The LB11685AV is a three-phase full-wave current-linear-drive motor driver IC. It adopts a sensor less control system
without the use of a Hall Effect device. For quieter operation, the LB11685AV features a current soft switching circuit and
be optimal for driving the cooling fan motors used in refrigerators, etc.
Functions
•
Three-phase full-wave linear drive (Hall sensor-less method )
•
Built-in three-phase output voltage control circuit
•
Built-in current limiter circuit
•
Built-in motor lock protection circuit
•
Motor lock protection detection output
•
FG output made by back EMF
•
Built-in thermal shut down circuit
•
Beat lock prevention circuit
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Input applied voltage
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Junction temperature
Symbol
VCC max
VIN max
IO max *1
Pd max
Topr
Tstg
Tj max
Mounted on a board *2
Conditions
Ratings
19
-0.3 to VCC +0.3
1.2
1.05
-40 to 85
-55 to 150
150
Unit
V
V
A
W
°C
°C
°C
*1: The IO is a peak value of motor-current.
*2: Specified board: 76.1mm
×
114.3mm
×
1.6mm, glass epoxy board.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer
'
s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer
'
s products or
equipment.
61610 SY 20100604-S00001 No.A1772-1/7
LB11685AV
Recommended Operating Conditions
at Ta = 25°C
Parameter
Recommended Supply voltage
Operating supply voltage
Symbol
VCC
VCC op
Conditions
Ratings
12.0
4.5 or 18.0
Unit
V
V
Electrical Characteristics
at Ta
=
25°C, VCC = 5.0V
Parameter
Supply current
Internal regulate voltage
Output voltage (source)
Output voltage (sink)
Current limiter
MCOM pin
common-input voltage range
MCOM pin
Source current for hysteresis
MCOM pin
Sink current for hysteresis
MCOM pin
hysteresis current ratio
VCO input bias current
VCO oscillation minimum
frequency
VCO oscillation maximum
frequency
CX charge / discharge current
CX hysteresis voltage
C1 (C2) charge current
C1 (C2) discharge current
C1 (C2) charge / discharge
current ratio
C1/C2 charge current ratio
C1/C2 discharge current ratio
C1 (C2) cramp voltage width
FG output low level voltage
RD output low level voltage
Thermal shut down operating
temperature *1
Thermal shut down hysteresis
temperature *1
ΔTTSD
RTCCHG
RTCDIS
VCW1(2)
VFGL
VRDL
TTSD
IFG = 3mA
IRD = 3mA
Junction temperature
Design target *2
Junction temperature
Design target *2
15
°C
150
180
RTCCHG = IC1+ / IC2+
RTCDIS = IC1- / IC2-
0.8
0.8
1.0
1.0
1.0
1.3
1.2
1.2
1.6
0.5
0.5
V
V
v
°C
ICX
ΔVCX
IC1(2)+
IC1(2)-
RTC1(2)
VCO = 2.5V, C1(2) = 1.3V
VCO = 2.5V, C1(2) = 1.3V
RTC1(2) = IC1(2)+ / IC1(2)-
fVCOmax
IVCO
fVCOmin
VCO = 2.3V
VCO = 2.1V, CX = 0.015μF
Design target *2
VCO = 2.7V, CX = 0.015μF
Design target *2
VCO = 2.5V, CX = 1.6V
70
0.35
12
12
0.8
100
0.55
20
20
1.0
140
0.75
28
28
1.2
μA
μA
μA
930
8.6
0.2
μA
Hz
kHz
RTCOM
RTCOM = ICOM+ / ICOM-
0.6
1.4
ICOM-
MCOM = 7V
30
80
μA
ICOM+
MCOM = 7V
30
80
μA
Symbol
ICC
VREG
VOSOUR
VOSINK
VOLIM
VINCOM
IO = 0.8A *3
IO = 0.8A *3
0.268
0
FC1 = FC2 = 0V
Conditions
min
5
3.0
Ratings
typ
10
3.3
1.3
0.5
0.300
max
20
3.6
1.7
1.3
0.332
VCC - 2
mA
V
V
V
V
V
Unit
*1: The thermal shut down circuit is built-in for protection from damage of IC. But its operation is out of Topr. Design thermal calculation at normal operation.
*2: Design target value and no measurement is made.
*3: The IO is a peak value of motor-current.
No.A1772-2/7
LB11685AV
Package Dimensions
unit : mm (typ)
3315
1.5
Pd max
-
Ta
Specified circuit board :
114.3
×
76.1
×
1.6mm
3
glass epoxy board
1.05
24
13
Allowable power dissipation, Pd max -- W
9.75
1.0
5.6
7.6
0.5
1
0.8
(0.48)
0.3
12
0.15
0.55
0.5
(1.3)
1.5MAX
0
-40
-20
0
20
40
60
80
100
SANYO : SSOP24J(275mil)
Pin Assignment
0.1
Ambient temperature, Ta -- C
UOUT
(NC)
(NC)
PGND
MCOM
(NC)
SGND
FG
RD
(NC)
VCO
CX
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VOUT
WOUT
(NC)
(NC)
RF
VCC
REG
VOH
FC1
FC2
C2
C1
No.A1772-3/7
LB11685AV
Block Diagram
1
24
2
23
3
Pre Drive
Distributor
22
4
21
Output Switching
Control
5
Start Up
&
Mask Timing
6
Reference
Voltage
20
Bandgap
+
-
19
7
Power On Reset
TSD
Motor Lock
Detector
18
8
17
9
FG
10
Torque Ripple
Rejection &
Current Limit
16
15
PLL
11
Low Voltage
Control
14
VCO
12
Soft
Switching
13
No.A1772-4/7
LB11685AV
Pin Function
Pin No.
1
23
24
4
Pin name
UOUT
WOUT
VOUT
PGND
GND pin in the output part.
This pin is connected to GND. The SGND pin is also
connected to GND
20
RF
Pin to detect output current.
By connecting a resistor between this pin and VCC, the
output current is detected as a voltage.
The current limiter is operated by this voltage.
5
MCOM
Motor coil midpoint input pin.
The coil voltage waveform is detected based on this
voltage.
SGND SGND
VCC
Function
Each output pin of three phases.
Equivalent circuit
Pin No.20
Pin No.1,23,24
Pin No.4
SGND
VCC
Pin No.5
SGND
SGND
7
SGND
Ground pin (except the output part)
This pin is connected to GND.
The PGND pin is also connected to GND.
8
FG
FG out made by back EMF pin.
It synchronizes FG out with inverted V-phase.
When don’t use this function, open this pin.
Pin No.8
No.9
SGND
SGND
9
RD
Motor lock protection detection output pin.
Output with L during rotation of motor.
Open during lock protection of motor (High-impedance).
When don’t use this function, open this pin.
11
VCO
PLL output pin and VCO input pin.
To stabilize PLL output, connect a capacitor between this
pin and GND.
VREG
VCC
Pin No.11
SGND
VREG
VREG
SGND
12
CX
VCO oscillation output pin.
Operation frequency range and minimum frequency are
determined by the capacity of the capacitor connected to
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