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| 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) BLOCK DIAGRAM VS UNDER VOLTAGE INPUT CHARGE PUMP 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. IN+ IN- + DRIVER OUT NON DISSIPATIVE SHORT CIRCUIT CURRENT LIMITATION OPEN LOAD DETECTION OUTSTATUS DIAG1 DIAGNOSTIC 1.4V RSC ON-DELAY OSC THERMAL PROTECTION DIAG2 3mA OUTPUT STATUS D95IN208D March 1997 1/10 L6370 PIN CONNECTION (Top view) 11 10 9 8 7 6 5 4 3 2 1 D95IN209A OUTPUT SUPPLY VOLTAGE OUTPUT RSC ON-DELAY GND OUTPUT STATUS INPUT INPUT + DIAGNOSTIC 2 DIAGNOSTIC 1 GND OUTPUT OUTPUT ON-DELAY SUPPLY VOLTAGE SUPPLY VOLTAGE N.C. OUTPUT OUTPUT GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 GND OUTPUT STATUS INPUT INPUT + N.C. DIAGNOSTIC 2 DIAGNOSTIC 1 RSC N.C. GND D95IN210B 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 Vod Iod Vi Vi Ii IO Ptot Top Tstg EI Parameter Supply Voltage (Pin 10) (TW < 10ms) Supply to Output Differential Voltage. See also VCl (Pins 10 - 9) Externally Forced Voltage (Pin7) Externally Forced Voltage (Pin7) Input Voltage (Pins 3/4) Differential Input Voltage (Pins 3 - 4) Input Current (Pins 3/4) Output Current (Pin 9). See also ISC (Pin 9) Power Dissipation. See also THERMAL CHARACTERISTICS. Operating Temperature Range (Tamb) Storage Temperature Energy Induct. Load TJ = 85C Value 50 internally limited -0.3 to 7 +1 -10 to VS +10 43 20 internally limited internally limited -25 to +85 -55 to 150 1 Unit V V V mA V V mA A W C C J THERMAL DATA Symbol Rth j-case Rth j-amb Description Thermal Resistance Junction-case Thermal Resistance Junction-ambient Max. Max. Multiwatt 1.5 35 PowerSO20 1.5 - Unit C/W C/W 2/10 L6370 PIN FUNCTION (pin numbering referred to Multiwatt package) N. 1 2 3 4 5 6 7 8 9 10 11 Name DIAG1 DIAG1 IN IN+ OUTSTATUS GND ON-DELAY RSC OUTPUT VS 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 +125C, unless otherwise specified) Symbol Vsmin Vs Iq 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 Test Condition Idiag > 0.5mA ; Vdg1 = 1.5V Min. 4 9.5 Vil Vih (See fig. 1), Tamb = 0 to +85C Typ. Max. 35 35 1.4 5 9.5 9 700 Unit V V mA mA V V mV A 4 280 440 350 550 500 1.5 58 6 15 250 2 400 A mV mV mV mV A V V mA V A V mV K K A A A A A A 3/10 8.5 8 300 24 0.8 3 9 8.5 500 15/RSC (k) Vdon Output Voltage Drop Ioslk Vol Vcl Iold Vid Iib Vith Viths R id Iilk Output Leakage Current Low State Out Voltage Internal Voltage Clamp (VS - VO) Open Load Detection Current Common Mode Input Voltage Range (Operative) Input Bias Current Input Threshold Voltage Input Threshold Hysteresis Voltage Diff. Input Resistance Input Offset Current VS = 9.5 to 35V; RL = 2 5k < RSC < 30k 0 < RSC < 5k Iout = 2.0A Tj = 25C Tj = 125C Iout = 2.5A Tj = 25C Tj = 125C Vi = Vil ; Vo = 0V Vi = Vil ; RL = IO = 1A Single Pulsed: Tp = 300s Vi = Vih; Tamb = 0 to +85C VS = 18 to 35V 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 2.6 3.2 200 320 250 400 0.8 53 3 48 1 -7 -250 0.8 50 1.4 400 150 +Ii -Ii +Ii -Ii +Ii -Ii -20 -75 -250 -100 -50 +20 -25 +10 -125 -30 -15 +50 L6370 ELECTRICAL CHARACTERISTICS (continued) Symbol Voth1 Voth2 Vohys Iosd Vosd Ioslk V dgl Idglk Parameter Output Status Threshold 1 Voltage Output Status Threshold 2 Voltage Output Status Threshold Hysteresis Output Status Source Current Active Output Status Driver Drop Voltage Output Status Driver Leakage Current Diagnostic Drop Voltage Diagnostic Leakage Current Test Condition (See fig. 1) (See fig. 1) (See fig. 1) Vout > Voth1 ; Vos = 2.5V Vs - Vos ; Ios = 2mA Tamb = 0 to +85C Vout < Voth2 ; Vos = 0V VS = 9.5 to 35V D1 / D2 = L ; Idiag = 0.5mA D1 / D2 = L ; Idiag = 3mA D1 / D2 =H ; 0 < Vdg < Vs VS = 9.5 to 35V 40 250 5 Min. 4.5 4 300 2 1.5 Typ. 5 4.5 500 Max. 5.5 5.0 700 4 3 25 Unit V V mV mA V A mV mV A SOURCE DRAIN NDMOS DIODE V fsd Ifp trr tfr Lim TH Forward On Voltage Forward Peak Current Reverse Recovery Time Forward Recovery Time @ Ifsd = 2.5A t = 10ms; d = 20% If = 2.5A di/dt = 25A/s 200 100 1 1.5 6 V A ns ns C C THERMAL CHARACTERISTICS Junction Temp. Protect. Thermal Hysteresis 135 150 20 Note Vil < 0.8V, Vih > 2V @ (V+In > V-In) AC OPERATION (pin numbering referred to Multiwatt package) Symbol tr - tf td dV/dt tON tOFF fmax Pin 9 vs 4 9 vs 3 9, 11 7 Parameter Rise or Fall Time Delay Time Slew Rate (Rise and Fall Edge) On time during Short Circuit Condition Of time during hort Circuit Condition Maximum Operating Frequency 50pF Vshys Voth2 Voth1 D95IN211A V OUT 4/10 L6370 Figure 2: Undervoltage Comparator Hysteresis Vshys Voth1 Voth2 D95IN212 Vs Figure 3: Switching Waveforms Vin 50% 50% td V out 90% 50% 10% tr td t 90% 50% 10% 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 eration is resumed. The tON interval can be set to lasts between 64s and 2.56ms for a CON capacitor value ranging between 50pF and 2nF to have: tON (s) = 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 lim (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 lim-H. 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 = 85C) (see figure 2) 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 L6370 Figure 4: L6370 Short Circuit OperationWaveforms OUTPUT CURRENT Isc Iout t tOFF tON tOFF Time Short Circuit D95IN213 Time Figure 5: Inductive Load Equivalent Circuit +VS IS 50V VS OUTPUT IO RL D95IN215A L 7/10 L6370 MULTIWATT11 (in line) PACKAGE MECHANICAL DATA DIM. MIN. A B C E F G G1 H1 H2 L L1 L3 L4 L7 S S1 Dia1 26.4 22.35 17.25 10.3 2.65 1.9 1.9 3.65 17.5 10.7 0.49 0.88 1.57 16.87 19.6 20.2 26.9 22.85 17.75 10.9 2.9 2.6 2.6 3.85 1.039 0.880 0.679 0.406 0.104 0.075 0.075 0.144 0.689 0.421 1.7 17 mm TYP. MAX. 5 2.65 1.6 0.55 0.95 1.83 17.13 0.019 0.035 0.062 0.664 0.772 0.795 1.059 0.900 0.699 0.429 0.114 0.102 0.102 0.152 0.067 0.669 MIN. inch TYP. MAX. 0.197 0.104 0.063 0.022 0.037 0.072 0.674 8/10 L6370 PowerSO20 PACKAGE MECHANICAL DATA DIM. MIN. A a1 a2 a3 b c D (1) E e e3 E1 (1) E2 G h L N S T 10.0 0.80 0 10.90 0 0.40 0.23 15.80 13.90 1.27 11.43 11.10 2.90 0.10 1.10 1.10 8 (max.) 0.3937 0.0314 10 (max.) 0.0433 0 0.4291 0.10 mm TYP. MAX. 3.60 0.30 3.30 0.10 0.53 0.32 16.00 14.50 0 0.0157 0.009 0.6220 0.5472 0.050 0.450 0.437 0.1141 0.0039 0.0039 MIN. inch TYP. MAX. 0.1417 0.0118 0.1299 0.0039 0.0209 0.0126 0.6299 0.570 (1) "D and E1" do not include mold flash or protrusions - Mold flash or protrusions shall not exceed 0.15mm (0.006") N N a2 b e e3 A R c DETAILB a1 E DETAILA D lead 20 11 DETAILA a3 DETAILB E2 T E1 Gage Plane 0.35 slug - 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. (c) 1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved MULTIWATT (R) is a Registered Trademark of SGS-THOMSON Microelectronics PowerSO20TM 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 |
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