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UL
(R)
LSI/CSI
LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747
LS7317
(631) 271-0400 FAX (631) 271-0405
November 2005
A3800
5-SPEED AC MOTOR CONTROLLER / 5-STEP LAMP DIMMER
FEATURES: * Inputs/Outputs for selecting and displaying 5 speed/power levels Electronically latched inputs with dome switch compatibility * Separate Boost input for full-speed/power selection * Separate Pulse input for periodic on/off cycle selection * +6V Operation (VDD - VSS) * LS7317 (DIP); LS7317-S (SOIC) -See Figure 1Applications: * Consumer Appliances such as Blenders, Range Hoods, Fans, etc. * Lamp Dimmer for control of high-voltage lamps and electronic-transformer coupled low-voltage lamps such as Halogen Lamps. DESCRIPTION: The LS7317 is a MOS circuit for controlling the speed of an AC motor. Five inputs, PL1/ through PL5/ are provided to select five speed/power levels between 40% and 96% of full power. A BOOST/ input is provided to override any selected power level with a jump to 99% of full power. A PULSE/ input provides for periodic two seconds on, two seconds off auto-pulse cycle for one minute. All these inputs require momentary activation which can very conveniently be produced by push-button dome or leaf switches. When a logic low is applied through such a push-button switch to any of the speed inputs or the Pulse input, the input becomes active and switches state to become an output for driving an external LED and display the selected speed level. A TRIG/ output is also turned on to drive the trigger input of a triac in series with the motor and control its speed by controlling the firing angle of the triac. Phase synchronization of the external AC and the triac trigger is made with an internal PLL, with the AC signal being applied to the SYNC input of the LS7317. An OFF/ input is provided for turning the motor off with a momentary push-button switch. The LS7317 can also be used as a Lamp Dimmer providing 5 selectable intensity levels as indicated in the application schematic shown in Figure 5. The LOAD can be either a high voltage lamp or the input to an electronic-transformer coupling to a low-voltage lamp. In the Lamp Dimmer application, the Pulse/ and Boost/ inputs are not used INPUTS/OUTPUTS PL1/ - PL5/ (Pin 1 - Pin 5) Five inputs/outputs for selecting five speed/power levels. When no power level is selected, such as upon a system power-up, PL1/ - PL5/ all act as inputs. When a power level is selected by applying a logic low at one of these inputs for the duration of TH (see Transient Characteristics section), the output TRIG/ is turned on at the selected phase angle and the PL/ input switches state to become a current-sinking output in order to drive a display, such as an LED. It switches back to the input state when another PL/ input or the OFF/ input is activated. Power levels and triac conduction angles referenced to the SYNC input (Pin 10) for each PL/ and Boost/ are shown in Table 1. TABLE 1 PL3/ PL4/ 69% 82% 108 122
CONNECTION DIAGRAM - TOP VIEW
PL1/ PL2/ PL3/ PL4/ PL5/ PULSE/ BOOST/ 14 13 12 11 10 9 8 NC V DD (+V)
LSI LS7317
FIGURE 1
1 2 3 4 5 6 7
TRIG/
V SS ( - V ) SYNC OFF/ CAP
PULSE/ (Pin 6) A logic low applied to the PULSE/ input initiates the auto-pulse cycle and causes the PULSE/ input to switch from an input to an output state. Subsequently, when a speed level is selected, the TRIG/ output is turned on for two seconds, then turned off for two seconds. The two second on, two second off cycle is repeated for one minute. At the end of one minute the autopulse cycle is terminated with the TRIG/ output off and the PULSE/ pin reverting back to the input state. BOOST/ (Pin 7) A logic low applied to the BOOST/ input causes the TRIG/ output to be turned on at the maximum conduction angle, corresponding to 99% of full power. The boost state overrides any prevalent state and continues as long as the BOOST/ input is held at logic low. Upon returning BOOST/ to logic high, the circuit returns to and continues in the pre-Boost state. OFF/ (Pin 9) A logic low applied to the OFF/ input turns the TRIG/ output off, aborts any auto-pulse cycle in progress and causes any active PL/ pin or the PULSE/ pin to switch from the output to the input state. CAP (Pin 8) Input for the PLL external filter capacitor connection. SYNC (Pin 10) Input for the PLL 50Hz/60Hz AC reference signal. All internal timings are synchronized with the SYNC input. TRIG/ (Pin 12) The TRIG/ output is designed to drive the gate of a triac connected in series with the load. When on, the TRIG/ output produces a 1.2ms/1ms wide negative pulse in each half-cycle of the 50Hz/60Hz AC at a predefined phase angle which corresponds to the selected speed level. When off, TRIG/ sits at logic high.
PL1/ % of Full Power: 40% Conduction Angle 81
PL2/ 55% 95
PL5/ BOOST/ 96% 99% 147 160
7317-112405-1
VDD (Pin 13) Supply voltage positive terminal.
VSS (Pin 11) Supply voltage negative terminal.
FIGURE 2.
TRIG/ PHASE ANGLE, O
SYNC
O
TRIG/
TW
V DD
BOOST/
7 V DD
+ V DD
LEVEL 1 POWER LEVEL ROM LEVEL 6
PULSE/ 6
+ CONTROL LOGIC
OFF/
9
V DD
+
DRIVER
PHASE ANGLE POINTER
DIGITAL COMPARATOR DRIVER
12 TRIG/
PL1/
1
V DD
+
DRIVER
PL5/
5 V DD
+
SYNC 10
PHASE-LOCKED LOOP AND CLOCK GENERATOR
V DD
+
8 CAP
V SS
V SS
FIGURE 3. LS7317 BLOCK DIAGRAM
7317-101705-2
MAXIMUM RATINGS: PARAMETER Storage Temperature Operating Temperature DC Supply Voltage Any Input Voltage DC ELECTRICAL CHARACTERISTICS: (TA = 25C, all voltages referenced to VSS)
SYMBOL TSTG TA VDD - VSS VIN
VALUE -65 to +150 0 to +80 +7 VDD - 0.3 to VSS + 0.3
UNIT C C V V
Supply Voltage Supply Current Input Voltage: SYNC, LO SYNC, HI All other inputs, LO All other inputs, HI Input Current: SYNC Input
SYMBOL VDD IDD
MIN +5.4 -
TYP +6 160
MAX +6.6 200
UNIT V uA
CONDITION VDD = 6V, outputs off
VISL VISH VIL VIH
0 2/3VDD 0 1/2VDD
-
1/3VDD VDD 1/4VDD VDD
V V V V
-
IH
-
-
110
A
With Series 1.5M Resistor to 115VAC
Input Pull-up Resistance: PL/, OFF/, RUN/, PULSE/ Output Voltage: TRIG/, HI TRIG/, LO Output Current: TRIG/, Sink PL/ Sink
RIN 50 100 200 k -
VOH VOL
VDD -
VSS
-
V V
-
IOS IOPL
-35 -5
-
-
mA mA
VDD = +6V VOL = +3V VOPL = +1V
DYNAMIC CHARACTERISTICS: SYMBOL SYNC frequency PL/, RUN/, PULSE/, OFF/ Hold time TRIG/ Pulse Width
fS TH TH Tw Tw
MIN
40 50 60 -
TYP
1.0 1.2
MAX
70 infinite infinite -
UNIT
Hz ms ms ms ms
CONDITION
60Hz SYNC 50Hz SYNC 60Hz SYNC 50Hz SYNC
The information included herein is believed to be accurate and reliable. However, LSI Computer Systems, Inc. assumes no responsibilities for inaccuracies, nor for any infringements of patent rights of others which may result from its use.
7317-101705-3
FIGURE 4. 5-SPEED BLENDER CONTROLLER APPLICATION
P G R4 C1 C6
MT1 T MT2
D2
+
Z1
C5 C3
C4
R5
AC MAINS
SEE NOTE
L C2
D1
13 V DD 10
SYNC PL1/ PL5/
12
TRIG/
8
CAP
11 LS7317 V SS
P U L S E / B O O S T / OFF/
M
R1
R2
1
5
6
7
9
N
R3
R6
NOTE: R4-C6 Snubber network and/or C7 may be required for certain motors. C1 = 0.15F, 200V (400V)* R1 = 56, 1/2W L = 100H (200H)* C2 = 0.68F, 200V (0.47F, 400V)* R2 = 1.5M Z1 = 6.8V 5%, 1W C3 = 0.022F R3 = 1k (For 5mA LEDs) D1, D2 = 1N4148 C4 = 470pF R4 = 1.8k, 1W (2W)* T = Q2006L4 (Q4006L4)*, Typical C5 = 470F R5 = 100 C6 = 0.47F, 200V (400V)* R6 = 1k All resistors 1/4W, all capacitors 25V unless otherwise specified. *Indicates component change for 220VAC Mains.
FIGURE 5. 5 - INTENSITY LEVEL LIGHT DIMMER APPLICATION
P G
MT1 T C1 MT2 Z1 D1 L AC MAINS D2
+
-
C5 C4 R5
C3
R1
C2
13 V DD 10
SYNC PL1/
12
TRIG/
8
CAP
11 LS7317
PL2/ PL3/ PL4/ PL5/
V SS
OFF/
R2 IN LOAD U1 OUT
1
2
3
4
5
9
N
R3
C1 = 0.15F, 200V (400V)* C2 = 1.0F, 200V (0.82F, 400V)* C3 = 0.022F C4 = 470pF C5 = 220uF
R1 = 56, 1W R2 = 1.5M R3 = 1k (For 5mA LEDs) R4 = 1.8k, 1W (2W)* R5 = 100
L = 100H (200H)* Z1 = 10V 5%, 1W D1, D2 = 1N4148 T = Q2006L4 (Q4006L4)*, Typical U1 = L79L06 Regulator (or equivalent)
All resistors 1/4W, all capacitors 25V unless otherwise specified.
7317-111605-4
*Indicates component change for 220VAC Mains.

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