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TheL6221monolithicquaddarlingtonswitch isde- signedforhighcurrent,highvoltageswitchingappli- cations.Eachofthefourswitchesiscontrolledbya logicinputandallfourarecontrolledbya common enableinput.AllinputsareTTL-compatiblefordirect connectionto logiccircuits.
Eachswitchconsistsofanopen-collectordarlington transistorplusafastdiodeforswitchingapplications withinductivedeviceloads.Theemittersofthefour- switchesarecommoned.Anynumberofinputsand outputsofthesamedevicemaybeparalleled. Threeversionsareavailable:theL6221Cmounted ina Powerdip12+2+2packageandtheL6221CN mounted in a 15--lead Multiwatt package, the L6221CDin SO16+2+2package.
L6221CD Maximum Ratings
Symbol
Parameter
Value
Unit
VO
Output Voltage
60
V
VS
Logic Supply Voltage
7
V
VIN ,VEN
Input Voltage, Enable Voltage
VS
IC
Continuous Colllector Current (for each channel) for L6221CD
1.8 1.2
A A
IC
Collector Peak Current (repetitive, duty cycle = 10% ton = 5ms) for L6221CD
2.5 1.7
A A
IC
Collector Peak Current (non repetitive, t = 10s) for L6221CD
3.2 2.2
A A
Top
Operating Temperature Range (junction)
-40 to +150
°C
Tstg
Storage Temperature Range
-55 to +150
°C
Isub
Output Substrate Current
350
mA
Ptot
Total Power Dissipation at Tpins =90°C (powerdip) at Tcase =90°C (multiwatt) at Tcase =90°C (SO20) at Tamb =70°C (powerdip) at Tamb =70°C (multiwatt) at Tamb =70°C (SO20)