lb11889m Sanyo Semiconductor Corporation, lb11889m Datasheet - Page 5

• Manufacturer Part Number: lb11889m
• Description: For Vcr Capstan Three-phase Brushless Motor Driver
• Manufacturer: Sanyo Semiconductor Corporation

Pin Functions
W IN +, W IN -
U IN +, U IN -
V IN +, V IN -
Rf (PWR)
Pin name
GSENSE
Rf (SNS)
FGIN (+)
FG-OUT
CTLREF
FGIN (-)
W OUT
U OUT
V OUT
GND
V CC
CTL
ADJ
LIM
FC
VS
FR
Pin no.
10, 11
12, 13
14, 15
16
21
22
23
31
26
27
28
32
33
34
3
4
5
6
7
8
9
Input pin for the FG amplifier to be used with inverted input.
A feedback resistor is connected between this pin and FG OUT.
Noninverting input pin for the FG amplifier to be used as differential input. No bias is applied internally.
FG amplifier output pin with resistive load internally.
Speed control pin. Control is performed by means of constant current drive which is applied by current feedback from Rf.
Control reference voltage pin. The voltage is set at approximately V CC /2 internally, but can be varied by applying a
voltage through a low impedance. (The input impedance is approximately 2.5kΩ.)
Current limiter function control pin. This pin voltage is capable of varying the output current linealy.
Slope = 0.5A/V TYP at Rf = 0.5Ω
Speed control loop’s frequency characteristics correction pin.
U phase hall element input pin. “H” for logic represents IN+>IN-.
V phase hall element input pin. “H” for logic represents IN+>IN-.
W phase hall element input pin. “H” for logic represents IN+>IN-.
Power supply pin used to supply to each circuit other than the output blocks inside the IC.
This voltage must be stabilized to reject noise and ripple.
Power supply pin for output blocks.
Pin to be used to adjust the torque ripple correction factor externally.
When adjusting the correction factor, apply voltage externally to the ADJ pin through a low impedance.
Increasing the applied voltage decreases the correction factor ; lowering the applied voltage increases the correction
factor.
The rate of change, when left open, ranges approximately from 0 to 2 times.
(Approximately V CC /2 is set internally and the input impedance is approximately 5kΩ.)
Output current detection pins. Current feedback is provided to the control blocks by connecting Rf between the pins and
GND. The operation of the lower over-saturation prevention circuit and torque ripple correction circuit depends on the pin
voltage.
In particular, since the oversaturation prevention level is set by the pin voltage, decreasing the Rf value extremely may
cause the lower over-saturation prevention to work less efficiently in the large current region. The PWR pin and SENSE
pin must be connected.
U phase output pin
V phase output pin
W phase output pin
GND sensing pin.
By connecting this pin to GND in the vicinity of the Rf resistor side of the Rf included motor GND wiring, the influence
that the GND common impedance exerts on Rf can be excluded. (Must not be left open.)
Forward/reverse select pin.
This pin voltage determines forward/reverse. (Vth = 2.5V typ. At V CC = 5V)
GND for other than output transistors.
The lowest potential of output transistors is on the Rf pin.
Gm = 0.65A/V & 1.50A/V TYP at Rf = 0.5Ω
(With spark killer diode built in)
LB11889M
Functions
No.8791-5/11