LB1962资料

UTC LB1962 LINEAR INTEGRATED CIRCUIT

SINGLE-PHASE FULL-WAVE MOTOR DRIVER IC

DESCRIPTION

The UTC LB1962 is a Single-phase full-wave motor driver designedspecially 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

IN-IN+CTOUT1GND

12345UTC LB196210FG9876HBSTVccOUT2

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UTC LB1962 LINEAR INTEGRATED CIRCUIT

BLOCK DIAGRAM

CT0.47 to 1μFThermal protectioncircuitDischargepulseVccHALLIN+IN-Hysteresis amplifierFGDelay circuitControlcircuitDelay circuitOUT1OUT2MHBThermal protectioncircuitSTART/STOPSTGND

ABSOLUTE MAXIMUM RATINGS

(Ta=25℃)

PARAMETER SYMBOL RATINGS UNIT Maximum Supply voltage VCC(max) 17 V Maximum Output current IOUT(max) 0.5 A Maximum Output withstand voltage VOUT(max) 15 V Maximum output withstand voltage VF(max) 17 V IF(max) 5 mA Maximum output current

IR(max) 5 mA HB maximum output current IB(max) 10 mA ST maximum input voltage VST(max) 15 V Allowable power dissipation (With specified substrate*) PD 850 mW Operating Temperature Range TOPR -30 ~ +85 ℃ Storage Temperature Range TSTG -40 ~ +150 ℃

3

*Specified substrate: 114.3×76.2×1.5mm glass epoxy.

RECOMMANDED OPERATING RATINGS

(Ta=25℃)

PARAMETER SYMBOL RATINGS UNIT Power supply voltage VCC 3.8 ~ 16.8 V ST input High level voltage STH 3 ~ 14 V ST input Low level voltage STL -0.3 ~ +0.4 V Hall input common mode voltage range VICM 0.2 ~ Vcc-1.5 V

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UTC LB1962 LINEAR INTEGRATED CIRCUIT

ELECTRICAL CHARACTERISTICS

(Ta=25℃, VCC=5V)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAXUNIT

In drive mode ( CT=［L］, ST=［L］) 6.5 9.1 mA In lockup protection mode

Current drain ICC 2.2 3.1 mA ( CT=［H］, ST=［L］)

In standby mode ( ST=［H］) 110 150 µA Lockup detection

ICT1 1.9 2.8 3.7 µA Capacitor charge current Capacitor discharge current ICT2 0.32 0.46 0.60 µA Capacitor charge/discharge current 12

RCT RCD=ICT/ICT 5.0 6.0 7.0 ratio

CT charge voltage VCT1 2.55 2.75 2.95 V 2

CT discharge voltage VCT 1.6 1.8 2.0 V Output Low level voltage VOL IO200mA 0.2 0.3 V Output High level voltage VOH IO200mA 3.9 4.1 V ==Zero peak value

=Hall input sensitivity VHN 7 15 mV (Including offset and hysteresis) =Output pin Low voltage VFG IRD, IFG5mA 0.1 0.3 V Output pin leakage current IFGL VRD, VFG15V 30 µA ==HB output Low voltage VHBL IHB5mA 1.0 1.3 V ST pin input current IST VST5V 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 L Rotating L H L H L L

Lockup protection

H off off L activated

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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.

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UTC LB1962 LINEAR INTEGRATED CIRCUIT

SAMPLE APPLICATION CIRCUIT

C2VccHIN-IN+HBSTCTFGOUT1OUT2C10.47 to 1μFGND

Startup

Power-onVccOUT

CT

FG

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UTC LB1962 LINEAR INTEGRATED CIRCUIT

Locked-up protection and automatic recovery curves

LockedOutput ONReleasedOUT

FG

CT

Start or stop curve

STOUTFG

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UTC LB1962 LINEAR INTEGRATED CIRCUIT

TYPICAL CHARACTERISTION

1000Allowable power dissipation, Pd max (mW)Pdmax - TaSpecified substrate (114.3×76.2×1.5mm3 glass epoxy)850

800

Current drain, Icc (mA)10

IN-=L+IN=L12

Icc - Vcc8

600

510400

6

4

CT=H200

2

ST=H0-20

0

602040

Ambient temperature, Ta (℃)

80100

0

024

8166141012

Power supply voltage, Vcc (V)

182022

Vo(sat)L - Io

0.5Lower ride output saturation voltage,Vo (sat)L (V)Vcc=3.8VTa=25℃0.4

Input current, IIN (µA)400500

Vcc=5VIIN-VIN0.3300

0.2200

0.1100

0

0

200100

Output current, Io (A)

300400

0

0246

8101412Input voltage, VIN (V)

161820

Vo(sat)H - Io

Upper side output saturation voltage, Vo(sat)H (V)1.0

Vcc=3.8VTa=25℃0.8

0.81.0

Vcc=3.8VTa=25℃VRD, VHB - IRD, IHB

HB0.4

VRD, VHB (V)0.60.6

0.4

0.20.2

RD0

0100

200300Output current, Io (mA)

400500

0

024

68IRD, IHB (mA)

101214

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UTC LB1962 LINEAR INTEGRATED CIRCUIT

UTC assumes no responsibility for equipment failures that result from using products at values thatexceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, orother parameters) listed in products specifications of any and all UTC products described or containedherein. UTC products are not designed for use in life support appliances, devices or systems wheremalfunction of these products can be reasonably expected to result in personal injury. Reproduction inwhole or in part is prohibited without the prior written consent of the copyright owner. The informationpresented in this document does not form part of any quotation or contract, is believed to be accurateand reliable and may be changed without notice.

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