參數(shù)資料
型號： TDA5147CH
廠商： NXP SEMICONDUCTORS
元件分類： 運動控制電子
英文描述： 12 V Voice Coil Motor VCM driver and spindle motor drive combination chip
中文描述： DISK DRIVE MOTOR CONTROLLER, PQFP64
文件頁數(shù)： 9/32頁
文件大?。?/td> 196K
代理商： TDA5147CH
1997 Jul 09
9
Philips Semiconductors
Preliminary specification
12 V Voice Coil Motor (VCM) driver and
spindle motor drive combination chip
TDA5147CH
Table 1
Input decoder truth table for spindle motor drivers
Note
1.
x = high impedance.
CONDITION
SCNTL1
SCNTL2
SCNTL3
SDRVU
(1)
SDRVV
(1)
SDRVW
(1)
Disable
Dynamic brake
State 1
State 2
State 3
State 4
State 5
State 6
Under voltage
LOW
HIGH
HIGH
HIGH
HIGH
LOW
LOW
LOW
LOW
HIGH
HIGH
LOW
LOW
LOW
HIGH
HIGH
LOW
HIGH
LOW
LOW
HIGH
HIGH
HIGH
LOW
x
x
x
HIGH
LOW
x
HIGH
HIGH
x
LOW
x
HIGH
x
LOW
LOW
x
HIGH
HIGH
x
HIGH
HIGH
HIGH
x
LOW
LOW
x
x
VCM driver
The VCM driver (see Fig.1) is a linear, class AB, H-bridge
type power driver with all power devices internal to the IC.
In addition to the power stage a sense resistor enables the
VCM current to be measured. The VCM current is
controlled (see Fig.5) via two PWM signals, V
IPWMH
and
V
IPWML
, that are generated by the digital circuit. The signal
at pin V
IPWMH
weights 32 times more than the signal at
pin V
IPWML
, thus the current is proportional to the duty
factor of (V
IPWML
+ 32
×
V
IPWMH
). These PWM signals are
filtered by using an internal 3rd-order low-pass filter
(Butterworth filter).The bandwidth of this low-pass filter is
nominally 40 kHz (less than 2 degrees lag at 500 Hz), but
the real pole may be adjusted by an external capacitor
connected to pin V
FLTINP
. The filter output (pin V
FLTOUT
)
depends on the duty factor of the PWM signals only.
A 3-level mode line (V
PCNTL
) has been included that will:
Enable VCM drivers; V
PCNTL
= V
CC5
(normal)
Disable VCM drivers; V
PCNTL
= 0.5V
CC5
or high
impedance
Park (soft retract the actuator); V
PCNTL
= 0 V.
See Table 2 for the truth table of the VCM driver modes.
Table 2
V
PCNTL
and SCNTL modes
Note
1.
X = don't care.
MODES OF OPERATION AT
POWER GOOD (PORN = HIGH)
V
PCNTL
INPUT STATE
(1)
SCNTL INPUT STATES
(1)
SCNTL1
SCNTL2
SCNTL3
VCM enable
VCM disable
Park
Spindle enable
Spindle disable
Spindle brake
Spindle mode
V
CC5
X
X
X
X
X
X
X
X
X
0.5V
CC5
or high impedance
0 V
X
X
X
0.5V
CC5
or high impedance
see Table 3
LOW
HIGH
LOW
see Table 3
LOW
HIGH
LOW
see Table 3
LOW
HIGH
LOW
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