BG2C datasheet, PDF - EEWORLD Datasheet

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BG2C: DescriptionEVAL BOARD FOR VLA513-01R; CategoryDevelopment board/suite/development tools; File Size609KB，4 Pages; ManufacturerPOWEREX; Websitehttp://www.pwrx.com/Home.aspx; Environmental Compliance

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BG2C Overview

EVAL BOARD FOR VLA513-01R

BG2C Parametric

Parameter Name	Attribute value
type	Power management
Function	IGBT power module driver
Embedded	no
IC/parts used	Powerex IGBT module
Main attributes	-
What's included	Board without components (bare board)
Auxiliary properties	-

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BG2C – Universal Gate Drive Prototype Board

Application Notes

Description:

The BG2C is a two channel gate drive circuit designed for use with high frequency optimized IGBT

modules. The BG2C utilizes Powerex VLA513-01R hybrid gate drivers and VLA106 series DC- to- DC converters

to provide efficient switching of modules rated up to 300A. The hybrid gate drivers include high speed opto-couplers

with typical propagation delay times as short as 200ns for control signal isolation. The hybrid DC-to-DC converters

provide fully isolated control power for each driving channel.

Features:



3A or 5A Peak Output Current



2500VRMS isolation for control power and signals



Standard AMP MTA .100” input connector



Operates from a single 15 VDC or 24 VDC supply



Wide output voltage swing +15V/-8V



Low parts count – only 17 parts for two channels



Compact Size 2.7” x 2.4” (69mm x 61mm)

Applications:

BG2C is designed for use with Powerex NFH series

and CM***DUS-12F high frequency IGBT

modules.



Use

VLA106-15242

DC-to-DC converter for

operation with 15 VDC control power



Use

VLA106-24242

DC-to-DC converter for

operation with 24 VDC control power

Ordering Information: BG2C-5015

is a kit with a bare BG2C board, two VLA513 and two VLA106-15242s

BG2C

is a bare PCB only

BG2C Application Guide

Gate Driver

Part Number

Peak Drive

Current (I

)

Minimum

Typical Application*

(IGBT Module Rating)

DC/DC

Converter

VLA513-01R

+/- 5A

2.0 Ω

Up to 600A

VLA106-15242

For 15VDC Input

VLA106-24242

For 24VDC Input

* Compatible IGBT module depends on voltage rating, switching frequency and selected R

. Refer to Powerex application notes for details.

Note:

For high frequency applications using modules with current ratings larger than 300A, the Powerex VLA502-01 driver is recommended.

Publication Date: 02-03-2016

Rev. 1

Figure 1: VLA513-01R Block Diagram

Figure 2: VLA106-15242, VLA106-24242

Block Diagram

Circuit Explanation:

The BG2C is a basic two channel gate driver designed around the recommended application

circuits for the Powerex VLA513-01R hybrid IGBT gate drivers in combination with either VLA106-15242 or

VLA106-24242 isolated DC-to-DC converters.

A functional block diagram of the VLA513-01R hybrid gate drivers is shown for reference in Figure 1. These gate

drivers are optimized for use with Powerex NFH series and CM**DUS-12F IGBT modules. The drivers use a

high speed open collector type opto-coupler to provide 2500VRMS isolation of control signals. The output stage is

designed to provide high current gate drive with the appropriate on- and off-state bias voltages for large IGBT

modules. For additional detailed information on the characteristics and operation of these gate drivers please

refer to the individual device datasheets.

Figure 2 shows a block diagram of the VLA106-15242 and VLA106-24242 hybrid DC-to-DC converters. These two

devices are identical except that VLA106-15242 is designed to operate from a 15 VDC input and the VLA106-24242

is designed to operate from a 24 VDC input. These DC-to-DC converters use a transformer to provide 2500VRMS

isolation for gate drive power. The converter’s regulated 24VDC output is split using a resistor and zener diode

to provide +15.8V and -8.2V for the hybrid gate driver. For additional detailed information on the operation of the

hybrid DC-to-DC converters please see the individual device datasheets.

A complete schematic and component selection guide for the BG2C is shown in Figure 3. The board will

normally be operated with two input voltage sources. A 5V logic source (+V

) provides drive for the high speed

opto-couplers inside the hybrid gate drivers. A control power supply (+V

) provides power for the gate driver and

is connected to the primary side of the DC-to-DC converters at Pins 8, 9 and 10, 11. The +V

source is decoupled

with a low impedance electrolytic capacitor C1. The capacitor is connected close to the input pins of the DC-to-DC

converters to provide a stable, well-filtered DC source. A 390µF capacitor was selected for C1 to provide the

required ripple current and filtering assuming a maximum driven load and a significant distance to the main filter

capacitor of the +V

supply. These capacitors will be larger than necessary if the driven load is smaller or the V

supply main filter capacitors are nearby. The DC-to-DC converters provide isolated gate drive power which

consists of +15.8V (V

) at Pin 3 and -8.2 (V

) at Pin 1 with respect to common at Pin 2. The gate drive power

supplies are decoupled using the low impedance electrolytic capacitors C2, C3, C4, and C5. It is very important

that these capacitors have low enough impedance and sufficient ripple current capability to provide the

required high current gate drive pulses. The 390µF low impedance capacitors used on the BG2C are sized to

supply 5A gate pulses at a 60 KHz rate. If the application is operating at lower frequency or lower peak current it

may be possible to reduce the size of these capacitors.

The isolated V

and V

supplies provided by the DC-to-DC converters are connected to the hybrid gate

drivers at Pins 6 and 8 to provide gate drive power. The hybrid gate driver amplifies the control input signal and

produces high current gate drive at Pin 7. The gate drive current is adjusted by selecting the appropriate series

gate resistance (R

). R

will normally be adjusted to provide suitable drive for the module being used

considering dynamic performance, losses and switching noise. For more information on selecting R

see Powerex

IGBT module application notes. Protection against gate voltage surges is provided by Z1, Z2, Z3, and Z4. These

zener diodes also help to control short circuit currents by shunting miller current away from the gate.

Application Notes

Publication Date: 02-03-2016

Rev. 1

The control signal interface is designed for use with standard 5V CMOS logic. The control input signals at Pins 2

and 3 of connector CN1 are used to turn the IGBTs on and off. These signals are active low which means that the

gate driver output will be high (IGBT on) when they are pulled low. These control pins are connected directly to

Pin 1 of the hybrid gate driver which is connected internally through a 180Ω limiting resistor to the cathode of the

LED in the high speed opto-coupler (see Figure 1). When the control signal is pulled low, current flows from the 5V

logic supply through the LED to turn the gate driver’s output on. The control pins must be pulled low with a buffer

that is capable of sinking at least 16mA in order to turn on the high speed opto-coupler inside the hybrid gate driver.

A CMOS buffer that actively pulls its output high in the off state (74HC04 or similar) is recommended for

maintaining good common mode noise immunity. Open collector drive that allows IN1 and IN2 to float will degrade

common mode noise immunity and is therefore not recommended.

Printed Circuit Layout:

Figure 5 shows the layout of the BG2C two channel gate driver board. The compact

2.7” x 2.4” circuit board with only 17 components clearly demonstrates the advantage of using hybrid gate

drivers and DC-to-DC converters. One important feature is the use of three ground plane islands for the regions of

the PCB having high voltage differences. Two of the islands are tied to the IGBT emitter/circuit common (Pin 2 of

the DC-to-DC converters) of each output channel. The third island is connected to logic interface common at Pin 6

of CN1. This layout provides shielding to help prevent undesirable coupling of noise between the control side and

the gate drive channels.

Additional Information:

Detailed information about the operation and electrical characteristics of the

VLA513-01R hybrid gate driver can be found on the individual device datasheets. Electrical characteristics

such as input voltage range, efficiency, and output voltage regulation of the VLA106-15242 and VLA106-24242

DC-to-DC converters can also be found on the individual device data sheets. Information about calculating gate

drive current and selection of series gate resistors (R

) can be found in the general IGBT module and gate drive

application notes. For applications using higher current IGBT modules refer to the application notes for the

VLA502-01 hybrid gate driver and BG2A reference design. All of these documents are available on the Powerex

website at

www.pwrx.com.

For design assistance with any of the products covered in this application note

contact Powerex at (724) 925-7272 and request application engineering. For product pricing and availability call the

Power Line: 1-800-451-1415

Application Notes

SOLDER SIDE

COMPONENT SIDE

Figure 5: BG2C Printed Circuit Board Layout

Publication Date: 02-03-2016

Rev. 1

BG2C Related Products

	BG2C	BG2C-3015	BG2C-5015
Description	EVAL BOARD FOR VLA513-01R	kit dev board 3A for igbt	kit dev board 5A for igbt

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