L6377 0.5A HIGH-SIDE DRIVER INTELLIGENT POWER SWITCH PRODUCT PREVIEW 0.5 A OUTPUT CURRENT 8 TO 35 V SUPPLY VOLTAGE RANGE EXTERNALLY PROGRAMMABLE CURRENT LIMIT NON-DISSIPATIVE OVER-CURRENT PROTECTION THERMAL SHUTDOWN UNDER VOLTAGE LOCKOUT WITH HYSTERESYS DIAGNOSTIC OUTPUT FOR UNDER VOLTAGE, OVER TEMPERATURE AND OVER CURRENT EXTERNAL ASYNCHRONOUS RESET INPUT PRESETTABLE DELAY FOR OVERCURRENT DIAGNOSTIC OPEN GROUND PROTECTION PROTECTION AGAINST SURGE TRANSIENT (IEC 801-5) IMMUNITY AGAINST BURST TRANSIENT (IEC 801-4) ESD PROTECTION (HUMAN BODY MODEL ±2KV) MULTIPOWER BCD TECHNOLOGY SO14 MINIDIP ORDERING NUMBERS: L6377 (MINIDIP) L6377D (SO) DESCRIPTION This device is a monolithic Intelligent Power Switch in Multipower BCD Technology for driving inductive, capacitive or resistive loads. Diagnostic for CPU feedback and extensive use of electrical protections make this device inherently indistructible and suitable for general purpose industrial applications. BLOCK DIAGRAM VS VS CHARGE PUMP GND RS IN+ CURRENT LIMIT + - OVC DRIVER 1.3V OUT UV 1.3V DIAG SHORT CIRCUIT CONTROL + R RSC - OVT UV DELAY ON DELAY C DON D94IN075D February 1996 1/11 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. L6377 ABSOLUTE MAXIMUM RATINGS Symbol Pin Vs 3 Vs - Vout 3 vs 2 V od 5 Iod IRESET 4 Parameter Value Unit Supply Voltage (tw < 10ms) 50 V Supply Voltage (DC) 40 V Supply to Output Differential voltage internally limited Externally Forced Voltage -0.3 to 7 V Externally Forced Current ±1 mA Reset Input Current (forced) ±2 mA -0.3 to 40 V Reset Input Voltage VRESET Iout 2 Vout Output Current (see also Isc) internally limited Output Voltage internally limited E il Total Energy Inductive Load (Tj = 125°C) Ptot Power Dissipation V diag 50 mJ internally limited External voltage -0.3 to 40 V Externally forced current -10 to 10 mA Input Current 20 mA Vi Input Voltage -10 to Vs +0.3 V Top Ambient temperature, operating range -25 to 85 °C Tj Junction temperature, operating range (see Overtemperature Protection) -25 to 125 °C Storage temperature -55 to 150 °C 6 Idiag Ii 7 Tstg PIN CONNECTION (Top view) GND 1 8 RESET OUT 2 7 IN+ VS 3 6 DIAG RSC 4 5 ON DELAY D94IN054D N.C. 1 14 N.C. GND 2 13 RESET OUT 3 12 IN+ VS 4 11 DIAG ON DELAY RSC 5 10 N.C. 6 9 N.C. N.C. 7 8 N.C. D96IN368 2/11 L6377 PIN DESCRIPTION No Pins Description 1 GND Ground pin. 2 OUT High side output. Controlled output with current limitation. 3 VS Supply voltage. Range with under voltage monitoring 4 Rsc Current limiting setting. 5 ON DELAY 6 DIAG 7 IN+ 8 RESET Delay setting for overcurrent diagnostic Diagnostic open drain output for over temperature, under voltage and overcurrent Comparator non inverting input Asynchronous reset input THERMAL DATA Symbol Rth j-amb Parameter Thermal Resistance, Junction Ambient Max. MINIDIP SO14 Unit 100 150 °C/W 3/11 L6377 ELECTRICAL CHARACTERISTICS (Vs = 24V; Tj = -25 to 125°C; unless otherwise specified.) DC OPERATION Symbol Pin Supply Voltage for Valid Diagnostic Vsmin Vs V sth Parameter 3 Test Condition Idiag = >0.5mA; Vdiag = 1.5V; 8 Under Voltage Lower Threshold 7 300 24 500 Max. Unit 35 V 35 V 8 V 700 mV Iq Quiescent Current Output Open 800 µA Iqo Quiescent Current Output On 1.6 mA Vith Input Threshold Voltage 0.8 Viths Input Threshold Hysteresis Input Low Level Voltage V il 7 Input High Level Voltage Vih Input Bias Current Iib Vrth 2 V 50 400 mV -7 0.8 V Vs< 18V 2 Vs -3 V Vs> 18V 2 15 V -250 250 µA 2 V Vi = -7 to 15V 1.3 Reset Threshold Voltage 0.8 Reset Low Level Voltage 0 0.8 V V rh Reset High Level Voltage 2 40 V Irb Reset Pull Down Current Vrl 8 1.3 5 µA Delay Capacitor Charging Current ON DELAY pin shorted to Ground 2.5 µA Output Voltage on Rsc pin Rsc pin floating 1.25 V Output Current on Rsc pin Rsc pin shorted to GND 300 µA Diagnostic Output Leakage Curr. Diagnostic Off 25 µA Vdiag Diagnostic Output Voltage Drop Idiag =5mA; 1.5 V Vdon Output Voltage Drop Idch V rsc 5 4 Irsc Idlkg 6 Iout =625mA; Tj =25°C 250 350 mV Iout =625mA; Tj =125°C 400 550 mV 100 µA 0.8 1.5 V 53 58 V Output Leakage Current Vi = LOW; Vou t=0 Output Low State Voltage Vi = HIGH; pin floating Vcl Internal Voltage Clamp (Vs-Vout) Io=200mA single pulsed =300µs Isc Short Circuit Output Current Iolk Vol 2 48 Vs=8 to 35V; Rl =2Ω; Rsc =5 to 30KΩ Vs=8 to 35V; Rl =2Ω; Rsc <5 KΩ 4/11 Typ. 4 Operative Supply Voltage Under Voltage Hysteresis Vshys Min. 5/R sc = KΩ 0.75 1.1 A 1.5 A Tmax Over Temperature Upper Threshold 150 °C Thys Over Temperature Hysteresis 20 °C L6377 AC OPERATION Symbol Pin Parameter tr -tf td 5 Min. Typ. Vs = 24V; Rl = 70Ω Rl to ground Delay Time 2 dV/dt tON Test Condition Rise or Fall Time Slew Rate (Rise and Fall Edge) Vs = 24V; Rl = 70Ω Rl to ground On time during Short Circuit Condition 50pF < CDON < 2nF 0.7 Max. Unit 20 µs 5 µs 1 1.5 V/µs 1.28 µs/pF tOFF Off time during Short Circuit Condition 64 tON fmax Maximum Operating Frequency 25 kHz SOURCE DRAIN NDMOS DIODE Symbol V fsd Parameter Test Condition Min. Forward On Voltage Ifsd = 625mA Ifp Forward Peak Current tp = 10ms; duty cycle = 20% trr Reverse Recovery Time Ifsd = 500mA; dIfsd/dt = 25A/µs tfr Forward Recovery Time Typ. Max. Unit 1 1.5 V 1.5 A 200 ns 50 ns Figure 1: Undervoltage Comparator Hysteresis Vshys Vsth D94IN126A Vs Figure 2: Switching Waveforms V in 50% 50% td t td Vout 90% 90% 50% 50% 10% 10% tr tf D94IN127A t 5/11 L6377 INPUT SECTION An Input and Asynchronous RESET, both TTL/CMOS compatible with wide voltage range and high noise immunity (thanks to a built in hysteresis) are available. OVER TEMPERATURE PROTECTION (OVT) An on-chip Over Temperature Protection providse an excellent protection of the device in extreme conditions. Whenever the temperature - measured on a central portion of the chip- exceeds Tmax=150 C (typical value) the device is shut off, and the DIAG output goes LOW. Normal operation is resumed as the chip temperature (normally after few seconds) falls below Tmax-Thys= 130 C (typical value). The hysteresis avoid thats an intermittent behaviour take place. UNDER VOLTAGE PROTECTION (UV) The supply voltage is expected to range from 8 to 35 V. In this range the device operates correctly. Below 8 V the overall system has to be considered not reliable. To avoid any misfunctioning the supply voltage is continuously monitored to provide an under voltage protection. As Vs falls below Vsth-Vshys (typically 7.5 V, see fig.1) the output power MOS is switched off and DIAG output goes LOW. Normal operation is resumed as soon as Vs exceeds Vsth. The hysteretic behaviour prevents intermittent operation at low supply voltage. OVER CURRENT OPERATION In order to implement a short circuit protection the output power MOS is driven in linear mode to limit the output current to the Isc value. This Isc limit is externally settable by means of an external 1/4 W resistor connected from Rsc pin and GND. The value of the resistor must be chosen according to the following formula: Isc (A) = 5/Rsc (kohm) with 5 < Rsc < 30 (kohm) For Rsc < 5 (kohm) Isc is limited to Isc=1.1 A (typical value). This condition (current limited to the Isc value) lasts for a Ton time interval, that can be set by means of a capacitor (Cdon) connected to the ON DELAY pin according to the following formula: Ton = 1.28 msec/pF for 50pF<Cdon< 2nF After the Ton interval has expired the output power MOS is switched off for the Toff time interval with: Toff = 64*Ton. Figure 3: Short Circuit Operation Waveforms OUTPUT CURRENT Isc Iout t<tON DIAG (active low) Short Circuit tON tOFF tON Time tOFF Short Circuit D94IN105 6/11 Time L6377 When also the Toff interval has expired, the output power MOS is switched ON. Now two conditions may occur - the overload is still present. In this case the output power MOS is again driven in linear mode (limiting the output current to Isc) for another Ton, starting a new cycle, or - the overload condition is removed, and the output power MOS is no longer driven in linear mode. All these occurrences are presented on the DIAG pin (see fig 2). We call this unique feature Non Dissipative Short Circuit Protection and it ensures a very safe operation even in permanent overload conditions. Note that, of course, choosing the most appropriate value for the Ton interval (i.e. the value of the Cdon capacitor) a delay (the Ton itself) will prevent that a misleading Short Circuit information is presented on the DIAG output, when driving capacitive loads (that acts like short circuit in the very beginning) or Incandescent Lamp (a cold filament has a very low resistive value). The Non Dissipative Short Circuit Protection can be disabled (keeping Ton = 0 but with the output current still limited to Isc, and Diagnostic disabled) simply shorting to ground the the ON DELAY pin. DEMAGNETISATION OF INDUCTIVE LOADS The L6377 has an internal clamping zener diode able to demagnetise inductive loads. Note that the limitation comes from the peak power that the package can handle. Attention must be paid to a proper thermal design of the board. If, for whatever reason (load current or inductive value too big) the peak power dissipation is too high, an external Zener plus Diode arrangement, can perform a demagnetisation versus Ground or versus Vs (see fig 5 and 6). The breakdown voltage of the external Zener Diode must be chosen considering the internal clamping voltage (Vcl) and the supply voltage (Vs) according to: Vz< Vcl(min)-Vs(max) for demagnetisation versus Ground or Vs(max)<Vz<Vcl(min) for demagnetisation versus Vs. Figure 4: Input Comparator Hysteresis Vout 100mV 100mV Vs V i- D94IN079 Vi+ 7/11 L6377 Figure 5: External Demagnetisation Circuit (versus ground) VS RS CURRENT LIMIT OVC DRIVER OUT UV SHORT CIRCUIT CONTROL VZ VZ < Vcl (min) - VS (max) D94IN112 Figure 6: External Demagnetisation Circuit (versus VS) VS VS RS CURRENT LIMIT VZ OVC DRIVER OUT UV SHORT CIRCUIT CONTROL VS (max) < VZ < Vcl (min) 8/11 D94IN111A L6377 MINIDIP PACKAGE MECHANICAL DATA mm DIM. MIN. A TYP. inch MAX. MIN. 3.32 TYP. MAX. 0.131 a1 0.51 0.020 B 1.15 1.65 0.045 0.065 b 0.356 0.55 0.014 0.022 b1 0.204 0.304 0.008 0.012 D E 10.92 7.95 9.75 0.430 0.313 0.384 e 2.54 0.100 e3 7.62 0.300 e4 7.62 0.300 F 6.6 0.260 I 5.08 0.200 L Z 3.18 3.81 1.52 0.125 0.150 0.060 9/11 L6377 016019 A a1 a2 b b1 C c1 D E e e3 F G L M S 10/11 MIN TYP 0.1 0.35 0.19 0.5 45 1 5.8 1.27 7.62 1 4.6 0.5 MAX 1.75 0.2 1.6 0.46 0.25 8.55 6.2 3.8 5.3 1.27 0.68 8 MIN TYP 0.004 0.014 0.007 0.020 1.772 0.039 0.228 0.050 0.300 0.039 0.181 0.020 MAX 0.069 0.008 0.063 0.018 0.010 0.337 0.244 0.150 0.209 0.050 0.027 0.315 L6377 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGSTHOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1996 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 11/11