TPD4111K TOSHIBA Semiconductor CORPORATION, TPD4111K Datasheet - Page 10

• Manufacturer Part Number: TPD4111K
• Description: Toshiba Intelligent Power Device High Voltage Monolithic Silicon Power Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

External Parts
Handling precautions
Standard external parts are shown in the following table.
Note 1: The required bootstrap capacitance value varies according to the motor drive conditions. Although the IC
Note 2: The following formula shows the detection current: I
Note 3: With the combination of Cos and R
Note 4: When using the IC, some adjustment is required in accordance with the use environment. When mounting,
Note 5: The FG pin is open drain. Note that when the FG pin is connected to a power supply with a voltage higher
Note 6: If noise is detected on the Input signal pin, add a capacitor between inputs.
Note 7: A Hall device should use an indium antimony system.
(1)
(2)
(3)
(4)
C
1
, C
Part
R
C
R
C
C
R
can operate at above the V
be greater than or equal to 13.5 V to keep the power dissipation small. The capacitor is biased by V
must be sufficiently derated accordingly.
Do not exceed a detection current of 1 A when using the IC.
intrinsic error factor is around 10%.
The PWM frequency is broadly expressed by the following formula. (In this case, the stray capacitance of
the printed circuit board needs to be considered.)
f
R
small it exceeds the current capacity of the IC internal circuits and the triangular wave distorts. Set R
at least 9 kΩ.
place as close to the base of the IC leads as possible to improve noise elimination.
than or equal to the V
is not used, connect to the GND.
PWM
2
1
4
2
5
6
3
When switching the power supply to the circuit on/off, ensure that V
off). At that time, either the V
switched off as described above, the IC may be destroyed if the current regeneration route to the V
power supply is blocked when the V
still running.
The triangular wave oscillator circuit, with externally connected C
discharges minute amounts of current. Therefore, subjecting the IC to noise when mounting it on the
board may distort the triangular wave or cause malfunction. To avoid this, attach external parts to
the base of the IC leads or isolate them from any tracks or wiring which carries large current.
The PWM of this IC is controlled by the on/off state of the high-side IGBT.
If a motor is locked where VBB voltage is low and duty is 100%, it may not be possible to reboot after
the load is released as a result of the high side being ON immediately prior to the motor being locked.
This is because, over time, the bootstrap voltage falls, the high-side voltage decrease protection
operates and the high-side output becomes OFF. In this case, since the level shift pulse necessary to
turn the high side ON cannot be generated, reboot is not possible. A level shift pulse is generated by
either the edge of a Hall sensor output or the edge of an internal PWM signal, but neither edge is
available due to the motor lock and duty 100% command. In order to reboot after a lock, the high-side
power voltage must return to a level 0.5V (typ.) higher than the voltage decrease protection level, and
a high-side input signal must be introduced. As a high-side input signal is created by the
aforementioned level shift pulse, it is possible to reboot by reducing PWM duty to less than 100% or
REF
, C
3
= 0.65 ÷ {Cos × (R
creates the reference current of the PWM triangular wave charge/discharge circuit. If R
Recommended Value
10 V/1000 pF ± 5%
0.62 Ω ± 1% (1 W)
25 V/2.2 μF
27 kΩ ± 5%
10 V/0.1 μF
25 V/10 μF
CC
5.1 kΩ
REF
, a protection circuit is triggered so that the current flows continuously. If the FG pin
BS
+ 4.25 kΩ)} [Hz]
undervoltage level, it is however recommended that the capacitor voltage
CC
REF
or the V
BB
shown in the table, the PWM frequency is around 20 kHz. The IC
Bootstrap capacitor
Current detection
PWM frequency setup
PWM frequency setup
Control power supply stability
V
FG pin pull-up resistor
REG
line is disconnected by a relay or similar while the motor is
BB
10
power supply stability
can be turned on/off first. Note that if the power supply is
Purpose
O
= V
R
÷ R
1
(V
R
= 0.5 V typ.)
Remarks
OS
(Note 1)
(Note 2)
(Note 3)
(Note 3)
(Note 4)
(Note 4)
(Note 5)
S
and R
< VV
S
REF
OFF (all IGBT outputs
, charges and
TPD4111K
2006-06-30
REF
is set too
CC
REF
and
BB
to