L6375S 0.5A high-side driver industrial intelligent power switch Preliminary Data Features ■ 0.5A output current ■ 8V to 35V supply voltage range ■ Internal current limiting ■ Thermal shutdown ■ Open ground protection ■ Internal negative voltage clamping for fast demagnetization ■ Differential inputs with large common mode range and threshold hysteresis ■ Undervoltage lockout with hysteresis ■ Open load detection ■ Two diagnostic outputs ■ Output status LED driver ■ Non dissipative short circuit protection ■ Immunity against burst transient (IEC 61000-4-4) ■ Description ESD protection (human body model ±2kV) Table 1. SO-8 The L6375S is a monolithic Intelligent Power Switch in Multipower BCD Technology, for driving inductive or resistive loads with controlled output voltage slew rate and short circuit protection. 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. Device summary Order codes Op. temp. range, °C Package Packaging L6375S -25 to +125 SO-8 Tube L6375STR -25 to +125 SO-8 Tape & Reel October 2007 Rev 5 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. 1/17 www.st.com 17 Contents L6375S Contents 1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4 Switching waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5 Input section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.6 Over temperature protection (OVT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.7 Under voltage protection (UV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.8 Over current operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.9 Diagnostic logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.10 Demagnetization of inductive loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.11 Diagnostic truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2/17 L6375S 1 Block diagram and pin description Block diagram and pin description Figure 1. Block diagram 3/17 Block diagram and pin description Figure 2. L6375S Pin connection (top view) SO-8 1.1 Pin description Table 2. 4/17 Pin description Pin N° Pin name 1 GND Ground 2 OUT High Side output with built-in current limitation 3 VS Supply Voltage Input, the value of the supply voltage is monitored to detect under voltage condition 4 Output status 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 Figure 4) 5 DIAG1 DIAGNOSTIC 1 output. This open drain reports the IC working conditions. (See Diagnostic truth Table 6) 6 DIAG2 DIAGNOSTIC 2 output. This open drain reports the IC working conditions. (See Diagnostic truth Table 6) 7 IN+ 8 ON-DELAY Function Comparator inverting input Programmable ON time interval duration during short circuit operation L6375S Electrical specifications 2 Electrical specifications 2.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol Value Unit Vs Supply voltage (tw < 10 ms) 50 V Vs Supply voltage (DC) 40 V internally limited V Vs -Vout Supply to output differential voltage Vod Externally forced voltage -0.3 to 7 V Iod Externally forced current ±1 mA Iout Output current (see also Isc) internally limited A Vout Output voltage internally limited V PTOT Power dissipation internally limited W Vdiag External voltage -0.3 to 40 V Idiag Externally forced current -10 to 10 mA Ii 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 200 mJ Value Unit TSTG EI 2.2 Parameter Energy inductive load TJ = 85°C Thermal data Table 4. Symbol Thermal data Parameter RthJA Thermal resistance junction-ambient Max 100(1) °C/W RthJP Thermal resistance junction-pins Max 15 °C/W 1. When mounted on a standard single-sided FR-4 board with 0.5 cm2 of Cu (at least 35µm) thick connected to all VCC pins. Horizontal mounting and no artificial air flow. 5/17 Electrical specifications 2.3 Electrical characteristics Table 5. Symbol Vsmin Electrical characteristics (VS = 24V; TJ = –25 to +125°C, unless otherwise specified) Parameter Supply voltage for valid diagnostic Test condition Idiag = > 0.5mA; Vdiag = 1.5V; Min Typ 4 Max Unit 35 V Vs Operative supply voltage 8 24 35 V Vsth1 Undervoltage threshold 1 7 7.5 8 V Vsth2 Undervoltage threshold 2 6.5 7 7.5 V Vshys Under voltage hysteresis 300 500 700 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 Vil Input low level voltage Vih Input high level voltage Vih Iib 2 V 50 400 mV -7 0.8 V Vs < 18V 2 Vs - 3 V Input high level voltage Vs > 18V 2 15 V Input bias current Vi = -7 to 15V -250 250 mA Delay capacitor charging current ON DELAY pin shorted to Ground 2.5 Output voltage drop Iout = 500mA TJ = 25°C TJ = 125°C Iout =625mA TJ = 25°C TJ= 125°C 200 320 250 400 Iolk Output leakage current Vi = LOW; Vout=0 Vol Output low state voltage Vi = HIGH; pin floating Vcl Internal voltage clamp (Vs-Vout) Io = 200mA single pulsed = 300ms Isc Short circuit output current Iold Open load detection current Idch Vdon 1.3 mA 280 440 350 550 mV mV mV mV 100 µA 0.8 1.5 V 48 53 58 V Vs = 8 to 35V; Rl = 2Ω; 0.75 1.1 1.5 A Vi = Vih; TA= 0 to +85°C 1 3 6 mA Voth1 Output status threshold 1 voltage 4.5 5 5.5 V Voth2 Output status threshold 2 voltage 4 4.5 5 V Vohys Output status threshold hysteresis 300 500 700 mV 4 mA Iosd 6/17 L6375S Output status source current Vout > Voth1 ; Vos = 2.5V 2 L6375S Electrical specifications Table 5. Symbol Electrical characteristics (continued) (VS = 24V; TJ = –25 to +125°C, unless otherwise specified) Parameter Test condition Min Typ Max Unit 1.5 3 V 25 mA Vosd Active output status driver drop VS – VOS ; IOS = 2mA TA = 0 to +85°C voltage Ioslk Output status driver leakage current Vout < Voth2 ; Vos = 0V VS = 18 to 35V Vdgl 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 = 15.6 to 35V Tmax Over temperature upper threshold 150 °C Thys Over temperature hysteresis 20 °C 40 250 mV mV 5 µA AC operation (pin numbering referred to Minidip package) tr -tr td dV/dt Rise or fall time Vs = 24V; Rl =70Ω Rl to ground 20 µs Delay time Vs = 24V; Rl =70Ω Rl to ground 5 µs Slew rate (rise and fall edge) tON On time during short circuit condition tOFF fmax 7 1 15 V/µs 1.28 µs/pF Off time during short circuit condition 64 tON Maximum operating frequency 25 KHz 50pF < CDON< 2nF Source drain NDMOS diode Vf Forward on voltage @ Ifsd = 625mA IfD Forward peak voltage t = 10ms; d = 20% trr Reverse recovery time If= 625mA di/dt = 25A/ms tfr Forward recovery time 1 1.5 V 2 A 200 ns 50 ns 7/17 Electrical specifications 2.4 Switching waveform Figure 3. 2.5 L6375S Switching waveform Input section An Single ended Input TTL/CMOS compatible with wide voltage range and high noise immunity (thanks to a built in hysteresis) is available. 2.6 Over temperature protection (OVT) An on-chip Over Temperature Protection provides an excellent protection of the device in extreme conditions. Whenever the temperature - measured on a central portion of the chip exceeds Tmax = 150oC (typical value) the device is shut off, and the DIAG2 output goes LOW. Normal operation is resumed as the chip temperature (normally after few seconds) falls below Tmax - Thys = 130oC (typical value). The hysteresis avoid that is an intermittent behavior take place. 2.7 Under voltage protection (UV) The supply voltage is expected to range from 8 to 35V. In this range the device operates correctly. 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 DIAG1 and DIAG2 (see Diagnostic truth table). Normal operation is resumed as soon as Vs exceeds Vsth. The hysteretic behavior prevents intermittent operation at low supply voltage. 8/17 L6375S 2.8 Electrical specifications 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 (1.1A 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 µsec/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. When also the Toff interval has expired, the out-put power MOS is switched ON. At this point in time two conditions may occur a) The overloads still present, and then the output power MOS is again driven in linear mode (limiting the output current to ISC) for another TON, starting a new cycle, or b) the over load the overload condition is removed, and the output power MOS is no longer driven in linear mode. All these occurrences are presented on the DIAG2 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 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 DIAG2 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 ON DELAY pin. Figure 4. Non dissipative short circuit protection operation 9/17 Electrical specifications 2.9 L6375S Diagnostic logic The operating conditions of the device are permanently monitored and the following occurrences are signalled via the DIAG1/DIAG2 open-drain output pins see diagnostic Truth Table. 2.10 ● Short Circuit versus ground. ● Short Circuit versus VS. ● Under Voltage (UV) ● Over Temperature (OVT) ● Open Load, if the output current is less than 3mA (typical value). 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 200mJ (at TJ = 85°C) 2.11 Diagnostic truth table Table 6. Diagnostic truth table Diagnostic conditions Input Output Diag1 Diag2 Normal Operation L H L H H H H H Open Load Condition (Io< Iold) L H L H H L H H Short to VS L H H H L L H H Short Circuit to Ground (IO = ISC) (1) (pin ON-DELAY grounded) H L X L H H H H Output DMOS Open L H L L H L H H Overtemperature L H L L H H L L Supply Undervoltage (VS< Vsth2) L H L L L L L L 1. A cold lamp filament, or a capacitive load may activate the current limiting circuit of the IPS, when the IPS is initially turned on. 10/17 L6375S 3 Application circuits Application circuits Figure 5. Inductive load equivalent circuit Figure 6. External demagnetisation circuit (versus ground) 11/17 Application circuits L6375S Figure 7. External demagnetisation circuit (versus vs) Figure 8. Application schematic (IEC 61000-4-5) (IEC 61000-4-6) ON-DELAY 12/17 L6375S 4 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com 13/17 Package mechanical data Table 7. L6375S SO-8 mechanical data mm inch Dim. Min Typ A a1 Max Typ 1.75 0.1 0.25 a2 Max 0.068 0.003 0.009 1.65 0.064 a3 0.65 0.85 0.025 0.033 b 0.35 0.48 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.25 0.5 0.010 0.019 c1 45 ( typ. ) D 4.8 5.0 0.188 0.196 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 F 3.8 4.0 0.14 0.157 L 0.4 1.27 0.015 0.050 M 0.6 S Figure 9. 14/17 Min 0.023 8º (max.) Package dimensions L6375S Package mechanical data Figure 10. SO-8 Tape and reel information 15/17 Revision history 5 L6375S Revision history Table 8. 16/17 Revision history Date Revision Changes 18-Sep-2006 1 Initial release 19-Jun-2007 2 Truth table updated 05-Jul-2007 3 Typo in Table 5 on page 6 16-Jul-2007 4 Pin out updated 15-Oct-2007 5 Updated Table 4 on page 5 L6375S Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2007 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 17/17