直流无刷电机驱动芯片

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
Lc (B)
Lc VM1 Lb
FUNCTION
REMARKS
Control amplifier input terminal
Use the control signal as input.
Control amplifier reference voltage input terminal
Use the reference voltage for the control amplifier as input.
(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)
5
VL = 16 V
―
VMS (H)
6
CCW mode VC > Vref, BRK : L
c−phase positive hall signal input terminal
Connect to hall element output terminal.
a−phase negative hall signal input terminal
Connect to hall element output terminal.
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.
3.0
VMS (L)
6
Reversing brake mode VC > Vref, BRK : L
a−phase negative hall signal input terminal
Connect to hall element output terminal.
a−phase positive hall signal input terminal
Connect to hall element output terminal.
UNIT V
4
2001-06-13
TA8490F
ELECTRICAL CHARACTERISTICS (VCC = 5 V, VM = 12 V, Ta = 25°C,)
CHARACTERISTICS
Supply Voltage
Input Current
Hall Amp.
Common Mode Input Voltage Range
Connect a capacitor between this terminal and GND.
Switching regulator control signal output terminal
Connect to the base of the switching external transistor.
Hall element bias terminal
Open collector output. Connect to the negative side of hall element bias line.
Control system phase compensator terminal
Connect a capacitor between this terminal and GND.
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
Lb (B)
La (B) La VM2 CP
GND2
OSC
SWC
SB
FGO
BRK Hb− Hb+ Ha− Ha+ Hc+ Hc− HB
CT
VCC
FUNCTION
REMARKS
b−phase upper side power transistor (base) output terminal
Keep open.
Output mode when VC > Vref Connect to hall element output terminal.
b−phase positive hall signal input terminal
Connect to hall element output terminal.
Sets limiter current value and current gain.
c−phase upper side power transistor (base) output terminal
Keep open.
c−phase output terminal
Connect to the coil.
Switching power source system phase compensator terminal
Connect to VM1 externally.
Connect a capacitor between this terminal and GND.
GND
―
Triangular wave oscillation terminal
RUN / STOP control terminal
H: RUN, L: STOP
FG amplifier output terminal
Outputs a signal whose frequency is determined by the CD rotation frequency.
Brake mode select terminal b−phase negative hall signal input terminal
2
VCMRH = 2.5 V
―
ຫໍສະໝຸດ Baidu
―
―
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
Supply voltage terminal for control circuits
VCC (opr) = 4.5~5.5 V
3
2001-06-13
TA8490F
TERMINAL No. 21
22
23
24
25 26
27
28 29 30
TERMINAL SYMBOL
VC Vref
MS
Cd
GND1 RF
Supply voltage terminal for motor drive b−phase output terminal
Connect to VM2 externally. Connect to the coil.
ABSOLUTE MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC
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
Current Limit Amp.
Limit Current
RUN / STOP Control Circuit
Input Voltage (H) Input Voltage (L) Input Current
Saturation Voltage (Upper Side)
Output Circuit
a−phase upper side power transistor (base) output terminal
Keep open.
a−phase output terminal
Connect to the coil.
Supply voltage terminal for motor drive
Mode select terminal
Determines output mode.
Forward / reverse changeover gain adjustment terminal
Adjust a rotation direction changeover gain
GND
―
Output current detection terminal
RATING
7 16 1.2 1.0 150 −20~75 −55~150
UNIT
V
A W °C °C °C
OPERATING VOLTAGE RANGE
CHARACTERISTIC Power Supply Voltage
SYMBOL
VCC VM
OPERATING RATING
4.5~5.5
3~14
Power Supply Voltage
Output Current Power Dissipation Junction Temperature Operating Temperature Storage Temperature
Note 1: unmounted
SYMBOL
VCC VM IO PD(Note 1) Tj Topr Tstg
Input Amplitude
Hall Element Bias Saturation Voltage
Common Mode Input Voltage Range
Input Current
Dead Zone Voltage Control Amp. Width
Input Offset Voltage
Weight : 0.63 g (typ.)
1
2001-06-13
BLOCK DIAGRAM
TA8490F
2
2001-06-13
TA8490F
PIN ASSIGNMENT
TERMINAL No. 1
2 3 4 5 6 7
8 9 10 11 12 13 14 15 16 17 18
19 20
TERMINAL SYMBOL