LB1860, LB1860M, LB1861, LB1861M www.onsemi.com Monolithic Digital IC Two-Phase Half-Wave Variable Speed Fan Motor Driver Overview The LB1860 series ICs are drivers for two-phase unipolar drive DC brushless fan motors. They have functions such as driving, lock protection, restart and speed control. Features Two-speed mode select function requiring less external component PDIP10 / DIP10S (300 mil) additions : Full speed and Low speed. Or, thermistor-controlled LB1860, LB1861 continuous variable-speed function according to ambient operation temperatures. Motor starts rotating at a low speed. Motor lock protection and automatic return circuit built in Output transistors: Output current IO = 1.5 A, output circuit protection Zener diodes (LB1860 : M-Vz = 57 V/ LB1861: M-Vz = 32 V) Enables low-level noise protection with chip capacitor. SOIC14 W / MFP14S (225 mil) Built-in thermal shutdown circuit Built-in rotation detect function LB1860M, LB1861M (Drive mode: L, Stop mode: H) The LB1860 series can be operated from either 12 V or 24 V power supply by changing an external resistor. (Strong protection against power supply surge) Connectable direct to a Hall element ORDERING INFORMATION See detailed ordering and shipping information on page 9 of this data sheet. Semiconductor Components Industries, LLC, 2017 1 Publication Order Number : August 2017 - Rev. 1 LB1860 60M 61 61M/D LB1860, LB1860M, LB1861, LB1861M Specifications Absolute Maximum Ratings at Ta = 25 C, ( ): LB1860M, LB1861M Parameter Symbol Conditions Ratings Unit Maximum input current I max t 20 ms 200 mA CC Output supply voltage V Internal V OUT Output current I 1.5 A OUT RD flow-in current I 10 mA RD RD supply voltage V 50 V RD Pd1 max 1.1 W Allowable power dissipation Pd2 max Mounted on 20 15 1.5 mm glass epoxy board (0.8) W Operating temperature Topr 30 to +80 C Storage temperature Tstg 55 to +125 C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Allowable Operating Ranges at Ta = 25 C Parameter Symbol Conditions Ratings Unit Input current range I 6.0 to 50 mA CC Common-mode input voltage range V 0toV 1.5 V ICM IN Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. Electrical Characteristics at Ta = 25 C, I =10mA CC Parameter Symbol Conditions min typ max Unit LB1860, 1860M: I =0.1A 54 57 60 V O Output limiting voltage V 1 OLM LB1861, 1861M: I =0.1A 30 32 34 V O V I = 0.5 A 0.95 1.2 V O sat1 O Output saturation voltage V I = 1.0 A 1.15 1.5 V O sat2 O V I = 1.5 A 1.4 2.0 V O sat3 O Input voltage V I = 7.0 mA 6.4 6.7 7.0 V IN CC Amp input offset voltage V 7.0 0 7.0 mV OFF Amp input bias current I 250 nA BA RD output saturation V (sat) I = 5 mA 0.15 0.3 V RD RD voltage C flow-out current I 1 C = GND 2.7 3.9 5.0 A C C discharge current I2C=V 0.35 0.50 0.65 A C IN V 1 0.77 0.8 V 0.83 V Comparator input threshold TH IN voltage V 2 0.44 0.47 V 0.50 V TH IN Ct discharge voltage Vct 0.18 0.2 V 0.22 V IN Rt input current I V = GND 440 350 240 A RT RT Rt comparator voltage V R = OPEN 0.59 0.62 V 0.65 V RT T IN Thermal protection circuit TSD Design target 180 C operating voltage Thermal protection circuit TSD Design target 40 C hysteresis Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. www.onsemi.com 2