Ordering number: ENA2095
LB11970RV
Monolithic Digital IC
For Fan Motor
Single-phase Full-wave Driver
Overview
http://onsemi.com
The LB11970RV is a motor driver of the single phase bipolar drive that a good direct PWM drive of the motor drive
efficiency can come true easily. It is most suitable for the power supply fan of the personal computer, CPU air
conditioner fan drive.
Functions
•
Single-phase full-wave drive (16V to 1.2A output transistor incorporated)
•
Variable speed function using thermistor input and external signal incorporated
→Enables
silent and low-vibration variable speed control through direct PWM control with separately-excited upper
Tr
•
Current limiter circuit (limit at IO=480mA with RL=1Ω connection, the limiter value determined with Rf)
•
Kick-back absorption circuit incorporated
•
Low-consumption, low-loss, and low-noise drive enabled by the soft switching circuit during phase shift
•
Regeneration Di incorporated with less external parts
•
HB incorporated
•
Lock protection and automatic reset functions incorporated
•
RD (Lock detection) output
•
Thermal shutdown circuit incorporated
Specifications
Absolute Maximum Ratings
at Ta = 25°C
Parameter
VCC maximum supply voltage
VM maximum supply voltage
OUT pin maximum output current
OUT pin output withstand voltage
HB maximum output current
VTH, RMI input pin withstand voltage
P-IN input pin withstand voltage
RD output pin output withstand voltage
RD output current
Allowable power dissipation
Operating temperature range
Storage temperature range
Symbol
VCC max
VM max
IOUT max
VOUT max
HB
VTH RMI max
VP-IN max
VRD max
IRD max
Pd max
Topr
Tstg
Specified substrate *
Conditions
Ratings
17
17
1.2
18
10
7
VCC
18
10
0.8
-30 to 90
-55 to 150
Unit
V
V
A
V
mA
V
V
V
mA
W
°C
°C
* Specified substrate: 30mm×30mm×0.8mm, paper phenol.
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
71812 SY 20060927-S00008 No.A2095-1/7
LB11970RV
Recommended Operating Ranges
at Ta = 25°C
Parameter
VCC supply voltage
VM supply voltage
VTH, RMI input level voltage range
P-IN input level voltage range
Triangular wave input range
Hall input common phase input voltage range
Symbol
VCC
VM
VTH, RMI
VP-IN
VRM
VICM
Conditions
Ratings
4.5 to 16
3.5 to 16
0 to 6
0 to VCC
0.5 to 4
0.2 to 3
Unit
V
V
V
V
V
V
Electrical Characteristics
at Ta = 25°C, VCC = 12V, Rf = 0Ω, unless otherwise specified.
Parameter
Circuit current
Symbol
ICC1
ICC2
HB voltage
6VREG voltage
CT pin H level voltage
CT pin L level voltage
CT pin charge current
CT pin discharge current
CT charge/discharge current ratio
OUT output L saturation voltage
OUT output H saturation voltage
Current limiter
RD output pin L voltage
RD output pin leak current
Overheat protection circuit
VHB
V6VREG
VCTH
VCTL
ICT1
ICT2
RCT
VOL
VOH
VRF
VRD
IRDL
THD
IRD=5mA
VRD=18V
* Design guarantee value
180
IO=200mA
IO=200mA, Rf=1Ω
During drive
During lock protection
IHB=5mA
I6VREG=5mA
Conditions
min
12
11
1.12
5.85
3.4
1.4
1.8
0.18
8
Ratings
typ
15
14
1.22
5.95
3.6
1.6
2.2
0.22
10
0.1
0.6
480
0.2
0.3
30
max
18
17
1.32
6.10
3.8
1.8
2.6
0.26
12
0.2
0.8
V
V
mV
V
μA
°C
mA
mA
V
V
V
V
μA
μA
unit
*: Design target value and no measurement were made.
No.A2095-2/7
Power technology
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