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LB11851M Arkusz danych(PDF) 4 Page - Sanyo Semicon Device

Numer części LB11851M
Szczegółowy opis  Monolithic Digital IC Microprocessor Fan Motor Interface Driver
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Producent  SANYO [Sanyo Semicon Device]
Strona internetowa  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LB11851M Arkusz danych(HTML) 4 Page - Sanyo Semicon Device

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LB11851M
No.A0673-4/6
1. Power supply (VCC and VM) and ground
The wiring is separated into the control IC side (VCC line) and the motor output side (VM line) by the diode DI, which
protects the IC from destruction on reverse connection. The application circuit uses 1
µF capacitors to prevent line
oscillation when kickback occurs. Similarly, 1
µF capacitors are also used on the VCC line for power supply line
stabilization.
2. PWMIN
The LB11851M accepts an open-drain output signal from the microcontroller with this pin and controls the on/off
states of the PMOS transistor (OUT1P and OUT2P) outputs accordingly. A constant-current bias is provided from
5VREG internally to the IC.
3. FGIN
The LB11851M accepts a CMOS output from the microcontroller with this pin and determines the drive phase output
(OUT1P, OUT2P, OUT1N, or OUT2N).
4. 5VREG
This is the power supply for the microcontroller, Hall effect sensors, and other circuits. A capacitor with a value of
1
µF is used for output stabilization. This pin has an output current capacity of 20mA.
5. SENSE
A sensing resistor is used for current detection. If the SENSE pin voltage exceeds 0.2V, the PMOS transistors are
turned off and only low side regeneration is performed.
Block Diagram
GND
OUT2P
OUT2N
OUT1N
5VREG
PWMIN
VCC
FGIN
OUT1P
100
300
20k
20k
100
300
20k
20k
SENSE
Controller
5VREG
5VREG
5VREG


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