Ordering number : ENA2024 LB1862MC Monolithic Digital IC For Fan Motor http://onsemi.com Single-Phase Full-Wave Driver Overview Single-phase full-wave drive design and a compact package make these ICs optimal for small fans (especially CPU cooling fans). Low switching noise and effective motor drive are further advantages. Functions • Support for 5V/12V dual power supply voltage • Built-in regenerative circuit allows use of reverse connection protection diode • Built-in Hall amplifier with hysteresis (supports core without auxiliary electrode) • Built-in lockup protection and automatic recovery circuits • Latch-type lockup detection output (RD) is Low during rotation and High during stop • Hall bias pin and start/stop pin allow reduced current drain in standby mode • Built-in thermal protection circuit Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC max 17 Maximum output current IOUT max 0.5 V A Maximum output withstand voltage VOUT max 17 V RD maximum output withstand voltage VRD max 17 V RD maximum output current IRD max 5 mA mA HB maximum output current IB max 10 ST maximum input voltage VST max 15 V Allowable power dissipation Pd max 850 mW Operating temperature Topr -30 to +90 °C Storage temperature Tstg -55 to +150 °C Mounted on a specified board * * Specified board: 114.3mm × 76.2mm × 1.5mm, glass epoxy board. Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time. Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current, high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details. Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Semiconductor Components Industries, LLC, 2013 May, 2013 31412 SY 20120127-S00004 No.A2024-1/7 LB1862MC Allowable Operating Conditions at Ta = 25°C Parameter Symbol Conditions Ratings Unit Power supply voltage VCC 3.8 to 16.8 V ST input High level voltage STH 3 to 14 V ST input Low level voltage STL -0.3 to +0.4 V Hall input common mode voltage VICM 0.2 to VCC-1.5 V Electrical Characteristics at Ta = 25°C, VCC = 5V Parameter Symbol Ratings Conditions min Current drain ICC Lockup detection typ Unit max In drive mode (CT = “L”, ST = “L”) 6.5 9.1 mA In lockup protection mode (CT = “H”, ST = “L”) 2.2 3.1 mA In standby mode (ST = “H”) 110 150 μA 1.9 2.8 3.7 μA 0.32 0.46 0.60 μA 5.0 6.0 7.0 ICT1 capacitor charge current Capacitor discharge current ICT2 Capacitor charge/discharge RCT RCT = ICT1/ICT2 current ratio CT charge voltage VCT1 2.55 2.75 2.95 V CT discharge voltage VCT2 1.6 1.8 2.0 V Output Low level voltage VOL IO = 200mA 0.2 0.3 V Output High level voltage VOH IO = 200mA Hall input sensitivity VHN Zero peak value (Including offset and hysteresis) 7 15 mV RD output pin Low voltage VRD IRD = 5mA 0.1 0.3 V RD output pin leakage current IRDL VRD = 15V 30 μA HB output Low voltage VHBL IHB = 5mA 1.0 1.3 V ST pin input current IST VST = 5V 75 100 μA 3.9 4.1 V Package Dimensions unit : mm (typ) 3420 2 1.0 0.15 0.35 0.05 (1.5) 1.55 1 SANYO : MFP10SK(225mil) Allowable power dissipation, Pd max -- mW 0.5 4.4 6.2 10 0.8 MAX Pd max -- Ta 1 5.0 Specified board: 114.3×76.2×1.5mm3 glass epoxy board. 0.85 0.8 0.6 0.41 0.4 0.2 0 -30 -20 0 20 40 60 Ambient temperature, Ta -- °C 80 90 100 No.A2024-2/7 LB1862MC Pin Assignment 1 10 RD IN+ 2 9 HB CT 3 LB1862MC 8 ST OUT1 4 7 VCC GND 5 6 OUT2 Top view Block Diagram CT Charge / Discharge circuit RD Discharge pulse VCC HALL IN+ Delay circuit OUT2 Hysteresis amplifier Control circuit M HB Delay circuit OUT1 Thermal protection circuit START/STOP ST GND Truth Table ST IN- IN+ CT OUT1 OUT2 RD HB Mode H - - - OFF OFF OFF OFF Standby L L Rotating OFF L Lockup protection activated L H L L H - - L H H L L H OFF OFF Latch-type RD output is Low during rotation and High during stop. No.A2024-3/7 LB1862MC Startup Power-ON VCC OUT CT RD FG Lockup protection/automatic recovery Output ON Locked Released OUT Output OFF Output OFF RD FG CT Start/stop ST OUT Output OFF RD FG No.A2024-4/7 LB1862MC Design Reference (1) VCC pin Power supply pin for control block and motor drive. Accepts a wide operation voltage range from 3.8 to 16.8V, for 5V/12V dual power supply support. (2) OUT1, OUT2 pins Single-phase coil output pins. Bipolar drive output with upper side inverted and lower side single output. Built-in regenerative circuit regenerates kickback current between lower side NPN outputs when a diode is used for protection against reverse connection. (3) IN−, IN+ pins Hall input signal pins The Hall signal is amplified into a square wave by the Hall amplifier with hysteresis characteristics of ±3.5mV (typ.). The Hall input signal amplitude should be 70mV or more. (4) CT pin This pin serves for connecting a capacitor between CT and GND. The capacitor determines the characteristics of the built-in lockup protection circuit for preventing coil burnout in the case of motor restraint. Once normal motor load is restored, the automatic recovery circuit resets itself. Changing the capacitance alters the lockup detection time. When a 0.47 mF capacitor is connected between CT and GND Lockup detection time : approx. 0.5s Lockup protection time/automatic recovery time : approx. 0.16s (output ON) approx. 1s (output OFF) When not using lockup protection function, this pin should be connected to ground. (5) RD pin Open-collector output pin that is Low during rotation and OFF when lockup is detected. The output is a latch type which stays OFF also when the automatic recovery circuit has restored drive mode unless the rotation actually resumes. (6) ST pin and HB pin ST pin : When input to this pin is High, motor drive is stopped (OUT is high impedance). At this time, RD output indicates lockup protection mode OFF. HB pin : Hall bias switching pin. At ST pin High input, Hall bias is switched to reduce current drain in fan standby mode. If not used, both pins should be open. (7) Thermal protection circuit When internal temperature Tj of IC reaches 180°C, output current limiter is activated to protect against damage. No.A2024-5/7 LB1862MC Application Circuit Example 7 C2 VCC H 1 RD 10 (FG) + 2 IN OUT1 4 9 HB LB1862MC OUT2 6 8 ST 3 CT GND 5 ICC -- VCC 12 VCC = 5V 10 400 IN− = L 8 Input current, IIN -- μA Current drain, ICC -- mA IIN -- VIN 500 IN+ = L 6 4 CT = H 300 200 100 2 ST = H 0 0 2 4 6 8 10 12 14 16 18 20 0 0 22 2 4 VO(sat)L -- IO VCC = 3.8V Ta = 25°C 0.4 0.3 0.2 0.1 0 0 100 200 Output current, IO -- A 300 400 Upper side output saturation voltage, VO(sat)H -- V Lower side output saturation voltage, VO(sat)L -- V 0.5 6 8 10 12 14 16 18 20 Input voltage, VIN -- V Power supply voltage, VCC -- V VO(sat)H -- IO 1.0 VCC = 3.8V Ta = 25°C 0.8 0.6 0.4 0.2 0 0 100 200 300 400 500 Output current, IO -- A No.A2024-6/7 LB1862MC VRD,VHB -- IRD,IHB 1.0 VCC = 3.8V Ta = 25°C HB VRD, VHB -- V 0.8 0.6 0.4 0.2 RD 0 0 2 4 6 8 10 12 14 IRD, IHB -- mA ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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