Application circuit – C&H Technology PS22A74 User Manual

Page 6

PS22A74

Intellimod™ Module

Dual-In-Line Intelligent Power Module

15 Amperes/1200 Volts

Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272

Rev. 08/09

Application Circuit

Component Selection:
Dsgn.

Typ. Value

Description

1A, 600V

Control and boot strap supply overvoltage suppression

DZ1

24V, 1W

Control and boot strap supply over voltage suppression

10-100µF, 50V

Boot strap supply reservoir – electrolytic long lifem low impedance, 105°C

0.22-2.0µF, 50V

Local decoupling/High frequency noise filters – multilayer ceramic (Note 4)

200 to 2500µF, 450V

Main DC bus filter capacitor – electrolytic, long life, high ripple current, 105°C

100pF, 50V

Optional input signal noise filter – multilayer ceramic (Note 11)

0.1-0.22µF, 1000V

Surge voltage suppression (Note 2)

CSF

1000pF, 50V

Short circuit detection filter capacitor – multilayer ceramic

RSF

1.8kΩ

Short circuit detection filter resistor

RSHUNT 20ohm-500ohm

Current sensing resistor

1-10Ω

Boot strap supply inrush limiting resistor – non-inductive, temperature stable, tight tolerance (Note 5)

330Ω

Optional input signal noise filter (Note 11)

10kΩ

Fault signal pull-up resistor (Note 9)

Notes:
1) If control GND is connected to power GND by broad pattern, it may cause malfunction by power GND fluctuation.

It is recommended to connect control GND at only a point at which NU, NV, NW are connected to power GND line.

2) To prevent surge destruction, the wiring between the smoothing capacitor and the P-N1 terminals should be as short as

possible. Generally inserting a 0.1µ ~ 0.22µF snubber capacitor C3 between the P-N1 terminals is recommended.

3) The time constant R1,C4 of RC filter for preventing the protection circuit malfunction should be selected in the range of 1.5µ ~ 2µs.

SC interrupting time might vary with the wiring pattern. Tight tolerance, temp-compensated type is recommended for R1,C4.

4) All capacitors should be mounted as close to the terminals of the DIPIPM as possible. (C1: good temperature, frequency

characteristics electrolytic type, and C2 : good temperature, frequency and DC bias characteristic ceramic type are recommended.)

5) It is recommended to insert a Zener diode DZ1 (24V/1W) between each pair of control supply terminals to prevent surge destruction.

6) To prevent erroneous SC protection, the wiring from VSC terminals to CIN filter should be divided at the point D that is close

to the terminal of sense resistor and the wiring should be patterned as short as possible.

7) For sense resistor, the variation within 1% (including temperature characteristics), low inductance type is recommended.

1/8W is recommended, but an evaluation of your system is recommended.

8) To prevent erroneous operation, wiring A, B, and C should be as short as possible.
9) FO output is open drain type. It should be pulled up to the positive side of 5V or 15V power supply with a resistor that limits

FO sink current (IFO) under 1mA. (Over 5.1kΩ is needed and 10kΩ is recommended for 5V supply.)

10) Error signal output width (tFO) can be set by the capacitor connected to the CFO terminal. tFO(typ) = CFO / 9.1 x 10-6 (s).

11) Input drive is high-active type. There is a 3.3kΩ pull-down resistor integrated in the IC input circuit. To prevent malfunction, the wiring of each input

should be patterned as short as possible. When inserting the RC filter, make sure the input signal level meets the turn-on and turn-off threshold voltage.

Thanks to HVIC inside the module, connection to the MCU may be direct or with an opto-coupler.

VN1

VOT

VNC

VNO

VSC

RSHUNT

CIN

CSF

RSF

CFO

HVIC1

IGBT1

FWDi1

IGBT2

FWDi2

IGBT3

IGBT4

IGBT5

IGBT6

FWDi3

FWDi4

FWDi5

FWDi6

LVIC

HVIC2

VWFB

VP1

VWFS

VPC

HVIC3

DZ1

15V

DZ1

VVFB

VP1

VVFS

DZ1

MCU

VUFB

VP1

VUFS

DZ1