Ordering number : EN5657D Monolithic Digital IC LB1862M LB1962M For Fan Motor 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. The LB1862M features a lockup detection output (RD) and the LB1962M features a rotation detection output (FG). 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 (LB1862M) • Rotation detection output (FG) (LB1962M) • 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 V Maximum output current IOUT max 0.5 A Maximum output withstand voltage VOUT max 17 V RD/FG maximum output withstand voltage VR/F max 17 V RD/FG maximum output current IR/F max 5 mA HB maximum output current IB max 10 mA ST maximum input voltage VST max 15 V 850 mW Allowable power dissipation Pd max Operating temperature Topr Mounted on a specified board * -30 to +90 °C Storage temperature Tstg -55 to +150 °C * Specified board: 114.3mm × 76.2mm × 1.5mm, glass epoxy board. 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To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer' s products or equipment. 80509 SY/21809 MS/O2599RM(KI) No.5657-1/7 LB1862M,LB1962M 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/FG output pin Low voltage VRD(FG) IRD(FG) = 5mA 0.1 0.3 V RD/FG output pin leakage current IRD(FG) VRD(FG) = 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) 3086B Pd max -- Ta 10 0.63 5.0 4.4 6.4 6 0.15 0.1 (1.5) 1.7max 5 1 0.35 1.0 Allowable power dissipation, Pd max -- mW 1 Specified board: 114.3×76.2×1.5mm3 glass epoxy board. 0.85 0.8 0.6 0.2 0 -30 -20 (0.5) 0.41 0.4 0 20 40 60 Ambient temperature, Ta -- °C 80 90 100 SANYO : MFP10S(225mil) PS No.5657-2/7 LB1862M,LB1962M Pin Assignment RD (FG) IN− 1 10 IN+ 2 9 HB CT 3 LB1862M (LB1962M) 8 ST OUT1 4 7 VCC GND 5 6 OUT2 Top view Block Diagram CT Charge / Discharge circuit 0.47 to 1μF RD (LB1862M) FG (LB1962M) Discharge pulse VCC HALL IN+ Delay circuit IN− 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 FG HB Mode H - - - OFF OFF OFF OFF OFF Standby L Rotating L Lockup protection activated L H L L H - - L H H L L H OFF OFF L L H OFF - Latch-type RD output is Low during rotation and High during stop. PS No.5657-3/7 LB1862M,LB1962M 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 PS No.5657-4/7 LB1862M,LB1962M 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 (LB1862M) 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) FG pin (LB1962M) Open-collector output pin for rotation frequency detection. When IN− = High and IN+ = Low, then FG = Low When IN− = Low and IN+ = High, then FG = High (7) 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. (8) Thermal protection circuit When internal temperature Tj of IC reaches 180°C, output current limiter is activated to protect against damage. PS No.5657-5/7 LB1862M,LB1962M Application Circuit Example 7 C2 VCC 1 IN− H RD 10 (FG) + 2 IN 9 HB OUT1 4 LB1862M LB1962M OUT2 6 8 ST 3 CT C1=0.47 to 1μF 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 PS No.5657-6/7 LB1862M,LB1962M 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 SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. 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SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of August, 2009. Specifications and information herein are subject to change without notice. PS No.5657-7/7