rev. 4762a?auto?11/03 features three input comparators with schmitt-trigger characteristic input clamping current capability of 10 ma integrated protection cells (emc, esd, rf) dedicated to all input stages common shutdown by junction-temperature monitor reset with hysteresis at low voltage esd protection acording to human body model: 2000 v (c = 100 pf, r = 1.5 k ? ) output stages: ? short-circuit protected ? load-dump protected at 1 k ? ? no crosstalk on adjacent channels ? jump start possible description the triple driver ic includes three non-inverted and current-limited output stages with an open collector. common thermal shutdown protects the outputs against critical junction temperatures. each output can sink a current of 20 ma, parallel output opera- tion is possible. the digital inputs have schmitt-trigger function with pull-up resistors to 5 v. figure 1. block diagram under- voltage detection v s = 5 v 7 1 3 4 85 6 2 v s v i3 gnd thermal shutdown v i2 v i1 v s v o1 v o2 v o3 triple driver ic with thermal monitoring U6803B
2 U6803B 4762a?auto?11/03 pin configuration figure 2. pinning so8 1 2 3 4 8 7 6 5 vo1 gnd vo2 vo3 vi1 vs vi2 vi3 pin description pin symbol function 1 vo1 output 1 2 gnd ground 3 vo2 output 2 4 vo3 output 3 5 vi3 input 3 6 vi2 input 2 7 vs supply voltage 5 v 8 vi1 input 1
3 U6803B 4762a?auto?11/03 basic circuitry the integrated circuit U6803B requires a stabilized supply voltage (v s = 5 v 5%) to comply with its electrical characteristics. an external buffer capacitor of c = 100 nf is recommended. an integrated 14 v zener diode between v s and ground protects the supply pin. all input stages are provided with an integrated 250 k pull-up resistor and can be directly connected to a microcontroller. all output stages are open collectors, each capable of sinking 20 ma. recommended external components: pull-up resistor, r = 1 k capacitor to gnd, c = 470 pf, see figure 3 on page 4 functional description general on state: a low level at the input stage activates the corresponding output stage. off state: the internal pull-up resistor provides a high level to the input comparator and deactivates the output stage. 7 v zener diodes between each input pin and gnd are capable of 10 ma clamping currents without crosstalk on adjacent input stages. a total clamping current of 30 ma shoul d be observed with respect to the power dissipation. current limitation of the output stages and overtemperature shutdown a temperature-dependent current limitation in the range of 25 to 100 ma protects the stages in case of a short. additionally, the chip temperature is monitored. for t chip > 148 c, all outputs are disabled and automatically enabled with a hysteresis of t chip >5 c. transients and load dump an integrated 28 v zener diode protects each output stage against transients and load- dump (schaffner pulses). with the help of an external 1 k resistor, the output transistor is capable of handling the corresponding current which flows during each of these condi- tions. apart from that, the outputs are short-circuit and overload protected. low-voltage detection when the supply voltage is switched on, a power-on reset pulse is generated internally which disables all output stages until a defined supply-voltage level is reached. the low-voltage detection is provided with a hysteresis of v hyst = 0.5 v typically.
4 U6803B 4762a?auto?11/03 figure 3. application schematic v s = 5 v v i3 U6803B c c c rrr v batt 3 470 pf load 100 nf micro- controller v i2 v i1 v o3 v o2 v o1 3 1 k ? absolute maximum ratings stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability . parameters symbol value unit supply voltage v s 7.0 v ambient temperature range t amb -40 to +125 c storage temperature range t stg -50 to +150 c maximum junction temperature t j +150 c thermal resistance parameters symbol value unit junction ambient r thja 160 k/w
5 U6803B 4762a?auto?11/03 electrical characteristics v s = 5 v 5%, t amb = 27 c, reference point pin 2 (gnd), unless otherwise specified, see figure 1 on page 1 and figure 3 on page 4 parameters test conditions symbol min. typ. max. unit supply, pin 7 supply voltage v s 4.75 5.25 v supply current inputs open inputs closed to gnd i s i s 0.8 7 3.2 13 ma ma low-voltage detection threshold on off v th(on) v th(off) 3.7 3.0 4.6 3.8 v v low-voltage hysteresis v hyst 0.55 1.05 v temperature shutdown t chip 140 149 c temperature shutdown hysteresis t hyst 5 c input; pins 5, 6, 8 zener-diode protection voltage i i = 10 ma v i 6.7 8.5 v zener-diode clamping current i i 10 ma pull-up resistor r i 170 250 305 k switching threshold off on v i v i 3.3 1.8 v v hysteresis v hyst 1.5 v output; pins 1, 3, 4 zener-diode protection voltage i o = 10 ma v o 26.5 v integrated capacitor 5pf leakage current i leak 2.5 a saturation voltage (i o = 20 ma) v sat 0.7 v current limitation i limit 25 100 ma propagation delay (470 pf, 1 k , 20 v) t d 5s
6 U6803B 4762a?auto?11/03 package information ordering information extended type number package remarks U6803B-mfp so8 tube U6803B-mfpg3 so8 taped and reeled technical drawings according to din specifications package so8 dimensions in mm 5.00 4.85 0.4 1.27 3.81 1.4 0.25 0.10 5.2 4.8 3.7 3.8 6.15 5.85 0.2 85 14
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