SG1644 SG2644 SG3644
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SG1644/SG2644/SG3644
DUAL HIGH SPEED DRIVER
SG1644, 2644, 3644 dual non-inverting monolithic high speed driver. This device utilizes high voltage Schottky logic convert signals high speed outputs 18V. totem pole outputs have peak current capability, which enables them drive 1000pF loads typically less than 25ns. These speeds make ideal driving power MOSFETs other large capacitive loads requiring high speed switching. addition standard packages, Silicon General offers S.O.I.C. (DW-package) commercial industrial applications, Hermetic TO-66 (R-package) military use. These packages offer improved thermal performance applications requiring high frequencies and/or high peak currents.
FEATURES
Totem pole outputs with 3.0A peak current capability. Supply voltage 22V. Rise fall times less than 25ns. Propagation delays less than 20ns. Non-inverting high-speed high-voltage Schottky logic. Efficient operation high frequency. Available Plastic Ceramic Ceramic Plastic S.O.I.C. TO-99 TO-66
HIGH RELIABILITY FEATURES SG1644
Available MIL-STD-883 Radiation data available level processing available
EQUIVALENT CIRCUIT SCHEMATIC
6.5V VREG
2.5K
INV. INPUT
OUTPUT
LOGIC (Substrate)
POWER
9/91 6/97
Copyright 1997
11861 Western Avenue Garden Grove, 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG1644/SG2644/SG3644
ABSOLUTE MAXIMUM RATINGS (Note
Supply Voltage (VCC) Logic Input Voltage Source/Sink Output Current (Each Output) Continuous ±0.5A Pulse, 500ns ±3.0A Operating Junction Temperature Hermetic R-Packages) 150°C Plastic L-Packages) 150°C Storage Temperature Range -65°C 150°C Lead Temperature (Soldering, Seconds) 300°C
Note Exceeding these ratings could cause damage device. voltages with respect ground. currents positive into specified terminal.
THERMAL DATA
Package: Thermal Resistance-Junction Case, 30°C/W Thermal Resistance-Junction Ambient, 80°C/W Package: Thermal Resistance-Junction Case, 50°C/W Thermal Resistance-Junction Ambient, 130°C/W Package: Thermal Resistance-Junction Case, 60°C/W Thermal Resistance-Junction Ambient, 95°C/W Package: Thermal Resistance-Junction Case, 40°C/W Thermal Resistance-Junction Ambient, 95°C/W Package: Thermal Resistance-Junction Case, 25°C/W Thermal Resistance-Junction Ambient, 130°C/W Package: Thermal Resistance-Junction Case, 5.0°C/W Thermal Resistance-Junction Ambient, 40°C/W Package: Thermal Resistance-Junction Case, 35°C/W Thermal Resistance-Junction Ambient, 120°C/W
Note Junction Temperature Calculation: JA). Note above numbers maximums limiting thermal resistance package standard mounting configuration. numbers meant guidelines thermal performance device/pc-board system. above assume ambient airflow.
RECOMMENDED OPERATING CONDITIONS
(Note
Supply Voltage (VCC) 4.5V (Note Frequency Range 1.5MHz Peak Pulse Current Logic Input Voltage -0.5 5.5V
Note Range over which device functional. Note performance been optimized 20V.
Operating Ambient Temperature Range (TA) SG1644 -55°C 125°C SG2644 -25°C 85°C SG3644 70°C
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specfiications apply over operating ambient temperatures SG1644 with -55°C 125°C, SG2644 with -25°C 85°C, SG3644 with 70°C, 20V. duty cycle pulse testing techniques used which maintains junction case temperatures equal ambient temperature.)
Parameter Static Characteristics Logic Input Voltage Logic Input Voltage Input High Current Input High Current Input Current Input Clamp Voltage Output High Voltage (Note Output Voltage (Note Supply Current Outputs Supply Current Outputs High
Note 20V.
Test Conditions
SG1644/2644/3644 Units Min. Typ. Max.
2.4V 5.5V -10mA IOUT -200mA IOUT 200mA (both inputs) 2.4V (both inputs)
-1.5 VCC-3
9/91 6/97
Copyright 1997
11861 Western Avenue Garden Grove, 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG1644/SG2644/SG3644
ELECTRICAL CHARACTERISTICS
Parameter Dynamic Characteristics (Note Propagation Delay High-Low (TPHL) Propagation Delay Low-High (TPLH) Rise Time (TTLH) Fall Time (TTHL) Supply Current (ICC)
(both outputs) (continued)
SG1644/2644/3644 Test Conditions (Figure
25°C
TA=-55°C 125°C
SG1644
Units
Min. Typ. Max. Min. Typ. Max. 1000pF (Note 2500pF 1000pF (Note 2500pF 1000pF (Note 2500pF 1000pF (Note 2500pF 2500pF, Freq. 200KHz Duty Cycle
Note These parameters, specified 1000pF, although guaranteed over recommended operating conditions, tested production. Note 15V.
TEST CIRCUIT SWITCHING TIME WAVEFORMS FIGURE
CHARACTERISTIC CURVES
FIGURE TRANSITION TIMES SUPPLY VOLTAGE
FIGURE PROPAGATION DELAY SUPPLY VOLTAGE
FIGURE TRANSITION TIMES AMBIENT TEMPERATURE
9/91 6/97
Copyright 1997
11861 Western Avenue Garden Grove, 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG1644/SG2644/SG3644
CHARACTERISTIC CURVES
(continued)
FIGURE PROPAGATION DELAY AMBIENT TEMPERATURE
FIGURE TRANSITION TIMES CAPACITIVE LOAD
FIGURE SUPPLY CURRENT CAPACITANCE LOAD
FIGURE HIGH SIDE SATURATION OUTPUT CURRENT
FIGURE SIDE SATURATION OUTPUT CURRENT
FIGURE SUPPLY CURRENT FREQUENCY
FIGURE SUPPLY CURRENT FREQUENCY
9/91 6/97
Copyright 1997
11861 Western Avenue Garden Grove, 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG1644/SG2644/SG3644
APPLICATION INFORMATION
POWER DISSIPATION SG1644, while more energy-efficient than earlier gold-doped driver IC's, still dissipate considerable power because high peak current capability high frequencies. Total power dissipation specific application will steady-state power dissipation, dissipation caused driving capacitive loads. power dissipation given +VCC where function driver state, hence duty-cycle dependent. power dissipation proportional switching frequency, load capacitance, square output voltage. most applications, driver constantly changing state, contribution becomes dominant when frequency exceeds 100-200KHz. SG1644 driver family available variety packages accommodate wide range operating temperatures power dissipation requirements. Absolute Maximums section data sheet includes graphs designer choosing appropriate package design. designer should first determine actual power dissipation driver referring curves data sheet relating operating current supply voltage, switching frequency, capacitive load. These curves were generated from data taken actual devices. designer then refer Absolute Maximum Thermal Dissipation curves choose package type, determine heat-sinking required. DESIGN EXAMPLE Given: 2500pF loads must driven push-pull from volt supply 100KHz. application commercial which maximum ambient temperature +50°C, cost important. From Figure average driver current consumption under these conditions will 18mA, power dissipation will 15volts 18mA, 270mW. From ambient thermal characteristic curve, seen that package, which 8-pin plastic with copper lead frame, more than enough thermal conductance from junction ambient support operation ambient temperature +50°C. SG36446M driver would specified this application. SUPPLY BYPASSING Since SG1644 deliver peak currents above 3amps under some load conditions, adequate supply bypassing essential proper operation. capacitors parallel recommended guarantee supply impedance over wide bandwidth: 0.1µF ceramic disk capacitor high frequencies, 4.7µF solid tantalum capacitor energy storage. military applications, CK05 CK06 ceramic operator with CSR-13 tantalum capacitor effective combination. commercial applications, low-inductance ceramic disk capacitor teamed with Sprague 150D equivalent capacitor will work well. capacitors must located close physically possible pin, with combined lead board trace lengths held less than inches. GROUNDING CONSIDERATIONS ability SG1644 deliver high peak currents into capacitive loads cause undesirable negative transients logic power grounds. avoid this, inductance ground path should considered each output return high peak currents back it's ground point. ground plane recommended best performance. space ground plane available, make paths short wide possible. logic ground returned supply bypass capacitor connected point power grounds. LOGIC INTERFACE logic input 1644 designed accept standard DCcoupled volt logic swings, with speed-up capacitors required. input signal voltage exceeds volts, input must protected against excessive voltage HIGH state. Either high speed blocking diode must used, resistive divider attenuate logic swing necessary. LAYOUT HIGH SPEED SG1644 generate relatively large voltage excursions with rise fall times around 20-30 nanoseconds with light capacitive loads. Fourier analysis these time domain signals will indicate strong energy components frequencies much higher than basic switching frequency. These high frequencies induce ringing otherwise ideal pulse sufficient inductance occurs signal path (either positive signal trace ground return). Overshoot rising edge undesirable because excess drive voltage could rupture gate oxide power MOSFET. Trailing edge undershoot dangerous because negative voltage excursion forwardbias parasitic substrate diode driver, potentially causing erratic operation outright failure. Ringing reduced eliminated minimizing signal path inductance, using damping resistor between drive output capacitive load. Inductance reduced keeping trace lengths short, trace widths wide, using 2oz. copper possible. resistor value critical damping calculated from: 2L/CL where total signal line inductance, load capacitance. Values between 100ohms usually sufficient. Inexpensive carbon composition resistors best because they have excellent high frequency characteristics. They should located close possible gate terminal power MOSFET.
9/91 6/97
Copyright 1997
11861 Western Avenue Garden Grove, 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG1644/SG2644/SG3644
TYPICAL APPLICATIONS
FIGURE this push pull converter circuit, control capailities SG1524B combined with powerful totem-pole drivers found SG1644 (see SG1626 example). This inexpensive configuration results very fast charge discharge power MOSFET gate capacitance efficient switching.
FIGURE When peak current capabilites PWM's such 1525A 1526B sufficient drive high capacitive loads fast enough, SG1644 solution this problem. This combination especially suited full bridge applications where high input capacitance MOSFETs being used. Diodes necessary leakage inductance drive transformer will drive output pins negative.
9/91 6/97
Copyright 1997
11861 Western Avenue Garden Grove, 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG1644/SG2644/SG3644
TYPICAL APPLICATIONS
(continued)
FIGURE cost, powerful alternative single ended converters with parallel MOSFETs combination SG1842 SG1644 shown Figure This combination will also allow noise operation separating drive associated high peak currents, away from logic section.
FIGURE Fast turn bipolar transistors possible totem pose output stage SG1644. charge capacitor will drive base negative faster turn off.
9/91 6/97
Copyright 1997
FIGURE When inputs driven with square wave drive, high peak current capabilites SG1644 allow easy implementation charge pump voltage converters.
11861 Western Avenue Garden Grove, 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG1644/SG2644/SG3644
CONNECTION DIAGRAMS ORDERING INFORMATION
Package
14-PIN CERAMIC PACKAGE (See Notes Below)
Part SG1644J/883B SG1644J/DESC SG1644J SG2644J SG3644J
Ambient Temperature Range -55°C 125°C -55°C 125°C -55°C 125°C -25°C 85°C 70°C
Connection Diagram
N.C. N.C. N.C. LOGIC
N.C. N.C. N.C.
8-PIN CERAMIC PACKAGE
SG1644Y/883B SG1644Y/DESC SG1644Y SG2644Y SG3644Y SG2644M SG3644M SG2644DW SG3644DW
-55°C 125°C -55°C 125°C -55°C 125°C -25°C 85°C 70°C -25°C 85°C 70°C -25°C 85°C 70°C
LOGIC
8-PIN PLASTIC PACKAGE
16-PIN WIDE BODY PLASTIC S.O.I.C. PACKAGE
N.C. N.C. GROUND GROUND N.C. N.C.
GROUND GROUND
8-PIN TO-99 METAL PACKAGE
SG1644T/883B SG1644T/DESC SG1644T SG2644T SG3644T
-55°C 125°C -55°C 125°C -55°C 125°C -25°C 85°C 70°C
LOGIC
9-PIN TO-66 METAL PACKAGE
SG1644R/883B SG1644R SG2644R SG3644R
-55°C 125°C -55°C 125°C -25°C 85°C 70°C
N.C.
N.C. CASE LOGIC GROUND Note: Case internally connected substrate ground.
(Note
20-PIN CERAMIC (LCC) LEADLESS CHIP CARRIER PACKAGE
SG1644L/883B SG1644L/DESC
-55°C 125°C -55°C 125°C
N.C. N.C. N.C. LOGIC N.C. N.C.
N.C. N.C. N.C. N.C. N.C. N.C.
Note Contact factory DESC product availablity. packages viewed from top. 9/91 6/97
Copyright 1997 11861 Western Avenue Garden Grove, 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
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