides an
output H0 to control this power FET.
Power-on/power-off reset
The power-on reset circuitry monitors the analog, digital
and general supplies. The voltage thresholds have been
set internally for both supplies, i.e. 4.4 V for VDDA and
VDDD, and 10.5 V for VDD. External adjustment and
filtering, to suppress supply spikes, has been made
possible through the pins POR5ADJ and POR12ADJ.
At power-down the brake delay circuit is also enabled.
The brake delay circuit is supplied by the energy stored in
the capacitor (charged during normal operation from VDD)
that is connected to the BRAKEPOWER pin. Both the
BRAKEDELAY and BRAKEPOWER pins are then isolated
from the 12 V supply voltage. When the voltage on the
BRAKEDELAY pin reaches a value of 1.6 V (typ.), the
low-side external power FETs are turned on to brake the
spindle motor. The BRAKEPOWER capacitor then
supplies the current to keep the power FETs conducting.
This means that the voltage on this capacitor decreases
with time.
When either of the supplies falls below their threshold
levels, the reset circuit provides two active LOW output
signals. The RESETA signal is a full CMOS output and the
RESETP signal has an active pull-down MOS transistor
with a passive pull-up resistance of 10 kΩ. The latter can
be used for emulation purposes. Both signals remain LOW
until the supply voltages are again above the threshold
level, delayed by a time constant period that is determined
by the value of the capacitor connected to pin PORDELAY.
A park sequence is initiated on a reset fault. This includes
disabling the actuator latch drivers and starting a delayed
spindle brake operation by switching on the low side
pre-drivers simultaneously. This brake delay is determined
by an external RC combination connected to
BRAKEDELAY. Actuator PARK and spindle BRAKE can
also be controlled via the serial port.
Serial port
The serial port is used to modify the various operational
modes of the TDA5149G and to adjust the timing
parameters to ensure the proper commutation sequence
of the spindle motor. It is a synchronous, slave only,
three-wire communication port with data (SDATA), clock
(SCLOCK) and enable (SENABLE) inputs.
At power-up, the two reset output signals (RESETA and
RESETP) will remain LOW as long as either supply
voltage is below the specified threshold plus the hysteresis
voltage. Once the supply voltages are above their specific
trip levels, the two reset signals become HIGH after the
power-on reset delay (PORDELAY). This delay time is
determined by the value of the capacitor connected to the
PORDELAY pin.
The serial port requires the data to be sent in bytes, the
LSB (data 0) to be sent first and the MSB (address 2) last.
The three most significant bits (MSBs) determine the
register address, the remaining five bits represent the
data, which means up to 8 registers can be independently
addressed.
When SENABLE is LOW, the serial port is disabled and
the IC is not affected by any change both on SDATA and
SCLOCK. When SENABLE is HIGH the data is written
serially to the shift register on the rising edge of SCLOCK.
When SENABLE goes LOW the shifting sequence is
stopped and the last 8 bits that are clocked in are latched
into the appropriate control register. Therefore, the
transmission of two consecutive bytes requires that
SENABLE is LOW for at least a duration of ‘t’
(see Chapter “Characteristics”).
Powerless park/brake
As with the normal retract procedure, an actuator park
sequence is initiated whenever a power-down situation
occurs. The power-on/power-off reset circuit generates the
two active LOW reset signals and also activates the VCM
park circuit. The VCM park circuit provides a voltage,
retrieved from the rectified back EMF voltage of the
running-out spindle, of 1.2 V (typ.) to the VCM pin.
The voltage at pin VCM+ is 0 V. This voltage is supplied by
the capacitor CCLAMP that is connected to the CLAMP pin.
This capacitor smooths the rectified back EMF and stores
the electrical energy generated by the motor.
1996 May 06
TDA5149G
9
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
handbook, full pagewidth
VCC
TDA5149G
MBH021
Vhys
threshold
0.8 V
t
POR
tC
tC
t
Fig.4 Power-on/power-off reset timing.
handbook, full pagewidth
SCLOCK
tsu1
th1
tpm
tsu1
SENABLE
tsu2
th2
tsu2
th2
SDATA
MGE655
Fig.5 Serial port signal timing
1996 May 06
10
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
Table 1
TDA5149G
Serial port registers
REGISTER
ADDRESSED
DATA4
DATA3
DATA2
DATA1
DATA0
Reg # 0
INIT
COMMCLCK
SPINMODE
SDISABLE
SBRAKE
Reg # 1
not used
HARD_SW
LHOLD
LACTIVATE
SLEEP
Reg # 2
not used
not used
VGAINSEL
VCM_CTRL_1
VCM_CTRL_0
Reg # 3
not used
not used
PRESCALER_2
PRESCALER_1
PRESCALER_0
Reg # 4
STARTUP_4
STARTUP_3
STARTUP_2
STARTUP_1
STARTUP_0
Reg # 5
WATCHDOG_4
WATCHDOG_3
WATCHDOG_2
WATCHDOG_1
WATCHDOG_0
Reg # 6
not used
not used
COMDELIM_2
COMDELIM_1
COMDELIM_0
Reg # 7
BLANK_4
BLANK_3
BLANK_2
BLANK_1
BLANK_0
Table 2
REG # 0: address 000; DATA = | INIT | COMMCLK | SPINMODE | SDISABLE | SBRAKE |
DATA BIT
RESET
STATE
DESCRIPTION
INIT
1
initializes the three bits commutation shift register in state 1 (see Table 13)
COMMCLK
0
commutation clock in stepper mode (one commutation every LOW-to-HIGH transition)
SPINMODE
0
stepper/BEMF detection mode selection. SPINMODE = 1 means stepper motor mode
in hard-switching configuration
SDISABLE
1
logic 1 sets the pre-drivers outputs LOW so that the spindle motor coils are in the
high-impedance state
SBRAKE
0
logic 1 sets the lower pre-driver outputs HIGH and the upper pre-driver outputs LOW
so that the spindle motor coils are shorted to ground
Table 3
REG # 1: address 001; | not used | HARD_SW | LHOLD | LACTIVE | SLEEP |
DATA BIT
RESET
STATE
DESCRIPTION
HARD_SW
0
logic 1 disables the soft switching circuitry, which means PWM is applied on the lower
FETs only.This mode is also forced in stepper motor mode.
LHOLD
0
logic 1 turns on the hold current supplied by VDDD through the latch. It is ignored if
LACTIVE = 1
LACTIVE
0
logic 1 turns on the activate current supplied by VDD through the latch
SLEEP
0
logic 1 disables spindle, VCM and latch driver outputs. The whole analog circuitry is
turned off except the reference bandgap and the voltage monitors. The uncommitted
operational amplifier is also cut off.
Table 4
REG # 2: address 010; | not used | not used | VGAINSEL | VCM_CTRL_1 | VCM_CTRL_0 |
DATA BIT
RESET
STATE
DESCRIPTION
VGAINSEL
1
logic 1 turns on the switch between VCMIN1 and VCMIN2, resulting in a higher gain for the
transconductance of the VCM closed loop
VCM_CTRL_1
1
see Table 5
VCM_CTRL_0
1
see Table 5
1996 May 06
11
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
Table 5
Table 6
TDA5149G
Operating conditions for VCM_CTRL_1 and VCM_CTRL_0
VCM_CTRL_1
VCM_CTRL_0
MODE
0
0
VCM operating
0
1
VCM brake
1
0
VCM park
1
1
VCM disable
REG # 3: address 011; | not used | not used | PRESCALER_REG [2 to 0]
DATA BIT
RESET
STATE
PRESCALER_2
0
PRESCALER_1
1
PRESCALER_0
0
DESCRIPTION(1)
sets the division factor that is applied to the external clock (pin 58) in order to
obtain the appropriate internal clock frequency for the proper determination of the
commutation delays. The prescaling factors can be obtained as shown in Table 7
Note
1. CLOCK (pin 58) must be valid before the end of the POR delay.
Table 7
Prescaler factors
PRESCALER_REG
FREQUENCY (MHz)(1)
000
1
001
2
010
4
011
8
100
16
101
32
110
64
111
128
Note
1. Internal clock frequency is equal to external clock frequency divided by prescaler ratio.
Table 8
REG # 4: address 100; | STARTUP_REG[4 to 0] |
DATA BIT
RESET
STATE
STARTUP_4
0
STARTUP_3
0
STARTUP_2
0
STARTUP_1
0
STARTUP_0
0
1996 May 06
DESCRIPTION
The start-up timer instigates the spin-up in the absence of the back EMF zero
crossings. If the rotational speed is high enough, the commutations are
sequenced regardless of the start-up counter. But if no BEMF zero crossing
occurs, which is the case if the motor is stationary or rotating very slowly, the
start-up timer reaches its terminal count given by the STARTUP_REG, thereby
causing the next commutation. If tIC is the period of the internal clock then;
STARTUP delay = [(({0 to 31} × 32) + 2) × 511) + 2] × tIC
12
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
Table 9
TDA5149G
REG # 4: address 101; | WATCHDOG_REG[4 to 0] |
DATA BIT
RESET
STATE
WATCHDOG_4
0
WATCHDOG_3
0
WATCHDOG_2
0
WATCHDOG_1
0
WATCHDOG_0
0
DESCRIPTION
The watchdog timer checks for correct back EMF polarity, which indicates correct
rotation of the motor
WATCHDOG delay = [ ( { 0 to 31 } × 64 ) + 1 ] × t IC
Table 10 REG # 6: address 110; | not used | not used | COMDELIM_REG[2 to 0] |
RESET
STATE
DATA BIT
COMDELIM_2
0
COMDELIM_1
0
COMDELIM_0
0
DESCRIPTION
Defines the maximum commutation delay limit by setting the saturation value of the
zero crossing counter. tIC represents the period of the internal clock. Table 11
shows the delays which can be obtained.
Table 11 Commutation delay limit
COMDELIM_REG
COUNTER SATURATION VALUE
MAXIMUM COMMUTATION DELAY
111
2047
tIC × 1023
110; note 1
1535
tIC × 767
101
1023
tIC × 511
100; note 1
767
tIC × 383
011
511
tIC × 255
010; note 1
383
tIC × 191
001
255
tIC × 127
000; note 1
191
tIC × 95
Note
1. Even COMDELIM _REG values must be avoided.
Table 12 REG # 7: address 111; | BLANK_REG[4 to 0] |
DATA BIT
RESET
STATE
BLANK_4
0
BLANK_3
0
BLANK_2
0
BLANK_1
0
BLANK_0
0
1996 May 06
DESCRIPTION
In the hard switching mode, the blank delay inhibits the back EMF comparator
outputs just at the moment the MOT outputs are commutating, until they have been
stabilized again. To avoid false zero-crossing detection, the blank delay operates in
the same way at the end of the fly-back pulse (hard-switching mode), or at the end
of the soft-switching interval (soft-switching mode).
BLANK delay = [ ( { 0 to 31 } × 4 ) + 1 ] × t IC
13
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
TDA5149G
Table 13 Configuration of the six commutation states in hard-switching mode
STATE
SHIFT REGISTER
H1(1)
H2(1)
H3(1)
L1(2)
L2(2)
L3(2)
1(3)
111
ON
−
−
−
PWM
−
2
011
ON
−
−
−
−
PWM
3
001
−
ON
−
−
−
PWM
4
000
−
ON
−
PWM
−
−
5
100
−
−
ON
PWM
−
−
6
110
−
−
ON
−
PWM
−
Note
1. H1, H2 and H3 are the upper power FETs connected to MOT1, MOT2 and MOT3 respectively.
2. L1, L2 and L3 are the lower power FETs connected to MOT1, MOT2 and MOT3 respectively.
3. INIT = 1 means ‘state 1’ situation with PWM stuck in OFF on L2.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
VDD
PARAMETER
general supply voltage
CONDITIONS
indefinite time period
VDDD
digital supply voltage
indefinite time period
VDDA
analog supply voltage
indefinite time period
VDDV
supply for VCM DMOS driver
indefinite time period
MIN.
MAX.
UNIT
−0.3
+13.5
V
−0.3
+15
V
−0.3
+6.0
V
−0.3
+7.0
V
−0.3
+6.0
V
−0.3
+7.0
V
−0.3
+13.5
V
−0.3
+15
V
VCM+
output voltage of the VCM power
stage
−0.7
+15
V
VCM−
output voltage of the VCM power
stage
−0.7
+15
V
ICM+
output current of the VCM power
stage
current peak <0.5 s
−
2.5
A
ICM−
output current of the VCM power
stage
current peak <0.5 s
−
2.5
A
VMOT
BEMF comparator input voltage
(pins 4, 7 and 10)
−0.7
−
V
Vn
input voltages on other pins
−0.3
−
V
Tstg
IC storage temperature
−55
+125
°C
Tj(max)
maximum junction temperature
−
150
°C
1996 May 06
14
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
TDA5149G
HANDLING
Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be totally safe, it is
desirable to take normal precautions appropriate to handling MOS devices.
ESD according to MIL STD 883C - method 3015 (HBM 1500 Ω, 100 pF) 3 pulses positive and 3 pulses negative on each
pin versus ground - Class 1: 0 to 1999 V.
THERMAL CHARACTERISTICS
PARAMETER(1)
SYMBOL
Rth j-a
VALUE
UNIT
54
K/W
thermal resistance from junction to ambient in free air
Note
1. This is obtained in a standard PCB: standard PCB size: 100 mm × 75 mm × 1.6 mm; material = glass epoxy FR4,
single copper layer. With dedicated PCB tailored to heat dissipation, the thermal resistance could be as low as
40 K/W.
OPERATING CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Temperature
Tamb
operating ambient temperature
−5
−
+70
°C
Supplies: pins 27, 55, 54 and 39
VDDA
analog supply voltage
4.5
5.0
5.5
V
VDDD
digital supply voltage
4.5
5.0
5.5
V
IDD
general supply voltage
10.8
12.0
13.2
V
IDDA
analog supply current
−
5.5
7.5
mA
VDDV
supply voltage for VCM DMOS
driver
10.8
12.0
13.2
V
1.9
−
4.0
V
normal mode
VCM reference voltage: pin 46 (VCMref)
VCMref
reference voltage input level
Charge pump: pin 1 (CAPY)
CCAPX
charge pump capacitor
between CAPX1 and CAPX2
6.8
10
13
nF
CCAPY
charge pump capacitor
between CAPY and ground
16
22
30
nF
between CLAMP and ground
−
47
−
µF
note 1
−
47
−
µF
CLAMP: pin 38
CCLAMP
clamp capacitance
BRAKEPOWER: pin 47
CBP
brakepower capacitance
Sense resistors
RSSENS
spindle sense resistor
0.15
−
−
Ω
RVSENS
VCM sense resistor
0.15
−
−
Ω
1996 May 06
15
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
SYMBOL
PARAMETER
TDA5149G
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Spindle pre-drivers: pin 12 (IDRIVE)
RIDRIVE
32
−
470
kΩ
47
−
470
kΩ
note 2
150
−
700
pF
note 3
−
100
−
nF
resistance for pre-driver current
adjustment
Reference current: pin 17 (Iref)
RIref
resistance for reference current
adjustment
Sawtooth oscillator: pin 24 (STOSC)
CSO
sawtooth oscillator capacitance
Power-on reset: pin 26 (PORDELAY)
CPORDELAY
PORDELAY capacitance
Digital inputs for the serial port: pins 58 to 61 (CLOCK, SDATA, SCLOCK and SENABLE)
VIH
HIGH level input voltage
2.4
−
−
V
VIL
LOW level input voltage
−
−
0.8
V
Notes
1. To guarantee a powerless brake duration of at least 10 s. A low leakage capacitor must be used (<0.1 µA).
2. For a frequency range of 25 to 100 kHz. CSTOSC = 0.775 (Iref/fPWM).
3. For a RESETA/RESETP pulse duration of approximately 100 ms.
CHARACTERISTICS
VDD = 12 V; VDDA = VDDD = 5 V; Tamb = 25 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supplies: pins 27, 55 and 54
IDDA
analog supply current
normal mode
−
5.5
7.5
mA
sleep mode
−
1.6
2.0
mA
IDDD
digital supply current
normal mode
−
5.5
7.5
mA
sleep mode
−
1.6
2.0
mA
normal mode
−
12
17
mA
sleep mode
−
2.9
4.0
mA
Iref(o) = ±1 mA
2.47
2.57
2.67
V
Rref = 120 kΩ; note 1
20.6
21.4
22.2
µA
IDD
general supply current
VOLTAGE REFERENCE: PIN 49 (Vref(o))
Vref(o)
reference voltage generator
output
CURRENT REFERENCE: PIN 17 (Iref(o))
Iref(o)
reference current generator
output
TEMPERATURE MONITOR: PIN 37 (TEMPMON)
VOLT
output voltage at LOW
temperature
Tj = 25 °C
2.15
2.17
2.19
V
VOHT
output voltage at HIGH
temperature
Tj = 150 °C; note 2
3.03
3.055
3.08
V
1996 May 06
16
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
SYMBOL
PARAMETER
TDA5149G
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VCM REFERENCE: PIN 46 (VCMref)
Ii
input current
VVCMref = 2 V; note 3
−250
−
+60
µA
Spindle: pre-drivers
CHARGE PUMP: PIN 1 (CAPY)
VCP
charge pump DC voltage
ICAPY < 1 mA
18.5
19.3
19.8
V
Vripple(p-p)
voltage ripple
(peak-to-peak value)
ICAPY = 1 mA
−
−
0.8
V
BACK EMF COMPARATORS: PINS 2, 4, 7 AND 10 (MOT0, MOT1, MOT2 AND MOT3)
note 4
−0.7
−
VDD + 0.7
V
input bias current
MOT0
−10
−
0
µA
switching level for hysteresis
for negative transition
with respect to MOT0
−13
−
−7
mV
for positive transition
with respect to MOT0
7
−
13
mV
ViCM
common mode input voltage
Ibias
VSWhys
∆VCSW
variation in comparator
switching levels for one IC
−4.2
−
+4.2
mV
Vi(hys)
input voltage hysteresis
−
0.5
−
mV
7.2
8.0
8.8
V
−0.7
−0.5
mA
SPINDLE LOWER PRE-DRIVERS: PINS 5, 8 AND 11 (L1, L2 AND L3)
VOH
HIGH level output voltage
IOH = −0.5 mA
Isource
output source current
RIDRIVE = 120 kΩ; note 5 −0.9
Isink
output sink current
SR
slew rate
1.2
RIDRIVE = 120 kΩ; note 6 −
1.6
2.0
mA
10
−
V/µs
SPINDLE UPPER PRE-DRIVERS: PINS 3, 6 AND 9 (H1, H2 AND H3)
VOH
HIGH level output voltage
IOH = −0.5 mA
18.0
18.8
19.6
V
Isource
output source current
RIDRIVE = 120 kΩ; note 7 −1.3
−1.0
−0.7
mA
Isink
output sink current
1.75
2.2
mA
SR
slew rate
RIDRIVE = 120 kΩ; note 6 −
10
−
V/µs
output voltage
normal condition
18.3
18.8
20
V
RIDRIVE = 120 kΩ; note 7 20.6
21.4
22.2
µA
1.3
H0: PIN 45
Vo
OUTPUT CURRENT ADJUSTMENT: PIN 12 (IDRIVE)
IrefSP
spindle pre-driver reference
current
Spindle: PWM
SPINDLE SENSE AMPLIFIER: PINS 13 AND 14 (SPINSENSEH AND SPINSENSEL)
∆Vi
differential input voltage
0
−
1.84
V
Isense+
positive input sense current
−60
−51
−42
µA
1996 May 06
17
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
SYMBOL
PARAMETER
TDA5149G
CONDITIONS
MIN.
TYP.
MAX.
UNIT
SISENS: PIN 15
∆Vo
output voltage shift
1.38
1.43
1.48
V
Vo
output voltage level
1.37
−
VDD − 1.2
V
GS
spindle sense amplifier gain
4.85
5.0
5.15
V/V
fUG
unity gain bandwidth
1
−
−
MHz
SPINDLE CURRENT LOOP FILTER AMPLIFIER: PINS 18 AND 19 (SINTIN AND ISPIN)
ViCM
common mode input voltage
1.3
−
3.2
V
Vi(os)
input offset voltage
−3.0
−
+3.0
mV
Ii
input current
−1
−
0
µA
−
−
0.5
V
SICOMP: PIN 20
VOL
LOW level output voltage
IOL = 1 mA
VOH
HIGH level output voltage
IOH = −0.6 mA
3.5
−
−
V
SR
slew rate
0.5
0.9
1.5
V/µs
fUG
unity gain bandwidth
1
−
−
MHz
SPINDLE PWM COMPARATORS: PINS 22 AND 23 (CSS1 AND CSS2)
Vdc
discharge clamp voltage
ICSS1,2 = 0.5 mA
−
−
0.45
V
Isink(d)
sink current
for normal CSS1 and
CSS2 discharge;
RIref = 120 kΩ
20.2
21.0
21.8
µA
Isink(s)
sink current
for CSS1 and CSS2
short
1
−
−
mA
ANALOG SWITCHES: PIN 21 (RPOS)
RSon
switch-on resistance
150
250
400
Ω
RSoff
switch-off resistance
10
−
−
MΩ
SAWTOOTH OSCILLATOR: PIN 24 (STOSC)
VSUL
voltage swing upper limit
2.9
3.0
3.1
V
VSLL
voltage swing lower limit
static test
0.53
0.55
0.57
V
Isource
source current
note 8
−44.4
−42.8
−41.2
µA
Isink
sink current
note 9
500
800
1100
µA
Voice coil motor driver
VCM PREAMPLIFIERS: PINS 41 AND 40 (VCMIN1 AND VCMIN2)
Ii
input current
−10
−
+10
µA
Vi(os)
input offset voltage
−6
−
+6
mV
fUG
unity gain bandwidth
−
3
−
MHz
GRSon
gain switch-on resistance
VGAINSEL = 1
−
−
60
Ω
GRSoff
gain switch-off resistance
VGAINSEL = 0
10
−
−
MΩ
1996 May 06
18
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
SYMBOL
PARAMETER
TDA5149G
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VCM DRIVER AMPLIFIERS: PINS 44 AND 36 (VCM+ AND VCM−)
tCOD
cross-over switch time
−
2
5
µs
GvSD
slave driver voltage gain
1.12
1.15
1.18
V/V
VOD
output drop voltage
including bond wires and
leads
Io = 1 A; Tj = 25 °C
−
−
0.65
V
Io = 0.2 A
−
−
0.45
V
Io = 1 A; Tj = 150 °C
−
−
1.1
V
tRFS
recovery time from saturation
−
−
100
µs
SR
output slew rate
1.4
2.0
−
V/µs
fUG
unity gain bandwidth
1.5
3
−
MHz
Vpark
park voltage
0.9
1.2
1.4
V
−0.7
−
VDD + 0.7
V
−60
−
+250
µA
−
0.5
V
VDD − 1.5
−
−
V
4.85
5.0
5.15
V/V
−
1
−
MHz
−23
−
+23
mV
−
−
−50
dB
over full temperature
range
VCM SENSE AMPLIFIER: PINS 43 AND 42 (VCMSENSEL AND VCMSENSEH)
VI
input voltage range
II
input current
common mode from
0 to 12 V
VCMSENSOUT: PIN 50
VOSL
LOW level output saturation
voltage
IOL = 0.4 mA
VOSH
HIGH level output saturation
voltage
IOH = −0.4 mA
Gs
sense amplifier gain
fUG
unity gain bandwidth
Vo(os)
output offset voltage
GCM
common mode gain
VCMSENSEH = 6 V;
VCMSENSEL = 6 V
Latch drivers
LATCHACTIV: PIN 53
Isource
output source current
over full temperature
range
−0.5
−
−
A
RDSon
FET switch-on resistance
Tj = 25 °C;
Isource = −0.5 A
−
−
1.2
Ω
∆RDSon/T
FET switch-on resistance
temperature variation
−
6.4
−
mΩ/°C
−0.1
−
−
A
−
750
775
mV
−
−2
−
mV/°C
−
8
12
Ω
−
40
−
mΩ/°C
LATCHHOLD: PIN 52
Isource
output source current
VDO
diode drop voltage
∆VDO
diode drop voltage
temperature variation
Ron
total on-resistance
∆Ron
total on-resistance
temperature variation
1996 May 06
Tj = 25 °C, ID = 1 mA
Tj = 25 °C
19
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
SYMBOL
PARAMETER
TDA5149G
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Uncommitted operational amplifier
AMPIN− AND AMPIN+: PINS 30 AND 31
Vi(os)
input offset voltage
−3.5
−
+3.5
mV
Ii(bias)
input bias current
−1
−
0
µA
VCM
common mode voltage
0
−
VDD − 1.6
V
−
67
−
dB
−
1.5
−
MHz
60
−
−
dB
AMPOUT: PIN 33
GOL
open loop gain
fco
cross-over frequency
PSRR
power supply rejection ratio
CL = 10 pF
VOH
HIGH level output voltage
IOH = −0.5 mA
VDDD + 0.3
−
−
V
VOL
LOW level output voltage
IOL = 0.5 mA
−
−
0.3
V
SR
slew rate
−
1.0
−
V/µS
Brake delay
BRAKEPOWER: PIN 47
VNM
normal mode voltage
Isink
input sink current
−
−
V
prior to automatic brake; −
VBRAKEPOWER = 9 V
VDD − 0.85
35
50
µA
−
0.6
2
µA
5.0
−
−
V
−
−
0.8
V
while braking; over full
temperature range;
VBRAKEPOWER = 6.5 V
VBV
brakepower voltage for
proper brake operation
VD
drop voltage between brake
power and L1, L2 and L3
VBRAKEPOWER = 6.5 V
BRAKEDELAY: PIN 51
VNM
normal mode voltage
VDD − 0.85
−
−
V
Vtrip
trip level voltage for automatic over full temperature
brake
range; note 10
1.4
1.7
2.0
V
ILI
leakage current
−200
−
+200
nA
1996 May 06
over full temperature
range
20
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
SYMBOL
PARAMETER
TDA5149G
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Power-on/power-off reset
UNDER THRESHOLD COMPARATORS: PINS 29 AND 28 (POR12ADJ AND POR5ADJ)
VPORTH5
5 V threshold voltage for
power-on/power-off detection
4.30
4.37
4.50
V
VDDDhys
hysteresis on VDDD
comparator
30
55
80
mV
VPORTH12
12 V threshold voltage for
power-on/power-off detection
10.25
10.4
10.75
V
VDDhys
hysteresis on VDD comparator
60
95
130
mV
RPOR5low
POR5ADJ lower resistance
∆RPOR5low
POR5ADJ lower resistance
temperature variation
RRup/Rlo
POR5ADJ resistance ratio
RPOR12low
POR12ADJ lower resistance
∆RPOR12low
POR12ADJ lower resistance
temperature variation
RRup/Rlo
POR12ADJ resistance ratio
Tj = 25 °C
Ω
25340
28800 32260
−
66
−
Ω/°C
over full temperature
range
0.715
0.725
0.735
−
Tj = 25 °C
10560
12000 13440
−
27
−
Ω/°C
3.07
3.11
3.15
−
−2.4
−2.2
−1.8
µA
2.51
2.57
2.63
V
−
−
0.4
V
over full temperature
range
Ω
POWER-ON/POWER-OFF DELAY GENERATOR: PIN 26 (PORDELAY)
Isource
source current
VHT
RESET output threshold
voltage
VLT
LOW threshold voltage
note 11
RESETP: PIN 34
VOL
LOW level output voltage
IOL = 3 mA
−
−
0.4
V
Rpu
pull up resistor
over full temperature
range
6
10
14
kΩ
VDDD − 0.7
−
−
V
−
0.4
V
RESETA: PIN 35
VOH
HIGH level output voltage
IOH = −1.5 mA
VOL
LOW level output voltage
IOL = 3 mA
Digital control
CLOCK: PIN 58
fclk
clock frequency
−
−
12
MHz
δ
duty factor
40
50
60
%
FG: PIN 57
VOH
HIGH level output voltage
IOH = −0.15 mA
VDDD − 0.7
−
−
V
VOL
LOW level output voltage
IOL = 0.10 mA
−
−
0.4
V
1996 May 06
21
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
SYMBOL
PARAMETER
TDA5149G
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Serial port
SENABLE: PIN 61
tsu
set-up time
th
hold time
tpm
time between 2 serial port
commands
with respect to the rising 46
edge
−
−
ns
19
−
−
ns
2tIC
−
−
µs
with respect to the rising 22
edge
−
−
ns
20
−
−
ns
tIC = internal clock
cycle; note 12
SDATA: PIN 59
tsu
set-up time
th
hold time
SCLOCK: PIN 60
fSCL
clock frequency
−
−
10
MHz
δ
duty factor
30
50
70
%
Notes
1.
V ref ( o )
I ref = ----------------R Iref
2. Corresponds to an averaged variation of 7 mV/°C.
3. Including the VCMSENSE amplifier input current.
4. Extended voltages are allowed if series resistors are used (see Fig.1).
5. The gain between the pre-driver output current and the IDRIVE current is typically; lower source = 35,
upper source = 50, lower sink = 75 and upper sink = 80.
6. Typical value for external FET such as PHN210.
V ref ( o )
7. I I SPREF = -------------------R IDRIVE
V ref ( o )
8. I I source = 2 × -----------------R Iref
9. Valid if the STOSC capacitance is in the nominal range of 150 to 700 pF.
10. tBRAKEDELAY ≈ 2RC.
11. tPORDELAY ≈ CPORDELAY, with CPORDELAY in µF.
12. Master clock (pin 58) must be running (1 cycle = Tec) − tIC = Tecx (prescaler ratio).
1996 May 06
22
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
TDA5149G
PACKAGE OUTLINE
LQFP64: plastic low profile quad flat package; 64 leads; body 10 x 10 x 1.4 mm
SOT314-2
c
y
X
A
48
33
49
32
ZE
e
Q
E HE
A
A2
(A 3)
A1
wM
θ
bp
pin 1 index
64
Lp
L
17
1
detail X
16
ZD
e
v M A
wM
bp
D
B
HD
v M B
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
mm
1.60
0.20
0.05
1.45
1.35
0.25
0.27
0.17
0.18
0.12
10.1
9.9
10.1
9.9
0.5
HD
HE
12.15 12.15
11.85 11.85
L
Lp
Q
v
w
y
1.0
0.75
0.45
0.69
0.59
0.2
0.12
0.1
Z D (1) Z E (1)
1.45
1.05
1.45
1.05
θ
7o
0o
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
EIAJ
ISSUE DATE
94-01-07
95-12-19
SOT314-2
1996 May 06
EUROPEAN
PROJECTION
23
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
If wave soldering cannot be avoided, the following
conditions must be observed:
SOLDERING
Introduction
• A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave)
soldering technique should be used.
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
• The footprint must be at an angle of 45° to the board
direction and must incorporate solder thieves
downstream and at the side corners.
Even with these conditions, do not consider wave
soldering LQFP packages LQFP48 (SOT313-2),
LQFP64 (SOT314-2) or LQFP80 (SOT315-1).
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our “IC Package Databook” (order code 9398 652 90011).
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Reflow soldering
Reflow soldering techniques are suitable for all LQFP
packages.
Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150 °C within
6 seconds. Typical dwell time is 4 seconds at 250 °C.
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250 °C.
Repairing soldered joints
Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300 °C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320 °C.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.
Wave soldering
Wave soldering is not recommended for LQFP packages.
This is because of the likelihood of solder bridging due to
closely-spaced leads and the possibility of incomplete
solder penetration in multi-lead devices.
1996 May 06
TDA5149G
24
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
TDA5149G
DEFINITIONS
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
1996 May 06
25
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
NOTES
1996 May 06
26
TDA5149G
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
NOTES
1996 May 06
27
TDA5149G
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SCDS48
© Philips Electronics N.V. 1996
All rights are reserved. Reproduction in whole or in part is prohibited without the
prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation
or contract, is believed to be accurate and reliable and may be changed without
notice. No liability will be accepted by the publisher for any consequence of its
use. Publication thereof does not convey nor imply any license under patent- or
other industrial or intellectual property rights.
Printed in The Netherlands
397021/1200/01/pp28
Document order number:
Date of release: 1996 May 06
9397 750 00823