< Dual-In-Line Package Intelligent Power Module >

PSS20S71F6

TRANSFER MOLDING TYPE

INSULATED TYPE

Publication Date : December 2013

9

Fig. 7 MCU I/O Interface Circuit

Fig. 8 Pattern Wiring Around the Shunt Resistor

Fig. 9 Pattern Wiring Around the Shunt Resistor (for the case of open emitter)

When DIPIPM is operated with three shunt resistors, voltage of each shunt resistor cannot be input to CIN terminal directly. In that case, it is necessary to use

the external protection circuit as below.

μs when short circuit occurs.

SC interrupting time might vary with the wiring pattern, comparator speed and so on.

(2) It is recommended for the threshold voltage Vref to set to the same rating of short circuit trip level (Vsc(ref): typ. 0.48V).

(3) Select the external shunt resistance so that SC trip-level is less than specified value (=2.0 times of rating current).

(4) To avoid malfunction, the wiring A, B, C should be as short as possible.

(5) The point D at which the wiring to comparator is divided should be close to the terminal of shunt resistor.

(6) OR output high level when protection works should be over 0.51V (=maximum Vsc(ref) rating).

(7) GND of Comparator, GND of Vref circuit and Cf should be not connected to power GND but to control GND wiring.

Fo

DIPIPM

MCU

10k

Ω

5V line

3.3k

Ω(min)

Note)

Design for input RC filter depends on PWM control scheme used

in the application and wiring impedance of the printed circuit board.

DIPIPM input signal interface integrates a minimum 3.3k

Ω

pull-down resistor. Therefore, when inserting RC filter, it is

necessary to satisfy turn-on threshold voltage requirement.

Fo output is open drain type. It should be pulled up to control

power supply (e.g. 5V, 15V) with a resistor that makes Fo sink

Ω

（

5kΩ or more） is recommended.

Wiring Inductance should be less than 10nH.

Inductance of a copper pattern with

length=17mm, width=3mm is about 10nH.

NU, NV, NW should be connected

each other at near terminals.

N1

NU

NV

NW

DIPIPM

be connected close to the

terminal of shunt resistor.

Shunt

resistor

DIPIPM

NU

NV

NW

N1

Low inductance shunt resistor like surface mounted (SMD) type is recommended.

be connected close to the

terminal of shunt resistor.

Shunt

resistors

Each wiring Inductance should be less than 10nH.

Inductance of a copper pattern with

length=17mm, width=3mm is about 10nH.

P

V

U

W

N-side IGBT

P-side IGBT

Drive circuit

DIPIPM

NW

Drive circuit

CIN

NV

NU

-

Vref

+

Vref

Vref

Comparators

(Open collector output type)

External protection circuit

Protection circuit

Shunt

resistors

5V

B

A

C

OR output

D

N1

-

+

-

+