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UTC LB1962
SINGLE-PHASE FULL-WAVE MOTOR DRIVER IC
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
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
ININ+ CT OUT1 GND
1 2 3 4 5 UTC LB1962
10 FG 9 8 7 6 HB ST Vcc OUT2
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UTC LB1962
BLOCK DIAGRAM
CT 0.47 to 1F
LINEAR INTEGRATED CIRCUIT
Thermal protection circuit
Discharge pulse Vcc HALL IN+ INHysteresis amplifier
FG
Delay circuit Control circuit Delay circuit OUT1 OUT2 M
HB
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: 114.3x76.2x1.5mm3 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
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 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
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ELECTRICAL CHARACTERISTICS
(Ta=25, VCC=5V) PARAMETER Current drain 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 Output pin Low voltage Output pin leakage current HB output Low voltage ST pin input current SYMBOL ICC
LINEAR INTEGRATED CIRCUIT
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 2.2 110 1.9 0.32 RCD=ICT /ICT
1 2
MAX 9.1 3.1 150 3.7 0.60 7.0 2.95 2.0 0.3 15 0.3 30 1.3 100
UNIT mA mA A A A
ICT
1
2.8 0.46 6.0 2.75 1.8 0.2 4.1 7 0.1 1.0 75
ICT2 RCT VCT 2 VCT VOL VOH VHN VFG IFGL VHBL IST
1
5.0 2.55 1.6
IO=200mA IO=200mA Zero peak value (Including offset and hysteresis) IRD, IFG=5mA VRD, VFG=15V IHB=5mA VST=5V
3.9
V V V V mV V A V A
TRUTH TABLE
ST H L INH L IN+ L H CT L H OUT1 off H L off OUT2 off L H off FG off H L HB off L L Mode Standby Rotating Lockup protection activated
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DESIGN REFERENCE
(1) VCC pin Power supply pin for whole IC.
LINEAR INTEGRATED CIRCUIT
(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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SAMPLE APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
C2 Vcc
H
IN
-
IN+ HB ST CT C1 0.47 to 1F GND
FG OUT1 OUT2
Startup
Power-on
Vcc OUT
CT
FG
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Locked
LINEAR INTEGRATED CIRCUIT
Output ON Released
Locked-up protection and automatic recovery curves
OUT
FG
CT
Start or stop curve
ST OUT
FG
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TYPICAL CHARACTERISTION
1000 Allowable power dissipation, Pd max (mW) Pdmax - Ta Specified substrate (114.3 x76.2x1.5mm3 glass epoxy) 850 800
LINEAR INTEGRATED CIRCUIT
12 Icc - Vcc
10 Current drain, Icc (mA)
IN- =L
+ IN =L
8
600 510 400
6
4
CT=H
200
2 ST=H
0 -20
0
60 20 40 Ambient temperature, Ta ()
80
100
0
0
2
4
8 16 6 14 10 12 Power supply voltage, Vcc (V)
18
20
22
Vo(sat)L - Io 0.5 Lower ride output saturation voltage,V o(sat)L (V) Vcc=3.8V Ta=25 0.4 Input current, IIN ( A) 400 500 Vcc=5V
IIN-VIN
0.3
300
0.2
200
0.1
100
0
0
200 100 Output current, Io (A)
300
400
0
0
2
4
6
8 10 14 12 Input voltage, V (V) IN
16
18
20
Vo(sat)H - Io Upper side output saturation voltage, Vo(sat)H (V) 1.0 Vcc=3.8V Ta=25 0.8 0.8 1.0 Vcc=3.8V Ta=25
VRD, VHB - IRD, IHB
HB
0.4
VRD, VHB (V)
0.6
0.6
0.4
0.2
0.2
RD
0
0
100
200 300 Output current, Io (mA)
400
500
0
0
2
4
6 8 IRD, IHB (mA)
10
12
14
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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.
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