L6370 2.5A high-side driver industrial intelligent power switch Features ■ 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 ■ Undervoltage lockout with hysteresis ■ Open load detection ■ Two diagnostic outputs ■ Output status led driver ■ Non dissipative short circuit protection ■ Protection against and surge transient (IEC 61000-4-5) ■ Immunity against burst transient (IEC 61000-4-4) ■ ESD protection (human body model ±2kV) PowerSO-20 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. Table 1. Device summary Part number Op. Temp. range, °C Package Packaging L6370D -25 to +85 PowerSO-20 Tube L6370D013TR -25 to +85 PowerSO-20 Tape & Reel June 2007 Rev 7 1/19 www.st.com 19 Contents L6370 Contents 1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 2 3 4 5 2/19 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4 AC operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.1 Diagnostic truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 Input section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.3 Diagnostic logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.4 Short circuit operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.5 Overtemperature protection (OVT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.6 Undervoltage protection (UV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.7 Demagnetization of inductive loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1 PowerSO-20 mechanical data & package dimensions . . . . . . . . . . . . . . . 14 4.2 PowerSO-20 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 L6370 1 Block diagram and pin description Block diagram and pin description Figure 1. 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 Figure 2. D95IN208D Pin connection (top view) 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 DIAGNOSTIC 1 N.C. 7 14 OUTPUT 8 13 RSC OUTPUT 9 12 N.C. 10 11 GND PowerSO-20 GND D95IN210B Note: Output pins must be connected externally to the package to use all leads for the output current (Pin 2, 3, 8 and 9 for PowerSO20 package). 3/19 Block diagram and pin description 1.1 Pin description Table 2. 4/19 L6370 Pin description Pin N° Pin name 14 DIAG1 DIAGNOSTIC 1 output. This open drain reports the IC working conditions. (See Diagnostic truth Table 7) 15 DIAG2 DIAGNOSTIC 2 output. This open drain reports the IC working conditions. (See Diagnostic truth Table 7) 18 IN- Comparator non inverting input 17 IN+ Comparator inverting input 19 OUTSTATUS 1, 10, 11, 20 GND 4 ON-DELAY 13 RSC 8, 9 OUTPUT 5, 6 VS Function 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 3) 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 L6370 Electrical specifications 2 Electrical specifications 2.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol VS VS– VO Value Unit 50 V internally limited V Supply Voltage (TW< 10ms) Supply to Output Differential Voltage. See also VCl Vod Externally Forced Voltage -0.3 to 7 V Iod Externally Forced Voltage +1 mA Vi Input Voltage -10 to VS+10 V Vi Differential Input Voltage 43 V Ii Input Current 20 mA IO Output Current . See also ISC 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 2.2 Parameter Energy Induct. Load TJ= 85°C Thermal data Table 4. Symbol Thermal data Description Value RthJC Thermal Resistance Junction to case Max. RthJA Thermal Resistance Junction to ambient Max. Unit 1.5 °C/W - 5/19 Electrical specifications L6370 2.3 Electrical characteristics Table 5. Electrical characteristics (VS = 24V; TJ = –25 to +125°C, unless otherwise specified) Symbol Vsmin Parameter Supply Voltage for Valid Diagnostics Test condition Min. Idiag> 0.5mA ; Vdg1= 1.5V Typ. Max. Unit 35 V 24 35 V 0.8 3 1.4 4 mA 8.5 9 9.5 V 4 Vs Supply Voltage (operative) Iq Quiescent Current Iout = Ios = 0 Vil Vih Vsth1 Undervoltage Threshold 1 (See Figure 3), Tamb = 0 to +85°C Vsth2 Undervoltage Threshold 2 8 8.5 9 V Vsth3 Supply Voltage Hysteresis 300 500 700 mV Isc Short Circuit Current 9.5 VS = 9.5 to 35V; RL= 2Ω 5kΩ< RSC< 30kΩ 0< RSC< 5kΩ Vdon 15/RSC(kΩ) 2.6 A 3.2 4 A Iout = 2.0A Tj = 25°C Tj = 25°C 200 320 280 440 mV Iout = 2.5A Tj = 25°C Tj = 25°C 250 400 350 550 mV 500 µA 0.8 1.5 V Output Voltage Drop Ioslk Output Leakage Current Vi = Vil; Vo = 0V Vol Low State Out Voltage Vi = Vil; RL = ∞ Vcl Internal Voltage Clamp (VS- VO) IO = 1A Single Pulsed: Tp = 300µs 48 53 58 V Iold Open Load Detection Current Vi = Vih; Tamb = 0 to +85°C 1 3 6 mA Vid Common Mode Input Voltage Range (Operative) VS = 18 to 35V -7 15 V Iib Input Bias Current Vi = -7 to 15V; -In = 0V -250 250 µA Vith Input Threshold Voltage V +In > V -In 0.8 2 V Viths Input Threshold Hysteresis Voltage V +In > V -In 50 400 mV Rid Diff. Input Resistance 0 < +In < +16V ; -In = 0V -7 < +In < 0V ; -In = 0V Iilk 6/19 Input Offset Current 1.4 400 150 V +In = V -In 0V < Vi < 5.5V +Ii -Ii -20 -75 -25 -In = GND 0V < V+In <5.5V +Ii -Ii -250 +10 -125 +In = GND 0V < V-In <5.5V +Ii -Ii -100 -50 -30 -15 KΩ +20 +50 µA L6370 Table 5. Symbol Electrical specifications Electrical characteristics (continued) (VS = 24V; TJ = –25 to +125°C, unless otherwise specified) Parameter Voth1 Output Status Threshold 1 Voltage Voth2 Output Status Threshold 2 Voltage Vohys Output Status Threshold Hysteresis Test condition (See Figure 3) 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 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 = 9.5 to 35V Min. Typ. Max. Unit 4.5 5 5.5 V 4 4.5 5.0 V 300 500 700 mV 4 mA 3 V 25 µA 2 1.5 40 250 mV 5 µA 1.5 V 6 A Source drain NDMOS diode Vfsd Forward On Voltage @ Ifsd = 2.5A Ifp Forward Peak Current t = 10ms; d = 20% trr Reverse Recovery Time If = 2.5A di/dt = 25A/µs tfr Forward Recovery Time 1 200 ns 100 ns 150 °C 20 °C Thermal characteristics ΘLim Junction Temp. Protect. ΘTH Thermal Hysteresis Note: 135 Vil ≤ 0.8V, Vih ≥ 2V @ (V+In > V-In) 7/19 Electrical specifications 2.4 AC operation Table 6. AC operation Symbol tr - t f td Parameter Rise or Fall Time Test condition Min. VS = 24V; RI = 70Ω; Rl to ground Delay Time dV/dt Slew Rate (Rise and Fall Edge) tON On time during Short Circuit Condition tOFF fmax 8/19 L6370 0.7 Typ. Max. Unit 20 µs 5 µs 1 1.5 V/µs 1.28 µs/pF Of time during hort Circuit Condition 64 tON Maximum Operating Frequency 25 KHz 50pF < CDON < 2nF L6370 3 Circuit description Circuit description Figure 3. Output status hysteresis Vshys Voth2 Figure 4. Voth1 D95IN211A VOUT Undervoltage comparator hysteresis Vshys Voth1 Figure 5. Voth2 D95IN212 Vs Switching waveforms Vin 50% 50% td t td Vout 90% 90% 50% 50% 10% 10% tr tf D94IN127A t 9/19 Circuit description 3.1 L6370 Diagnostic truth table Table 7. 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. 3.2 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. 3.3 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: 10/19 – 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 7 L6370 3.4 Circuit description 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 Figure 7) for another tON interval and the sequence starts again, or, whether not, the normal condition operation is resumed. The tON interval can be set to lasts between 64ms 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 7. 3.5 Overtemperature protection (OVT) If the chip temperature exceeds Qlim (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. 3.6 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.). 11/19 Circuit description L6370 The hysteresis (see Figure 4) 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 7) . 3.7 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 4). Figure 6. L6370 short circuit operation waveforms Figure 7. Inductive load equivalent circuit +VS IS 50V VS OUTPUT IO RL D95IN215A 12/19 L L6370 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 13/19 Package mechanical data 4.1 L6370 PowerSO-20 mechanical data & package dimensions Figure 8. DIM. PowerSO-20 mechanical data & package dimensions mm MIN. TYP. A a1 inch MAX. MIN. TYP. 3.6 0.1 0.3 a2 0.142 0.004 0.012 3.3 0.130 a3 0 0.1 0.000 0.004 b 0.4 0.53 0.016 0.021 c 0.23 0.32 0.009 0.013 D (1) 15.8 16 0.622 0.630 D1 (2) 9.4 9.8 0.370 0.386 E 13.9 14.5 0.547 e 1.27 e3 E1 (1) E3 0.570 0.450 11.1 E2 0.429 0.437 0.228 0.244 2.9 5.8 6.2 0.114 G 0 0.1 0.000 0.004 H 15.5 15.9 0.610 0.626 0.8 1.1 0.031 0.043 h L 1.1 0.043 N 8˚(typ.) S 8˚(max. ) T Weight: 1.9gr 0.050 11.43 10.9 OUTLINE AND MECHANICAL DATA MAX. 10 JEDEC MO-166 0.394 PowerSO-20 (1) “D and E1” do not include mold flash or protusions. - Mold flash or protusions shall not exceed 0.15mm (0.006”) - Critical dimensions: “E”, “G” and “a3”. (2) For subcontractors, the limit is the one quoted in jedec MO-166 N R N a2 b A e DETAIL A c a1 DETAIL B E e3 H DETAIL A lead D slug a3 DETAIL B 20 11 0.35 Gage Plane -C- S SEATING PLANE L G E2 E1 BOTTOM VIEW C (COPLANARITY) T E3 1 h x 45˚ 1 0 PSO20MEC D1 0056635 I 14/19 L6370 4.2 Package mechanical data PowerSO-20 packing information Figure 9. PowerSO-20 tube shipment information TUBE MECHANICAL DATA A mm. inch 18.80 0.740 B 17.2 ±0.2 0.677 ±0.008 C 8.20 ±0.2 0.323 ±0.008 D 10.90 ±0.2 0.429 ±0.008 E 2.90 ±0.2 0.114 ±0.008 F 0.40 0.016 G 0.80 0.031 H 6.30 0.248 I 4.30 ±0.2 0.165 ±0.008 J 3.7 ±0.2 0.146 ±0.008 K 9.4 0.370 L 0.40 0.016 M 0.80 0.031 N 3.50 ±0.2 0.138 ±0.008 BASE QUANTITY 31 pcs. BULK QUANTITY 310 pcs. 15/19 Package mechanical data L6370 Figure 10. PowerSO-20 tape shipment specification TAPE MECHANICAL DATA D 16/19 mm. inch 1.50 +0.1/0 0.059 +0.004/0 E 1.75 ±0.1 0.069 ±0.004 Po 4.00 ±0.1 0.157 ±0.004 T max. 0.40 0.016 D1 min. 1.50 0.059 0.453 ±0.002 F 11.5 ±0.05 K max. 6.50 0.256 P2 2.00 ±0.1 0.079 ±0.004 R 50 1.968 W 24.00 ±0.30 0.945 ±0.012 P1 24.00 0.945 Ao, Bo, Ko 0.05 min to 1.0 max. 0.002 min to 0.039 max. BASE QUANTITY 600 pcs. BULK QUANTITY 600 pcs. L6370 Package mechanical data Figure 11. PowerSO-20 reel shipment specification T 40mm (1.575in) min. access hole at slot location B C D A N G measured at hub Full radius Tape slot in core for tape start 2.5mm (0.098in) min. width REEL MECHANICAL DATA mm. inch Tape size 24.0 ±0.30 0.945 ±0.012 A max. 330.0 12.992 B min. 1.5 0.059 C 13.0 ±0.20 0.512 ±0.008 D min. 20.2 0.795 N min. 60 2.362 G 24.4 +2/-0 0.960 +0.079/-0 T max. 30.4 1.197 Figure 12. Footprint recommended data FOOTPRINT DATA mm. inch A 9.5 0.374 B 14.7-15.0 0.579-0.591 C 12.5-12.7 0.492-0.500 D 6.3 0.248 E 0.64 0.026 F 0.71 0.028 G 1.27 0.050 17/19 Revision history 5 L6370 Revision history Table 8. 18/19 Revision history Date Revision Changes 10-Aug-2003 3 Initial release. 12-Dec-2005 4 Applied new Look & Feel Style Sheet. Added L6370D013TR part number. Updated Package and Packing section. 26-Apr-2006 5 Document has been reformatted 19-Feb-2007 6 Typo in Figure 2 on page 3. 19-Jun-2007 7 Truth table updated, deleted Multiwatt mechanical information L6370 Revision history 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. 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