The LB11921T is a pre-driver IC designed for variable-speed control of 3-phase brushless motors. It can be used to
implement a motor drive circuit with the desired output capacity (voltage, current) by using discrete transistors for
the output stage. It implements direct PWM drive for minimal power loss. Since the LB11921T includes a built-in
VCO circuit, applications can control the motor speed arbitrarily by varying the external clock frequency.
Functions
•
Direct PWM drive output
•
Speed discriminator + PLL speed control circuit
•
Speed lock detection output
•
Built-in VCO circuit
•
Forward/reverse switching circuit
•
Braking circuit (short braking)
•
Full complement of on-chip protection circuits, including lock protection, current limiter, and thermal shutdown
protection circuits.
Specifications
Absolute Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Output current
Allowable power dissipation 1
Allowable power dissipation 2
Operating temperature
Storage temperature
Symbol
VCC max
IO max
Pd max1
Pd max2
Topr
Tstg
UH, VH, WH, UL, VL, WL output
Independent IC
Mounted on a circuit board*
Conditions
Ratings
8
10
0.4
0.9
-20 to +80
-55 to +150
Unit
V
mA
W
W
°C
°C
* Mounted on a specified board: 114.3mm×76.1mm×1.6mm, glass epoxy.
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
11707 MS IM 20060327-S00010 No.A0604-1/18
LB11921T
Allowable Operating Ranges
at Ta = 25°C
Parameter
FG Schmitt output applied voltage
FG Schmitt output current
Lock detection applied voltage
Lock detection output current
Supply voltage
Symbol
VFGS
IFGS
VLD
ILD
VCC
Conditions
Ratings
0 to 7
0 to 5
0 to 7
0 to 20
4.4 to 7.0
Unit
V
mA
V
mA
V
Electrical Characteristics
at Ta = 25°C, VCC = 5V
Parameter
Supply current 1
Supply current 2
Output Block
Output saturation voltage 1-1
Output saturation voltage 1-2
Output saturation voltage 2-1
Output saturation voltage 2-2
Hall Amplifier
Input bias current
Common-mode input voltage range 1
Common-mode input voltage range 2
Hall input sensitivity
Hysteresis
Input voltage low
→
high
Input voltage high
→
low
PWM Oscillator
Output high-level voltage
Output low-level voltage
Oscillator frequency
Amplitude
CSD Oscillator
Output high-level voltage
Output low-level voltage
External capacitor charge current
External capacitor discharge current
Oscillator frequency
Amplitude
VCO Oscillator C pin
Output high-level voltage
Output low-level voltage
Oscillator frequency
Amplitude
VOH(C)
VOL(C)
f(C)
V(C)
0.3
0.5
2.00
1.55
2.30
1.80
2.55
2.05
1.2
0.7
V
V
MHz
Vp-p
VOH(CSD)
VOL(CSD)
ICHG1
ICHG2
f(RK)
V(RK)
C = 0.047μF
2.1
3.15
0.9
-9.0
2.4
3.5
1.1
-6.5
4.0
20
2.4
2.65
3.85
1.3
-3.9
6.0
V
V
μA
μA
Hz
Vp-p
VOH(PWM)
VOL(PWM)
f(PWM)
V(PWM)
C = 680pF
1.1
2.75
1.45
3.0
1.65
23
1.35
1.6
3.25
1.9
V
V
kHz
Vp-p
ΔVIN(HA)
VSLH
VSHL
IHB(HA)
VICM1
VICM2
When Hall-effect sensors are used
When one-side biased inputs are used
(Hall-effect IC applications)
Sine wave
50
9
4
-13
15
7
-8
26
13
-4
mVp-p
mV
mV
mV
-2
0.5
0
-0.1
VCC-2.0
VCC
μA
V
V
VOsat1-1
VOsat1-2
VOsat2-1
VOsat2-2
At low level: IO = 500μA
At low level: IO = 5mA
At high level: IO = -500μA
At high level: IO = -5mA
VCC-0.2
VCC-0.4
0.1
0.3
VCC-0.1
VCC-0.2
0.2
0.5
V
V
V
V
Symbol
ICC1
ICC2
In stop mode
Conditions
min
Ratings
typ
23
2.1
max
32
2.9
mA
mA
unit
Continued on next page.
No.A0604-2/18
LB11921T
Continued from preceding page.
Parameter
Current Limiter Operation
Limiter
Thermal Shutdown Operation
Thermal shutdown operating
temperature
Hysteresis
Low-voltage Protection Circuit
Operating voltage
Release voltage
Hysteresis
FG Amplifier
Input offset voltage
Input bias current
Output high-level voltage
Output low-level voltage
FG input sensitivity
Schmitt amplitude for the next stage
Operating frequency range
Open-loop gain
Reference voltage
FGS Output
Output saturation voltage
Output leakage current
Speed Discriminator Output
Output high-level voltage
Output low-level voltage
Counts
Speed Control PLL Output
Output high-level voltage
Output low-level voltage
Lock Detection
Output saturation voltage
Output leakage current
Lock range
Integrator
Input offset voltage
Input bias current
Output high-level voltage
Output low-level voltage
Open-loop gain
Gain-bandwidth product
Reference voltage
VB(INT)
Design target value *
-5%
VIO(INT)
IB(INT)
VOH(INT)
VOL(INT)
IINTI = -0.1mA, No load
IINT = 0.1mA, No load
-10
-0.4
3.45
1.1
45
3.7
1.3
51
1.0
VCC/2
5%
10
0.4
3.95
1.5
mV
μA
V
V
dB
MHz
V
VOL(LD)
IL(LD)
ILD = 10mA
VO = VCC
-6.25
0.25
0.4
10
+6.25
V
μA
%
VOH(P)
VOL(P)
3.25
1.25
3.50
1.60
3.85
1.85
V
V
VOH(D)
VOL(D)
VCC-1.0
VCC-0.7
0.8
512
1.1
V
V
VO(FGS)
IL(FGS)
IO(FGS) =2mA
VO = VCC
0.2
0.4
10
V
μA
VB(FG)
f(FG) = 2kHz
45
-5%
51
VCC/2
5%
VIO(FG)
IB(FG)
VOH(FG)
VOL(FG)
IFGI = -0.1mA, No load
IFGI = 0.1mA, No load
Gain: 100×
-10
-1
3.6
0.7
3
100
180
250
2.34
3.95
1.05
10
1
4.3
1.4
mV
μA
V
V
mV
mV
kHz
dB
V
VSDL
VSDH
ΔVSD
3.40
3.55
0.12
3.74
3.93
0.19
4.00
4.23
0.26
V
V
V
ΔTSD
Design target value *
30
°C
TSD
Design target value *
150
180
°C
VRF
0.24
0.26
0.28
V
Symbol
Conditions
min
Ratings
typ
max
unit
*: Design target value and no measurement was made.
Continued on next page.
No.A0604-3/18
LB11921T
Continued from preceding page.
Parameter
FIL Output
Output source current
Output sink current
S/S Pin
Input high-level voltage
Input low-level voltage
Input open voltage
Hysteresis
Input high-level current
Input low-level current
Pull-up resistance
F/R Pin
Input high-level voltage
Input low-level voltage
Input open voltage
Hysteresis
Input high-level current
Input low-level current
Pull-up resistance
BR Pin
Input high-level voltage
Input low-level voltage
Input open voltage
Hysteresis
Input high-level
Input low-level current
Pull-up resistance
CLK Pin
Input high-level voltage
Input low-level voltage
Input open voltage
Hysteresis
Input high-level current
Input low-level current
Input frequency
Pull-up resistance
VIH(CLK)
VIL(CLK)
VIO(CLK)
ΔV
IN(CLK)
IIH(CLK)
IIL(CLK)
f(CLK)
RU(CLK)
37
53.5
Design target value *
VCLK = VCC
VCLK = 0V
2.0
0
VCC-0.5
0.13
-10
-135
0.22
0
-93
2.34
70
VCC
1.0
VCC
0.31
10
V
V
V
V
μA
μA
kHz
kΩ
VIH(BR)
VIL(BR)
VIO(BR)
ΔV
IN(BR)
IIH(BR)
IIL(BR)
RU(BR)
VBR = VCC
VBR = 0V
2.0
0
VCC-0.5
0.13
-10
-135
37
0.22
0
-93
53.5
70
VCC
1.0
VCC
0.31
10
V
V
V
V
μA
μA
kΩ
VIH(F/R)
VIL(F/R)
VIO(F/R)
ΔV
IN(F/R)
IIH(F/R)
IIL(F/R)
RU(F/R)
VF/R = VCC
VF/R = 0V
2.0
0
VCC-0.5
0.13
-10
-135
37
0.22
0
-93
53.5
70
VCC
1.0
VCC
0.31
10
V
V
V
V
μA
μA
kΩ
VIH(S/S)
VIL(S/S)
VIO(S/S)
ΔV
IN(S/S)
IIH(S/S)
IIL(S/S)
RU(S/S)
VS/S = VCC
VS/S = 0V
2.0
0
VCC-0.5
0.13
-10
-135
37
0.22
0
-93
53.5
70
VCC
1.0
VCC
0.31
10
V
V
V
V
μA
μA
kΩ
IOH(FIL)
IOL(FIL)
-17
7
-13
12
-7
17
μA
μA
Symbol
Conditions
min
Ratings
typ
max
unit
*: Design target value and no measurement was made.
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