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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207

August 1997

HV400MJ/883

High Current MOSFET Driver

Features

• This Circuit is Processed in Accordance to MIL-STD-

883 and is Fully Conformant Under the Provisions of

Paragraph 1.2.1.

• Fast Fall Times . . . . . . . . . . . . . . . . . . .16ns at 10,000pF

• No Supply Current in Quiescent State

• Peak Source Current . . . . . . . . . . . . . . . . . . . . . . . . . .6A

• Peak Sink Current . . . . . . . . . . . . . . . . . . . . . . . . . . .30A

• High Frequency Operation . . . . . . . . . . . . . . . . . 300kHz

Applications

• Switch Mode Power Supplies

• DC/DC Converters

• Motor Controllers

• Uninterruptable Power Supplies

Description

The HV400MJ/883 is a single monolithic, non-inverting high

current driver designed to drive large capacitive loads at high

slew rates. The device is optimized for driving single or paral-

lel connected N-Channel power MOSFETs with total gate

charge from 5nC to >1000nC. It features two output stages

pinned out separately allowing independent control of the

MOSFET gate rise and fall times. The current sourcing output

stage is an NPN capable of 6A. An SCR provides over 30A of

current sinking. The HV400MJ/883 achieves rise and fall

times of 54ns and 16ns respectively driving a 10,000pF load.

Special features are included in this part to provide a simple,

high speed gate drive circuit for power MOSFETs. The

HV400MJ/883 requires no quiescent supply current, how-

ever, the input current is approximately 15mA while in the

high state. With the internal current steering diodes (Pin 7)

and an external capacitor, both the timing and MOSFET gate

power come from the same pulse transformer; no special

external supply is required for high side switches. No high

voltage diode is required to charge the bootstrap capacitor.

The HV400MJ/883 in combination with the MOSFET and

pulse transformer makes an isolated power switch building

block for applications such as high side switches, secondary

side

regulation

and

synchronous

rectification.

The

HV400MJ/883 is also suitable for driving IGBTs, MCTs,

BJTs and small GTOs.

The HV400MJ/883 is a type of buffer; it does not have input

logic level switching threshold voltages. This single stage

design achieves propagation delays of 20ns. The output

NPN begins to source current when the voltage on Pin 2 is

approximately 2V more positive than the voltage at Pin 8.

The output SCR switches on when the input Pin 2 is 1V

more negative than the voltage at Pins 3/6. Due to the use of

the SCR for current sinking, once the output switches low,

the input must not go high again until all the internal SCR

charge has dissipated, 0.5

µs - 1.5µs later.

Ordering Information

PART NUMBER

TEMP.

PACKAGE

PKG.

NO.

HV400MJ/883

-55 to 125

8 Ld SBDIP

D8.3

Pinout

HV400MJ/883 (SBDIP)

TOP VIEW

Schematic

1

2

3

4

8

7

6

5

SOURCE OUTPUT

DIODES

SINK OUTPUT

V+ SUPPLY

GND

SINK OUTPUT

GND

INPUT

D1

D7

R1

R2

D6

Q2

Q1

D3

D2

R4

D4

D8

PIN 7

PIN 8

PIN 5

PIN 6

SCR

PIN 4

R3

PIN 3

PIN 1

PIN 2

File Number

3584.2