LB1862M_09

Ordering number : EN5657D LB1862M LB1962M Overview Monolithic Digital IC For Fan Motor Single-Phase Full-Wave Driver 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 Maximum supply voltage Maximum output current Maximum output withstand voltage RD/FG maximum output withstand voltage RD/FG maximum output current HB maximum output current ST maximum input voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max IOUT max VOUT max VR/F max IR/F max IB max VST max Pd max Topr Tstg Mounted on a specified board * Conditions Ratings 17 0.5 17 17 5 10 15 850 -30 to +90 -55 to +150 Unit V A V V mA mA V mW °C °C * Specified board: 114.3mm × 76.2mm × 1.5mm, glass epoxy board. Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. 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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 Power supply voltage ST input High level voltage ST input Low level voltage Hall input common mode voltage Symbol VCC STH STL VICM Conditions Ratings 3.8 to 16.8 3 to 14 -0.3 to +0.4 0.2 to VCC-1.5 Unit V V V V Electrical Characteristics at Ta = 25°C, VCC = 5V Parameter Current drain Symbol ICC Conditions min In drive mode (CT = “L”, ST = “L”) In lockup protection mode (CT = “H”, ST = “L”) In standby mode (ST = “H”) Lockup detection capacitor charge current Capacitor discharge current Capacitor charge/discharge current ratio CT charge voltage CT discharge voltage Output Low level voltage Output High level voltage Hall input sensitivity RD/FG output pin Low voltage RD/FG output pin leakage current HB output Low voltage ST pin input current VCT1 VCT2 VOL VOH VHN VRD(FG) IRD(FG) VHBL IST IO = 200mA IO = 200mA Zero peak value (Including offset and hysteresis) IRD(FG) = 5mA VRD(FG) = 15V IHB = 5mA VST = 5V 1.0 75 3.9 2.55 1.6 2.75 1.8 0.2 4.1 7 0.1 15 0.3 30 1.3 100 2.95 2.0 0.3 V V V V mV V μA V μA ICT2 RCT RCT = ICT1/ICT2 0.32 5.0 0.46 6.0 0.60 7.0 μA ICT1 1.9 Ratings typ 6.5 2.2 110 2.8 max 9.1 3.1 150 3.7 mA mA μA μA Unit Package Dimensions unit : mm (typ) 3086B 1 Pd max -- Ta Specified board: 114.3×76.2×1.5mm3 glass epoxy board. 0.63 5.0 10 6 Allowable power dissipation, Pd max -- mW 0.85 0.8 4.4 6.4 0.6 0.4 0.41 1.7max 1 5 0.15 0.2 0.1 (1.5) 0.35 1.0 (0.5) 0 -30 -20 0 Ambient temperature, Ta -- °C 20 40 60 80 90 100 SANYO : MFP10S(225mil) PS No.5657-2/7 LB1862M,LB1962M Pin Assignment IN− 1 IN+ 2 CT 3 OUT1 4 GND 5 Top view 10 RD (FG) 9 HB LB1862M (LB1962M) 8 ST 7 VCC 6 OUT2 Block Diagram CT 0.47 to 1μF Charge / Discharge circuit RD (LB1862M) FG Discharge pulse (LB1962M) VCC IN+ IN− Delay circuit OUT2 Hysteresis amplifier HB Delay circuit OUT1 Control circuit M HALL Thermal protection circuit START/STOP ST GND Truth Table ST H INH L L IN+ L H H CT L OUT1 OFF H L OFF OUT2 OFF L H OFF OFF RD OFF L FG OFF L H L Lockup protection activated HB OFF L Mode Standby Rotating 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 Locked Output ON 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 C2 7 VCC H 1 IN− RD 10 (FG) OUT1 4 + 2 IN 9 HB LB1862M LB1962M OUT2 6 8 ST 3 CT C1=0.47 to 1μF GND 5 12 ICC -- VCC 500 IIN -- VIN VCC = 5V 10 400 Current drain, ICC -- mA 8 IN+ = L 6 Input current, IIN -- μA IN− = L 300 200 4 CT = H 2 100 ST = H 0 0 2 4 6 8 10 12 14 16 18 20 22 0 0 2 4 6 8 10 12 14 16 18 20 Power supply voltage, VCC -- V Lower side output saturation voltage, VO(sat)L -- V Upper side output saturation voltage, VO(sat)H -- V 0.5 VO(sat)L -- IO Input voltage, VIN -- V 1.0 VO(sat)H -- IO VCC = 3.8V Ta = 25°C VCC = 3.8V Ta = 25°C 0.4 0.8 0.3 0.6 0.2 0.4 0.1 0.2 0 0 100 200 300 400 0 0 100 200 300 400 500 Output current, IO -- A Output current, IO -- A PS No.5657-6/7 LB1862M,LB1962M VRD,VHB -- IRD,IHB VCC = 3.8V Ta = 25°C HB 1.0 0.8 VRD, VHB -- V 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