LSI LS7315-S, LS7315, LS7314-S, LS7314 Datasheet

AC POWER CONTROLLERS

DESCRIPTION:

The LS7314 - LS7315 are MOS integrated circuits specifically
designed for appliance motor speed control, lighting control,
etc. I/Os (PLs) are provided for selecting/indicating from one to
ten power levels. The LS7315 is designed for pushbutton con­trol. The LS7314 is designed for touch control. (See Figures 4A
and 4B)

INPUT/OUTPUT DESCRIPTION:
PL1-PL10 (Pins 1-8, 15, 16)

Ten inputs/outputs for selecting ten output phase angles (pow­er levels). When no power level is selected (such as after sys­tem power-up) PL1-PL10 all act as inputs. When a power level
is selected by applying a logic zero at one of these inputs for
TH time (See Dynamic Characteristics), the output (TRIG) is
turned on at the phase angle selected and the PL input switch­es status to become an output in order to drive a display, such
as an LED. It switches back to the input state when another PL
input is activated or when OFF is selected. (See Note 1)

OFF (Pin 10)

If TRIG is on, a logic 0 applied to the OFF input for TH time
turns TRIG output off and switches the selected PL back to the
input state. If TRIG is off, activating OFF leaves the circuit un­affected. Following an OFF activation, TRIG can be turned on
by applying any PL input. (See Note 1)

SYNC (Pin 12)

Input for PLL reference frequency (50Hz/60Hz). All internal
clock frequencies are synchronized with the SYNC input.

CAP (Pin 11)

Input for component connection for the PLL filter capacitor.

1

2

3

4
5

6

7

8

9

10

11

12

13

14

15

16

PL3

PL4
PL5

PL6

PL7

PL8
PL9

PL10

PL2

TRIG

Vss (+V)

SYNC

CAP

OFF
VDD (-V)

LSI

CONNECTION DIAGRAM - TOP VIEW

LS7314

FIGURE 1

PL1

A

7314-040197-1

APPLICATIONS:

• Universal and shaded-pole motor speed control for modern
appliance designs. Eliminates awkward mechanical switch
assemblies and multi-tapped motor windings. (See Fig. 4C)

• Multi-level light switches. (See Fig. 4D)

TRIG (Pin 13)

This output is designed to drive a triac in series with the
load and control its firing angle with respect to the AC line.
A 1ms output pulse width is provided to enable the triac to
fire even with inductive loads which cause significant phase
delays between voltage and current.

Vss (Pin 14)

Supply voltage positive terminal.

VDD (Pin 9)

Supply voltage negative terminal (ground).
NOTE 1: LS7315 has an internal pullup resistor on this in-

put and LS7314 does not. (See DC Electrical Character­istics.)

LSI/CSI

LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 [phone] FAX [phone]

LS7314-7315

U

L

®

A3800

Ø

TW

FIGURE 2. TRIG PHASE ANGLE Ø

SYNC

TRIG

FEATURES:

• 10 I/Os to Select/Indicate up to ten Power Levels

• Inputs activated by Touch or Pushbutton Switch

• Output switches pure and precise AC Power to Load

• Operates with 50Hz/60Hz line frequency

• Rugged, latchup-free process technology

• +10V to +14V operation (Vss-VDD)

• LS7314, LS7315 (DIP;

LS7314-S, LS7315-S (SOIC) - See Figure 1

7314-033197-2

*LS7314 & LS7315 **LS7315-51

(1) The TRIG Phase Angles shown in TABLE 1 are referenced

to the SYNC input. Ø values are mask programmable.

(2) The percentage of Full Power delivered to a resistive load

by the Triac Switch.

FIGURE 4C VALUE TABLE
CONDITION C2(µF)

(1), (3) 0.47

(1), (4) 0.33
(2), (3) 0.68
(2), (4) 0.47

(1) No LEDs (2) 5mA LEDs
(3) 115VAC, C2 = 200V (4) 220VAC, C2 = 400V

FIGURE 4C and 4D NOTES

NOTE 1: Value for 5mA LEDs.
NOTE 2: Use zener which produces 6.2V ±5% at 500µA or

less, i. e. P/N MZ4627.
NOTE 3: R6-C6 Snubber Network may be required for large
inductive loads.
NOTE 4: Tie all unused touch inputs together and return to Vss
through 100k Ohm, 1/4W resistor.
NOTE 5: The AC Mains Polarity shown is required for Touch
Control applications.

DRIVER

DRIVER

10

15

8

CONTROL

LOGIC

DRIVER

DIGITAL

COMPARATOR

POWER

LEVEL

ROM

PHASE

ANGLE

POINTER

PHASE-LOCKED

LOOP

AND

CLOCK

GENERATOR

LEVEL 1

LEVEL 10

11

+

-

+

-

+

-

VSS

VDD

TRIG

CAP

OFF

PL1

PL10

13

FIGURE 3. LS7314-LS7315 BLOCK DIAGRAM

12

+

-

VSS

VDD

SYNC

TABLE 1. TRIG PHASE ANGLES, Ø (1)
PL Ø * % PWR (2) Ø ** %PWR (2)

1 43° 8 81° 40
2 55° 16 105° 67
3 68° 26 116° 77
4 81° 40 120° 80
5 95° 55 123° 83
6 108° 69 129° 87
7 122° 82 134° 90
8 134° 90 160° 99
9 147° 96 167° 99

10 160° 99 175° 99

R3

OFFPL1PL10

FIGURE 4A. PUSHBUTTON INTERFACE FOR LS7315

VDD

R3 = 10K , 1/4W

R8

R8

R7

R8

R8

R7

R8

R8

R7

Vss

TP TP TP

PL10 PL1 OFF

FIGURE 4B. TOUCH INTERFACE FOR LS7314

SEE NOTE 4

R7 = 1M to 5M , 1/4W (Select for Sensitivity)
R8 = 2.7M , 1/4W for 115VAC Mains
R8 = 4.7M , 1/4W for 220VAC Mains