UTC LB1962 LINEAR INTEGRATED CIRCUIT SINGLE-PHASE FULL-WAVE MOTOR DRIVER IC DESCRIPTION The UTC LB1962 is a Single-phase full-wave motor driver designed specially for small DC fans. For example, CPU cooling fans. FEATURES * Wide operating voltage 5V or12V are both acceptable * Built-in Hall amplifier and Hall bias circuit. * Built-in lockup and thermal protection with automatic recovery circuits * Rotation detection output * start/stop pin for standby mode control. MSOP-10 *Pb-free plating product number: LB1962L PIN CONFIGURATION UTC www.unisonic.com IN- 1 IN+ 2 CT 3 OUT1 GND 10 FG 9 HB 8 ST 4 7 Vcc 5 6 OUT2 UTC LB1962 UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R109-017,A UTC LB1962 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM CT Thermal protection circuit 0.47 to 1μF FG Discharge pulse Vcc HALL IN+ IN- Delay circuit Hysteresis amplifier HB OUT2 Control circuit M Delay circuit OUT1 Thermal protection circuit START/STOP ST GND ABSOLUTE MAXIMUM RATINGS (Ta=25℃) PARAMETER Maximum Supply voltage Maximum Output current Maximum Output withstand voltage Maximum output withstand voltage Maximum output current HB maximum output current ST maximum input voltage Allowable power dissipation (With specified substrate*) Operating Temperature Range Storage Temperature Range *Specified substrate: 114.3×76.2×1.5mm3 glass epoxy. SYMBOL VCC(max) IOUT(max) VOUT(max) VF(max) IF(max) IR(max) IB(max) VST(max) PD TOPR TSTG RATINGS 17 0.5 15 17 5 5 10 15 850 -30 ~ +85 -40 ~ +150 UNIT V A V V mA mA mA V mW ℃ ℃ SYMBOL VCC STH STL VICM RATINGS 3.8 ~ 16.8 3 ~ 14 -0.3 ~ +0.4 0.2 ~ Vcc-1.5 UNIT V V V V RECOMMANDED OPERATING RATINGS (Ta=25℃) PARAMETER Power supply voltage ST input High level voltage ST input Low level voltage Hall input common mode voltage range UTC www.unisonic.com UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R109-017,A UTC LB1962 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Ta=25℃, VCC=5V) PARAMETER SYMBOL Current drain ICC 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 VCT 2 VCT VOL VOH Hall input sensitivity VHN Output pin Low voltage Output pin leakage current HB output Low voltage ST pin input current VFG IFGL VHBL IST ICT TEST CONDITIONS In drive mode ( CT=［L］, ST=［L］) In lockup protection mode ( CT=［H］, ST=［L］) In standby mode ( ST=［H］) MIN TYP 6.5 MAX 9.1 UNIT mA 2.2 3.1 mA 110 150 µA 1.9 2.8 3.7 µA 0.32 0.46 0.60 µA 5.0 6.0 7.0 2.55 1.6 2.75 1.8 0.2 4.1 2.95 2.0 0.3 V V V V 7 15 mV 0.1 0.3 30 1.3 100 V µA V µA 1 ICT2 RCT 1 RCD=ICT /ICT 2 1 IO=200mA IO=200mA Zero peak value (Including offset and hysteresis) IRD, IFG=5mA VRD, VFG=15V IHB=5mA VST=5V 3.9 1.0 75 TRUTH TABLE ST H L IN- IN+ CT H L L H L H UTC www.unisonic.com OUT1 off H L OUT2 off L H off off FG off H L UNISONIC TECHNOLOGIES HB off Mode Standby L Rotating L Lockup protection activated CO., LTD. 3 QW-R109-017,A UTC LB1962 LINEAR INTEGRATED CIRCUIT DESIGN REFERENCE (1) VCC pin Power supply pin for whole IC. (2) OUT1, OUT2 pins Single-phase coil output pins. Bipolar forward or reverse drive output determined by OUT1 or OUT2 high. Built-in regenerative circuit that regenerates kickback current between lower side NPN outputs if a diode is used for protection against reverse connection. (3) IN–, IN+ pins Hall signal input pins The Hall signal is amplified into a square wave by the Hall amplifier with hysteresis characteristics of ±3.5 mV (typ.). The Hall signal amplitude should be 70 mV or more. (4) CT pin This pin serves timing capacitor connecting pin between CT and GND. The capacitor determines timing of the built-in lockup protection circuit for preventing coil burnout when motor is locked. Once normal motor rotating condition is restored, the automatic recovery circuit will reset itself. Adjusting 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) Connecting this pin to ground when lockup function is not used (6) FG pin 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). 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 junction temperature Tj of IC is or over about 150℃, output current limiter is activated to protect against damage. UTC www.unisonic.com UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R109-017,A UTC LB1962 LINEAR INTEGRATED CIRCUIT SAMPLE APPLICATION CIRCUIT C2 Vcc H IN - FG IN+ OUT1 HB OUT2 ST CT C1 0.47 to 1μF GND Startup Power-on Vcc OUT CT FG UTC www.unisonic.com UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R109-017,A UTC LB1962 LINEAR INTEGRATED CIRCUIT Locked-up protection and automatic recovery curves Locked Output ON Released OUT FG CT Start or stop curve ST OUT FG UTC www.unisonic.com UNISONIC TECHNOLOGIES CO., LTD. 6 QW-R109-017,A UTC LB1962 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTION Pdmax - Ta Icc - Vcc 12 Specified substrate (114.3×76.2×1.5mm3 glass epoxy) 850 800 10 Current drain, Icc (mA) Allowable power dissipation, Pd max (mW) 1000 600 510 400 200 IN- =L 8 + IN =L 6 4 CT=H 2 ST=H 0 -20 60 20 40 Ambient temperature, Ta (℃) 0 80 0 100 0 4 2 Vo(sat)L - Io Vcc=5V 0.3 0.2 0.1 300 200 100 200 100 Output current, Io (A) 0 300 0 400 0 4 2 6 Vo(sat)H - Io 1.0 Vcc=3.8V Ta=25℃ Vcc=3.8V Ta=25℃ 0.8 0.8 0.6 0.6 0.4 8 10 14 12 Input voltage, VIN (V) 18 16 20 VRD, VHB - IRD, IHB 1.0 VRD, VHB (V) Upper side output saturation voltage, Vo(sat)H (V) 22 400 0.4 0 20 IIN-VIN 500 Vcc=3.8V Ta=25℃ Input current, IIN (µ A) Lower ride output saturation voltage,Vo(sat)L (V) 0.5 18 8 16 6 14 10 12 Power supply voltage, Vcc (V) HB 0.4 0.2 0.2 RD 0 0 100 UTC www.unisonic.com 200 300 Output current, Io (mA) 400 500 0 0 2 UNISONIC TECHNOLOGIES 4 6 8 IRD, IHB (mA) 10 CO., LTD. 12 14 7 QW-R109-017,A UTC LB1962 LINEAR INTEGRATED CIRCUIT UTC 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 UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UTC www.unisonic.com UNISONIC TECHNOLOGIES CO., LTD. 8 QW-R109-017,A