BP7B-LS datasheet(4/6 Pages) POWEREX

4 / 6 page

transistor turns on and its collector pulls the fault feedback

line low to indicate a fault. If any of the IPM’s four fault

output signals become active; pin 39 of the VLA606-01R

will be pulled low. Slow optos are used because they offer

the advantages of lower cost and higher current transfer

ratios.

High speed is not necessary because the IPM

disables a faulted device and produces a fault signal for a

minimum of 1ms. The BP7B also includes an LED in series

with each fault output (LED1-LED4) to provide a quick

visual indication when the IPM’s fault signal is active. This

was included for trouble shooting purposes only so it can

be replaced by a jumper without affecting the operation of

the interface circuit.

Isolated control power for the IPM is supplied by

Powerex isolated DC to DC converters (IC3, IC4, IC5, IC6)

as described above. Each power supply is decoupled at

the IPM’s pins with a low impedance electrolytic capacitor

(C1-C4).

These capacitors must be low impedance/high

ripple current types because they are required to supply the

high current gate drive pulses to the IPM’s internal gate

driving circuits.

The DC to DC converters are powered

from a single 24VDC supply connected at CN3.

The

24VDC supply is decoupled by the electrolytic capacitor C5

to maintain a stable well filtered source for the DC to DC

converters. The current draw on the 24V supply will range

from about 75mA to 200mA depending on the module

being driven and switching frequency. For a more accurate

estimate it is necessary to use the IPM’s circuit current (ID)

versus fC characteristic to obtain the current required by the

IPM being used.

The IPM current draw can then be

adjusted

using

the

converter

efficiency

specification to arrive at the current draw on the 24V

supply.

Refer to the general IPM application notes for

detailed information.

A power indicator consisting of an

LED (LED5) in series with current limiting resistor (R4) is

provided to show that the 24VDC supply is present.

Figure 5: Interface Circuit PCB layout

Table 2: BP7B Reference Design Component Selection

Designation

Characteristic

Description

4.7K

Ω, 0.25W

Brake input pull-up

180

Ω, 0.25W

Input current limiter (15mA@VL=5V)

4.7K

Ω, 0.25W

Fault signal pull-up

1.8K

Ω, 0.25W

Power Indicator Current limiter

C1, C2, C3

μF, 35V, 105C, Low imp.

Control power decoupling capacitor

150

μF, 35V, 105C, Low imp.

Control power decoupling capacitor

560

μF, 50V, 105C, Low imp.

DC to DC input decoupling capacitor

LED1, LED2, LED3, LED4

Super bright red LED

Fault indicator LED

LED5

Super bright green LED

Control power LED

IC1

Slow Opto coupler NEC PS2501

Brake signal isolator

2 position 0.1” right angle single row header

24VDC Control power connector

10 position 0.1” right angle single row header

Control signal connector

2mm single row bottom entry header receptacle

IPM connector Hirose DF10-31S-2DSA

IC2

Powerex VLA606-01R

Control and Fault signal isolator

IC3, IC4, IC5

Powerex VLA106-24151

High side isolated DC/DC converter

IC6

Powerex VLA106-24151 or VLA106-24154

Low side isolated DC/DC converter

GND

FOUPVP WP

UNVN WN+VL

VN1

VNC

VWP1

WFO

VWPC

VVP1

VFO

VVPC

VUP1

UFO

VUPC

- +

Figure 4: BP7B External Connections

BP7B-LS Datasheet(PDF) 4 Page - Powerex Power Semiconductors

BP7B-LS Datasheet(HTML) 4 Page - Powerex Power Semiconductors

Html Pages

1 2 3 4 5 6

Datasheet Download

Link URL