5–1

FEATURES

•

•

600/700/800 V Blocklng Voltage

•

300 mA On-State Current

•

High Static dv/dt 10,000 V/

µsec., typical

•

Inverse Parallel SCRs Provide Commutating

dv/dt >10 KV/

µsec

•

Very Low Leakage <10

µA

•

Isolation Test Voltage from Double Molded

•

Package, 6-Pln DIP

•

Underwriters Lab File #E52744

DESCRIPTION

The IL421x consists of an AlGaAs IRLED optically

coupled to a pair of photosensitive non-zero crossing

SCR chips and are connected inversely parallel to

form a TRIAC. These three semiconductors are

assembled in a six pin 0.3 inch dual in-line package,

using high insulation double molded, over/under lead-

frame construction.

High input sensitivity is achieved by using an emitter

follower phototransistor and a cascaded SCR pre-

driver resulting in an LED trigger current of less than

1.3 mA (DC).

The IL421x uses two discrete SCRs resulting in a

commutating dv/dt of greater than 10KV/

µs. The use

of a proprietary dv/dt clamp results in a static dv/dt of

greater than 10KV/

µs. This clamp circuit has a MOS-

FET that is enhanced when high dv/dt spikes occur

between MT1 and MT2 of the TRIAC. The FET clamps

the base of the phototransistor when conducting, dis-

abling the internal SCR predriver.

The blocking voltage of up to 800 V permits control of

off-line voltages up to 240 VAC, with a safety factor of

more than two, and is sufficient for as much as 380

VAC. Current handling capability is up to 300 mA

RMS, continuous at 25

°C.

The IL421x isolates low-voltage logic from 120, 240,

and 380 VAC lines to control resistive inductive, or

capacitive loads including motors solenoids, high cur-

rent thyristors or TRIAC and relays.

Applications include solid-state relays, industrial con-

trols, office equipment, and consumer appliances.

Maximum Ratings

Emitter

Reverse Voltage ...................................................................................6 V

Forward Current ..............................................................................60 mA

Surge Current ....................................................................................2.5 A

Power Dissipation.........................................................................100 mW

Derate Linearly from 25

°C......................................................1.33 mW/°C

Thermal Resistance....................................................................750

°C/W

Detector

Peak Off-State Voltage

IL4216 ...........................................................................................600 V

IL4217 ...........................................................................................700 V

IL4218 ...........................................................................................800 V

RMS On-State Current...................................................................300 mA

Single Cycle Surge...............................................................................3 A

Total Power Dissipation ................................................................500 mW

Derate Linearly from 25

°C........................................................6.6 mW/°C

Thermal Resistance.....................................................................150

°C/W

Package

Storage Temperature......................................................–55

°C to +150°C

Operating Temperature ..................................................–55

°C to +100°C

Lead Soldering Temperature................................................ 260

°C/5 sec.

Isolation Resistance

12

Ω

11

Ω

Dimensions in inches (mm)

.010 (.25)

.014 (.35)

.110 (2.79)

.150 (3.81)

.130 (3.30)

.150 (3.81)

.020 (.051) min.

.300 (7.62)

typ.

.031 (0.80)

.035 (0.90)

.100 (2.54) typ.

.039

(1.00)

min.

.018 (0.45)

.022 (0.55)

.248 (6.30)

.256 (6.50)

.335 (8.50)

.343 (8.70)

Pin One ID.

6

5

4

1

2

3

18

° typ.

.300 (7.62)

.347 (8.82)

4

°

typ.

1

2

3

6

5

4

Triac

Anode 1

Triac

Anode 2

Substrate

do not

connect

LED

Anode

LED

Cathode

NC

600 V

IL4216

700 V

IL4217

800 V

IL4218

TRIAC DRIVER OPTOCOUPLER