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PDF TA8490F Data sheet ( Hoja de datos )
| Número de pieza | TA8490F | |
| Descripción | 3-PHASE FULL WAVE BRUSHLESS DC MOTOR DRIVER IC FOR CD-ROM DRIVES | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT MULTI−CHIP
TA8490F
TA8490F
3−PHASE FULL WAVE BRUSHLESS DC MOTOR DRIVER IC FOR CD−ROM DRIVES
This 3−phase, full−wave, brushless DC motor driver IC has been
developed for use in CD−ROM drive spindle motors. The
TA8490F contains in its upper stage a discrete power transistor
which, thanks to its low−saturation characteristic, enables the IC
to provide superior thermal efficiency.
Furthermore, the multi−chip structure of this device facilitates
dispersion of the heat generated inside the package, making it
possible to suppress heat concentration.
FEATURES
l Multi−chip structure (3 RN6006 chips built−in)
l 3−phase, full−wave, semi−linear drive
l Current drive / current control
l Built−in current limiter : ILIM = 0.6A (typ.) (at RF = 0.3 Ω)
l Built−in reversing brake / short brake functions
l FG signal output (using hall element output signal)
l Built−in switching regulator controller
l Built−in hall bias
l Built−in thermal shutdown circuit
l Package : MFP−30
Weight : 0.63 g (typ.)
1 2001-06-13
1 page  
TA8490F
ELECTRICAL CHARACTERISTICS (VCC = 5 V, VM = 12 V, Ta = 25°C,)
CHARACTERISTICS
Supply Voltage
Input Current
Hall Amp.
Common Mode Input
Voltage Range
Input Amplitude
Hall Element Bias Saturation Voltage
Common Mode Input
Voltage Range
Input Current
Dead Zone Voltage
Control Amp. Width
Input Offset Voltage
Current Limit
Amp.
Limit Current
RUN / STOP
Control Circuit
Input Voltage (H)
Input Voltage (L)
Input Current
Saturation Voltage
(Upper Side)
Output Circuit
Saturation Voltage
(Lower Side)
Cut−off Current
(Upper Side)
Cut−off Current
(Lower Side)
Mode Select
Circuit
Input Voltage (H)
Input Voltage (L)
Input Current
SYMBOL
ICC1
ICC2
IINH
VCMRH
VH
VHB
VCMRC
IINC
VDZ
∆VOFF (F)
∆VOFF (R)
ILIM
VINS (H)
VINS (L)
IINS (L)
Vsat (U)
TEST
CIRCUIT
TEST CONDITION
Stop mode
1
Run mode, output open
2 VCMRH = 2.5 V
――
―
2 IHB = 10 mA
2―
2 VC = Vref = 2.5 V
― VREF = 2.5 V, RF = 0.3 Ω
CW mode, Vref = 2.5 V, RF
= 0.3 W
3
CCW mode, Vref = 2.5 V,
RF = 0.3 Ω
3 RF = 0.3 Ω
(RUN)
1 (STOP)
VINS = GND
4 Io = 0.6 A
MIN
―
―
―
1.5
60
―
1.0
―
―
20
20
480
3.0
GND
―
―
Vsat (L)
4 Io = 0.6 A
―
IL (U)
5 VL = 16 V
―
IL (L)
VMS (H)
VMS (L)
IINMS
5 VL = 16 V
6
CCW mode
VC > Vref, BRK : L
6
Reversing brake mode
VC > Vref, BRK : L
6 VMS = GND
―
3.0
―
―
TYP.
2
7
―
―
―
1.3
―
―
100
50
50
600
―
―
―
0.1
0.6
―
―
―
―
―
MAX UNIT
4.5 mA
15
2 µA
4.0 V
― mVP-P
2.0 V
4.0 V
5.0 µA
― mV
150
mV
150
720 mA
VCC
1.0
1
V
µA
1.3
V
1.0
10
µA
10
VCC
0.5
1
V
µA
5 2001-06-13
5 Page 
l Hall element bias circuit
TA8490F
The hall element bias current is turned off when the driver IC is in standby state.
Make sure that the negative hall bias line is connected to the HB pin.
The remaining voltage is as follows :
VHB = 1.2 [V] (typ.) at IHB = 10 mA
Furthermore, this circuit cannot be used if FG output is necessary in standby state.
When the HB terminal is not used, the negative hall bias line must be connected to GND with a resistor in
between.
l FG amp circuit
This circuit uses a hall element signal which is output to FGO after a Schmitt stage.
The FG amp has a hysteresis of 20 [mVp−p] (typ.) and its output voltages are
High level : VCC − 0.5~VCC [V]
Low level : GND~0.5 [V] at IOFG = 10 µA
The FG amp is active when it is in standby state. When the hall element signal is input, the FG signal is
output.
11 2001-06-13
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet TA8490F.PDF ] | |
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