ENA2078 D

Ordering number : ENA2078
LB1960MC
Monolithic Digital IC
For Fan Motor
http://onsemi.com
2-phase Half-Wave Driver
Overview
The LB1960MC is a 2-phase half-wave driver for fan motor. The LB1960MC is a compact package. Low external parts
count, easy wiring, and small PCB area allow use also with miniature fan motors.
Functions
• Dual power supply voltage design (5/12V) and wide voltage handling range.
(3V also supported for rotation functions only)
• Constant-voltage Hall bias power supply (1.3V across HB to GND) assures stable Hall output over entire temperature
and power supply voltage range. External limiting resistor not required.
• Built-in Hall amplifier with hysteresis (supports core without commutating pole).
• Built-in lockup protection and automatic recovery circuits (External capacitor for rotation detection need only be
0.1μF, allowing compact, cost-saving design).
• Built-in output transistor with output withstand voltage 24V (max)/output current 500mA (average), 1A (peak).
• Built-in thermal protection circuit.
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC max
18
V
Maximum output current
IOUT ave
500
mA
1000
mA
IOUT peak
Maximum output voltage
t ≤ 1ms
VOUT max
Internal
V
Maximum HB output current
IH max
Allowable power dissipation
Pd max
Operating temperature
Topr
-30 to +85
°C
Storage temperature
Tstg
-55 to +150
°C
Mounted on a specified board *
10
mA
750
mW
* Specified board: 114.3mm × 76.1mm × 1.6mm, glass epoxy board.
Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.
Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current,
high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
May, 2013
70412 SY 20120417-S00001 No.A2078-1/4
LB1960MC
Allowable Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
VCC
3.6 to 17
V
Common mode input voltage range
VCOM
0.2 to HB
V
Electrical Characteristics at Ta = 25°C, VCC = 12V
Parameter
Symbol
Ratings
Conditions
min
Circuit current
ICC
CT capacitor charge current
ICT1
VCT = 0.2V
Capacitor discharge current
ICT2
VCT = 8V
Capacitor charge/discharge current
RCT
RCT = ICT1/ICT2
typ
In drive mode (CT = L)
Unit
max
2.3
In lockup protection mode (CT = H)
4
mA
3
5
mA
0.8
1.2
2.0
μA
0.16
0.24
0.4
μA
4.0
5.0
7.0
ratio
CT charge voltage
VCT1
6.8
7.2
7.6
V
CT discharge voltage
VCT2
1.4
1.6
1.8
V
22.5
23.5
24.5
V
1.0
1.3
V
6
12
mV
Output limiter withstand voltage
VOLM
IO = 1mA
Output saturation voltage
VOsat
IO = 50mA
Hall input sensitivity
VHN
Including offset and hysteresis
HB output H voltage
VHBH
RH = 350Ω
1.1
1.3
1.5
V
Thermal protection trigger
TSD
Assured design target *
180
180
210
°C
temperature
* Assured design target: Target value, not measured individually.
Package Dimensions
unit : mm (typ)
3424
4.9
8
0.2
Allowable power dissipation, Pd max -- mW
0.835
0.375
6.0
3.9
0.42
1.75 MAX
1.27
2
Specified board: 114.3×76.1×1.6mm3
glass epoxy board.
800
600
400
390
200
0
-30
0.175
1
Pd max -- Ta
1000
0
30
60
90
120
Ambient temperature, Ta -- °C
SANYO : SOIC8
No.A2078-2/4
LB1960MC
Pin Assignment
LB1960MC
IN+ 1
HB+ 2
IN− 3
8 VCC
7 CT
6 OUT2
5 GND
OUT1 4
Top view
Block Diagram
VCC
HB+
IN+
H
IN−
L1
Thermal protection
circuit
8
Constant
voltage
output
circuit
2
1
4
L2
OUT1
Control Block
3
6
OUT2
Constant
current
source
CT
7
C1
0.1 to 1μF
5
GND
Truth Table
IN-
IN+
H
L
L
H
-
-
CT
L
H
OUT1
OUT2
L
H
H
L
OFF
OFF
Mode
Rotating
Lock-up protection activated
No.A2078-3/4
LB1960MC
Application Circuit Example 5/12V power supply (3.8 to 18V)
VCC
HB+
RH
OUT1
H
IN+
IN−
OUT2
CT
0.1μF
GND
On-board parts
Precautions
• If CT pin is connected to GND, the lockup protection and restart functions are disabled.
• In a circuit configuration as shown above, a power supply/GND reverse connection will cause a current to flow as
follows: GND → OUT → coil → power supply. The value of this current is limited by the coil resistance. If it is less
than 500mA, the IC will not be destroyed. If required, insert a diode between VCC and the coil.
ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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 suitability of 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 applications intended 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.
PS No.A2078-4/4
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