TPD4112K Toshiba Semiconductor, TPD4112K Datasheet - Page 10

• Manufacturer Part Number: TPD4112K
• Description: Intelligent Power Device High Voltage Monolithic Silicon Power IC
• Manufacturer: Toshiba Semiconductor

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. The IC can
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.
(1)
(2)
(3)
(4)
C
1
, C
Part
R
C
R
C
C
R
C
operate at above the V
greater than or equal to 13.5 V to keep the power dissipation small. The capacitor is biased by V
must be sufficiently derated for it.
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 the noise elimination.
than or equal to the V
the FG pin, connect to the GND.
PWM
2
1
4
2
5
6
3
7
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.
In the state where VBB voltage is low, and Duty100%, if a motor is made to lock, after load release
may be unable to reboot. This is the high side ON of a just before lock, when a motor is locked in the
state where VBB voltage is low. It is because time becomes long, bootstrap voltage falls, the decrease
voltage protection of a high side operates and a high side output serves as OFF. In this case, since the
level shift pulse for making a high side turn on is ungenerable, it cannot reboot. A level shift pulse is
generated from the edge of a hole sensor output and the edge of a hall sensor output edge of an
internal PWM signal, neither of the edge exists by the motor lock and Duty100% command. In order
to reboot after locke, it is required for a high side input signal to enter in the state where it recovered
to voltage with high side power supply voltage higher 0.5v than a decrease voltage protection voltage
value. Since a high side input signal is created by the above-mentioned level shift pulse, it can reboot
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
BS
TBD
REF
, a protection circuit is triggered so that the current flows continuously. If not using
undervoltage level, however, it is recommended that the capacitor voltage be
+ 4.25 kΩ)} [Hz]
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
Input power supply stability
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
÷ RIS (V
R
Remarks
= 0.5 V typ.)
OS
(Note 1)
(Note 2)
(Note 3)
(Note 3)
(Note 4)
(Note 4)
(Note 5)
(Note 6)
S
and R
< VV
S
REF
OFF (all IGBT outputs
TPD4112K
, charges and
2005-11-04
REF
CC
is set too
and
REF
BB
to