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TB67B000HG

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32
TB67B000HG
2013-5-9
13
3. Dead Time Insertion
(cross conduction protection)
To prevent a short-circuit between external low-side and high-side power elements during sine-wave PWM
drive, a dead time is digitally inserted between the turn-on of one side and the turn-off of the other side.
(The dead time is also implemented at the full duty cycle during square-wave drive.)
T
d
= 9/f
osc
When f
osc
= 5 MHz, T
d
∼
−
1.8 μsec (9/f
osc)
f
osc
= reference clock (CR oscillation frequency)
When input voltage (V
SP
) is more than 2.1 V
and the hall signal frequency is 1Hz or less, the upper phase
(UH, VH, and WH) operates PWM drives (according to V
SP
) with120° commutation. And the lower phase
(UL, VL, and WL) operates with 120° commutation. It refreshes in off timing. (In case of reverse direction
drive, the operation is the same as forward direction drive.)
T
SP
: Changeable by V
SP.
(The condition in this figure: V
SP
= 5.4 V (typ.)), T
on
= 18/f
osc
, Td = 9/f
osc.
*: Lead angle offset (LA pin) is not activated when hall signal frequency is 1 Hz or less. The lead angle is
also deactivated in detecting of reverse rotation.
4. Lead Angle Control
The lead angle can be adjusted between 0° and 58° according to the induced voltage level on the LA input.
SS=L
LA analog input (0 to 5 V in 32 separate steps.)
0 V = 0°
5 V = 58° (A lead angle of 58° is assumed when the LA voltage exceeds 5 V.)
SS=H
LA analog input (0 to 5 V in 16 separate steps).
0 V = 0°
5 V = 28° (A lead angle of 28° is assumed when the LA voltage exceeds 5 V.)
Enhanced
UH
UL
VH
VL
WH
WL
Output waveform (Image)
T
on
T
d
WH
WL
T
d
T
SP
UH
(VH, WH)
T
d
T
d
UL
(VL, WL)
TB67B000HG
2013-5-9
14
5. PWM Carrier Frequency
The triangular waveform generator provides a carrier frequency of f
osc
/252 necessary for PWM generation.
(The triangular wave is also used to force the switch-on of low-side transistors during square-wave drive.)
Carrier frequency: F
C
= f
osc
/252 (Hz),
where f
osc
= reference clock (crystal oscillator) frequency
6. Position Detecting Pin
<Hall device input>
V
W
is 0.5 to 4.0 V in in-phase range. Input hysteresis voltage (V
H
) is 7.5 mV (typ.).
<Hall IC input>
Usage conditions: HUP, HVP, and HWP = GND to Vrefout
HUM, HVM, and HWM = Vrefout / 2
7. Rotating Pulse Output
The TB67B000HG outputs rotating pulse based on hall signal. FGC terminal can switch one pulse per
electrical angle or 3 pulses per electrical angle. One pulse per electrical angle is generated from hall signal
of U phase. 3 pulses per electrical angle are generated by combining each rising and falling edge of U, V,
and W phases.
When the pulse is outputted at 2.4 pulses per electrical angle (FGC=M), FG terminal outputs L level under
the condition that the direction of motor rotating is forward or reverse at 1Hz or less. It is outputted
regardless of the input voltage of Vsp.
FGC FG
High 1 pulse per electrical angle
Middle 2.4 pulse per electrical angle (2 pulse per 5/6 electrical angle)
Low 3 pulses per electrical angle
V
H
HUM
HUP
V
S
= 40 mV or more
V
S
V
H
= 7.5 mV (typ.)
V
H
TB67B000HG
2013-5-9
15
Timing Chart of FG Signal
8. Protection-Related Input Pins
(1) Overcurrent protection(I
dc
pin)
If the voltage of the DC-link current exceeds the internal reference voltage, the gate block is activated
and the commutation signals (U, V, and W) are forced Low. Overcurrent protection is disabled after
every carrier period under the condition that the voltage is 0.5 (typ.).
Reference voltage = 0.5 V (typ.)
(2) Abnormal position signal protection
When the position detection signals (internal hall sensor outputs) are all Highs or all Lows, or
position input signals (HUP, HUM, HVP, HVM, HWP, and HWM) are all open, the commutation
outputs (U, V, and W) are forced off. When these inputs are then set to any other combination, the
commutation outputs are re-enabled.
(3) Undervoltage lockout (V
CC
)
While the power supply voltage is outside the rated range during power-on or power-off, the
commutation outputs (U, V, and W) are set to the high-impedance state to prevent external power
elements from damage due to short-circuits.
<V
CC
>
Output OFF
Drive output
Supply voltage 11.5 V (typ.) 11.0 V (typ.)
GND
V
BB
V
: 15V
(
t
yp
.
)
Output OFF
Output drive
HWM
HVP
HWP
HUP
HVM
HUM
FGC = Low
FGC = High
FGC = Middle
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TB67B000HG

Mfr. #:
Buy TB67B000HG
Manufacturer:
Toshiba
Description:
Motor / Motion / Ignition Controllers & Drivers Brushed DC Motor Driver IC
Lifecycle:
New from this manufacturer.
Delivery:
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