LB1821 Sanyo, LB1821 Datasheet - Page 15

• Manufacturer Part Number: LB1821
• Description: Power Brushless Motor Pre-Driver IC for OA Equipment
• Manufacturer: Sanyo

Continued from preceding page.
Pin No.
33
34
35
36
37
CROCK
V
CR
Pin
REG
R
C
7-V shunt regulator output
PWM oscillator frequency setting
Reference signal oscillator connection. This oscillator is
used by the motor constraint detection circuit, the clock
disconnection protection circuit, and other circuits.
A protection operation time of about 2.1 seconds can be set
up by connecting a capacitor of about 0.047 µF between
this pin and ground.
Setting for the charge current used for the VCO circuit C pin
Connect a resistor between this pin and ground. The value
of that resistor must not be lower than 2.7 kΩ.
VCO oscillator connection. This pin sets the VCO
frequency.
Connect a capacitor between this pin and ground.
Set the value of the capacitor so that the oscillator
frequency does not exceed 1 MHz.
Functions
LB1821M
Equivalent circuit
Continued on next page.
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