bi-directional motor driver with brake function and thermal shut down function m54543AL mitsubishi ics (av common) description the m54543AL is a semiconductor ic capable of directly driving a smallsize bi-directional motor for forward/reverse rotation. features wide operating voltage range (vcc = 4v to 16v) direct drive capability by ttl, pmos and cmos ic outputs low output saturation voltage (large voltage across motor) built-in clamp diode large output current drive (io (max) = 1.5a) with brake function built-in thermal shut-down protector circuit application commercial-use equipment, audio such as tape recorder or radio cassette recorder, and vcr. functional description the m54543AL is an ic for driving a smallsize bi-directional motor for forward/reverse rotation. when both of inputs 1 and 2 are "l", outputs 1 and 2 are "off". when input 1 is "h" and input 2 is "l", output 1 is "h" and output 2 is "l" (forward rotation). when input 1 is "l" and input 2 is "h", output 1 is "l" and output 2 is "h" (reverse rotation). when both of inputs 1 and 2 are "h", both of outputs 1 and 2 are "l" (braking). the ic is provided with a control circuit power supply (vcc) and an output power supply (vcc') independently. the motor rotation speed can be changed by operating vcc and vcc' from a separate supply and varying the voltage of vcc or vcc'. the ic is also provided with a built-in thermal protector circuit to protect it from thermal destruction in case of abnormal condition such as motor blocking. block diagram pin configuration (top view) outline 9p9 1 9 2 3 4 5 6 7 8 power supply 1 v cc1 power supply 2 v cc2 driver power supply 1 v cc ' 1 output 2 o 2 input 1 in 1 gnd input 2 in 2 output 1 o 1 driver power supply 2 v cc ' 2 logic truth table input output in 1 in 2 o 1 o 2 l l open h l h l ex.forward l h l h ex.reverse h h l l braking note "off" state "off" state 3 5 driver power supply 2 v cc ' 2 output 1 o 1 output 2 o 2 gnd 4 driver power supply 1 v cc ' 1 power supply 1 v cc 1 in 1 input 1 8 6 power supply 2 v cc2 in 2 input 2 thermal shut down 2 7 9 1 control circuit datasheet.in
bi-directional motor driver with brake function and thermal shut down function m54543AL mitsubishi ics (av common) absolute maximum ratings (ta=25 c, unless otherwise noted) symbol parameter conditions ratings unit v cc (1) supply voltage (1) -0.5 to +16 v v cc (2) supply voltage (2) with an external heat sink (3000mm 2 1.5mm) -0.5 to +20 v v cc ' driver supply voltage -0.5 to +16 v v i input voltage 0 to v cc v v o output voltage -0.5 to v cc '+2.5 v i o (max) peak output current top=10ms : repetitive cycle 0.2hz max 1.5 a i o (1) continuous output current (1) 330 ma i o (2) continuous output current (2) with an external heat sink (3000mm 2 1.5mm) 600 ma p d power dissipation ta=75 c 1.15 w t opr operating temperature -10 to +75 c t stg storage temperature -55 to +125 c electrical characteristics (ta=25 c, unless otherwise noted) symbol parameter i o (leak) output leak current v oh (1) "h" output saturation voltage (1) v cc =v cc '=12v v oh (2) "h" output saturation voltage (2) v cc =v cc '=12v v ol (1) "l" output saturation voltage (1) v cc =v cc '=12v v ol (2) "l" output saturation voltage (2) v cc =v cc '=12v i ih (1) "h" input current (1) i ih (2) "h" input current (2) i cc supply current m a v v v v m a m a ma v cc =v cc '=20v v i1 =v i2 =0v v i1 =2v v i2 =0v v i1 =0v v i2 =2v v i1 =0v v i2 =2v v i1 =v i2 =2v v i1 =2v v i2 =0v v i1 =v i2 =2v v o =20v v o =0v v cc =v cc '=12v, v i1 =2v, v i2 =0v v cc =v cc '=12v, v i1 =0v , v i2 =2v v cc =v cc ' =16v output open v i1 =2v , v i2 =0v v i1 =0v , v i2 =2v v i1 =v i2 =2v v i1 =v i2 =0v i oh (1) =-200ma i oh (1) =-500ma i oh (2) =-200ma i oh (2) =-500ma i ol (1) =200ma i ol (1) =500ma i ol (2) =200ma i ol (2) =500ma 100 -100 10.8 11.2 10.7 11.1 10.8 11.2 10.7 11.1 0.2 0.5 0.95 1.35 0.95 1.35 0.2 0.5 0.95 1.35 0.95 1.35 50 120 50 120 20 20 4 test conditions limits min. typ. max. unit recommended operating conditions (ta=25 c, unless otherwise noted) limits min. typ. max. symbol parameter test conditions unit v cc supply voltage 4 12 15 v i o continuous output current 300 ma v ih "h" input voltage 2 v cc v v il "l" input voltage 0 0.4 v t b motor braking interval 10 100 ms t j (shut) thermal shutdown temperature v cc 3 7v 150 c datasheet.in
bi-directional motor driver with brake function and thermal shut down function m54543AL mitsubishi ics (av common) typical characteristics 0 0 -600 1.0 0.2 0.4 0.6 -500 -400 -300 -200 -100 0.8 v cc =v cc '=12v ta=75 c ta=25 c ta=-20 c "h" output saturation "h" output voltage v cc '-v oh (v) "l" output saturation "l" output voltage v ol (v) 0 0 600 1.0 0.2 0.4 0.6 500 400 300 200 100 0.8 ta=25 c ta=-20 c ta=75 c v cc =v cc '=12v 0 0 8 6 4 2 100 25 50 75 free air thermal derating (maximum rating) ambient temperature ta ( c) 25cm 2 1.5mm (t) aluminum heat sink datasheet.in
bi-directional motor driver with brake function and thermal shut down function m54543AL mitsubishi ics (av common) application examples 1) motor speed control by v cc and v cc ' 9 1 8 7 6 5 4 3 2 m m54543AL r 1 =2 w r 2 =3 w v b input 2 c 10 to 100 m f input 1 2) motor speed control by the v cc ' 9 1 8 7 6 5 4 3 2 m m54543AL 2 w v cc input 2 c 1 to 10 m f input 1 c 10 to 100 m f 3) motor speed control by the v cc 9 1 8 7 6 5 4 3 2 m m54543AL input 2 c 10 to 100 m f input 1 1 to 10 m f 2 w v cc ' c precautions for application (1) if the motor resistance is high (small output current: several tens of ma at a light load) and vcc is greater than vcc' in application examples 2) and 3), current may counter-flow from the vcc pin to the vcc' pin. the motor can work at a light load even when the vcc' pin is opened. for light-load applications, use the m54544al. the thermal protection of the ic may not work depending on an abnormal condition (such as oscillation, low supply voltage or output short). when using the function, check its operation in the actual using state. if the motor has a large counter electromotive force at a braking time, etc., the internal parasitic di may malfunction. if fly-back current of 1a or more flows, put a shottkey di between the output and the gnd. remember that the ic has an about 10 m s delay in output switching for high-speed applications such as pwm. (2) as far as motor control and driver ic's are concerned, some possibilities are considered for these ic's to cause such unexpected cases as fire or smoke if they are used beyond its ratings in datasheet or used, even transiently, under the overload conditions. so your action will be highly appreciated to fully look into the rating limits and the using conditions before you use these ic's. and if these ic's are to be used under the conditions out of our specifications, please never fail to give us a contact as to under what conditions they are used. datasheet.in
|
