Home Appliance Electronic Control Devices - SmartData
Home Appliance Electronic Control Devices - SmartData
Home Appliance Electronic Control Devices - SmartData
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14<br />
LB11920<br />
LB1975/76<br />
Three-phase brushless motor driver IC Three-phase brushless motor driver IC<br />
Applications<br />
Motor drive in applications in which support for a wide range of supply voltages (9.5 to 30 V) and<br />
support for control based on the PWM duty of an input signal are advantageous.<br />
Functions and Features<br />
Three-phase bipolar drive (35 V, 3.5 A), can<br />
be used with a signal power supply (just the<br />
motor power supply).<br />
Direct PWM drive output<br />
Built-in output high and low side kickback<br />
absorption diodes<br />
Braking function (short-circuit braking)<br />
Forward/reverse switching circuit<br />
5V VCC<br />
+<br />
GND1<br />
GND3<br />
TOC<br />
PWM<br />
PWM<br />
OSC<br />
RESET<br />
VREF<br />
S/S<br />
-<br />
+<br />
PWM<br />
IN<br />
F/R<br />
LVSD<br />
BR<br />
S/S PWMIN F/R BR HP<br />
Vcc<br />
N1<br />
Full complement of built-in protection circuits,<br />
including current limiter circuit, undervoltage<br />
protection circuit, motor constraint protection<br />
circuit, and thermal protection circuit<br />
Motor operation can be controlled by the<br />
duty of the input PWM signal.<br />
FG output circuit<br />
Package: DIP28H<br />
CSD<br />
CIRUIT<br />
HALL HYS AMP<br />
N2<br />
CSD<br />
HALL LOGIC<br />
+<br />
LOGIC<br />
N3<br />
TSD<br />
DRIVER<br />
CURR<br />
LIM<br />
GND2<br />
VM<br />
RF<br />
OUT1<br />
OUT2<br />
OUT3<br />
Rf<br />
27V<br />
+<br />
Applications<br />
Direct PWM drive for DC fan motors used in air conditioners and water heaters.<br />
Functions and Features<br />
Built-in shunt regulator circuit makes use<br />
with a single power supply (motor power<br />
supply only) possible.<br />
High breakdown voltage, high current<br />
LB1975: 45V/2.5A,<br />
LB1976: 60V/2.5A<br />
Direct PWM drive output<br />
Current limiter circuit<br />
VCC<br />
VCC Reg<br />
+<br />
LVSD STD<br />
VCTL<br />
+<br />
IN1<br />
IN2<br />
IN3<br />
VCTI<br />
VREG S/S F/R FG1 FG2<br />
Hys.Amp<br />
+<br />
-<br />
+<br />
-<br />
+<br />
-<br />
40kΩ<br />
31kΩ<br />
VCTL Amb<br />
-<br />
+<br />
2.35V<br />
VCREF VCOUT<br />
Logic<br />
PWM<br />
OSC<br />
Three built-in output high side diodes<br />
FG output circuit<br />
Package:<br />
LB1975: DIP28H<br />
LB1976: DIP28H<br />
Current<br />
Limiter<br />
OSC GND1 GND2 GND3<br />
0.5V<br />
VM<br />
OUT1<br />
OUT2<br />
OUT3<br />
RF<br />
+<br />
Rf<br />
Motor drivers<br />
VM<br />
15
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