LB1877V 查看數據表（PDF） - SANYO -> Panasonic
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LB1877V Datasheet PDF : 7 Pages
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Pin Description
Pin number Pin name Pin voltage
18
VCC 1.8V to 5.0V
9
GND
12
VREF 0.7V to 0.9V
7
OSC 1V to Vcc
LB1877V
Equivalent circuit
Unit (Resistance: Ω, capacitance: F)
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
12
resistor.
50k
7
200
Startup oscillator pin.
Adjusts self-excitation
frequency via external
capacitor.
8
COM 1.3V to Vcc
To comparator input
10k
8
To UOUT To VOUT To WOUT
1k 20k
20k
20k
20k
Determines threshold voltage
of waveform detection circuit.
Connected to Vcc via an
external resistor.
Varies the startup threshold
voltage.
14
VSP 0.1V to
Vcc – 0.7V
13
IN+
15
OUT
10
RI
To U,V,WOUT
10k 10k 10k
14
5k 200
Drive I
current
10k
200
13 15 10
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
No. 6200-5/7
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