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LB1877V Datasheet(PDF) 5 Page - Sanyo Semicon Device

Part No. LB1877V
Description  Brushless Motor Driver with Speed Control for Portable Cassette Recorders
Download  7 Pages
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Maker  SANYO [Sanyo Semicon Device]
Homepage  http://www.ssdc-jp.com/eng/
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 5 page
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LB1877V
No. 6200-5/7
Pin number
18
9
12
7
8
14
13
15
10
Pin Description
Unit (Resistance:
Ω, capacitance: F)
Pin name
VCC
GND
VREF
OSC
COM
VSP
IN+
OUT
RI
Pin voltage
1.8V to 5.0V
0.7V to 0.9V
1V to Vcc
1.3V to Vcc
0.1V to
Vcc – 0.7V
Equivalent circuit
Pin function
Power supply for all circuits
Ground for all circuits except
FC and power block.
Internal reference voltage.
Connected as speed control
voltage to IN+ pin via external
resistor.
Startup oscillator pin.
Adjusts self-excitation
frequency via external
capacitor.
Determines threshold voltage
of waveform detection circuit.
Connected to Vcc via an
external resistor.
Varies the startup threshold
voltage.
Peak detection circuit output
pin.
Error amplifier non-inverted
pin.
Controls rotation speed via
input pin voltage.
Error amplifier output pin.
Connect external resistor
between Vsp pins for
feedback.
Current feedback output pin.
Connect external resistor
between this pin and ground
for current feedback
adjustment.
Continued on next page
12
50k
200
7
To WOUT
To VOUT
To UOUT
To comparator input
20k
20k
20k
1k
20k
10k
8
Drive
current
I
10k
200
10k 10k
10k
To U,V,WOUT
200
5k
14
10
15
13




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