Document
Ordering number : ENA1772A
LB11685AV
Monolithic Digital IC
3-phase sensor less Motor driver
http://onsemi.com
Overview
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 • Motor lock protection detection output • Built-in thermal shut down circuit
• Built-in current limiter circuit • Built-in motor lock protection circuit • FG output made by back EMF • Beat lock prevention circuit
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage Input applied voltage Maximum output current Allowable power dissipation
VCC max VIN max IO max *1 Pd max
Mounted on a board *2
19 -0.3 to VCC +0.3
1.2 1.05
V V A W
Operating temperature
Topr
-40 to 85
°C
Storage temperature
Tstg
-55 to 150
°C
Junction temperature
Tj max
150 °C
*1: The IO is a peak value of motor-current.
*2: Specified board: 76.1mm × 114.3mm × 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
71812 SY/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 to 18.0
Unit V V
Electrical Characteristics at Ta = 25°C, VCC = 5.0V
Parameter
Symbol
Conditions
Ratings Unit
min typ max
Supply current Internal regulate voltage
ICC VREG
FC1 = FC2 = 0V
5 10 20 mA 3.0 3.3 3.6 V
Output voltage (source) Output voltage (sink) Current limiter
VOSOUR VOSINK VOLIM
IO = 0.8A *3 IO = 0.8A *3
0.268
1.3 0.5 0.300
1.7 1.3 0.332
V V V
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
VINCOM
ICOM+
ICOM-
RTCOM
IVCO fVCOmin fVCOmax ICX ΔVCX
MCOM = 7V
MCOM = 7V
RTCOM = ICOM+ / ICOM-
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
0 30 30 0.6
70 0.35
VCC - 2 80
V μA
80 μA
1.4
0.2 μA 930 Hz
8.6 kHz
100 0.55
140 0.75
μA
C1 (C2) charge current C1 (C2) discharge current C1 (C2) charge / discharge current ratio C1/C2 charge current ratio
IC1(2)+ IC1(2)RTC1(2)
RTCCHG
VCO = 2.5V, C1(2) = 1.3V VCO = 2.5V, C1(2) = 1.3V RTC1(2) = IC1(2)+ / IC1(2)-
RTCCHG = IC1+ / IC2+
12 20 28 μA 12 20 28 μA 0.8 1.0 1.2
0.8 1.0 1.2
C1/C2 discharge current ratio
RTCDIS
RTCDIS = IC1- / IC2-
0.8 1.0 1.2
C1 (C2) cramp voltage width
VCW1(2)
1.0 1.3 1.6 V
FG output low level voltage
VFGL
IFG = 3mA
0.5 V
RD output low level voltage
VRDL
IRD = 3mA
0.5 v
Thermal shut down operating temperature *1 Thermal shut down hysteresis temperature *1
TTSD ΔTTSD
Junction temperature Design target *2 Junction temperature Design target *2
150 180 15
°C °C
*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
Package Dimensions
unit : mm (typ) 3315
9.75 24 13
LB11685AV
1.5 1.0
Pd max - Ta
Specified circuit board : 114.3 ×76.1× 1.6mm3 glass epoxy board
1.05
Allowable power dissipation, Pd max -- W
5.6 7.6 0.5
1 (0.48)
0.8
0.3
12
0.15
(1.3) 1.5MAX
0.1
SANYO : SSOP24J(275mil)
0.55 0.5
0 -40 -20 0 20 40 60 80 100
Ambient temperature, Ta -- C
Pin Assignment
UOUT 1 (NC) 2 (NC) 3 PGND 4 MCOM 5 (NC) 6 SGND 7
FG 8 RD 9 (NC) 10 VCO 11 CX 12
24 VOUT 23 WOUT 22 (NC) 21 (NC) 20 RF 19 VCC 18 REG 17 VOH 16 FC1 15 FC2 14 C2 13 C1
No.A1772-3/7
Block Diagram
LB11685AV
1
2
3
4
Output Switching Control
5
Start Up &
Mask Timing
6
7 Power On Reset
Motor Lock 8 Detector
9
FG
10
PLL
11
VCO
12
Pre Drive Distributor
Reference Voltage
Bandgap
+ -
TSD
Torque .