www. belling .com .cn 1 30 0ma bi - d irection r elay d riv er BL8023C description BL8023C is a bi - direction relay drive r circuit, used to control the magnetic latching relay, with large output capability , ultra - low power consumption . it can be widely used in smart meters and other pulses, level control applications . BL8023C can provide 300ma typical driving current, which will different according to the relay coil resistance. the input high level threshold of BL8023C is 3 v ; it can compatible with most single chip microcontroller . BL8023C is available in so p - 8 and dip - 8 package s . features ? 5 to 36 v input voltage range ? low power consumption (iq<1ua) ? input high level threshold : 3 v , compatible with most single chip microcontroller ? typical driving current: 30 0ma rds(on)=1 2 ohm(vin=12v, pmosfet+nmosfet) rds(on)=10ohm(vin= 3 0v, pmosfet+nmosfet) ? peak d riving c urrent: 500ma@vin=24v ? environment temperature: - 4 0 ? c ~85 ? c ? sop - 8 and dip - 8 package s applications ? smart meter typical application ordering information part no. package tape & reel BL8023C sop - 8 25 00/reel pin out & marking so p - 8 /dip8 8023s: product code ll: lot no. l: fab code ll: date code BL8023C 8 0 2 3 s l l l l l o a n c a g n d v i n b n c o b r e l a y a b l c 5 2 2 3 2 2 0 v a c a c v + r s 1 2 3 4 5 6 7 8 a c v - l n + b r i d g e
www. belling .com . cn 2 BL8023C absolute maximum rating parameter value max input voltage 40 v max operating junction temperature(tj) 1 50 ? c ambient temperature(ta) - 4 0 ? c C 12 5 ? c package thermal resistance sop - 8 ja 128 ? c / w jc 45 ? c / w storage temperature(ts) - 40 ? c - 150 ? c lead temperature & time 260 ? c , 10s note : exceed these limits to damage to the device. exposure to absolute maximum rating conditions may affect device reliability. r ecommended work conditions parameter value input voltage range max. 36 v operating junction t emperature(tj) - 4 0 ? c C 8 5 ? c electrical characteristics ( v in =5v, t a =25 ? c ) symbol parameter conditions min typ max unit v in input voltage range 5 36 v iq quiescent current 1 ua rdson switch rdson vin=12v, r l =75ohm 1 2 18 ohm vin=30v, r l =75ohm 10 16 ohm vin=12v, r l = 40 ohm 12 20 ohm vin=30v, r l = 40 ohm 1 10 16 ohm v th o n input high voltage vin=12v 3 v r in equivalent input resistor 500 kohm v sd fly - wheel d iode forward voltage is=1a 1 .2 2 v t r rise time v in =12v, r l = 75 ohm 40 ns t d(on) turn on delay time vin=12v, r l =75ohm 60 ns t f fall time vin=12v, r l =75ohm 30 ns t dioff) turn off delay time vin=12v, r l =75ohm 70 ns note : 1) this condition is not suit able for sot23 - 6 package. 2) input rise/fall time must less than 1ms, otherwise maybe destroy the chip. logic function table input a input b output oa output ob relay response 1 0 1 0 on 0 1 0 1 off 0 0 high - impedance high - impedance hold 1 1 high - impedance high - impedance hold
www. belling .com . cn 3 BL8023C pin description pin # name description 1 oa output a 2, 6 nc not connected. 3 a input a 4 gnd ground. 5 ob output b 7 b input b 8 vin supply input voltage electrical performance tested under ta=25 ? c , unless otherwise specified turn on delay and rise time turn off delay and fall time ch1 --- input ch2 --- output ch1 --- input ch2 --- output 0 200 400 600 800 1000 1200 1400 0.0 0.5 1.0 1.5 2.0 i(ma) v sd (v) forward voltage 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 5 10 15 20 25 30 35 40 vth(v) vin(v) vth vs. vin
www. belling .com . cn 4 BL8023C block diagram detailed description pulse triggering if input is driven by square pulse, connect the inputs to the pulse source directly. relay will operate as logic table stated (vin should be less than the power supply voltage, rs is current - limiting resistor, it can be ignored in the voltage is below 20v, i.e. rs=0). the recommended pulse width=100ms. the length of the intervals should be longer than 100ms. these intervals include: intervals between forward drive pulse and next backward drive pulse, intervals between forward drive pulse and next forward drive pulse, intervals between backward drive pulse and next forward drive pulse, intervals between backward drive pulse and next backward drive pulse. inputa inputb pulse width =100m s pulse w idth =100m s interval interval forward drive/open backward drive/close inputa inputb pulse width =100m s interval forward drive/open forward drive/open pulse width =100m s interval
www. belling .com . cn 5 BL8023C pulse triggering application diagram relay free - wheel relay from on to off, the energy stored in the relay inductor released by the chip s internal body diode and the relay inductor. until the end of the release of this energy , relay proceeding to the next operation . BL8023C r e l a y a b l c 5 2 2 3 2 2 0 v a c a c v + r s 1 2 3 4 5 6 7 8 a c v - l n + b r i d g e
www. belling .com . cn 6 BL8023C package outline package sop - 8 devices per reel 2500 unit mm package specification: package dip - 8 devices per reel unit mm package specification:
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