TDA5149G Datasheet, PDF (11/28 Pages) NXP Semiconductors – 12 V Voice Coil Motor VCM driver and spindle motor pre-driver combination chip

Philips Semiconductors
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
Product specification
TDA5149G
Table 1 Serial port registers
REGISTER
ADDRESSED
Reg # 0
Reg # 1
Reg # 2
Reg # 3
Reg # 4
Reg # 5
Reg # 6
Reg # 7
DATA4
INIT
not used
not used
not used
STARTUP_4
WATCHDOG_4
not used
BLANK_4
DATA3
COMMCLCK
HARD_SW
not used
not used
STARTUP_3
WATCHDOG_3
not used
BLANK_3
DATA2
SPINMODE
LHOLD
VGAINSEL
PRESCALER_2
STARTUP_2
WATCHDOG_2
COMDELIM_2
BLANK_2
DATA1
SDISABLE
LACTIVATE
VCM_CTRL_1
PRESCALER_1
STARTUP_1
WATCHDOG_1
COMDELIM_1
BLANK_1
DATA0
SBRAKE
SLEEP
VCM_CTRL_0
PRESCALER_0
STARTUP_0
WATCHDOG_0
COMDELIM_0
BLANK_0
Table 2 REG # 0: address 000; DATA = | INIT | COMMCLK | SPINMODE | SDISABLE | SBRAKE |
DATA BIT
INIT
COMMCLK
SPINMODE
SDISABLE
SBRAKE
RESET
STATE
1
0
0
1
0
DESCRIPTION
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
Table 3 REG # 1: address 001; | not used | HARD_SW | LHOLD | LACTIVE | SLEEP |
DATA BIT
HARD_SW
LHOLD
LACTIVE
SLEEP
RESET
STATE
0
0
0
0
DESCRIPTION
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_DDD through the latch. It is ignored if
LACTIVE = 1
logic 1 turns on the activate current supplied by V_DD through the latch
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
VGAINSEL
VCM_CTRL_1
VCM_CTRL_0
RESET
STATE
1
1
1
DESCRIPTION
logic 1 turns on the switch between V_CMIN1 and V_CMIN2, resulting in a higher gain for the
transconductance of the VCM closed loop
see Table 5
see Table 5
1996 May 06
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