TDA5149G Philips Semiconductors, TDA5149G Datasheet - Page 11

• Manufacturer Part Number: TDA5149G
• Description: 12 V Voice Coil Motor VCM driver and spindle motor pre-driver combination chip
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Table 1 Serial port registers
Table 2 REG # 0: address 000; DATA = | INIT | COMMCLK | SPINMODE | SDISABLE | SBRAKE |
Table 3 REG # 1: address 001; | not used | HARD_SW | LHOLD | LACTIVE | SLEEP |
Table 4 REG # 2: address 010; | not used | not used | VGAINSEL | VCM_CTRL_1 | VCM_CTRL_0 |
1996 May 06
INIT
COMMCLK
SPINMODE
SDISABLE
SBRAKE
HARD_SW
LHOLD
LACTIVE
SLEEP
VGAINSEL
VCM_CTRL_1
VCM_CTRL_0
ADDRESSED
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
REGISTER
DATA BIT
DATA BIT
DATA BIT
Reg # 0
Reg # 1
Reg # 2
Reg # 3
Reg # 4
Reg # 5
Reg # 6
Reg # 7
WATCHDOG_4
RESET
RESET
RESET
STATE
STATE
STATE
STARTUP_4
BLANK_4
not used
not used
not used
not used
1
0
0
1
0
0
0
0
0
1
1
1
DATA4
INIT
initializes the three bits commutation shift register in state 1 (see Table 13)
commutation clock in stepper mode (one commutation every LOW-to-HIGH transition)
stepper/BEMF detection mode selection. SPINMODE = 1 means stepper motor mode
in hard-switching configuration
logic 1 sets the pre-drivers outputs LOW so that the spindle motor coils are in the
high-impedance state
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
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.
logic 1 turns on the hold current supplied by V
LACTIVE = 1
logic 1 turns on the activate current supplied by V
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.
logic 1 turns on the switch between V
transconductance of the VCM closed loop
see Table 5
see Table 5
WATCHDOG_3
COMMCLCK
STARTUP_3
HARD_SW
BLANK_3
not used
not used
not used
DATA3
11
PRESCALER_2
WATCHDOG_2
COMDELIM_2
STARTUP_2
SPINMODE
VGAINSEL
BLANK_2
LHOLD
DATA2
DESCRIPTION
DESCRIPTION
DESCRIPTION
CMIN1
and V
DDD
PRESCALER_1
CMIN2
WATCHDOG_1
VCM_CTRL_1
COMDELIM_1
DD
STARTUP_1
through the latch. It is ignored if
LACTIVATE
SDISABLE
BLANK_1
through the latch
DATA1
, resulting in a higher gain for the
Product specification
TDA5149G
PRESCALER_0
WATCHDOG_0
VCM_CTRL_0
COMDELIM_0
STARTUP_0
BLANK_0
SBRAKE
DATA0
SLEEP