LB1980H_07 SANYO [Sanyo Semicon Device], LB1980H_07 Datasheet - Page 5

• Manufacturer Part Number: LB1980H_07
• Description: For VCR Capstan Motors 3-Phase Brushless Motor Driver
• Manufacturer: SANYO [Sanyo Semicon Device]

Pin Function
Pin No.
27
28
22
23
10
14
1
4
5
5
6
7
8
9
Pin Name
GSENSE
(SENSE)
FG OUT
W OUT
(PWR)
U OUT
FG IN +
V OUT
FG IN -
GND
ADJ
V S
FR
FC
Rf
Rf
U phase output, Spark killer diodes are built-in.
V phase output, Spark killer diodes are built-in.
W phase output, Spark killer diodes are built-in.
Output current detection. The control block current limiter
operates using the resistor Rf connected between these
pins and ground. Also, the lower side saturation
prevention circuit and the torque ripple correction circuit
operate based on the voltages across this resistor. It is
especially important to note that, since the saturation
prevention level is set using this voltage, the lower side
saturation prevention circuit will become less effective in
the high current region if the value of Rf is lowered
excessively. Also, the PWR and SENSE pins must be
connected together.
Output block power supply
Ground sensing. The influence of the common ground
impedance on Rf can be excluded by connecting this pin
to nearest ground for the Rf resistor side of the motor
ground wiring that includes Rf. (This pin must not be left
open.)
Forward / reverse selection. The voltage applied to this
pin selects the motor direction (forward or reverse).
(Vth=2.5V at V CC =5V (typical))
Used for external adjustment of the torque ripple
correction ratio. Apply a voltage externally with a
low-impedance circuit to the ADJ pin to adjust the
correction ratio. The correction ratio falls as the applied
voltage is increased, and increases as the applied voltage
decreases. The torque ripple correction ratio can be
modified by factors in the range 0 to 2 times the ratio that
applies when his pin is left open. (The pin voltage is set to
about V CC / 2 internally, and the input impedance is about
5kΩ.)
Ground for all circuits other than the output transistors.
The lowest potential of the output transistors is that of the
Rf pin.
Input used when the FG amplifier is used as an inverting
input. A feedback resistor must be connected between
FG OUT and this pin.
Non-inverting input used when the FG amplifier is used as
a differential input amplifier. No bias is applied internally.
FG amplifier output. There is an internal resistive load.
Speed control loop frequency characteristics correction.
Function
LB1980H
FR
6
200Ω
Rf (PWR)
24
V CC
FG IN (−)
V CC
9
300Ω
30kΩ
200µA
V CC
2kΩ
300Ω
27
28
1
Equivalent circuit
V CC
1/2
5µA
OUT
FG OUT
200Ω
V CC
10
V S
22
ADJ
23
Rf (SENSE)
V CC
V CC
Lower side saturation
prevention circuit input block
10kΩ
10kΩ
4
Continued on next page.
150µA
6kΩ
300Ω
200Ω
V CC
FG IN (+)
500Ω
8
V CC
10kΩ
FC
14
20µA
V CC
No.5974-5/7
10µA
10kΩ
10kΩ
6kΩ
V CC