TPD4124K TOSHIBA Semiconductor CORPORATION, TPD4124K Datasheet - Page 11

• Manufacturer Part Number: TPD4124K
• Description: Dc Brush Less Motor Driver
• Manufacturer: TOSHIBA Semiconductor CORPORATION

External Parts
Handling precautions
Typical external parts are shown in the following table.
Note 1: The required bootstrap capacitance value varies according to the motor drive conditions. The capacitor is
Note 2: The following formula shows the detection current: I
Note 3: When using this product, adjustment is required in accordance with the use environment. When mounting,
Note 4: The DIAG pin is open drain. If not using the DIAG pin, connect to the GND.
C
1
(1) Please control the input signal in the state to which the V
(2) The RS pin connecting the current detection resistor is connected to a comparator in the IC and also
, C
Part
R
C
C
C
C
R
biased by V
Do not exceed a detection current of 2 A when using this product.
(Please go from the outside in the over current protection.)
place as close to the base of this product leads as possible to improve the ripple and noise elimination.
2
1
4
5
6
7
2
, C
power supply and the V
Note that if the power supply is switched off as described above, this product may be destroyed if the
current regeneration route to the V
or similar while the motor is still running.
functions as a sensor pin for detecting over current. As a result, over voltage caused by a surge voltage, for
example, may destroy the circuit. Accordingly, be careful of handling the IC or of surge voltage in its
application environment.
3
CC
0.35 Ω ± 1 % (1 W)
and must be sufficiently derated for it.
25 V/1000 pF
25 V /0.1 μF
25 V/2.2 μF
25 V/10 μF
25 V/1 μF
Typical
5.1 kΩ
CC
power supply are not cared about either.
BB
power supply is blocked when the V
V
V
REG
V
CC
V
REG
DIAG pull-up resistor
CC
Bootstrap capacitor
Current detection
power supply stability
power supply stability
11
for surge absorber
for surge absorber
Purpose
O
= V
R
CC
÷ R
voltage is steady. Both of the order of the V
1
(For V
R
Remarks
(Note 1)
(Note 2)
(Note 3)
(Note 3)
(Note 3)
(Note 3)
(Note 4)
= 0.5 V)
BB
line is disconnected by a relay
TPD4124K
2008-11-26
BB