LB1962 UTC | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 8

Technical content

UTC LB1962 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 1 www.unisonic.com QW-R109-017,A 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 LB1962 5 6 10IN- IN+ CT OUT1 GND OUT2 Vcc ST HB FG

UTC LB1962 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 2 www.unisonic.com QW-R109-017,A BLOCK DIAGRAM Thermal protection circuit Thermal protection circuit Control circuit Hysteresis amplifier Delay circuit Delay circuit START/STOP M OUT1 OUT2 ST GND HALL Vcc IN+ IN- HB 0.47 to 1μF CT Discharge pulse FG ABSOLUTE MAXIMUM RATINGS (Ta=25 )℃ PARAMETER SYMBOL RATINGS UNIT Maximum Supply voltage V CC(max) 17 V Maximum Output current I OUT(max) 0.5 A Maximum Output withstand voltage V OUT(max) 15 V Maximum output withstand voltage V F(max) 17 V IF(max) 5 mA Maximum output current IR(max) 5 mA HB maximum output current I B(max) 10 mA ST maximum input voltage V ST(max) 15 V Allowable power dissipation (With specified substrate*) P D 850 mW Operating Temperature Range T OPR -30 ~ +85 ℃ Storage Temperature Range T STG -40 ~ +150 ℃ *Specified substrate: 114.3×76.2×1.5mm3 glass epoxy. RECOMMANDED OPERATING RATINGS (Ta=25 )℃ PARAMETER SYMBOL RATINGS UNIT Power supply voltage V CC 3.8 ~ 16.8 V ST input High level voltage ST H 3 ~ 14 V ST input Low level voltage ST L -0.3 ~ +0.4 V Hall input common mode voltage range V ICM 0.2 ~ Vcc-1.5 V

UTC LB1962 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 3 www.unisonic.com QW-R109-017,A

ELECTRICAL CHARACTERISTICS

(Ta=25℃, VCC=5V) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT 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 Current drain I CC In standby mode ( ST=［H］) 110 150 µA Lockup detection Capacitor charge current ICT 1 1.9 2.8 3.7 µA Capacitor discharge current I CT 2 0.32 0.46 0.60 µA Capacitor charge/discharge current ratio RCT R CD=ICT 1/ICT 2 5.0 6.0 7.0 CT charge voltage V CT 1 2.55 2.75 2.95 V CT discharge voltage V CT 2 1.6 1.8 2.0 V Output Low level voltage V OL I O=200mA 0.2 0.3 V Output High level voltage V OH I O=200mA 3.9 4.1 V Hall input sensitivity V HN Zero peak value (Including offset and hysteresis) 7 15 mV Output pin Low voltage V FG I RD, IFG=5mA 0.1 0.3 V Output pin leakage current I FGL V RD, VFG=15V 30 µA HB output Low voltage V HBL I HB=5mA 1.0 1.3 V ST pin input current I ST V ST=5V 75 100 µA TRUTH TABLE ST IN - IN + CT OUT1 OUT2 FG HB Mode H off off off off Standby H L H L H L H L L H L L Rotating L H off off L Lockup protection activated

UTC LB1962 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 4 www.unisonic.com QW-R109-017,A 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 LB1962 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 5 www.unisonic.com QW-R109-017,A SAMPLE APPLICATION CIRCUIT IN- 0.47 to 1μF H IN+ HB ST CT GND FG OUT1 OUT2 Vcc Startup Vcc OUT CT FG Power-on

UTC LB1962 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 6 www.unisonic.com QW-R109-017,A Locked-up protection and automatic recovery curves Locked Output ON Released OUT FG CT Start or stop curve ST OUT FG

UTC LB1962 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 7 www.unisonic.com QW-R109-017,A TYPICAL CHARACTERISTION 1000 0-20 40 20 200 850 600 60 100 Pdmax - Ta Ambient temperature, Ta ( )℃ Allowable power dissipation, Pd max (mW) 400 800 Specified substrate (114.3×76.2×1.5mm3 glass epoxy) 510 206 4 8 12 Icc - Vcc Power supply voltage, Vcc (V) Current drain, Icc (mA)4

8 IN-=L

IN+=L CT=H ST=H 0.5 1000 300200 0.4 0.2 400 Vo(sat)L - Io Output current, Io (A) Lower ride output saturation voltage,V o(sat)L (V) 0.1 0.3 Vcc=3.8V Ta=25℃ 500 206 4 100 400 200 8 12 IIN-VIN Input voltage, VIN (V) Input current, IIN (µ A) 300 14 16 18 20 Vcc=5V 1.0 1000 300200 0.8 0.4 400 500 Vo(sat)H - Io Output current, Io (mA) Upper side output saturation voltage, Vo(sat)H (V) 0.2 0.6 Vcc=3.8V Ta=25℃ 1.0 206 4 0.2 0.8 0.4 81 2 VRD, VHB - IRD, IHB IRD, IHB (mA) VRD, VHB (V) 0.6 Vcc=3.8V Ta=25℃ HB RD

UTC LB1962 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 8 www.unisonic.com QW-R109-017,A UTC assumes no responsib ility 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.