LB1860M-TLM-E [ONSEMI]
Two-Phase Half-Wave Variable Speed Fan Motor Driver;
| 型号： | LB1860M-TLM-E |
| 厂家： | 
ONSEMI |
| 描述： | Two-Phase Half-Wave Variable Speed Fan Motor Driver |
| 文件： | 总8页 (文件大小：138K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LB1860, LB1860M,
LB1861, LB1861M
www.onsemi.com
Monolithic Digital IC
Two-Phase Half-Wave
Variable Speed
Fan Motor Driver
Overview
The LB1860 series ICs are drivers for two-phase unipolar drive DC
brushless fan motors. They have functions such as driving, lock
protection, restart and speed control.
Features
Two-speed mode select function requiring less external component
additions : Full speed and Low speed. Or, thermistor-controlled
continuous variable-speed function according to ambient operation
temperatures.
PDIP10 / DIP10S (300 mil)
[LB1860, LB1861]
Motor starts rotating at a low speed.
Motor lock protection and automatic return circuit built in
Output transistors: Output current IO = 1.5 A, output circuit protection
Zener diodes
(LB1860 : M-Vz = 57 V/ LB1861: M-Vz = 32 V)
Enables low-level noise protection with chip capacitor.
SOIC14 W / MFP14S (225 mil)
[LB1860M, LB1861M]
Built-in thermal shutdown circuit Built-in rotation detect function
(Drive mode: ‘‘L’’, Stop mode: ‘‘H’’)
The LB1860 series can be operated from either 12 V or 24 V power
supply by changing an external resistor.
(Strong protection against power supply surge)
Connectable direct to a Hall element
ORDERING INFORMATION
See detailed ordering and shipping information on page 8 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
August 2014 - Rev. 0
1
Publication Order Number :
LB1860_60M_61_61M/D
LB1860,1860M,1861,1861M
Specifications
Absolute Maximum Ratings at Ta = 25 C, ( ): LB1860M, LB1861M
°
Parameter
Maximum input current
Symbol
max
Conditions
Ratings
200
Unit
mA
V
I
t % 20 ms
CC
Output supply voltage
Output current
V
Internal
OUT
I
1.5
10
A
OUT
RD flow-in current
RD supply voltage
I
mA
V
RD
V
50
RD
Pd1 max
Pd2 max
Topr
1.1
W
Allowable power dissipation
Mounted on 20 × 15 × 1.5 mm glass epoxy board
(0.8)
W
Operating temperature
Storage temperature
–30 to +80
–55 to +125
C
C
°
°
Tstg
Allowable Operating Ranges at Ta = 25 C
°
Parameter
Input current range
Common-mode input voltage range
Symbol
Conditions
Ratings
Unit
mA
V
I
6.0 to 50
CC
V
0 to V –1.5
IN
ICM
Electrical Characteristics at Ta = 25 C, I = 10 mA
°
CC
Parameter
Symbol
Conditions
LB1860, 1860M: I = 0.1 A
min
54
typ
max
Unit
57
32
60
34
V
V
O
Output limiting voltage
V
1
OLM
LB1861, 1861M: I = 0.1 A
30
O
V
V
V
I
I
I
I
= 0.5 A
= 1.0 A
= 1.5 A
0.95
1.15
1.4
6.7
0
1.2
1.5
2.0
7.0
7.0
V
O sat1
O sat2
O sat3
O
Output saturation voltage
V
O
V
O
Input voltage
V
= 7.0 mA
6.4
–7.0
–250
V
IN
CC
Amp input offset voltage
Amp input bias current
V
mV
nA
OFF
I
BA
RD output saturation
voltage
V
(sat)
I
= 5 mA
0.15
0.3
V
RD
RD
C flow-out current
I 1
C = GND
C = V
2.7
0.35
0.77
0.44
0.18
–440
0.59
3.9
5.0
0.65
0.83
0.50
0.22
–240
0.65
µA
µA
V
C
C discharge current
I 2
0.50
C
IN
V
1
0.8 V
Comparator input threshold
voltage
TH
IN
IN
IN
V
2
0.47 V
0.2 V
V
TH
Ct discharge voltage
Rt input current
Vct
V
I
V
= GND
RT
–350
µA
V
RT
Rt comparator voltage
V
R
= OPEN
0.62 V
RT
T
IN
Thermal protection circuit
operating voltage
TSD
Design target
Design target
180
C
C
°
°
Thermal protection circuit
hysteresis
∆TSD
40
Pin Assignments
Top view
Top view
No. 2
LB1860,1860M,1861,1861M
Block Diagram and Application Circuit
Constant
current
circuit
0.47 to 10 µ
Output timing control
(
): MFP14S
Unit (resistance: Ω, capacitance: F)
Figure 1
Truth Table
(
): LB1860M, 1861M
IN+
H
IN–
L
Ct
H
Rt1
L
Rt2
—
CR
L
OUT1
H
OUT2
L
RD
L
Mode
Full speed
L
H
H
L
—
L
L
H
L
Full speed
(H)
(L)
—
—
(L)
(H)
—
—
—
—
L
—
—
H
(H)
(H)
L
(L)
(L)
L
(H)
(L)
H
(L)
(H)
H
(L)
(L)
L
(Full speed)
(Full speed)
Low speed
Lock protection
—
—
—
H
H
H
H
Designer’s Notes
(1) Variable-speed circuit (Rt and Ct pins) — Refer to the application circuit diagram
.
The time constant gained by external components C2 and R2 is used to set the length of an ‘off’ operation time period after
phase switching. This means that the variable-speed operations can be performed by changing the ‘on’ operation time of each
phase through the duty control.
The sawtooth waveform signals are generated by the C2-R2 time constant. The voltage of this signal (Ct pin voltage) increases
from 1.3 V to 4.0 V (Vct) at each phase switching. That is, during this period, the driver becomes inactive (toff), in which
output circuit is turned off.
.
.
.
If VCC ^ 4.0 V, the driver IC remains active (ton) until the next phase switching. During this period, output circuit is turned on.
If the active drive time of each phase is assumed to ‘to’, the following relation can be established:
to
=
toff
+
ton
↑
↑
Fixed
Rotation speed
constant proportional constant
toff = 0.69 c C2 c R2 ........................................ 1
No. 3
LB1860,1860M,1861,1861M
.
.
From this relation, it can be observed that the ‘to’ and ‘ton’ are in proportional relation with each other, and that the ‘ton/to’
equals the ‘on’ time duty. As a result, a certain rotation speed can be fixed despite the fact that rotation speed exclusively
depends on each motor.
At the start, the ‘ton’ value becomes longer while the ‘toff’ value remains unchanged. This means that the ‘toff/to’ duty becomes
small enough compared to normal rotation mode. Therefore, the same start torque as that of the full speed rotation can be
obtained because the ‘on’ operation time duty increases. This enables the motor to start at a very low speed.
(2) Supply voltage (VIN pin)
.
The LB1860 has the internal parallel regulator which supplies power to the Hall amplifier circuit and the control block.
Therefore, the driver ICs are not affected by power source fluctuations and kickbacks from the motor. They maintain the stable
operations even if noise signals such as surge are generated.
Set the resistance R1 between VCC and VIN so that the ICC current of 6 mA to 50 mA can flow onto the VIN pin within the
supply voltage range of a fan motor.
.
.
VIN is 6.7 V typ at ICC = 7 mA.
The current flowing into VIN is calculated using the equation shown below.
.
VCC
– VIN
ICC
=
............................ 2
R1
.
Consideration given to surge voltage
The maximum allowable current at VIN pin is 200 mA. Therefore, the pin is designed to withstand abnormal positive voltage of:
.
Vsurge VIN + R1 × 200 mA ............................................ 3
=
(3) Hall input pin voltage (Pins IN–, IN+)
.
.
Set the voltage levels of the input pin for the Hall element output and the Hall element output voltage to within the range of
0 V to VIN – 1.5 V.
The gain between the hall input pin and the output pin is 100 dB or greater. The offset voltage of the hall input amp is ±7 mV,
therefore, the hall element output must be set with the offset voltage (±7 mV) considered.
(4) Output transistor (Pins OUT1, OUT2)
.
.
.
Output current
Output saturation voltage
Output limiting voltage
IO = 1.5 A max
VO sat = 1.15 V/1.0 A typ
VOLM = 57 V typ (LB1860, 1860M)
VOLM = 32 V typ (LB1861,1861M)
.
Since the LB1860 series have a protect zener diode between collector and base, the kickback voltage induced by the coil is cut
at VOLM = 57 V (32 V). When external capacitors are connected between OUT and GND, the capacitance should not exceed
10 µF.
(5) Output protection function (C pin)
.
Capacitor pin used in forming an automatic return circuit.
If rotation is stopped due to overload, the pin voltage level increases and then forces the output to become inactive. In this case,
after proper load adjustment, the output returns to the ‘drive’ mode from the ‘stop’ mode automatically. By changing the
capacitor value, the lock detect time period can be set.
.
For C marked with 1 µF
Lock detect time
Lock protect time (output ON)
Approximately 2 sec.
Approximately 1 sec.
(output OFF) Approximately 6 sec.
Output ON
Lock
Rotation
Output OFF
Output OFF
Lock release
Rotation
Output
ON
Automatic Return Circuit C Pin Voltage
No. 4
LB1860,1860M,1861,1861M
1
When a fan is rotating, the capacitor is charged at 4 µA (typ) and discharged through the C with pulses according to the
rotational speed.
2
3
When a fan is locked, no discharge occurs through the C and the C voltage rises, turning OFF the output at 0.8 × VIN.
When the output is turned OFF, discharge occurs through the C at 0.5 µA (typ). If the lock is not released when the C voltage
drops to VTH2, the capacitor is charged to VTH1 again. (At this moment, the output is turned ON.) These operations 2 and
3 repeated at a cycle of approximately ton : toff = 1:6 protect a motor.
4
If the lock is released when the C voltage drops to VTH2, the output is turned ON, starting rotation.
(6) Rotation detect signal (RD pin)
.
Open collector output (Drive mode: ‘‘L’’, Stop mode: ‘‘H’’)
(7) Radio noise reducing (Pins B1, B2)
.
Base pin of Darlington connection output transistor
If radio noises need to be processed properly, the following actions should be taken:
.
1 Connect a capacitor of 0.01 µ to 0.1 µF between B1 and B2.
2 Connect a capacitor of 0.001 µ to 0.01 µF between OUT and B.
If output causes oscillation, add a resistor of 200 Ω to 1 kΩ in series with a capacitor.
(8) Thermal shutdown function
.
Shutdown the driver output in case of coil short-circuiting and abnormal IC heating.
Thermistor-controlled Application Circuit Example
Use of a thermistor enables motor speed to
be sensitive to the operating ambient
temperature.
The Rt pin voltage at Ta = 20 C has
°
1.42 ms of ‘toff’ as calculated in expression
4 with the application constant of Figure 2.
However, the Rt pin voltage at Ta = 40
C
°
is reduced into less than the Vct (= 1.3 V)
level, which results in a 0 of ‘toff’. This
means the 100% duty.
Noise elimination
capacitor
(VIN – VRt)
t = –C2 c R2 c 1n
............. 4
VIN – VCt
Figure 2
(
): MFP14S
Unit (resistance: Ω, capacitance: F)
Output Timing Chart
Hall input
Discharge pulse
Ct voltage
Output ‘off’ signal
OUT1 current
OUT2 current
All-phase ON waveform
Control output waveform
Figure 3
No. 5
LB1860, LB1860M, LB1861, LB1861M
Package Dimensions
unit : mm
[LB1860, LB1861]
PDIP10 / DIP10S (300 mil)
CASE 646AK
ISSUE O
www.onsemi.com
6
LB1860, LB1860M, LB1861, LB1861M
Package Dimensions
unit : mm
[LB1860M, LB1861M]
SOIC14 W / MFP14S (225 mil)
CASE 751CB
ISSUE A
SOLDERING FOOTPRINT*
(Unit: mm)
GENERIC
MARKING DIAGRAM*
XXXXXXXXXX
YMDDD
XXXXX = Specific Device Code
Y = Year
M = Month
1.00
0.47
DDD = Additional Traceability Data
NOTE: The measurements are not to guarantee but for reference only.
*This information is generic. Please refer to
device data sheet for actual part marking.
*For additional information on our Pb-Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
www.onsemi.com
7
LB1860, LB1860M, LB1861, LB1861M
ORDERING INFORMATION
Device
Package
Shipping (Qty / Packing)
PDIP10 / DIP10S (300 mil)
(Pb-Free)
LB1860-E
50 / Fan-Fold
1000 / Tape & Reel
1000 / Tape & Reel
50 / Fan-Fold
SOIC14 W / MFP14S (225 mil)
(Pb-Free)
LB1860M-TLM-E
LB1860M-TLM-H
LB1861-E
SOIC14 W / MFP14S (225 mil)
(Pb-Free / Halogen Free)
PDIP10 / DIP10S (300 mil)
(Pb-Free)
SOIC14 W / MFP14S (225 mil)
(Pb-Free)
LB1861M-MPB-E
LB1861M-MPB-H
LB1861M-TLM-E
LB1861M-TLM-H
60 / Fan-Fold
SOIC14 W / MFP14S (225 mil)
(Pb-Free / Halogen Free)
60 / Fan-Fold
SOIC14 W / MFP14S (225 mil)
(Pb-Free)
1000 / Tape & Reel
1000 / Tape & Reel
SOIC14 W / MFP14S (225 mil)
(Pb-Free / Halogen Free)
† For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel
Packaging Specifications Brochure, BRD8011/D. http://www.onsemi.com/pub_link/Collateral/BRD8011-D.PDF
ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiariesin the United States
and/or other countries. SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of
SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without
further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitabilityof its products for any particular purpose,
nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including
without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can
and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each
customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are
not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applicationsintended to support or
sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers,
employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of,
directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was
negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all
applicable copyright laws and is not for resale in any manner.
www.onsemi.com
8
相关型号：
LB1861M-MPB-E
Two-Phase Half-Wave Variable Speed Fan Motor Driver, SOIC14 W / MFP14S (225 mil), 60-FNFLD
ONSEMI
©2020 ICPDF网 联系我们和版权申明