LB1928_08 SANYO [Sanyo Semicon Device], LB1928_08 Datasheet - Page 6

• Manufacturer Part Number: LB1928_08
• Description: For Office Automation Equipment 3-phase Brushless Motor Driver
• Manufacturer: SANYO [Sanyo Semicon Device]

Pin Description
Pin No.
28
10
1
2
3
5
4
6
7
8
9
OUT1
OUT2
OUT3
GND2
VM
V CC
VREG
PWM
CSD
XI
XO
Pin name
Motor drive output pins.
Connect a Schottky diode between these outputs and V CC .
Output ground pin.
Output block power supply and output current detection pin.
Connect a resistor (Rf) between this pin and V CC to detect the
output current as a voltage.
The output current is limited according to the equation I OUT =
V RF /R f .
Power supply pin (except for output block).
Regulated power supply output pin (5V output).
Connect a capacitor (approx. 0.1µF) between this pin and
ground to stabilize the output.
PWM frequency setting pin.
Connect a capacitor between this pin and ground.
C = 3900pF results in a frequency of about 18kHz.
Lock protection circuit operation time setting pin.
Connecting a capacitor of about 10µF between this pin and
ground results in a protection circuit operation time of about
3.3 seconds.
Crystal oscillator pins.
Connect to quartz oscillator to generate the reference clock.
When an external clock (of several MHz) is used, the clock
signal should be input via a resistor of about 5.1kΩ connected
in series with the XI pin. In this case, the XO pin must be left
open.
Pin function
LB1928
Equivalent circuit
Continued on next page.
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