AC POWER CONTROLLERS

DESCRIPTION:

The LS7310 - LS7313 are MOS integrated circuits specifically

designed for motor speed control applications in appliances

such as blenders, etc. I/Os (PLs) are provided for selecting/

indicating from one to ten power levels. The LS7310 and 7311

are designed for pushbutton control. The LS7312 and LS7313

are designed for touch control. (See Fig.4A and 4B)

INPUT/OUTPUT DESCRIPTION:

PL1 - PL10 (Pins 1 - 9, 18)

Ten inputs/outputs for selecting ten output phase angles (pow-

er levels). When no power level is selected (such as after sys-

tem power-up), PL1 - PL10 all act as inputs. When a power lev-

el is selected by applying a logic zero at one of these inputs for

switches status to become an output in order to drive a display,

such as an LED. It switches back to the input state only when

another PL input is activated. (See Note 1)

RUN (Pin 13)

put (TRIG) is turned on at a phase angle selected earlier by

one of the PL I/Os. If no power level was selected prior to the

application of the RUN input, the circuit remains unaffected.

Note that once the TRIG output has been enabled, its phase

angle can be altered by applying any other PL input without the

need to apply the RUN input again. (See Note 1)

OFF (Pin 11)

is turned off, if it was on. If TRIG was already off, the circuit re-

mains unaffected. Note that OFF input does not alter the power

level

selected by a PL input. Following an OFF operation,

TRIG can be turned on at the previous phase angle by applying

the RUN input. (See Note 1)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

PL2

PL3

PL4

PL5

PL6

PL7

PL8

PL9

PL10

PL1

TRIG

Vss (+V)

SYNC

CAP

RUN

PULSE

OFF

CONNECTION DIAGRAM - TOP VIEW

FIGURE 1

January 2003

7310-012703-1

APPLICATIONS:

Universal and shaded-pole motor speed control for modern

appliance designs. Eliminates awkward mechanical switch

assemblies and multi-tapped motor windings.

PULSE (Pin 12)

A logic 0 applied to this input turns the TRIG output on for

as long as the PULSE input is maintained. The PULSE input

however, has no effect if no power level is in selection or if

the TRIG output has already been turned on by means of

the RUN input. (See Note 1)

SYNC (Pin 15)

Input for PLL reference frequency (50Hz/60Hz). All internal

clock frequencies are synchronized with the SYNC input.

CAP (Pin 14)

Input for component connection for the PLL filter capacitor.

TRIG (Pin 17)

This output is designed to drive a triac in series with the

load and control its firing angle with respect to the AC line.

The LS7310 and LS7312 provide a nominal 33µs output

pulse width. Since some motors have large inductive loads

producing a large phase delay between voltage and current,

a wider output pulse may be required. The LS7311 and

LS7313 produce a 1ms output pulse width. Otherwise,

these parts are identical to the LS7310 and LS7312,

respectively.

Vss (Pin 16)

Supply voltage positive terminal.

Supply voltage negative terminal (ground).

NOTE 1: LS7310, LS7311 have an internal pullup resistor on this

input and LS7312, LS7313 do not. (See DC Electrical Character-

istics.)

LSI/CSI

LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405

LS7310-7313

UL

®

A3800

FEATURES:

LS7310-S thru LS7313-S (SOIC) - See Figure 1