Ordering number : ENN7107
80102RM (OT) No. 7107-1/17
Overview
The LB11824M is a direct PWM drive predriver IC for
use with three-phase power brushless motors. The
LB11824M can implement a motor drive circuit with the
desired output capacity (voltage and current) by using
appropriate external transistors. This device is optimal for
motor drive in larger home appliances such as air
conditioners and on-demand hot water heaters.
Functions and Features
Three-phase bipolar drive
Direct PWM drive
Built-in forward/reverse switching circuit
Full complement of built-in protection circuits,
including current limiter, undervoltage protection
circuit, motor lockup protection circuit, and thermal
protection circuit.
Can be controlled by either a command voltage or the
duty of an input PWM signal.
Provides three types of Hall-effect element signal pulse
outputs.
Package Dimensions
unit: mm
3073C-MFP30SD
1
15
30
16
1.0
15.2
0.4
0.65
10.5
7.9
0.25
(0.6)
2.45max
0.1
(2.25)
SANYO: MFP30SD
[LB11824M]
LB11824M
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Direct PWM Drive Brushless Motor Predriver for On-Demand Water Heater
and Air Conditioner Motors
Monolithic Digital IC
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage 1
V
CC
1 max
V
CC
1 pin
14.5
V
Supply voltage 2
V
CC
2 max
V
CC
2 pin
14.5
V
Supply voltage 3
V
CC
3 max
V
CC
3 pin
20
V
Output current
I
O
max
Pins UL, VL, WL, UH, VH, WH
40
mA
RF pin applied voltage
VRF max
4
V
LVS pin applied voltage
VLVS max
20
V
TOC pin applied voltage
VTOC max
V
CC
2
V
VCTL pin applied voltage
VCTL max
14.5
V
Specifications
Absolute Maximum Ratings
at Ta = 25C
Continued on next page.
No. 7107-2/17
LB11824M
Continued from preceding page.
Parameter
Symbol
Conditions
Ratings
Unit
Allowable power dissipation
Pd max
Independent IC
0.9
W
Operating temperature
Topr
20 to +100
C
Storage temperature
Tstg
55 to +150
C
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Supply current 1
I
CC
1-1
15
20
mA
Supply current 2
I
CC
1-2
Stop mode
2.5
4
mA
Output block
Output voltage 1-1
V
OUT
1-1
Low level I
O
= 400 A
0.1
0.3
V
Output voltage 1-2
V
OUT
1-2
Low level I
O
= 10 mA
0.8
1.1
V
Output voltage 2
V
OUT
2
High level I
O
= 20 mA
V
CC
1 1.1
V
CC
1 0.9
V
Temperature coefficient 1-1
V
OUT
1-1 Design target value
*
, Low level I
O
= 400 A
0.2
mV/C
Temperature coefficient 1-2
V
OUT
1-2 Design target value
*
, Low level I
O
= 10 mA
1.5
mV/C
Temperature coefficient 2
V
OUT
2
Design target value
*
, High level I
O
= 20 mA
1.5
mV/C
12 V Regulator-voltage output (12REG pin)
Output voltage
V12REG
V
CC
3 = 15 V, I
O
= 30 mA
11.7
12.1
12.6
V
Voltage regulation
12VREG1 V
CC
3 = 13.5 to 19 V, I
O
= 30 mA
150
300
mV
Load regulation
12VREG2 I
O
= 5 to 45 mA, V
CC
3 = 15 V
100
200
mV
Temperature coefficient
12VREG3 Design target value
*
2
mV/C
5 V Regulator-voltage output (VREG pin)
Output voltage
VREG
4.7
5.0
5.3
V
Voltage regulation
VREG1
V
CC
1 = 8 to 13.5 V
40
100
mV
Load regulation
VREG2
IO = 5 to 20 mA
5
30
mV
Temperature coefficient
VREG3
Design target value
*
0
mV/C
Electrical Characteristics
at Ta = 25C, V
CC
1 = 12 V, V
CC
2 = VREG
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage range 1-1
V
CC
1-1
V
CC
1 pin
8 to 13.5
V
Supply voltage range 1-2
V
CC
1-2
V
CC
1 pin, with V
CC
1-VREG short-circuited
4.5 to 5.5
V
Supply voltage range 2
V
CC
2
V
CC
2 pin
4.5 to V
CC
1
V
Supply voltage range 3
V
CC
3
V
CC
3 pin
13.5 to 19
V
Output curent
I
O
Pins UL, VL, WL, UH, VH, WH
30
mA
12V constant-voltage output current
I12REG
50
mA
5V constant-voltage output current
IREG
20
mA
HP pin applied voltage
VHP
0 to 13.5
V
HP pin output current
IHP
0 to 10
mA
Allowable Operating Range
at Ta = 25C
Continued on next page.
Note
*
: These items are design target values and are not tested.
No. 7107-3/17
LB11824M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Hall Amplifier Block
Input bias current
IHB (HA)
2
0.5
A
Common-mode input voltage range 1
VICM1
Hall device used
0.5
V
CC
1 2.0
V
Common-mode input voltage range 2
VICM2
For input one-side bias (Hall IC application)
0
V
CC
1
V
Hall input sensitivity
50
mVp-p
Hysteresis width
V
IN
(HA)
20
30
50
mV
Input voltage L
H
VSLH (HA)
5
15
25
mV
Input voltage H
L
VSHL (HA)
25
15
5
mV
VCTL pin
Input voltage 1
VCTL1
Output duty 0%
1.05
1.4
1.75
V
Input voltage 2
VCTL2
Output duty 100%
3.0
3.5
4.1
V
Input bias current 1
IB1 (CTL) VCTL = 0 V
80
60
A
Input bias current 2
IB2 (CTL) VCTL = 5 V
60
80
A
PWM oscillator (PWM pin)
Output H level voltage
V
OH
(PWM)
2.75
3.0
3.25
V
Output L level voltage
V
OL
(PWM)
1.0
1.2
1.3
V
External C charge current
ICHG
VPWM = 2.1 V
60
45
30
A
Oscillator frequency
f (PWM)
C = 1000pF
17.6
22
26.8
kHz
Amplitude
V (PWM)
1.6
1.8
2.1
Vp-p
TOC pin
Input voltage 1
VTOC1
Output duty 0%
2.72
3.0
3.30
V
Input voltage 2
VTOC2
Output duty 100%
0.99
1.2
1.34
V
Input voltage 1L
VTOC1L
Design target value
*
, 0% with V
CC
2 = 4.7 V
2.72
2.80
2.90
V
Input voltage 2L
VTOC2L
Design target value
*
, 100% with V
CC
2 = 4.7 V
0.99
1.08
1.17
V
Input voltage 1H
VTOC1H
Design target value
*
, 0% with V
CC
2 = 5.3 V
3.08
3.20
3.30
V
Input voltage 2H
VTOC2H
Design target value
*
, 100% with V
CC
2 = 5.3 V
1.11
1.22
1.34
V
HP pin
Output saturation voltage
VHPL
I
O
= 7 mA
0.15
0.5
V
Output leakage current
IHP leak
V
O
= 13.5 V
10
A
CSD oscillator (CSD pin)
Output H level voltage
V
OH
(CSD)
3.2
3.6
4.0
V
Output L level voltage
V
OL
(CSD)
0.9
1.1
1.3
V
External C charge current
ICHG1
14
10
6
A
External C discharge current
ICHG2
7
11
15
A
Oscillator frequency
f (CSD)
C = 0.01 F
200
Hz
Amplitude
V (CSD)
2.2
2.5
2.75
Vp-p
Current limiter circuit (RF pin)
Limiter voltage
VRF
0.45
0.5
0.55
V
Continued from preceding page.
Continued on next page.
Note
*
: These items are design target values and are not tested.
No. 7107-4/17
LB11824M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Low-voltage protection circuit (LVS pin)
Operating voltage
VSDL
3.6
3.8
4.0
V
Release voltage
VSDH
4.1
4.3
4.5
V
Hysteresis width
VSD
0.35
0.5
0.65
V
Thermal shutdown operation (Overheat protection circuit)
Thermal shutdown operating temperature
TSD
Design target value
*
(junction temperature)
125
145
165
C
Hysteresis width
TSD
Design target value
*
(junction temperature)
20
25
30
C
PWMIN pin
Input frequency
f (PI)
50
kHz
H level input voltage
V
IH
(PI)
2.0
VREG
V
L level input voltage
V
IL
(PI)
0
1.0
V
Input open voltage
VIO (PI)
VREG 0.5
VREG
V
Hysteresis width
VIS (PI)
0.2
0.3
0.4
V
H level input current
I
IH
(PI)
VPWMIN = VREG
10
0
10
A
L level input current
I
IL
(PI)
VPWMIN = 0 V
130
96
A
S/S pin
H level input voltage
V
IH
(SS)
2.0
VREG
V
L level input voltage
V
IL
(SS)
0
1.0
V
Input open voltage
VIO (SS)
VREG 0.5
VREG
V
Hysteresis width
V
IS
(SS)
0.2
0.3
0.4
V
H level input current
I
IH
(SS)
VS/S = VREG
10
0
10
A
L level input current
I
IL
(SS)
VS/S = 0 V
130
96
A
F/R pin
H level input voltage
V
IH
(FR)
2.0
VREG
V
L level input voltage
V
IL
(FR)
0
1.0
V
Input open voltage
VIO (FR)
VREG 0.5
VREG
V
Hysteresis width
VIS (FR)
0.2
0.3
0.4
V
H level input current
I
IH
(FR)
VF/R = VREG
10
0
10
A
L level input current
I
IL
(FR)
VF/R = 0 V
130
96
A
N1 pin
H level input voltage
V
IH
(N1)
2.0
VREG
V
L level input voltage
V
IL
(N1)
0
1.0
V
Input open voltage
V
IO
(N1)
VREG 0.5
VREG
V
Hysteresis width
V
IS
(N1)
0.2
0.3
0.4
V
H level input current
I
IH
(N1)
VN1 = VREG
10
0
10
A
L level input current
I
IL
(N1)
VN1 = 0 V
130
96
A
N2 pin
H level input voltage
V
IH
(N2)
2.0
VREG
V
L level input voltage
V
IL
(N2)
0
1.0
V
Input open voltage
V
IO
(N2)
VREG 0.5
VREG
V
H level input current
I
IH
(N2)
VN2 = VREG
10
0
10
A
L level input current
I
IL
(N2)
VN2 = 0 V
130
96
A
Continued from preceding page.
Note
*
: These items are design target values and are not tested.
No. 7107-5/17
LB11824M
1.0
0.4
0.8
0.6
0.2
120
100
80
60
40
20
0
20
Pd max - Ta
0.36W
Ambient temperature, Ta -
C
Power dissipation, Pd max - W
0.9W
Independent IC
Three-Phase logic Truth Table
(IN = [H] indicates a condition in which IN+ > IN.)
When S/S and PWMIN pins are not used, set the input to the L level voltage.
For HP output, pulsed output of Hall input IN1 (1-Hall output), 1/2 division output of 1 Hall, or synthetic output of three
phases of Hall input (three-Hall synthetic output) may be selected.
F/R = L
F/R = H
Output
IN1
IN2
IN3
IN1
IN2
IN3
PWM
--
1
H
L
H
L
H
L
VH
UL
2
H
L
L
L
H
H
WH
UL
3
H
H
L
L
L
H
WH
VL
4
L
H
L
H
L
H
UH
VL
5
L
H
H
H
L
L
UH
WL
6
L
L
H
H
H
L
VH
WL
S/S pin
Input condition
Condition
H or open
Stop
L
Start
PWMIN pin
Input condition
Condition
H or open
Output OFF
L
Output ON
N1,N2 pin
Input condition
HP output
Pin N1
Pin N2
L
L
1/2 division
L
H or open
1 Hall
H or open
L
H or open
H or open
Synthesis of three Halls
No. 7107-6/17
LB11824M
Pin Assignment
GND
N2
HP
F/R
PWMIN
LB11824M
S/S
RF
WH
WL
VH
UH
CSD
VCTL
PWM
UL
V
CC
1
IN1+
IN1
VL
N1
9
8
7
6
5
4
3
2
1
10
11
12
13
14
15
27
26
28
24
23
25
21
29
22
30
19
18
20
16
17
IN2+
IN2
IN3+
IN3
VREG
TOC
12REG V
CC
3
LVS
V
CC
2
Pin Description
Pin No.
Symbol
Pin Description
Equivalent circuit
Output current detection
Connect a resistor(Rf) between this pin and ground.
Set with the maximum output current IOUT = 0.5/Rf.
1
RF
VREG
5k
1
Output pin (external TR drive output)
Duty control made on UH, VH, and WH sides.
2
4
6
3
5
7
WH
VH
UH
WL
VL
UL
V
CC
1
2
4
6
3
5
7
Power supply (output and Hall input blocks). Normally used
with the 12 V power supply. Connect to VCC2 and VREG
for application with the 5 V single power supply. Connect a
capacitor between this pin and GND for stabilization.
8
V
CC
1
Hall amplifier input.
IN+ > IN is the input high state,
and the reverse is the input low state.
Connect a capacitor between the IN+ and IN inputs if there
is noise in the Hall sensor signals.
9
10
11
12
13
14
IN1+
IN1
IN2+
IN2
IN3+
IN3
V
CC
1
10 12 14
9 11 13
300
300
Continued on next page.
No. 7107-7/17
LB11824M
Pin No.
Symbol
Pin Description
Equivalent circuit
V
CC
1
15
Regulated-voltage output pin (5V output)
Connect a capacitor (about 0.1F) between this pin and
ground for stabilization.
15
VREG
Power pin (PWM oscillation, PWM comparator, VCTL amp).
Normally connect to VREG.
16
V
CC
2
V
CC
1
43k
17
18k
Voltage detection pin for low-voltage protection. To detect
the supply voltage of 5 V or more, connect the zenor diode
in series to set the detection voltage.
17
LVS
19
18
Power pin (V
CC
3) for use during application with the supply
voltage of 12 V or more.
12 V is generated at the 12 REG pin. To use the 12REG
pin, connect this pin to V
CC
1. When not used, keep both
V
CC
3 and 12 REG open or connect them to GND.
18
19
V
CC
3
12REG
V
CC
2
20k
20
PWM waveform comparator pin. Normally used in the open
condition. By inputting the voltage directly into this pin, the
output duty can be controlled without using the VCTL amp.
20
TOC
Continued on next page.
Continued from preceding page.
No. 7107-8/17
LB11824M
Continued from preceding page.
Pin No.
Symbol
Pin Description
Equivalent circuit
Pin to set the PWM oscillation frequency.
Connect a capacitor between this pin and GND.
21
PWM
V
CC
2
2k
200
21
Control voltage input pin. For control with this pin, set the
PWMIN pin to the L level.
22
VCTL
V
CC
2
40k
22
34k
2.26V
Pin to set the operation time of motor lock protection circuit
and to set the initial reset pulse.
Connect a capacitor between this pin and GND. When the
protection circuit is not to be used, connect a capacitor and
resistor (150kW, 4700pF) in parallel between this pin and
GND.
23
CSD
VREG
300
23
Start/stop control pin. Start with L and stop with H or in the
open condition
24
S/S
VREG
50k
3.5k
24
PWM pulse input pin. Output drive with L and output OFF
with H or in the open condition. For control with this pin,
apply the voltage of VCTL2 voltage or more to the VCTL
pin.
25
PWM
IN
VREG
50k
3.5k
25
Continued on next page.
No. 7107-9/17
LB11824M
Continued from preceding page.
Pin No.
Symbol
Pin Description
Equivalent circuit
Forward/reverse input pin
26
F/R
VREG
50k
3.5k
26
Hall signal output signal
27
HP
VREG
27
Pin to select Hall signal output (HP output)
28
N1
VREG
50k
3.5k
28
Pin to select Hall signal output (HP output)
29
N2
VREG
50k
3.5k
29
GND pin
30
GND
Hall-Effect Sensor Input/Output Timing Chart
No. 7107-10/17
LB11824M
F/R = L
F/R = H
IN1
IN2
IN3
UH
VH
WH
UL
VL
WL
IN1
IN2
IN3
UH
VH
WH
UL
VL
WL
PWM output
Sample Application Circuit
(1) Bipolar transistor drive (upper side PWM) using a 5 V power supply
No. 7107-11/17
LB11824M
HALL LOGIC
HALL
HYS
AMP
PWM
OSC
SD
OSC
F/R
S/S
LOGIC
HP
LOGIC
COMP
TSD
LVSD
CURR
RF
PWM
VCC1
HP
F/R
PRI
DRIVER
W
L
UH
UL
VH
VL
W
H
GND
12VREG
VCTL
VCC2
VCC1
12VREG
VREG
N1
N2
CSD
PWMIN
VREF
VCC3
VREG
N2
N1
PWM
IN
S/S
LVS
TOC
5V
VM
VREG
+
IN3
IN2
IN1
IN2+
IN1+
IN3+
LIM
H
H
H
(2) MOS transistor drive (lower side PWM) using a 12 V power supply
No. 7107-12/17
LB11824M
HALL LOGIC
HALL
HYS
AMP
PWM
OSC
SD
OSC
F/R
S/S
LOGIC
COMP
TSD
LVSD
CURR
RF
PWM
VCC1
F/R
HP
PRI
DRIVER
W
H
UL
UH
VL
VH
W
L
GND
12VREG
VCTL
VREG
VCC2
VCC1
12VREG
VREG
N1
N2
CSD
PWMIN
Pulse input
VREF
VCC3
VREG
N2
N1
PWM
IN
S/S
LVS
TOC
VM
VREG
+
IN3
IN2
IN1
IN2+
IN1+
IN3+
HP
LOGIC
LIM
12V
H
H
H
No. 7107-13/17
LB11824M
(3) NMOS transistor plus pnp transistor drive (lower side PWM) using a 15 V power supply
HALL LOGIC
HALL
HYS
AMP
PWM
OSC
SD
OSC
F/R
S/S
LOGIC
COMP
TSD
LVSD
CURR
RF
PWM
VCC1
F/R
HP
PRI
DRIVER
W
H
UL
UH
VL
VH
W
L
GND
12VREG
VCTL
VCC2
VCC1
12VREG
VREG
N1
N2
CSD
PWMIN
VREF
VCC3
VREG
N2
N1
PWM
IN
S/S
LVS
TOC
VM
VREG
+
IN3
IN2
IN1
IN2+
IN1+
IN3+
HP
LOGIC
LIM
15V
LB11824M Function Description
1. Output drive circuit
This IC employs a direct PWM drive method to minimize the power loss at output. The output TR is normally
saturated in the ON condition, adjusting the motor drive power by changing the output on-duty. Output PWM
switching is made on UH, VH, and WH output sides. Since UL - WL and UH- WH outputs are of the same output
form, either lower PWM or upper PWM can be selected by changing the external output Tr connection method.
Selection of diode to be connected to the non-PWM side output requires attention because there is a problem of reverse
recovery time. (Unless a diode with the short reverse recovery time is selected, the through current flows in an instant
when the PWM side Tr is turned ON.)
UL - WL and UH - WH outputs enter the high impedance condition at a time of stop or when the supply voltage is
extremely low (below the allowable operation voltage). Accordingly, an appropriate measure (pull-down resistor, etc.)
is necessary in the external circuit to prevent an incorrect action due to the leak current.
2. Current limiting circuit
The current limiting circuit performs limiting with the current determined from I = V
RF
/Rf (V
RF
= 0.5Vtyp, Rf: current
detector resistance) (that is, this circuit limits the peak current).
Limiting operation includes decrease in the output on-duty to suppress the current.
The current limiting circuit incorporates a filter circuit to prevent
an incorrect action of current limiting operation due to detection
of the reverse recovery current of output diode during PWM
operation. This internal filter circuit will be enough to prevent
trouble for normal application. In case of an incorrect action
(diode reverse recovery current flowing for 1s or more), add an
external filter circuit (R, C low pass filter, etc.).
3. Power save circuit
This IC enters the power save condition to decrease the current dissipation
in the stop mode. In this condition, the bias current of most of circuits is cut
off. Even in the power save condition, the 5 V regulator output (VREG) is
given. If the bias current of Hall device is to be cut, 5V and Hall device
may be connected via PNP Tr as a means to meet such needs.
4. Compatibility with various power supplies
To operate this IC with external 5V power supply (4.5 - 5.5 V), short-circuit V
CC
1 and V
REG
pin for connection to
power supply.
To operate this IC with external 12 V power supply (8 - 13.5 V), connect power supply to V
CC
1 (5V is generated at the
VREG pin to function as a power supply to the control circuit).
To operate this IC with external 15 V power supply (13.5 - 19 V), connect power supply to V
CC
3 and short-circuit
12REG and V
CC
1 pins (12 V is generated at the 12REG pin to function as a power supply to V
CC
1).
Connect the V
CC
2 pin basically to the V
REG
pin. In an application in which the motor rotation speed is to be
determined by the external fixed voltage (resistor division, etc.), set V
CC
2 to 12 V (by connecting to V
CC
1) to suppress
variation of the output duty. (Variation of IC is difficult to affect adversely because of increase in the PWM oscillation
amplitude and in the comparator dynamic range.)
5. PWM frequency
PWM frequency is determined from the capacity C (F) of capacitor connected to the PWM pin.
fPWM
.
=.1/(45000
C)
Connection of a 1000 pF capacitor causes oscillation of about 22 kHz. Excessively low PWM frequency causes causes
a switching sound from the motor while excessively high PWM frequency causes increase in the power loss at the
output. About 15 - 50 kHz is recommended. Capacitor GND should be arranged near the IC GND pin as much as
possible to protect from the effect of output noise.
No. 7107-14/17
LB11824M
Current detection resistance
To pin RF
To pin VREG
To pin S/S
Hall device
6. Drive method
The output duty can be controlled according to any of following methods.
Control with the V
CTL
pin voltage
For the control voltage, refer to the electric characteristics. For control with the VCTL pin, set the PWMIN pin voltage
to the L level.
Control with the voltage applied to the TOC pin
The TOC pin voltage and PWM oscillation waveform are compared to determine the output duty. The output duty
becomes 0 % when the TOC pin voltage exceeds V
OH
(PWM) (3.0 Vtyp) and 100% when it becomes lower than the
V
OL
(PWM) (1.2 Vtyp). For control with the TOC pin, set the PWMIN pin voltage to the L level.
For control with the input level other than the internal CTL amp control input level, external connection of amp allows
setting to the arbitrary input level (with the external amp output connected to the TOC pin). For control from the TOC
pin, fix the V
CTL
pin voltage.
For an application in which the regulated voltage is applied to the TOC pin through resistor division, etc., it is
necessary to take into account the effect of resistor (about 20 k
) incorporated between the TOC pin and CTL amp
output. (Variation about 20%, temperature characteristics about +0.3%/C). If the noise is included in the voltage to
be applied to the TOC pin, chattering may occur in the output. In this case, stabilization with a capacitor is necessary.
Pulse control with the PWMIN pin
The output can be controlled on the basis of duty obtained by entering the
pulse in the PWMIN pin. The output can be turned ON when the L-level
input voltage is applied to the PWM pin and OFF when the H-level input
voltage is applied. With the PWMIN pin open, the output becomes the H
level and is turned OFF. If input with reversed logic is necessary, addition
of external Tr (NPN) may be enough.
For control with the PWMIN pin, set the V
CTL
pin voltage that is more than
the V
CTL
2 voltage (output duty set to 100%) or connect the TOC pin to
GND.
7. Hall input signal
The Hall input requires the signal input with an amplitude exceeding the hysteresis width (50 mV max). Considering
the effect of noise and phase displacement, the input with the amplitude of 120 mV or more is recommended.
When the noise causes disturbance in the output waveform (at a time of phase change) or HP output (Hall signal three-
phase synthesis output), insert a capacitor to the input to prevent such trouble. The Hall input is used as a signal to
determine the input to the restriction protection circuit and the protection circuit during reverse. Though noise is
ignored to a certain degree, due attention must be paid when using these protection circuits.
When all three phases of Hall input signal are entered, the output is turned OFF entirely (all of UL, VL, WL, UH, VH,
and WH OFF).
To enter the Hall IC output, fix one side of input (+ or ) to the voltage within the common-mode input range for Hall
device. This will allow input from 0 to V
CC
1 for another single-side input.
8. Circuit for low-voltage protection
This circuit detects the voltage applied to the LVS pin. When this voltage drops below the operation voltage (see the
electric characteristics), the one-side output (UH, VH, and WH) is turned OFF. To prevent repetition of output
ON/OFF near the protection activation voltage, the hysteresis is provided. Accordingly, the output is not recovered
unless the voltage rises by about 0.5 V above the activation voltage.
The protection activation voltage is for the 5V system detection level. The detection level can be raised by connecting
the zenor diode in series to the LVS pin and by shifting the detection
level. The LVS pin inrush current at a time of detection is about 65A.
To stabilize rise of the zenor diode voltage, increase the diode current by
inserting the resistor between the LVS pin and GND.
When the protection circuit is not used, apply a voltage on a level where
the protection is not activated, instead of setting the LVS pin open
(output OFF with the pin open).
No. 7107-15/17
LB11824M
Pin PWMIN
Pulse input
To detection power supply
To pin LVS
9. Motor lock protection circuit
A motor lock protection circuit is incorporated for protection of IC and motor when the motor is locked. When the
Hall input signal is not changed for a certain period with the motor driving, the one-side output (UH, VH, WH) is
turned OFF. The time is set by means of a capacity of a capacitor connected to the CSD pin.
Set time (s)
.
=. 154
C (F)
Addition of a 0.01 F capacitor causes a protection time of about 1.54 seconds. (Drive is turned OFF when one cycle
of Hall input signal is longer than this time period.) The time to be set must have a sufficient allowance so that the
protection is not activated at a normal motor startup. Select the capacitor of 4700 pF or more. The protection circuit is
not activated when braking. To cancel the restriction protection condition, one of following steps must be taken:
Stop mode (10 s or more)
Maintaining the output duty 0% condition through input of VCTL or PWMIN for more than the period of tCSD
2.
(tCSD (s)
.
=. 0.5
C (F). When the 0.01 F capacitor is added, maintaining for about 10 ms or more is necessary.)
Re-application of power supply
The CSD pin acts also as an initial reset pulse generation pin and causes reset of the logic circuit when connected with
GND. Accordingly, the motor drive condition can not be obtained. When this pin is not to be used, a resistor of about
150 k
and a capacitor of about 4700 pF must be connected to GND in parallel. When the restriction protection circuit
is not used, following functions are also invalid:
Protection circuit for the reverse mode
Overheat protection circuit
10. Overheat protection circuit
One-side output (UH, VH,WH) is turned OFF when the junction temperature (Tj) exceeds a specified temperature
(TSD). Since the minimum variation of TSD is 125C, thermal design must be made so that Tj = 125C is not
exceeded except in the case of abnormality. Accordingly, Pdmax when Tj (max) = 125C is 0.72 W (Ta=25C)
When the motor lock protection is not to be used by inserting in parallel the resistor of about 150k
and capacitor of
about 4700pF between the CSD pin and GND, this overheat protection circuit does not function.
In this case, Tj (max) = 150C, so that Pdmax = 0.9W (Ta = 25C)
11. Forward/reverse rotation
To select forward or reverse in the rotation condition, a measure is taken to prevent flow of the through current
(through current due to the output Tr OFF delay time at selection) at the output. Selection during rotation causes the
current exceeding the current limit value to flow through the output Tr because of the motor coil resistance and motor
reverse electromotive voltage condition. It is therefore necessary to select the external output Tr that is not damaged by
this current or to select forward/reverse only when the motor rotation speed has decreased to a certain level.
12. Power supply stabilization
This IC is of a switching drive type and the power line tends to be affected. It is therefore necessary to connect a
capacitor of sufficient capacity for stabilization between the V
CC
1 pin and GND.
To insert a diode in the power line to prevent breakdown through reverse connection of power supply, the power line
becomes more readily affected. It is necessary to select a larger capacity.
To turn ON/OFF the power supply with a switch, etc., large distance between the switch and capacitor causes
substantial deviation of the supply voltage due to the line inductance and inrush current into the capacitor. In certain
cases, the withstand voltage may be exceeded. In this case, do not use a ceramic capacitor whose series impedance is
low. Instead, use an electrolytic capacitor to suppress the inrush current and to prevent voltage rise.
13. VREG stabilization
To stabilize the V
REG
voltage that is the power supply for the control circuit, connect a 0.1F or more capacitor
between V
REG
and GND. The capacitor GND must be wired near the GND pin of IC as much as possible.
No. 7107-16/17
LB11824M
PS No. 7107-17/17
LB11824M
This catalog provides information as of August, 2002. Specifications and information herein are subject to
change without notice.
Specifications of any and all SANYO 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.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products must
not be exported without obtaining the export license from the authorities concerned in accordance with the
above law.
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mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
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