SN75372 DUAL MOSFET DRIVER SLLS025A - JULY 1986 * * * Dual Circuits Capable of Driving High-Capacitance Loads at High Speeds Output Supply Voltage Range up to 24 V Low Standby Power Dissipation D OR P PACKAGE (TOP VIEW) 1A E 2A GND description The SN75372 is a dual NAND gate interface circuit designed to drive power MOSFETs from TTL inputs. It provides high current and voltage levels necessary to drive large capacitive loads at high speeds. The device operates from a VCC1 of 5 V and a VCC2 of up to 24 V. The SN75372 is characterized for operation from 0C to 70C. 1 8 2 7 3 6 4 5 VCC1 1Y 2Y VCC2 logic symbol E 1A 2A 2 1 EN TTL/MOS 3 7 6 1Y 2Y This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. schematic (each driver) VCC1 VCC2 To Other Driver Input A Output Y Enable E GND To Other Driver Copyright 1986, Texas Instruments Incorporated Revision Information PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3-1 SN75372 DUAL MOSFET DRIVER SLLS025A - JULY 1986 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage range, VCC1 (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5 V to 7 V Supply voltage range, VCC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5 V to 25 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Peak output current, VO (tw < 10 ms, duty cycle < 50%) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mA Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to 150C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260C Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: Voltage values are with respect to network GND. DISSIPATION RATING TABLE PACKAGE TA = 25C POWER RATING DERATING FACTOR ABOVE TA = 25C TA = 70C POWER RATING D 725 mW 5.8 mW/C 464 mW P 1000 mW 8.0 mW/C 640 mW recommended operating conditions MIN NOM MAX UNIT Supply voltage, VCC1 4.75 5 5.25 V Supply voltage, VCC2 4.75 20 24 V High-level input voltage, VIH 2 Low-level input voltage, VIL High-level output current, IOH Low-level output current, IOL Operating free-air temperature, TA 3-2 0 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 V 0.8 V - 10 mA 40 mA 70 C SN75372 DUAL MOSFET DRIVER SLLS025A - JULY 1986 electrical characteristics over recommended ranges of VCC1, VCC2, and operating free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS VIK Input clamp voltage II = - 12 mA VIL = 0.8 V, VOH High level output voltage High-level VOL Low-level output voltage VCC2 = 15 V to 24 V, IOL = 40 mA VF diode forward voltage Output clamp clamp-diode VI = 0 0, II Input current at maximum input voltage VI = 5 5.5 5V IIH High level input current High-level IIL Low level input current Low-level ICC1(H) Supply current from VCC1, both outputs high ICC2(H) Supply current from VCC2, both outputs high ICC1(L) Supply current from VCC1, both outputs low ICC2(L) Supply current from VCC2, both outputs low ICC2(S) Supply current from VCC2, standby condition IOH = - 50 A IOH = - 10 mA VIL = 0.8 V, VIH = 2 V, Any A Any E Any A Any E MIN VCC2 - 1.3 VCC2 - 2.5 TYP MAX UNIT - 1.5 V VCC2 - 0.8 VCC2 - 1.8 IOL = 10 mA VIH = 2 V, V 0.15 0.3 0.25 0.5 IF = 20 mA 15 1.5 1 40 VI = 2 2.4 4V 80 VI = 0 0.4 4V VCC1 = 5.25 V,, All inputs at 0 V, VCC2 = 24 V,, No load VCC1 = 5.25 V,, All inputs at 5 V, VCC2 = 24 V,, No load VCC1 = 0, All inputs at 5 V, VCC2 = 24 V, No load V V mA A -1 - 1.6 -2 - 3.2 2 4 mA 0.5 mA 16 24 mA 7 13 mA 0.5 mA mA All typical values are at VCC1 = 5 V, VCC2 = 20 V, and TA = 25C. switching characteristics, VCC1 = 5 V, VCC2 = 20 V, TA = 25C PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tDLH tDHL Delay time, low-to-high-level output 20 35 ns Delay time, high-to-low-level output 10 20 ns tTLH tTHL Transition time, low-to-high-level output 20 30 ns 20 30 ns tPLH tPHL Propagation delay time, low-to-high-level output 10 40 65 ns Propagation delay time, high-to-low-level output 10 30 50 ns CL = 390 pF, pF Transition time, high-to-low-level output POST OFFICE BOX 655303 RD = 10 , * DALLAS, TEXAS 75265 See Figure 1 3-3 SN75372 DUAL MOSFET DRIVER SLLS025A - JULY 1986 PARAMETER MEASUREMENT INFORMATION 10 ns 10 ns 5V 20 V VCC1 VCC2 3V Input 10% Input 90% 1.5 V 90% 1.5 V tPHL Pulse Generator (see Note A) RD 0V tPHL tDHL Output CL = 390 pF (see Note B) GND 10% 0.5 s tTLH tTHL VCC2 - 3 V Output 2V 2.4 V VOH VCC2 - 3 V tDLH 2V VOL VOLTAGE WAVEFORMS TEST CIRCUIT NOTES: A. The pulse generator has the following characteristics: PRR = 1 MHz, ZO 50 . B. CL includes probe and jig capacitance. Figure 1. Test Circuit and Voltage Waveforms, Each Driver TYPICAL CHARACTERISTICS LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT 0.5 VCC1 = 5 V VCC2 = 20 V VI = 0.8 V VCC2 - 0.5 VCC2 - 1 VOL VOL - Low-Level Output Voltage - V VV0H OH - High-Level Output Voltage - V VCC2 TA = 25C TA = 70C VCC2 - 1.5 VCC2 - 2 TA = 0C VCC2 - 2.5 VCC2 - 3 - 0.01 VCC1 = 5 V VCC2 = 20 V VI = 2 V 0.4 TA = 70C 0.3 TA = 0C 0.2 0.1 0 - 0.1 -1 -10 -100 0 IOH - High-Level Output Current - mA 40 Figure 3 POST OFFICE BOX 655303 60 80 IOL - Low-Level Output Current - mA Figure 2 3-4 20 * DALLAS, TEXAS 75265 100 SN75372 DUAL MOSFET DRIVER SLLS025A - JULY 1986 TYPICAL CHARACTERISTICS POWER DISSIPATION (BOTH DRIVERS) vs FREQUENCY VOLTAGE TRANSFER CHARACTERISTICS 1200 24 VV) O - Output Voltage - V 20 P PT D - Power Dissipation - mW VCC1 = 5 V VCC2 = 20 V No Load TA = 25C 16 12 8 VCC1 = 5 V VCC2 = 20 V Input: 3-V Square Wave 50% Duty Cycle TA = 25C 1000 800 CL = 600 pF CL = 1000 pF 600 CL = 2000 pF 400 CL = 4000 pF 200 4 CL = 400 pF Allowable in P Package Only 0 0 0 0.5 1 1.5 2 10 2.5 20 40 VI - Input Voltage - V Figure 4 180 180 CL = 4000 pF t PHL - Propagation Delay Time, kSVR High-to-Low-Level Output - ns tkSVR PLH - Propagation Delay Time, Low-to-High-Level Output - ns 200 160 VCC1 = 5 V VCC2 = 20 V RD = 10 See Figure 1 CL = 2000 pF 100 80 CL = 1000 pF 60 CL = 200 pF 40 CL = 390 pF 1000 VCC1 = 5 V VCC2 = 20 V RD = 10 See Figure 1 160 CL = 4000 pF 140 120 CL = 2000 pF 100 80 CL = 1000 pF 60 CL = 200 pF 40 CL = 390 pF 20 20 CL = 50 pF 0 400 PROPAGATION DELAY TIME, HIGH-TO-LOW-LEVEL OUTPUT vs FREE-AIR TEMPERATURE 200 120 200 Figure 5 PROPAGATION DELAY TIME, LOW-TO-HIGH-LEVEL OUTPUT vs FREE-AIR TEMPERATURE 140 100 f - Frequency - kHz 0 10 20 30 40 50 60 TA - Free-Air Temperature - C 70 80 0 CL = 50 pF 0 10 20 30 40 50 60 70 80 TA - Free-Air Temperature - C Figure 6 Figure 7 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3-5 SN75372 DUAL MOSFET DRIVER SLLS025A - JULY 1986 TYPICAL CHARACTERISTICS PROPAGATION DELAY TIME, HIGH-TO-LOW-LEVEL OUTPUT vs VCC2 SUPPLY VOLTAGE PROPAGATION DELAY TIME, LOW-TO-HIGH-LEVEL OUTPUT vs VCC2 SUPPLY VOLTAGE 200 200 VCC1 = 5 V RD = 10 TA = 25C See Figure 1 140 120 CL = 2000 pF 100 80 CL = 1000 pF 60 CL = 200 pF 40 CL = 390 pF High-to-Low-Level Output - ns 160 VCC1 = 5 V RD = 10 TA = 25C See Figure 1 180 CL = 4000 pF t PLH - Propagation Delay Time, t PLH - Propagation Delay Time, Low-to-High-Level Output - ns 180 20 160 CL = 4000 pF 140 120 CL = 2000 pF 100 80 CL = 1000 pF 60 40 CL = 200 pF 20 CL = 50 pF CL = 50 pF 0 0 0 5 10 15 20 VCC2 - Supply Voltage - V 25 0 5 10 15 20 VCC2 - Supply Voltage - V Figure 8 PROPAGATION DELAY TIME, HIGH-TO-LOW-LEVEL OUTPUT vs LOAD CAPACITANCE 200 200 VCC1 = 5 V VCC2 = 20 V TA = 25C See Figure 1 160 140 RD = 24 120 RD = 10 100 80 RD = 0 60 VCC1 = 5 V VCC2 = 20 V TA = 25C See Figure 1 180 t PLH - Propagation Delay Time, kSVR High-to-Low-Level Output - ns t PLH - Propagation Delay Time, kSVR Low-to-High-Level Output - ns 180 40 160 140 RD = 24 120 100 RD = 10 80 60 RD = 0 40 20 20 0 0 1000 2000 3000 CL - Load Capacitance - pF 4000 0 Figure 10 1000 2000 3000 CL - Load Capacitance - pF Figure 11 NOTE: For RD = 0, operation with CL > 2000 pF violates absolute maximum current rating. 3-6 25 Figure 9 PROPAGATION DELAY TIME, LOW-TO-HIGH-LEVEL OUTPUT vs LOAD CAPACITANCE 0 CL = 390 pF POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 4000 SN75372 DUAL MOSFET DRIVER SLLS025A - JULY 1986 THERMAL INFORMATION power dissipation precautions Significant power may be dissipated in the SN75372 driver when charging and discharging high-capacitance loads over a wide voltage range at high frequencies. Figure 5 shows the power dissipated in a typical SN75372 as a function of load capacitance and frequency. Average power dissipated by this driver is derived from the equation PT(AV) = PDC(AV) + PC(AV) = PS(AV) where PDC(AV) is the steady-state power dissipation with the output high or low, PC(AV) is the power level during charging or discharging of the load capacitance, and PS(AV) is the power dissipation during switching between the low and high levels. None of these include energy transferred to the load, and all are averaged over a full cycle. The power components per driver channel are tHL P t + PL t L PDC(AV) = H H T P C(AV) [ C V2C PS(AV) = tLH f tH PLH t LH + PHL t HL T tL T = 1/f where the times are as defined in Figure 14. Figure 12. Output Voltage Waveform PL, PH, PLH, and PHL are the respective instantaneous levels of power dissipation, C is the load capacitance. VC is the voltage across the load capacitance during the charge cycle shown by the equation VC = VOH - VOL PS(AV) may be ignored for power calculations at low frequencies. In the following power calculation, both channels are operating under identical conditions: VOH =19.2 V and VOL = 0.15 V with VCC1 = 5 V, VCC2 = 20 V, VC = 19.05 V, C = 1000 pF, and the duty cycle = 60%. At 0.5 MHz, PS(AV) is negligible and can be ignored. When the output voltage is high, ICC2 is negligible and can be ignored. ) ) ) On a per-channel basis using data sheet values, P DC(AV) + (20 V) 0 mA 2 (5 V) 2 mA 2 (0.6) (5 V) 16 mA 2 (20 V) 7 mA 2 (0.4) PDC(AV) = 47 mW per channel Power during the charging time of the load capacitance is PC(AV) = (1000 pF) (19.05 V)2 (0.5 MHz) = 182 mW per channel Total power for each driver is PT(AV) = 47 mW + 182 mW = 229 mW and total package power is PT(AV) = (229) (2) = 458 mW. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3-7 SN75372 DUAL MOSFET DRIVER SLLS025A - JULY 1986 APPLICATION INFORMATION driving power MOSFETs The drive requirements of power MOSFETs are much lower than comparable bipolar power transistors. The input impedance of a FET consists of a reverse biased PN junction that can be described as a large capacitance in parallel with a very high resistance. For this reason, the commonly used open-collector driver with a pullup resistor is not satisfactory for high-speed applications. In Figure 12(a), an IRF151 power MOSFET switching an inductive load is driven by an open-collector transistor driver with a 470- pullup resistor. The input capacitance (Ciss) specification for an IRF151 is 4000 pF maximum. The resulting long turn-on time due to the combination of Ciss and the pullup resistor is shown in Figure 12(b). M 5V 470 4 7 8 1/2 SN75447 3 TLC555P 6 5 2 1 IRF151 V0H V V OL - Gate Voltage - V OH - VOL 48 V 4 3 2 1 0 0 0.5 1 1.5 Figure 13. Power MOSFET Drive Using SN75447 3-8 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 2.5 t - Time - s (b) (a) 2 3 SN75372 DUAL MOSFET DRIVER SLLS025A - JULY 1986 APPLICATION INFORMATION A faster, more efficient drive circuit uses an active pullup as well as an active pulldown output configuration, referred to as a totem-pole output. The SN75372 driver provides the high speed, totem-pole drive desired in an application of this type, see Figure 13(a). The resulting faster switching speeds are shown in Figure 13(b). 48 V M 4 8 7 3 TLC555P IRF151 5 6 2 1/2 SN75372 1 V0H V V OL - Gate Voltage - V OH - VOL 5V 4 3 2 1 0 0 0.5 1 1.5 2 2.5 3 t - Time - s (b) (a) Figure 14. Power MOSFET Drive Using SN75372 Power MOSFET drivers must be capable of supplying high peak currents to achieve fast switching speeds as shown by the equation I pk + VC tr where C is the capacitive load, and tr is the desired drive time. V is the voltage that the capacitance is charged to. In the circuit shown in Figure 13(a), V is found by the equation V = VOH - VOL Peak current required to maintain a rise time of 100 ns in the circuit of Figure 13(a) is I PK * 0)4(10*9) + 120 mA + (3 100(10 *9) Circuit capacitance can be ignored because it is very small compared to the input capacitance of the IRF151. With a VCC of 5 V, and assuming worst-cast conditions, the gate drive voltage is 3 V. For applications in which the full voltage of VCC2 must be supplied to the MOSFET gate, the SN75374 quad MOSFET driver should be used. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3-9 3-10 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current and complete. 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