LB1690 Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LB1690

3-Phase Motor Driver

SANYO -> Panasonic 

LB1690

Pin Description

Pin Name

IN1+, IN1–

IN2+, IN2–

IN3+, IN3–

OUT1

OUT2

OUT3

VCC

VM

Rf

GND

FSR

FG1

FG2

Pin No.

17, 18

15, 16

13, 14

5

6

7

1

10

8

11

12

20

19

OUT1:Hall element input pins for Phase 1.

High logic is the state when IN+ > IN–.

Description

OUT2: Hall element input pins for Phase 2.

High logic is the state when IN+ > IN–.

OUT3: Hall element input pins for Phase 3.

High logic is the state when IN+ > IN–.

Output pin for Phase 1.

Output pin for Phase 2.

Output pin for Phase 3.

Power supply pin for applying voltage to each section other than output section.

Power supply for output section.

Output current detect pin; Rf is inserted between this pin and ground to detect the output current as

a voltage.

Ground for other output

The minimum potential of output transistor is at the Rf pin.

Forward/Stop/Reverse control pin.

The motor is driven forward, stopped, or driven in reverse according to the voltage at this pin.

Forward : 0 to 0.8V

Stop : 2.1 to 2.9V

Reverse : 4.2 to 5.0V

Output pin1 for speed pulses

Output pin2 for speed pulses

on-chip pull-up resistor.

on-chip pull-up resistor.

1. Position detection circuit (Hall element input circuit).

The posistion detection circuit is a differential amp with hysteresis (30mV typ.). For the operation DC level,

use within the common-mode phase input voltage range (1.5V to VCC–1.8V). Also it is recommended that

the input level is at least three times (120 to 160mVp-p) the hysteresis.

2. Current limiter circuit

The current is limited by moving the sink side transistor from saturated to unsaturated, so ASO can be a

problem.

I

=

VRf

Rf

(A)

Therefore, design so that as much as possible the current limiter is not triggered.

Also, take particular care not to exceed the maximum output current (2.5A) when the current limiter is

triggered. Add a current limitter to the VM current. (A current setting no greater than 60% to 70% of the

current value of current limitter circuit and a short delay time are recommended.)

3. Protection circuits

3-1. Low-voltage protection circuit

If the voltage at the VCC pin falls below the regulated voltage, the sink side output driver is switched

off. This circuit is to prevent malfunctioning.

3-2. Thermal shutdown circuit

If the junction temperature rises above the regulated temperature, just as in 3-1. the sink side output

driver is switched off.

4. Minimum voltage at VM power supply

Use a voltage greater than the VCC voltage for the VM power supply votlage.

VM≥VCC

5. FG output circuit

This circuit combines the IN1, IN2 and IN3 position detection signals, forms the wave, and outputs the

result. The frequency ot this output is proportinal to the rotation speed and is 1× (FG1) or 3× (FG2) when

seen from each position detection.

No.3294-4/5

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