sigma reserve the right to modi fy the document without notice. page 1 of 9 specification SGL8022W single-channel dc led control touch chip version 1.6
sigma reserve the right to modi fy the document without notice. page 2 of 9 SGL8022W single-channel dc led control touch chip contents 1. general desc ription .............................................................................................3 2. features .....................................................................................................................3 3. packaging and pin assignme nt ..........................................................................5 4. packaging in formation ........................................................................................6 5. application circuit ................................................................................................7 6. electrical char acteristi cs ..............................................................................8 7. bom tabl e ...................................................................................................................9
sigma reserve the right to modi fy the document without notice. page 3 of 9 SGL8022W single-channel dc led control touch chip 1. general description SGL8022W is a single-channel touch ch ip for led lightness regulation. this chip can control the on-off state of led light and regulate its lightnes s on a continuous range, which could be used on incandescent and halogen. ? lightness could be regulated optionally on a wi de range with a low operational difficulty. ? high applicability. touching function is still effe ctive with the existanc e of medium (such as glass, arcrylic, plastic, ceram, etc.) isolation. ? a wide range of applied voltage, which coul d be chosen optionally within 2.4v~5.5v. ? low cost. SGL8022W could be drived by a si mple peripheral circuit, easy to machining. ? high stability and good anti-interfere proper ty. SGL8022W has a value of eft over 2kv. under the interference of mobile phones which exist in a near-f ield and multi-angle situation, the touching sensit ivity and response time of SGL8022W proves to be fine. 2. features ? a touch operation through ti corresponds to the output of so , which could control lightness of led. four functional options are available, which are determined by input state of opt1 and opt2 before electrified: 1) opt1=1, opt2=1: regulate lightness discretely without lightness-memory. 2) opt1=0, opt2=1: regulate lightness continuously without lightness-memory. 3) opt1=1, opt2=0: regulate lightness continuously with lightness-memory. 4) opt1=0, opt2=0: regulate lightness on a three-sections mode. ? the function that regulate light ness of led discretely without li ghtness-memory is as follows: ? light hold off state when the ci rcuit electrified initially. ? a touch operation with a duration less than 550ms could regulate the on-off state of the light. one touch operation turns the light on and one more operation turns it off. there are no lightness buffer when led switches bet ween on and off state, and the initial lightness is permanently half of the max lightness.
sigma reserve the right to modi fy the document without notice. page 4 of 9 SGL8022W single-channel dc led control touch chip ? a long-playing touch operation with a dur ation more than 550ms could regulate the lightness on a continuous range. a long-playing touch opr ation make the lightness increase continuously and when the touch operation ends the lightness is on the current level. one more long-playing touch oper ation will make the lightness decrease continuously and when the touch opr ation ends the lightness is also on the current level. if the duration of the touch operation is more than 3s, the lightness will be lowest. ? at any time, users could switch betw een common touch operation and long-playing touch operation, and either function w ill not be influence by one another. ? the function that regulate li ghtness of led continuously with out lightness-memory is based on the first workng mode. when a touch operation switches t he on-off state of led, the lightness will be regulated gradually to the co rresponding level, whic h brings about a vision protecting effect on users. ? the function that regulate light ness continuously with lightness- memory is realized by adding lightness-memory function based on the second function. in ot her words, on condition that the 220vac not being cut off, the lightness leve l when led being turned off is memoried, which will be set as the initial lightness when nex t touch operation turni ng on the led. if 220v ac is cut off, the initial lightness will be half of the maximum when the led is reelectrified. ? the function that regul ate led on a three-secti ons mode is as follows: ? light hold off state when the ci rcuit electrified initially. ? each touch operation will regul ate the lightness orderly as low -> middle -> high rule.
sigma reserve the right to modi fy the document without notice. page 5 of 9 SGL8022W single-channel dc led control touch chip 3. packaging and pin assignment dip8 sop8 pin number pin name input/output functional specification 1 osc input rosc access 2 vc input sampling capacitor access 3 vdd source positive electrical source 4 gnd source negative electrical source 5 ti input touch input 6 opt1 input functi onal option input 1 7 so output control output 8 opt2 output functi onal option input 2
sigma reserve the right to modi fy the document without notice. page 6 of 9 SGL8022W single-channel dc led control touch chip 4. packaging information dip8 sop8
sigma reserve the right to modi fy the document without notice. page 7 of 9 SGL8022W single-channel dc led control touch chip 5. application circuit figure 1. graph of applied circuit with dry battery or regulartor as the power supply figure 2. graph of applied circuit with rechargeable battery as the power supply figure 3. graph of applied circuit with switching source as the power supply
sigma reserve the right to modi fy the document without notice. page 8 of 9 SGL8022W single-channel dc led control touch chip attention: the touching sensitivity could be regul ated by modifying the value of c3 (the sampling capacitor between vc and gnd) when the diff erence between practical medium material and medium in the form. c3 (sampling capacitor between vc and gnd) medium types capacitor types capacitance metallic shell 472 terylene capacitor 0.033uf/25v 3mm arcrylic glass 222 terylene capacitor 0.01uf/25v 3-6mm arcrylic glass 472 terylene capacitor 0.02uf/25v 6-10mm arcrylic glass 103 terylene capacitor 0.047uf/25v 6. electrical characteristics parameter name typical value unit work voltage 3.3v v work current 400 ua standby current 12 ua input (high level) (2/3)vdd v input (low level) (1/3)vdd v output (high level) 5 ma output (low level) 9 ma work temperature -20~70 work voltage -50~100
sigma reserve the right to modi fy the document without notice. page 9 of 9 SGL8022W single-channel dc led control touch chip 7. bom table device symbol device name device value r1 carbon film resistor 47k ? /0.25w r2 carbon film resistor 1k ? /0.25w r3 carbon film resistor 100 ? /0.5w r4 carbon film resistor 20 ? /1w r5 carbon film resistor 5.1 ? /0.5w c1 electrolytic capacitor 10uf/25v c2 ceramic capacitor 0.1uf/25v c3 ceramic capacitor 0.01uf/25v c4 electrolytic capacitor 10uf/25v c5 ceramic capacitor 1uf/400v q1 npn transistor 8050 d1 zener diode 5.1v/1w u1 ldo 3.3v dm led led
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