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 (v dd - v ss ) ? LS7317 (dip); LS7317-s (soic) -see figure 1- applications: ? 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 ac- tivation 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 dim- mer 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/ in- put 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 pl1/ pl2/ pl3/ pl4/ pl5/ boost/ % of full power: 40% 55% 69% 82% 96% 99% conduction angle 81 95 108 122 147 160 november 2005 7317-112405-1 lsi/csi l si c o m p u t e r sy s t e m s , i n c . 1 2 3 5 w a l t w h i t m a n r o a d , m e l v i l l e , n y 1 1 7 4 7 ( 6 3 1 ) 2 7 1 - 0 4 0 0 f a x ( 6 3 1 ) 2 7 1 - 0 4 0 5 LS7317 u l a3800 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 auto- pulse 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/ out- put to be turned on at the maximum conduction angle, cor- responding 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 cir- cuit 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 con- nected in series with the load. when on, the trig/ output pro- duces a 1.2ms/1ms wide negative pulse in each half-cycle of the 50hz/60hz ac at a predefined phase angle which cor- responds to the selected speed level. when off, trig/ sits at logic high. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 pl1/ pl2/ pl3/ pl4/ pl5/ trig/ v ss (-v) sync cap pulse/ off/ v dd (+v) lsi connection diagram - top view LS7317 figure 1 boost/ nc
v dd (pin 13) v ss (pin 11) supply voltage positive terminal. supply voltage negative terminal. 7317-101705-2 t w figure 2. trig/ phase angle, sync trig/ driver driver + - 7 6 9 1 5 control logic driver digital comparator power level rom phase angle pointer phase-locked loop and clock generator level 1 level 6 10 8 + - + - + - + - + - v ss v dd v ss v dd trig/ cap boost/ pulse/ off/ pl1/ pl5/ 12 figure 3. LS7317 block diagram sync v dd v dd v dd v dd v dd
input pull-up resistance: pl/, off/, run/, pulse/ r in 50 100 200 k w - output voltage: trig/ , hi v oh v dd - - v - trig/ , lo v ol - v ss - v - output current: trig/ , sink i os -35 - - ma v dd = +6v v ol = +3v pl/ sink i opl -5 - - ma v opl = +1v dynamic characteristics: symbol min typ max unit condition sync frequency f s 40 - 70 hz - pl/, run/, pulse/, off/ t h 50 - infinite ms 60hz sync hold time t h 60 - infinite ms 50hz sync trig/ pulse width t w - 1.0 - ms 60hz sync t w - 1.2 - ms 50hz sync maximum ratings: parameter symbol value unit storage temperature t stg -65 to +150 ? operating temperature t a 0 to +80 ? dc supply voltage v dd - v ss +7 v any input voltage v in v dd - 0.3 to v ss + 0.3 v dc electrical characteristics: (t a = 25?c, all voltages referenced to v ss ) symbol min typ max unit condition supply voltage v dd +5.4 +6 +6.6 v - supply current i dd - 160 200 ua v dd = 6v, outputs off input voltage: sync , lo v isl 0 - 1/3v dd v - sync , hi v ish 2/3v dd - v dd v - all other inputs , lo v il 0 - 1/4v dd v - all other inputs , hi v ih 1/2v dd - v dd v - input current: sync input i h - - 110 ? with series 1.5m w resistor to 115vac 7317-101705-3 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.
note: r4-c6 snubber network and/or c7 may be required for certain motors. 7317-111605-4 c1 = 0.15?, 200v (400v) * r1 = 56 w , 1/2w l = 100? (200?) * c2 = 0.68?, 200v (0.47?, 400v) * r2 = 1.5m w z1 = 6.8v ?5%, 1w c3 = 0.022? r3 = 1k w (for 5ma leds) d1, d2 = 1n4148 c4 = 470pf r4 = 1.8k w , 1w (2w) * t = q2006l4 (q4006l4) * , typical c5 = 470? r5 = 100 w c6 = 0.47?, 200v (400v) * r6 = 1k w all resistors 1/4w, all capacitors 25v unless otherwise specified. *indicates component change for 220vac mains. c1 = 0.15?, 200v (400v) * r1 = 56 w , 1w l = 100? (200?) * c2 = 1.0?, 200v (0.82?, 400v) * r2 = 1.5m w z1 = 10v ?5%, 1w c3 = 0.022? r3 = 1k w (for 5ma leds) d1, d2 = 1n4148 c4 = 470pf r4 = 1.8k w , 1w (2w) * t = q2006l4 (q4006l4) * , typical c5 = 220uf r5 = 100 w u1 = l79l06 regulator (or equivalent) all resistors 1/4w, all capacitors 25v unless otherwise specified. *indicates component change for 220vac mains. figure 4. 5-speed blender controller application figure 5. 5 - intensity level light dimmer application p n l mt2 g mt1 c1 r2 r5 c2 z1 c5 d1 - c4 c3 12 sync cap 13 10 11 r3 v ss off/ LS7317 v dd trig/ ac mains t d2 + r1 load pl1/ pl2/ pl3/ pl4/ pl5/ 8 1 2 3 4 5 9 u1 in out m p n l mt2 g mt1 c1 r1 r2 r5 c2 z1 c5 d1 - c4 c3 12 8 sync cap 13 10 9 7 6 5 1 11 r3 v ss pulse/ off/ pl5/ pl1/ LS7317 v dd r4 c6 trig/ ac mains see note t d2 r6 boost/ +
|
