LB1845(1996) Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Lista de partido

LB1845
(Rev.:1996)

Monolithic Digital IC PWM Current Controlling Stepping Motor Driver

SANYO -> Panasonic 

LB1845

Pin Functions

Pin no.

1, 14

2

13

3

12

4, 11

6

7

8

9

15

27

16

26

17

25

18

24

19

22, 23

21, 20

28

Pin

VBB

SENSE1

SENSE2

E1

E2

D-GND

OUT 1B

OUT 1A

OUT 2B

OUT 2A

GND

RC1

RC2

VREF1

VREF2

PHASE1

PHASE2

ENABLE1

ENABLE2

I01, I11

I02, I12

VCC

Function

Output stage power-supply voltage

Set current detection pins.

Connect these pins, fed back through noise filters, to E1 and E2.

The set current is controlled by the resistors Re inserted between these pins and ground.

Internal diode anode connection

Outputs

Ground

Used to set the output off time for the switched output signal.

The fixed off times are set by the capacitors and resistors connected to these pins. toff = CR.

Output current settings

The output current is determined by the voltage (in the range 1.5 to 7.5 V) input to these pins.

Output phase switching inputs.

High-level input: OUT A = high, OUT B = low

Low-level input: OUT A = low, OUT B = high

Output on/off settings

High-level input: output off

Low-level input: output on

Digital inputs that set the output current

The output currents can be set to 1/3, 2/3, or full by setting these pins to appropriate combinations of high and low levels.

Logic block power supply

Timing chart for pin switching operations during PWM drive

Figure 1 Switching Waveforms

toff: Output off time. Determined by external capacitor and resistor Ct and Rt. (toff = Ct × Rt)

td: Delay time between the point the set current is sensed at the SENSE pin and the point the output turns off.

No. 5505-4/7

Share Link: