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preliminary data this is preliminary information on a new product now in deve lopment or undergoing evaluation. details are subject to change without notice. october 2007 rev 5 1/17 17 L6375S 0.5a high-side driver industrial intelligent power switch 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 wit h 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) esd protection (human body model 2kv) description the L6375S is a monolit hic 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. so-8 table 1. device summary order codes op. temp. range, cpackage packaging L6375S -25 to +125 so-8 tube L6375Str -25 to +125 so-8 tape & reel www.st.com
contents L6375S 2/17 contents 1 block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 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
L6375S block diagram and pin description 3/17 1 block diagram and pin description figure 1. block diagram
block diagram and pin description L6375S 4/17 figure 2. pin connection (top view) 1.1 pin description so-8 table 2. pin description pin n pin name function 1 gnd ground 2 out high side output with built-in current limitation 3v s supply voltage input, the value of th e 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 pi n. 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 ta bl e 6 ) 6 diag2 diagnostic 2 output. this open drain reports the ic working conditions. (see diagnostic truth ta bl e 6 ) 7 in+ comparator inverting input 8 on-delay programmable on time interval duration during short circuit operation
L6375S electrical specifications 5/17 2 electrical specifications 2.1 absolute maximum ratings 2.2 thermal data table 4. thermal data table 3. absolute maximum ratings symbol parameter value unit v s supply voltage (tw < 10 ms) 50 v v s supply voltage (dc) 40 v v s -v out supply to output differential voltage internally limited v v od externally forced voltage -0.3 to 7 v i od externally forced current 1 ma i out output current (see also isc) internally limited a v out output voltage internally limited v p tot power dissipation internally limited w v diag external voltage -0.3 to 40 v i diag externally forced current -10 to 10 ma i i input current 20 ma v i input voltage -10 to vs +0.3 v t op ambient temperature, operating range -25 to 85 c t j junction temperature, operating range (see overtemperature protection) -25 to 125 c t stg storage temperature -55 to 150 c e i energy inductive load t j = 85c 200 mj symbol parameter value unit r thja thermal resistance junction-ambient max 100 (1) 1. when mounted on a standard single-sided fr-4 board with 0.5 cm 2 of cu (at least 35 m) thick connected to all v cc pins. horizontal mounting and no artificial air flow. c/w r thjp thermal resistance junction-pins max 15 c/w
electrical specifications L6375S 6/17 2.3 electrical characteristics table 5. electrical characteristics (v s = 24v; t j = ?25 to +125c, unless otherwise specified) symbol parameter test condition min typ max unit v smin supply voltage for valid diagnostic idiag = > 0.5ma; vdiag = 1.5v; 4 35 v vs operative supply voltage 8 24 35 v v sth1 undervoltage threshold 1 7 7.5 8 v v sth2 undervoltage threshold 2 6.5 7 7.5 v v shys under voltage hysteresis 300 500 700 mv i q quiescent current output open 800 a i qo quiescent current output on 1.6 ma v ith input threshold voltage 0.8 1.3 2 v v iths input threshold hysteresis 50 400 mv v il input low level voltage -7 0.8 v v ih input high level voltage v s < 18v 2 v s - 3 v v ih input high level voltage v s > 18v 2 15 v i ib input bias current v i = -7 to 15v -250 250 ma i dch delay capacitor charging current on delay pin shorted to ground 2.5 ma v don output voltage drop iout = 500ma t j = 25c t j = 125c iout =625ma t j = 25c t j = 125c 200 320 250 400 280 440 350 550 mv mv mv mv i olk output leakage current v i = low; vout=0 100 a v ol output low state voltage v i = high; pin floating 0.8 1.5 v v cl internal voltage clamp (vs-vout) i o = 200ma single pulsed = 300ms 48 53 58 v i sc short circuit output current v s = 8 to 35v; r l = 2 ? ; 0.75 1.1 1.5 a i old open load detection current v i = v ih ; t a = 0 to +85c 1 3 6 ma v oth1 output status threshold 1 voltage 4.5 5 5.5 v v oth2 output status threshold 2 voltage 4 4.5 5 v v ohys output status threshold hysteresis 300 500 700 mv i osd output status source current vo ut > voth1 ; vos = 2.5v 2 4 ma
L6375S electrical specifications 7/17 table 5. electrical characteristics (continued) (v s = 24v; t j = ?25 to +125c, unless otherwise specified) symbol parameter test condition min typ max unit v osd active output stat us driver drop voltage v s ? v os ; i os = 2ma t a = 0 to +85c 1.5 3 v i oslk output status driver leakage current v out < v oth2 ; v os = 0v v s = 18 to 35v 25 ma v dgl diagnostic drop voltage d1 / d2 = l ; i diag = 0.5ma d1 / d2 = l ; i diag = 3ma 40 250 mv mv i dglk diagnostic leakage current d1 / d2 = h ; 0 < v dg < v s v s = 15.6 to 35v 5 a t max over temperature upper threshold 150 c t hys over temperature hysteresis 20 c ac operation (pin numbering referred to minidip package) t r -t r rise or fall time v s = 24v; r l =70 ? r l to ground 20 s t d delay time v s = 24v; r l =70 ? r l to ground 5 s dv/dt slew rate (rise and fall edge) 7 1 15 v/ s t on on time during short circuit condition 50pf < c don < 2nf 1.28 s/pf t off off time during short circuit condition 64 t on f max maximum operating frequency 25 khz source drain ndmos diode v f forward on voltage @ ifsd = 625ma 1 1.5 v i fd forward peak voltage t = 10ms; d = 20% 2 a t rr reverse recovery time if= 625ma di/dt = 25a/ms 200 ns t fr forward recovery time 50 ns
electrical specifications L6375S 8/17 2.4 switching waveform figure 3. switching waveform 2.5 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 t max = 150 o c (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 t max - t hys = 130 o c (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 su pply voltage is continuously monitored to provide an under voltage protection. as v s falls below v sth -v shys (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 ex ceeds vsth. the hysteretic behavior prevents intermittent operation at low supply voltage.
L6375S electrical specifications 9/17 2.8 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 i sc (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 (c don ) connected to the on delay pin according to the following formula: t on = 1.28 sec/pf for 50pf< c don < 2nf after the t on interval has expired the output power mos is switched off for the t off time interval with: t off = 64 t on . 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 i sc ) for another t on , 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 misl eading short circuit informatio n 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 (kee ping ton = 0 but with th e 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
electrical specifications L6375S 10/17 2.9 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 ta bl e . 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). 2.10 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 absor bed from an inductive load is specified as 200mj (at t j = 85c) 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 (i o < i old ) l h l h h l h h short to v s l h h h l l h h short circuit to ground (i o = i sc ) (1) (pin on-delay grounded) 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. 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 (v s < v sth2 ) l h l l l l l l
L6375S application circuits 11/17 3 application circuits figure 5. inductive load equivalent circuit figure 6. external demagnetisation circuit (versus ground)
application circuits L6375S 12/17 figure 7. external demagnetisation circuit (versus vs) figure 8. application schematic (iec 61000-4-5) (iec 61000-4-6) on-delay
L6375S package mechanical data 13/17 4 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
package mechanical data L6375S 14/17 table 7. so-8 mechanical data figure 9. package dimensions dim. mm inch min typ max min typ max a 1.75 0.068 a1 0.1 0.25 0.003 0.009 a2 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 0.023 s 8o (max.)
L6375S package mechanical data 15/17 figure 10. so-8 tape and reel information
revision history L6375S 16/17 5 revision history table 8. 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
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