L6370 2.5A HIGH-SIDE DRIVER INDUSTRIAL INTELLIGENT POWER SWITCH 2.5A OUTPUT CURRENT 9.5V TO 35V SUPPLY VOLTAGE RANGE INTERNAL CURRENT LIMITING THERMAL SHUTDOWN OPEN GROUND PROTECTION INTERNAL NEGATIVE VOLTAGE CLAMPING TO VS - 50V FOR FAST DEMAGNETIZATION DIFFERENTIAL INPUTS WITH LARGE COMMON MODE RANGE AND THRESHOLD HYSTERESIS UNDERVOLTAGELOCKOUT WITH HYSTERESIS OPEN LOAD DETECTION TWO DIAGNOSTIC OUTPUTS OUTPUT STATUS LED DRIVER NON DISSIPATIVE SHORT CIRCUIT PROTECTION PROTECTION AGAINST AND SURGE TRANSIENT (IEC 801-5) IMMUNITY AGAINST BURST TRANSIENT (IEC 801-4) ESD PROTECTION (HUMAN BODY MODEL ±2KV) MULTIPOWER BCD TECHNOLOGY MULTIWATT11 (in line) PowerSO20 ORDERING NUMBERS: L6370L (MULTIWATT11) L6 37 0 D ( P o we rS O 2 0 ) DESCRIPTION The L6370 is a monolithic Intelligent Power Switch in Multipower BCD Technology, for driving inductive or resistive loads. An internal Clamping Diode enables the fast demagnetization of inductive loads. Diagnostic for CPU feedback and extensive use of electrical protections make this device extremely rugged and specially suitable for industrial automation applications. BLOCK DIAGRAM VS UNDER VOLTAGE IN+ INPUT IN- CHARGE PUMP + DRIVER 1.4V OUT NON DISSIPATIVE SHORT CIRCUIT ON-DELAY CURRENT LIMITATION RSC OPEN LOAD DETECTION OSC OUTSTATUS DIAG1 DIAGNOSTIC THERMAL PROTECTION DIAG2 3mA OUTPUT STATUS March 1997 D95IN208D 1/10 L6370 PIN CONNECTION (Top view) 11 OUTPUT 10 SUPPLY VOLTAGE 9 OUTPUT 8 RSC 7 ON-DELAY 6 GND 5 OUTPUT STATUS 4 INPUT - 3 INPUT + 2 DIAGNOSTIC 2 GND 1 20 GND OUTPUT 2 19 OUTPUT STATUS OUTPUT 3 18 INPUT - ON-DELAY 4 17 INPUT + SUPPLY VOLTAGE 5 16 N.C. SUPPLY VOLTAGE 6 15 DIAGNOSTIC 2 N.C. 7 14 DIAGNOSTIC 1 OUTPUT 8 13 RSC OUTPUT 9 12 N.C. 10 11 GND DIAGNOSTIC 1 1 GND D95IN210B D95IN209A Note: Output pins must be must be connected externally to the package to use all leads for the output current (Pin 9 and 11 for Multiwatt package, Pin 2, 3, 8 and 9 for PowerSO20 package). ABSOLUTE MAXIMUM RATINGS (Pin numbering referred to Multiwatt package) Symbol VS VS – VO Parameter Value Unit 50 V internally limited V Supply Voltage (Pin 10) (TW < 10ms) Supply to Output Differential Voltage. See also VCl (Pins 10 - 9) Vod Externally Forced Voltage (Pin7) -0.3 to 7 V Iod Externally Forced Voltage (Pin7) +1 mA Vi Input Voltage (Pins 3/4) -10 to VS +10 V Vi Differential Input Voltage (Pins 3 - 4) 43 V Ii Input Current (Pins 3/4) 20 mA IO Output Current (Pin 9). See also ISC (Pin 9) internally limited A Ptot Power Dissipation. See also THERMAL CHARACTERISTICS. internally limited W Top Operating Temperature Range (Tamb) -25 to +85 °C Tstg Storage Temperature -55 to 150 °C 1 J EI Energy Induct. Load TJ = 85°C THERMAL DATA Symbol Multiwatt PowerSO20 Unit Rth j-case Thermal Resistance Junction-case Max. 1.5 1.5 °C/W Rth j-amb Thermal Resistance Junction-ambient Max. 35 – °C/W 2/10 Description L6370 PIN FUNCTION (pin numbering referred to Multiwatt package) N. 1 Name DIAG1 2 DIAG1 3 4 5 IN IN+ OUTSTATUS 6 7 8 9 10 GND ON-DELAY RSC OUTPUT VS 11 OUTPUT Function DIAGNOSTIC 1 output. This open drain reports the IC working conditions. (See Diagnostic truth table) DIAGNOSTIC 2 output. This open drain reports the IC working conditions. (See Diagnostic truth table) Comparator non inverting input Comparator inverting input This current source output is capable of driving a LED to signal the status of the output pin. The pin is active (source current) when the output pin is considered high (See fig 1) Ground Programmable ON time interval duration during short circuit operation Current limitation setting. High Side output with built-in current limitation Supply Volatge Input, the value of the supply voltage is monitored to detect under voltage condition High Side output with built-in current limitation ELECTRICAL CHARACTERISTICS (VS = 24V; TJ = –25 to +125°C, unless otherwise specified) Symbol Vsmin Vsth1 Vsth2 Vshys Isc Parameter Supply Voltage for Valid Diagnostics Supply Voltage (operative) Quiescent Current Iou t = Ios = 0 Undervoltage Threshold 1 Undervoltage Threshold 2 Supply Voltage Hysteresis Short Circuit Current Vdon Output Voltage Drop Ioslk Vol Vcl Output Leakage Current Low State Out Voltage Internal Voltage Clamp (VS - VO) Iold Vid R id Open Load Detection Current Common Mode Input Voltage Range (Operative) Input Bias Current Input Threshold Voltage Input Threshold Hysteresis Voltage Diff. Input Resistance Iilk Input Offset Current Vs Iq Iib Vith Viths Test Condition Idiag > 0.5mA ; Vdg1 = 1.5V Vil Vih (See fig. 1), Tamb = 0 to +85°C VS = 9.5 to 35V; RL = 2Ω 5kΩ < RSC < 30kΩ 0 < RSC < 5kΩ Iout = 2.0A Tj = 25°C Tj = 125°C Iout = 2.5A Tj = 25°C Tj = 125°C Vi = Vil ; Vo = 0V Vi = Vil ; RL = ∞ IO = 1A Single Pulsed: Tp = 300µs Vi = Vih; Tamb = 0 to +85°C VS = 18 to 35V Typ. Max. 35 Unit V 9.5 24 0.8 3 9 8.5 500 35 1.4 5 9.5 9 700 V mA mA V V mV 8.5 8 300 15/RSC (kΩ) 2.6 48 1 –7 Vi = –7 to 15V; –In = 0V V+In > V–In V+In > V–In 0 < +In < +16V ; –In = 0V –7 < +In < 0V ; –In = 0V V+In = V–In 0V < Vi <5.5V –In = GND 0V < V+In <5.5V +In = GND 0V < V–In <5.5V Min. 4 –250 0.8 50 3.2 200 320 250 400 0.8 53 3 1.4 A 4 280 440 350 550 500 1.5 58 A mV mV mV mV µA V V 6 15 mA V 250 2 400 µA V mV 400 150 +Ii –Ii +Ii –Ii +Ii –Ii –20 –75 –250 –100 –50 +20 –25 +10 –125 –30 –15 +50 KΩ KΩ µA µA µA µA µA µA 3/10 L6370 ELECTRICAL CHARACTERISTICS (continued) Symbol Min. Typ. Max. Unit Voth1 Output Status Threshold 1 Voltage Parameter (See fig. 1) Test Condition 4.5 5 5.5 V Voth2 Output Status Threshold 2 Voltage (See fig. 1) 4 4.5 5.0 V Vohys Output Status Threshold Hysteresis (See fig. 1) 300 500 700 mV 4 mA 3 V 25 µA Iosd Output Status Source Current Vout > Voth1 ; Vos = 2.5V Vosd Active Output Status Driver Drop Voltage Vs – Vos ; Ios = 2mA Tamb = 0 to +85°C Ioslk Output Status Driver Leakage Current Vout < Voth2 ; Vos = 0V VS = 9.5 to 35V V dgl Diagnostic Drop Voltage D1 / D2 = L ; Idiag = 0.5mA D1 / D2 = L ; Idiag = 3mA Idglk Diagnostic Leakage Current D1 / D2 =H ; 0 < Vdg < Vs VS = 9.5 to 35V 2 1.5 40 250 mV mV 5 µA 1.5 V SOURCE DRAIN NDMOS DIODE V fsd Forward On Voltage @ Ifsd = 2.5A 1 Ifp Forward Peak Current t = 10ms; d = 20% trr Reverse Recovery Time If = 2.5A di/dt = 25A/µs tfr Forward Recovery Time 6 A 200 ns 100 ns THERMAL CHARACTERISTICS Θ Lim ΘTH Junction Temp. Protect. 135 150 °C 20 °C Thermal Hysteresis Note Vil < 0.8V, Vih > 2V @ (V+In > V–In) AC OPERATION (pin numbering referred to Multiwatt package) Symbol Pin tr - tf 9 vs 4 Rise or Fall Time Parameter Test Condition td 9 vs 3 Delay Time dV/dt 9, 11 Slew Rate (Rise and Fall Edge) tON 7 Min. VS = 24V; RI = 70Ω; Rl to ground On time during Short Circuit Condition 0.7 50pF <CDON < 2nF Max. Unit 20 µs 5 µs 1 1.5 V/µs 1.28 µs/pF tOFF Of time during hort Circuit Condition 64 tON fmax Maximum Operating Frequency 25 KHz Figure 1: Output Status Hysteresis Vshys Voth2 4/10 Typ. Voth1 D95IN211A V OUT L6370 Figure 2: Undervoltage Comparator Hysteresis Vshys Voth1 Voth2 D95IN212 Vs Figure 3: Switching Waveforms Vin 50% 50% td t td V out 90% 90% 50% 50% 10% 10% tr tf D94IN127A t DIAGNOSTIC TRUTH TABLE Diagnostic Conditions Normal Operation Open Load Condition (Io < Iold) Short to VS Short Circuit to Ground (IO = ISC) (**) (pin ON-DELAY grounded) Output DMOS Open Overtemperature Supply Undervoltage (VS < Vsth2) Input L H L H L H H L H L H L H Output L H L H H H H (*) L L L L L L L Diag1 H H H L L L H H H L H H L L Diag2 H H H H H H H H H H L L L L (*) According to the intervention of the current limiting block. (**) A cold lamp filament, or a capacitive load may activate the current limiting circuit of the I PS, when the IPS is initially turned on. 5/10 L6370 INPUT SECTION The input section is an high impedance differential stage with high common and differential mode range. There’s built-in offset of +1.4V (typical value) and an hysteresis of 400mV (maximum value), to ensure high noise immunity. DIAGNOSTIC LOGIC The operating conditions of the device are permanently monitored and the following occurences are signalled via the DIAG1/DIAG2 open-drain output pins: -Short Circuit versus ground. A current limiting circuit fixes at Isc = 3.2A (typical value) the maximum current that can be sourced from the OUTPUT pin (for more details see short circuit operation section). - Short Circuit versus Vs. - Under Voltage(UV) - Over Temperature (OVT) - Open Load, if the output current is less than 3mA (typical value). - Output DMOS Open according to the diagnostic Truth Table: SHORT CIRCUIT OPERATION in order to minimise the power dissipation when the output is shorted to grounded, an innovative, non dissipative short cicuit protection (patent pending) is implemented, avoiding, thus the intervention of the thermal protection in most cases. Whenever the output is shorted to ground, or, generally speaking, an over current is sinked by the load, the output devices is driven in linear mode, sourcing the Isc current (typically 3.2A) for a time interval (ton) defined by means of the external CON capacitor connected between the ONDELAY pin and GND. Whether the short circuit crease within the ton interval the DIAG2 output status is not affected, acting as a Programmable Diagnostic Delay. This function allow the device to drive a capacitive load or a filament lamp (that exhibits a very low resistance during the initial heading phase) without the intervention of the diagnostic. If the short circuit lasts for the whole tON interval, the output DMOS is switched OFF and the DIAG2 goes low, for a time interval tOFF lasting 64 times tON. At the end of the tOFF interval if the short circuit condition is still present, the output DMOS is turned ON (and the DIAG2 goes high - see fig4) for another tON interval and the sequence starts again, or, whether not, the normal condition op- 6/10 eration is resumed. The tON interval can be set to lasts between 64µs and 2.56ms for a CON capacitor value ranging between 50pF and 2nF to have: tON (µs) = 1.28 CON (pF) If the ON-DELAY pin is grounded the non dissipative short circuit protection is disabled, and the Isc current is delivered until the Overtemperature Protection shuts the device off. The behaviour of the DIAG2 output is, in this situation, showed in the Diagnostic Truth Table. OVERTEMPERATURE PROTECTION (OVT) If the chip temperature exceeds Θlim (measured in a central position in the chip) the chip deactivates itself. The following actions are taken: all the output stage is switched off; the signal DIAG2 is activated (active low). Normal operation is resumed as soon as (typically after some seconds) the chip temperature monitored goes back below Θlim-ΘH. The different thresholds with hysteretic behavior assure that no intermittent conditions can be generated. UNDERVOLTAGE PROTECTION (UV) The supply voltage is expected to range from 9.5V to 35V, even if its reference value is considered to be 24V. In this range the device operates correctly. Below 9.5V the overall system has to be considered not reliable. Protection will thus shut off the output whenever the supply voltage falls below the mask fixed by the Vsth1(9V typ.) and Vsth2 (8.5V typ.). The hysteresis (see fig. 2) ensures a non intermittent behavior at low supply voltage with a superimposed ripple. The Under Voltage status is signalled via the DIAG1 and DIAG2 outputs (see the Diagnostic Truth Table) . DEMAGNETIZATION OF INDUCTIVE LOADS An internal zener diode, limiting the voltage across the Power MOS to between 50 and 60V (Vcl), provides safe and fast demagnetization of inductive loads without external clamping devices. The maximum energy that can be absorbed from an inductive load is specified as 1J (at Tj = 85°C) (see figure 2) L6370 Figure 4: L6370 Short Circuit OperationWaveforms OUTPUT CURRENT Isc Iout t<tON DIAG2 (active low) tON Short Circuit tOFF tON Time tOFF Short Circuit D95IN213 Time Figure 5: Inductive Load Equivalent Circuit +VS IS 50V VS OUTPUT IO L RL D95IN215A 7/10 L6370 MULTIWATT11 (in line) PACKAGE MECHANICAL DATA mm DIM. MIN. TYP. MAX. MIN. TYP. MAX. A 5 0.197 B 2.65 0.104 C 1.6 0.063 E 0.49 0.55 0.019 0.022 F 0.88 0.95 0.035 0.037 G 1.57 1.7 1.83 0.062 0.067 0.072 G1 16.87 17 17.13 0.664 0.669 0.674 H1 19.6 0.772 H2 8/10 inch 20.2 0.795 L 26.4 26.9 1.039 1.059 L1 22.35 22.85 0.880 0.900 L3 17.25 17.5 17.75 0.679 0.689 0.699 L4 10.3 10.7 10.9 0.406 0.421 0.429 L7 2.65 2.9 0.104 0.114 S 1.9 2.6 0.075 0.102 S1 1.9 2.6 0.075 0.102 Dia1 3.65 3.85 0.144 0.152 L6370 PowerSO20 PACKAGE MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. A MIN. TYP. MAX. 3.60 a1 0.10 0.1417 0.30 a2 0.0039 0.0118 3.30 0.1299 a3 0 0.10 0 0.0039 b 0.40 0.53 0.0157 0.0209 c 0.23 0.32 0.009 0.0126 D (1) 15.80 16.00 0.6220 0.6299 E 13.90 14.50 0.5472 0.570 e 1.27 0.050 e3 11.43 0.450 E1 (1) 10.90 11.10 E2 0.4291 0.437 2.90 G 0 0.1141 0.10 h 0 0.0039 0.0314 0.0433 1.10 L 0.80 1.10 N 10° (max.) S 8° (max.) T 10.0 0.3937 (1) ”D and E1” do not include mold flash or protrusions - Mold flash or protrusions shall not exceed 0.15mm (0.006”) N R N a2 b DETAILA A e c a1 DETAILB E e3 D DETAILA lead 20 11 slug a3 DETAILB E2 E1 0.35 Gage Plane T - C- S L SEATING PLANE G C (COPLANARITY) 1 10 PSO20MEC h x 45° 9/10 L6370 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. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1997 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved MULTIWATT is a Registered Trademark of SGS-THOMSON Microelectronics PowerSO20 is a Trademark of SGS-THOMSON Microelectronics 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. 10/10