Datasheet

UNISONIC TECHNOLOGIES CO., LTD
F1962
LINEAR INTEGRATED CIRCUIT
SINGLE-PHASE FULL-WAVE
MOTOR DRIVER IC

DESCRIPTION
The UTC F1962 is a Single-phase full-wave motor driver designed
specially for small DC fans. For example, CPU cooling fans.

FEATURES
* Wide Operating Voltage 5V or 12V 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

ORDERING INFORMATION
Ordering Number
F1962G-SM2-T
F1962G-SM2-R
F1962G-R10-T
F1962G-R10-R

Package
MSOP-10
MSOP-10
SSOP-10
SSOP-10
Packing
Tube
Tape Reel
Tube
Tape Reel
MARKING
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F1962
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LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
IN-
1
10
FG
IN+
2
9
HB
CT
3
8
ST
OUT1 4
7
VCC
GND

5
6 OUT2
BLOCK DIAGRAM
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LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (TA = 25°C, unless otherwise specified)
PARAMETER
Maximum Supply Voltage
Maximum Output Current
Maximum Output Withstand Voltage
Maximum Output Withstand Voltage
RATINGS
UNIT
17
V
0.5
A
15
V
17
V
5
mA
Maximum Output Current
5
mA
HB Maximum Output Current
10
mA
ST Maximum Input Voltage
15
V
MSOP-10
410
mW
Allowable Power Dissipation
PD
SSOP-10
(With Specified Substrate( Note 2))
500
mW
Operating Temperature
TOPR
-30 ~ +85
°C
Storage Temperature
TSTG
-40 ~ +150
°C
Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. 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)
RECOMMANDED OPERATING RATINGS (TA = 25°C, unless otherwise specified)
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
ELECTRICAL CHARACTERISTICS (TA=25°C, VCC=5V, unless otherwise specified)
PARAMETER
Current Drain
SYMBOL
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
VCT2
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
TEST CONDITIONS
In drive mode (CT=[L], ST=[L])
In lockup protection mode
(CT=[H], ST=[L])
In standby mode (ST=[H])
TYP MAX UNIT
6.5
9.1 mA
2.2
3.1
mA
110
150
μA
ICT
1
1.9
2.8
3.7
μA
ICT
2
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
RCT
RCD=ICT1/ICT2
1
IO=200mA
IO=200mA
Zero peak value
(Including offset and hysteresis)
IRD, IFG=5mA
VRD, VFG=15V
IHB=5mA
VST=5V
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MIN
3.9
1.0
75
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LINEAR INTEGRATED CIRCUIT
TRUTH TABLE
ST
H
L
IN-
IN+
CT
H
L
L
H
L
H

OUT1
off
H
L
OUT2
off
L
H
off
off
FG
off
H
L
HB
off
Mode
Standby
L
Rotating
L
Lockup protection
activated
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
Lockup protection time/automatic recovery time
:approx. 0.5s
: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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
LINEAR INTEGRATED CIRCUIT
SAMPLE APPLICATION CIRCUIT
Startup
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LINEAR INTEGRATED CIRCUIT
SAMPLE APPLICATION CIRCUIT(Cont.)
Locked-up protection and automatic recovery curves
Locked
Output ON Released
OUT
FG
CT
Start or stop curve
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VRD, VHB (V)
Input Current, IIN (µA)
Lower Ride Output Saturation
Voltage, VOUT(sat)L (V)
Current Drain, Icc (mA)
Allowable Power Dissipation, Pdmax (mW)

Upper Side Output Saturation Voltage,
VOUT(sat)H (V)
F1962
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
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F1962
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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