L9386MD dual intelligent power low side switch dual power low side driver with 2 x 5a low r dson typically 200m w @ t j = 25 c internal output clamping diodes v fb =50v for inductive recirculation limited output voltage slew rate for low emi m p compatible enable and input wide operating supply voltage range 4.5v to 45v real time diagnostic functions - output shorted to gnd - output shorted to vss - open load - load bypass - overtemperature device protection functions - overload disable - reverse battery up to -16v @ v s - thermal shutdown description the L9386MD is a monolithic integrated dual low side driver realized in an advanced multipower- bcd mixed technology. it is especially intended to drive valves in automotive environment. its in- puts are m p compatible for easy driving. particular care has been taken to protect the device against failures, to avoid electro-magnetic inter- ferences and to offer extensive real time diag- nostic. this is advanced information on a new product now in development or undergoing evaluation. details are subject to change withou t notice. january 1995 out1 out2 vs channel 2 output control overtemp r qs overload openload gnd diag2 in2 en in1 r o delay timer diagnostic control channel 1 diag1 block diagram so20 (12+4+4) ordering number: L9386MD multipower bcd technology 1/10
absolute maximum ratings (no damage or latch) symbol parameter value unit vs dc dc supply voltage -16 to 45 v vs tr transient supply voltage ( t 500ms ) 60 v v in,en input voltage ( | | 10ma | ) -1.5 to 6 v vd dc diagnostic dc output voltage ( | | 50ma | ) -0.3 to 16 v vo dc dc output voltage 45 v vo tr transient output voltage ( r l 3 4 w )60v i o output load current internal limited i or reverse output current limited by load -4 a eo switch-off energy for inductive loads (t eo = 250 m s, t = 5ms) 50 mj t jeo junction temperature during switch-off ? t = 30min 175 c t j junction temperature -40 to +150 c t a storage temperature -55 to +150 c thermal data symbol parameter value unit t jdis thermal disable junction temperature threshold 160 to 190 c r th j-pins thermal resistance junction to pins 14 c/w electrical characteristics (operating range) - the electrical characteristics are valid within the below defined operative range, unless otherwise specified. symbol parameter test condition min. typ. max. unit v s board supply voltage 4.5 12 32 v v d stabilized diagnostic output voltage -0.3 5 16 v t j junction temperature -40 150 c in1 out2 gnd gnd gnd gnd n.c. en vs gnd gnd gnd gnd n.c. diag1 in2 out1 n.c. n.c. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 diag2 pin connection (top view) L9386MD 2/10
electrical characteristics (continued) symbol parameter test condition value t j1 unit min. typ. max. is sb static standby supply current b) c) v en = l, vo vo uv 0.73 1.5 15 ma ma is dc supply current b) c) v en = v in = h 1.3 5 15 ma ma vd l diagnostic ouput low voltage b) i d = 2ma c) i d = 1ma 0.35 0.5 v id le diagnostic output leakage current vs = 0v or vs = open; vd = 5.5v t j 125 c 0.1 2 m a id diagnostic output current capability vd 16v diag = l 2 6 30 ma vo uv open load voltage threshold v en = x, v in = l 0.51 x vs 0.55 x vs 0.59 x vs v d vo uv1,2 open load difference voltage threshold b) ven = x, v in1,2 = l vs 3 vo c 3 vo uv vo c = output voltage of other channel c) vo c - 0.9v vo c - 0.7v vo c - 1.25v vo c - 1.25v vo c - 1.6v vo c - 1.8v v 1) v io uc open load current threshold a) v en = v in = h c) 100 20 320 480 ma ma io oc over load current threshold b) 5 7 a vo cl output voltage during clamping io cl 3 100ma 45 52 60 v s on,off output (fall, rise) slew rate a) fig. 2 200 1500 3200 v/ms r io internal output pull down resistor v en = l 102040k w r dson output on resistance vs > 9.5v io = 2a t j = 25 c t j = 150 c 200 300 500 m w m w v (en,in)l logic input low voltage |i en, in | 10ma b) c) -1.5 -1.5 1 0.5 v v v (en,in)h logic input high voltage 2.2 5.5 v v (en,in)hys logic input hysteresis 0.2 0.4 1 v i en enable input sink current 1v v en 5.5v 10 30 60 m a i in logic input sink current 1v v in 5.5v 40 95 180 m a t d on output delay on time a) fig. 2 4 25 m s t d off output delay off time a) fig. 2 5 15 30 m s t d h-l, diag. diag. delay output off time a) fig. 2 5 30 65 m s t d iou diagnostic open load delay time a) fig. 4 8 50 m s t dol diagnostic overload delay switch-off time a) fig. 1 50 160 300 m s a) 9v v s 16v (nominal operating range) r l 6 w , i o io oc b) 6.5v v s 16v (diagnostic operation range) c) 4.5v v s < 6.5v and 16v < v s 32v (extended operation range) 1) limit under evaluation. L9386MD 3/10
diagnostic table (operating range: 4.5v v s 32v) conditions en in out diag. normal function l h h x l h off off on (*) l l h gnd short vo typ < 0.55v l x off h load bypass d vo 1,2 3 1.25v h l off h open load io typ < 320ma h h on (*) l t j typ 3 175 c oertemperature (**) x x l h off off h l latched over load io min > 5a x h off l reset over load latch x d.c. d.c. (*) for 4.5v vs < 6.5v, io 2a diag. table is valid. (**) if one diag. status shows the overtemp. recognition, in parallel this output will be switched off internally. the corresp onding channel should be switched off additional by its input or enable signal, otherwise the overload latch will be set after t dol is passed. this behaviour will be related to the overdrop sensing which will be used as over load rec ognition. 5v t t ui io sc 5v t 5a td ol ud io io uc figure 1: diagnostic overload delay time L9386MD 4/10
5v td on td off t t c 0.85vo 0.85vs 0.15vs c vs s s u in u out v v (in)h (in)l vo on off v t d h-l diag t v diag 0.5v d d vs-vo c c vo uv figure 2: output slope. L9386MD 5/10
& & latch latch l1 l2 out1 out2 v batt. + - + - 55% vs & & r s q r s enable q r io r io in 1 in 2 vo uv1 vo uv2 figure 3: block diagram - open load voltage detection. L9386MD 6/10
td on td on td off vo u io o v en v in io u v d td io u open load current td ol open load voltage open load voltage open load current over load current io u td open load current normal operation off on normal operation latched over. load diagnostic latch reset on normal operation normal operation off figure 4: logic diagram. L9386MD 7/10
circuit description the L9386MD is a dual low side driver for induc- tive loads like valves in automotive environment. the device is enabled by a common cmos com- patible enable high signal. the internal pull down current sources at the enable and input pins protect the device in open input conditions against malfunctions. an output slope limitation for du/dt is implemented to reduce the emi. an in- tegrated active flyback voltage limitation clamps the output voltage during the flyback phase to 50v. each driver is protected against short circuit and thermal overload. in short circuit condition the output will be disabled after a short delay time t dol to suppress spikes. this disable is latched until a negative slope occure at the correspondent input pin. the thermal disable for t j > 175c of the output will be reseted if the junction tempera- ture decreases about 20c below the disable threshold temperature. for the real time error diagnosis the voltage and the current of the outputs are compared with in- ternal fixed values vo uv for off and io uc for on conditions to recognize open load (r l 3 20k w , r l > 38 w ) in on and off conditions. the diagnostic operates also in the extended supply voltage rang of 4.5v vs 32v. also the output voltages vo 1,2 are compared against each other in off condition with a fixed offset of d vo uv 1,2 to recognize gnd bypasses. to suppress mail d vo diagnoses during the fly- back phases of the compared output, the d vo di- agnostic includes a latch function. reaching the flyback clamping voltage vo c the diagnostic sig- nal is reseted by a latch. to activate again this kind of diagnostic a low signal at the correspon- dent input or the enable pin must occur (see also fig.3). the diagnostic output level in connection with dif- ferent enable and input conditions allows to recognize different fail states, like overtemp, short to vss, short to gnd, bypass to gnd and dis- connected load (see also page 7 diagnostic ta- ble). the diagnostic output is also protected against short to ud max . oversteping the over load current threshold io o , the output current will be limited in- ternally during the diagnostic overload delay switch-off time t dol . out1 out2 vs z valve z valve v batt channel 1 channel 2 output control overtemp r qs delay timer overload openload gnd diag2 in2 en diag1 in1 controller +5v r o diagnostic control p figure 5: application circuit diagram. L9386MD 8/10
so20 package mechanical data dim. mm inch min. typ. max. min. typ. max. a 2.65 0.104 a1 0.1 0.3 0.004 0.012 a2 2.45 0.096 b 0.35 0.49 0.014 0.019 b1 0.23 0.32 0.009 0.013 c 0.5 0.020 c1 45 (typ.) d 12.6 13.0 0.496 0.512 e 10 10.65 0.394 0.419 e 1.27 0.050 e3 11.43 0.450 f 7.4 7.6 0.291 0.299 l 0.5 1.27 0.020 0.050 m 0.75 0.030 s 8 (max.) L9386MD 9/10
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 f rom its use. no license is granted by implication or otherwise under any patent or patent rights of sgs-thomson microelectronics. specification mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously s upplied. sgs-thomson microelectronics products are not authorized for use as critical components in life support devices or systems with out express written approval of sgs-thomson microelectronics. ? 1996 sgs-thomson microelectronics C printed in italy C all rights reserved sgs-thomson microelectronics group of companies australia - brazil - canada - china - france - germany - hong kong - italy - japan - korea - malaysia - malta - morocco - the n etherlands - singapore - spain - sweden - switzerland - taiwan - thailand - united kingdom - u.s.a. L9386MD 10/10
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