DS3668N

DS3668 DS3668 Quad Fault Protected Peripheral Driver Literature Number: SNLS351A DS3668 Quad Fault Protected Peripheral Driver General Description Applications The DS3668 quad peripheral driver is designed for those applications where low operating power, high breakdown voltage, high output current and low output ON voltage are required. Unlike most peripheral drivers available, a unique fault protected circuit is incorporated on each output. When the load current exceeds 1.0A (approximately) on any output for more than a built-in delay time, nominally 12 µs, that output will be shut off by its protection circuitry with no effect on other outputs. This condition will prevail until that protection circuitry is reset by toggling the corresponding input or the enable pin low for at least 1.0 µs. This built-in delay is provided to ensure that the protection circuitry is not triggered by turn-on surge currents associated with certain kinds of loads. The DS3668’s inputs combine TTL compatibility with high input impedance. In fact, its extreme low input current allows it to be driven directly by a MOS device. The outputs are capable of sinking 600 mA each and offer a 70V breakdown. However, for inductive loads the output should be clamped to 35V or less to avoid latch up during turn off (inductive fly-back protection — refer AN-213). An on-chip clamp diode capable of handling 800 mA is provided at each output for this purpose. In addition, the DS3668 incorporates circuitry that guarantees glitch-free power up or down operation and a fail-safe feature which puts the output in a high impedance state when the input is open. The molded package is specifically constructed to allow increased power dissipation over conventional packages. The four ground pins are directly connected to the device chip with a special copper lead frame. When the quad driver is soldered into a PC board, the power rating of the device improves significantly. n n n n n n n n n Relay drivers Solenoid drivers Hammer drivers Stepping motor drivers Triac drivers LED drivers High current, high voltage drivers Level translators Fiber optic LED drivers Features n n n n n n n n n n n n n n n Output fault protection High impedance TTL compatible inputs High output current — 600 mA per output No output latch-up at 35V Low output ON voltage (550 mV typ @ 600 mA) High breakdown voltage (70V) Open collector outputs Output clamp diodes for inductive fly-back protection NPN inputs for minimal input currents (1 µA typical) Low operating power Standard 5V power supply Power up/down protection Fail-safe operation 2W power package Pin-for-pin compatible with SN75437 Connection Diagram Dual-In-Line Package DS005225-1 Top View Order Number DS3668N See NS Package Number N16E © 2001 National Semiconductor Corporation DS005225 www.national.com DS3668 Quad Fault Protected Peripheral Driver January 2001 DS3668 Truth Table IN EN H H OUT L L H Z H L Z L L Z H = High state L = Low state Z = High impedance state www.national.com 2 Storage Temperature Range Lead Temperature (Soldering, 4 seconds) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Input Voltage Output Voltage Continuous Power Dissipation @ 25˚C Free-Air (Note 5) −65˚C to +150˚C 260 Operating Conditions 7.0V 15V 70V Min Max Supply Voltage 3.00 5.25 Units V Ambient Temperature −40 125 ˚C 2075 mW Electrical Characteristics (Notes 2, 3, 6) Symbol Parameter Conditions Max Units 0.8 V 1.0 20 µA ± 10 µA II = −12 mA −0.8 −1.5 V IL = 300 mA 0.2 0.7 V IL = 600 mA (Note 4) 0.55 VIH Input High Voltage VIL Input Low Voltage IIH Input High Current IIL Input Low Current VIN = 0.4V VIK Input Clamp Voltage VOL Output Low Voltage ICEX Output Leakage Current VCE = 70V, VIN = 0.8V Typ 2.0 VIN = 5.25V, VCC = 5.25V VF Diode Forward Voltage IF = 800 mA IR Diode Leakage Current VR = 70V ICC Supply Current ITH Min V 1.2 All Inputs High 62 All Inputs Low 20 Protection Circuit Threshold Current 1.5 V 100 µA 1.6 V 100 µA 80 mA mA 1 1.4 A Typ Max Units Switching Characteristics (Notes 2, 6) Symbol Parameter Conditions Min tPHL Turn On Delay RL = 60Ω, VL = 30V 0.3 1.0 µs tPLH Turn Off Delay RL = 60Ω, VL = 30V 2 10.0 µs tFZ Protection Enable Delay (after Detection of Fault) 6 tRL Input Low Time for Protection Circuit Reset 1.0 12 µs µs Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of actual device operation. Note 2: Unless otherwise specified, min/max limits apply across the 0˚C to +70˚C temperature range and the 4.75V to 5.25V power supply range. All typical values are for TA = 25˚C and VCC = 5.0V. Note 3: All currents into device pins are shown as positive; all currents out of device pins are shown as negative; all voltages are referenced to ground, unless otherwise specified. All values shown as max or min are so classified on absolute value basis. Note 4: All sectors of this quad circuit may conduct rated current simultaneously, however, power dissipation averaged over a short interval of time must fall within specified continuous dissipation ratings. Note 5: For operation over 25˚C free-air temperature, derate linearly to 1328 mW @ 70˚C @ the rate of 16.6 mW/˚C. Note 6: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. 3 www.national.com DS3668 Absolute Maximum Ratings (Note 1) DS3668 AC Test Circuit Switching Waveforms DS005225-3 DS005225-2 Typical Application DS005225-4 Protection Circuit Block Diagram DS005225-5 www.national.com 4 DS3668 Quad Fault Protected Peripheral Driver Physical Dimensions inches (millimeters) unless otherwise noted Molded Dual-In-Line Package (N) Order Number DS3668N NS Package Number N16E LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 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