Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

HCPL-5300 Arkusz danych(PDF) 8 Page - AVAGO TECHNOLOGIES LIMITED

Numer części HCPL-5300
Szczegółowy opis  Intelligent Power Module and Gate Drive Interface Hermetically Sealed Optocouplers
Download  15 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  AVAGO [AVAGO TECHNOLOGIES LIMITED]
Strona internetowa  http://www.avagotech.com
Logo AVAGO - AVAGO TECHNOLOGIES LIMITED

HCPL-5300 Arkusz danych(HTML) 8 Page - AVAGO TECHNOLOGIES LIMITED

Back Button HCPL-5300 Datasheet HTML 4Page - AVAGO TECHNOLOGIES LIMITED HCPL-5300 Datasheet HTML 5Page - AVAGO TECHNOLOGIES LIMITED HCPL-5300 Datasheet HTML 6Page - AVAGO TECHNOLOGIES LIMITED HCPL-5300 Datasheet HTML 7Page - AVAGO TECHNOLOGIES LIMITED HCPL-5300 Datasheet HTML 8Page - AVAGO TECHNOLOGIES LIMITED HCPL-5300 Datasheet HTML 9Page - AVAGO TECHNOLOGIES LIMITED HCPL-5300 Datasheet HTML 10Page - AVAGO TECHNOLOGIES LIMITED HCPL-5300 Datasheet HTML 11Page - AVAGO TECHNOLOGIES LIMITED HCPL-5300 Datasheet HTML 12Page - AVAGO TECHNOLOGIES LIMITED Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 15 page
background image
8
LED Drive Circuit Considerations For Ultra High CMR
Performance
Without a detector shield, the dominant cause of opto-
coupler CMR failure is capacitive coupling from the
input side of the optocoupler, through the package, to
the detector IC as shown in Figure 14. The HCPL-530X
improves CMR performance by using a detector IC with
an optically transparent Faraday shield, which diverts
the capacitively coupled current away from the sensitive
IC circuitry. However, this shield does not eliminate the
capacitive coupling between the LED and the optocoupler
output pins and output ground as shown in Figure 15.
This capacitive coupling causes perturbations in the LED
current during common mode transients and becomes
the major source of CMR failures for a shielded opto-
coupler. The main design objective of a high CMR LED
drive circuit becomes keeping the LED in the proper state
(on or off ) during common mode transients. For example,
the recommended application circuit (Figure 13), can
achieve 10 kV/
s CMR while minimizing component com-
plexity. Note that a CMOS gate is recommended in Figure
13 to keep the LED off when the gate is in the high state.
Another cause of CMR failure for a shielded optocoupler
is direct coupling to the optocoupler output pins through
CLEDO1 and CLEDO2 in Figure 15. Many factors influence the
effect and magnitude of the direct coupling including: the
use of an internal or external output pull-up resistor, the
position of the LED current setting resistor, the connec-
tion of the unused input package pins, and the value of
the capacitor at the optocoupler output (CL).
Techniques to keep the LED in the proper state and
minimize the effect of the direct coupling are discussed in
the next two sections.
CMR With The LED On (CMRL)
A high CMR LED drive circuit must keep the LED on during
common mode transients. This is achieved by overdriv-
ing the LED current beyond the input threshold so that
it is not pulled below the threshold during a transient.
The recommended minimum LED current of 10 mA
provides adequate margin over the maximum ITH of
5.0 mA (see Figure 1) to achieve 10 kV/
s CMR. Capacitive
coupling is higher when the internal load resistor is used
(due to CLEDO2) and an IF = 16 mA is required to obtain
10 kV/
s CMR.
The placement of the LED current setting resistor affects
the ability of the drive circuit to keep the LED on during
transients and interacts with the direct coupling to the
optocoupler output. For example, the LED resistor in
Figure 16 is connected to the anode. Figure 17 shows the
AC equivalent circuit for Figure 16 during common mode
transients. During a +dVCM/dt in Figure 17, the current
available at the LED anode (ITOTAL) is limited by the series
resistor. The LED current (IF) is reduced from its DC value
by an amount equal to the current that flows through
CLEDP and CLEDO1. The situation is made worse because
the current through CLEDO1 has the effect of trying to pull
the output high (toward a CMR failure) at the same time
the LED current is being reduced. For this reason, the rec-
ommended LED drive circuit (Figure 13) places the current
setting resistor in series with the LED cathode. Figure 18
is the AC equivalent circuit for Figure 13 during common
mode transients. In this case, the LED current is not
reduced during a +dVCM/dt transient because the current
flowing through the package capacitance is supplied by
the power supply. During a -dVCM/dt transient, however,
the LED current is reduced by the amount of current
flowing through CLEDN. But better CMR performance is
achieved since the current flowing in CLEDO1 during a
negative transient acts to keep the output low.
Coupling to the LED and output pins is also affected by the
connection of pins 1 and 4. If CMR is limited by perturba-
tions in the LED on current, as it is for the recommended
drive circuit (Figure 13), pins 1 and 4 should be connected
to the input circuit common. However, if CMR perfor-
mance is limited by direct coupling to the output when the
LED is off, pins 1 and 4 should be left unconnected.


Podobny numer części - HCPL-5300

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Agilent(Hewlett-Packard...
HCPL-5300 HP-HCPL-5300 Datasheet
267Kb / 14P
   Intelligent Power Module and Gate Drive Interface Optocouplers
HCPL-5300 HP-HCPL-5300 Datasheet
261Kb / 16P
   Intelligent Power Module and Gate Drive Interface Hermetically Sealed Optocouplers
logo
AVAGO TECHNOLOGIES LIMI...
HCPL-5300 AVAGO-HCPL-5300 Datasheet
374Kb / 21P
   Intelligent Power Module and Gate Drive Interface Optocouplers
logo
Broadcom Corporation.
HCPL-5300 BOARDCOM-HCPL-5300 Datasheet
1Mb / 16P
   Intelligent Power Module and Gate Drive Interface Hermetically Sealed Optocouplers
logo
Agilent(Hewlett-Packard...
HCPL-5300-100 HP-HCPL-5300-100 Datasheet
261Kb / 16P
   Intelligent Power Module and Gate Drive Interface Hermetically Sealed Optocouplers
More results

Podobny opis - HCPL-5300

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Agilent(Hewlett-Packard...
HCPL-5300 HP-HCPL-5300 Datasheet
261Kb / 16P
   Intelligent Power Module and Gate Drive Interface Hermetically Sealed Optocouplers
logo
Broadcom Corporation.
HCPL-5300 BOARDCOM-HCPL-5300 Datasheet
1Mb / 16P
   Intelligent Power Module and Gate Drive Interface Hermetically Sealed Optocouplers
logo
AVAGO TECHNOLOGIES LIMI...
HCPL-4506-500E AVAGO-HCPL-4506-500E Datasheet
374Kb / 21P
   Intelligent Power Module and Gate Drive Interface Optocouplers
logo
Agilent(Hewlett-Packard...
HCPL-4506 HP-HCPL-4506 Datasheet
267Kb / 14P
   Intelligent Power Module and Gate Drive Interface Optocouplers
logo
AVAGO TECHNOLOGIES LIMI...
HCPL-0466-500E AVAGO-HCPL-0466-500E Datasheet
374Kb / 21P
   Intelligent Power Module and Gate Drive Interface Optocouplers
HCPL-J456 AVAGO-HCPL-J456 Datasheet
374Kb / 21P
   Intelligent Power Module and Gate Drive Interface Optocouplers
HCPL-0466-560E AVAGO-HCPL-0466-560E Datasheet
374Kb / 21P
   Intelligent Power Module and Gate Drive Interface Optocouplers
HCPL-4506 AVAGO-HCPL-4506 Datasheet
359Kb / 21P
   Intelligent Power Module and Gate Drive Interface Optocouplers
HCPL-J456-000E AVAGO-HCPL-J456-000E Datasheet
374Kb / 21P
   Intelligent Power Module and Gate Drive Interface Optocouplers
HCPL-4506-000E AVAGO-HCPL-4506-000E Datasheet
374Kb / 21P
   Intelligent Power Module and Gate Drive Interface Optocouplers
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com