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HCPL-316 Scheda tecnica(PDF) 3 Page - Agilent(Hewlett-Packard)

Il numero della parte HCPL-316
Spiegazioni elettronici  2.0 Amp Gate Drive Optocoupler with Integrated (VCE) Desaturation Detection and Fault Status Feedback
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Produttore elettronici  HP [Agilent(Hewlett-Packard)]
Homepage  http://www.home.agilent.com
Logo HP - Agilent(Hewlett-Packard)

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Product Overview
Description
The HCPL-316J is a highly
integrated power control device
that incorporates all the
necessary components for a
complete, isolated IGBT gate
drive circuit with fault protection
and feedback into one SO-16
package. TTL input logic levels
allow direct interface with a
microcontroller, and an optically
isolated power output stage
drives IGBTs with power ratings
of up to 150 A and 1200 V. A
high speed internal optical link
minimizes the propagation delays
between the microcontroller and
the IGBT while allowing the two
systems to operate at very large
common mode voltage
differences that are common in
industrial motor drives and other
power switching applications. An
output IC provides local
protection for the IGBT to
prevent damage during
overcurrents, and a second
optical link provides a fully
isolated fault status feedback
signal for the microcontroller. A
built in “watchdog” circuit
monitors the power stage supply
voltage to prevent IGBT caused
by insufficient gate drive
voltages. This integrated IGBT
gate driver is designed to
increase the performance and
reliability of a motor drive
without the cost, size, and
complexity of a discrete design.
Two light emitting diodes and two
integrated circuits housed in the
same SO-16 package provide the
input control circuitry, the output
power stage, and two optical
channels. The input Buffer IC is
designed on a bipolar process,
while the output Detector IC is
designed manufactured on a high
voltage BiCMOS/Power DMOS
process. The forward optical
signal path, as indicated by
LED1, transmits the gate control
signal. The return optical signal
path, as indicated by LED2,
transmits the fault status
feedback signal. Both optical
channels are completely
controlled by the input and
output ICs respectively, making
the internal isolation boundary
transparent to the
microcontroller.
Under normal operation, the
input gate control signal directly
controls the IGBT gate through
the isolated output detector IC.
LED2 remains off and a fault
latch in the input buffer IC is
disabled. When an IGBT fault is
detected, the output detector IC
immediately begins a “soft”
shutdown sequence, reducing the
IGBT current to zero in a
controlled manner to avoid
potential IGBT damage from
inductive overvoltages.
Simultaneously, this fault status is
transmitted back to the input
buffer IC via LED2, where the
fault latch disables the gate
control input and the active low
fault output alerts the
microcontroller.
During power-up, the Under
Voltage Lockout (UVLO) feature
prevents the application of
insufficient gate voltage to the
IGBT, by forcing the
HCPL-316J’s output low. Once
the output is in the high state, the
DESAT (VCE) detection feature of
the HCPL-316J provides IGBT
protection. Thus, UVLO and
DESAT work in conjunction to
provide constant IGBT
protection.
SHIELD
DESAT
FAULT
UVLO
OUTPUT IC
SHIELD
INPUT IC
RESET
5
FAULT
6
VIN+
1
VIN-
2
VCC1
3
VCC2
13
12
VOUT
11
VEE
9,10
VE
16
DESAT
14
VC
VLED2+
GND1
15
4
VLED1-
7
8
VLED1+
LED2
LED1
D
R
I
V
E
R


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