LB11985 Sanyo, LB11985 Datasheet - Page 8

• Manufacturer Part Number: LB11985
• Description: VCR Capstan Motor Brushless Motor Driver
• Manufacturer: Sanyo

Continued from preceding page.
Pin No.
22
23
25
24
26
27
28
CTLREF
Symbol
CTL
V
ADJ
LIM
FC
FR
CC
4.5 V to 5.5 V
(V
Pin Voltage
0 V to V
0 V to V
0 V to V
1 V to 4 V
CC
= 5 V)
CC
CC
CC
Control reference voltage.
Although this voltage is set to V
internally, it can be modified by applying a voltage
from a low-impedance circuit.
Frequency characteristics correction.
Oscillation in the current control system closed loop
can be prevented by inserting a capacitor between
this pin and ground.
Speed control.
Control consists of a constant current drive scheme
implemented by applying current feedback from
RF.
Forward/reverse control.
The voltage applied to this pin selects forward or
reverse operation.
Power supply for all circuits other than the IC
internal output block.
This voltage must be stabilized so that ripple and
noise do not enter the IC.
Current limiter function control.
The voltage applied to this pin modifies the output
current linearly.
External torque ripple correction ratio adjustment.
To adjust the correction ratio, apply the stipulated
voltage to the ADJ pin from a low-impedance
external circuit.
If the applied voltage is increased, the correction
ratio rises, and if the applied voltage is lowered, the
correction ratio falls.
Description
LB11985H
CC
(15/35)
23
26
6 k
300
24
6 S
1 k
500
45 k
50 A
Equivalent circuit
18 k
Unit (resistance : Ω, current : A )
50 A
6 k
300
V CC
V CC
22
V CC
V CC
25
V CC
No. 6209-8/9
27
A13022
A13023
A13024
A13025
A13026