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w s3410 productdescription winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics c o p y r igh t @ w i n s em i microelectronics c o . , lt d . , a l l ri g h t r e s er v ed 1030 features ? active pfc for high power factor and low thd ? critical conduction mode operation ? system efficiency up to 95% ? without auxiliary winding ? excellent lin e and load regulation ? 3% led output current accuracy ? thermal regulation function ? led short/open protection ? current sensing resistor open protection ? auto fault recovery ? available in so t23-6 package applications ? e27 led bulb, spot light ? par30, par38 lamp ? t8/t10 led string ? other led lighting description the WS3410 is a high precision non-isolated buck driver with active pfc, specially designed for universal input offline constant current led lighting. the driver with on-chip pfc circuit achieves high power factor and low thd. operating in critical conduction mode, the power mosfet switching loss is reduced and the inductor is fully utilized . with few external components, the led output current can be precisely controlled. the WS3410 offers rich protection functions to improve the system reliability, including led open circuit protection, led short circuit protection, cs resistor open circuit protection and cycle by cycle current limit. all the protection functions are auto-recovery. the system reliability is further improved by the thermal regulation function . the output current is reduced when the driver is over temperature. the WS3410 has u ltra low star t up current and u ltra l ow o perating c urrent . the WS3410 is a vailable in sot23-6 package typical application non-isolated buck apfc offline led driver
www.winsemi.com tel : +86-755-8250 6288 fax : +86-755-8250 6299 2 / 8 w s3410 productdescription winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics pin configuration and marking information the WS3410 is a vailable in sot23-6 package the top marking is shown as below: pin definition name pin no. description vcc 1 power supply p in. connect a bypass capacitor from this pin to gnd. gnd 2 ground . comp 3 loop compensation node. this pin connects a capacitor to gnd for stabilization of the control loop, achieving accurate led current, high power factor and low thd. gate 4 gate driver p in . connect this pin to the gate of external power mosfet. cs 5 current sense p in. c onnect a resistor to gnd to sense the inductor current. fb 6 feedback voltage input p in. this pin detects the inductor demagnetization signal and the output voltage. internal block diagram 3410 product code x product code ym production date xx internal code for qc www.winsemi.com tel : +86-755-8250 6288 fax : +86-755-8250 6299 3 / 8 w s3410 productdescription winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics ordering information package marking part number 6 -pin sot23-6 , pb-free ws 3410yp ws 3410yp recommended operation conditions part number package input voltage maximum output power ws 3410yp sot23-6 175vac-264vac 120v/ 45 0ma 90vac-264vac 80v/ 45 0ma absolute maximum ratings symbol paramete range unit v cc vcc pin voltage -0.3~8 v v gate gate driver pin voltage -0.3~ 8 v v cs current sense pin input voltage -0.3~7 v v fb feedback pin input voltage -0.3~7 v v comp compensation pin voltage -0.3~7 v p dmax power dissipation 0. 2 w t j operating junction temperature 1 65 t stg storage temperature range -55~1 65 note : stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. www.winsemi.com tel : +86-755-8250 6288 fax : +86-755-8250 6299 4 / 8 w s3410 productdescription winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics electrical characteristics (unless otherwise specified, vcc=8v and ta =25 ) symbol parameter conditions min typ max units supply voltage section v cc_clamp vcc clamp voltage 7. 5 8. 0 8.5 v i cc_clamp vcc clamp current 5 ma v cc_st vcc turn on threshold vcc rising 7.07 7.57 8.07 v v uvlo_hys vcc turn off hysteresis vcc falling 1. 32 v i st vcc startup current vcc www.winsemi.com tel : +86-755-8250 6288 fax : +86-755-8250 6299 6 / 8 winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics w s3410 productdescription bypass capacitor the bypass capacitor on vcc pin should be as close as possible to the vcc and gnd pins. ground path the power ground path for current sense resistor should be short and wide, and it should be as close as possible to the ic ground (pin 2 ) , otherwise the led output current accuracy maybe affected . the ic signal ground for comp and fb components should be connected to the ic gnd pin with short traces and should be away from the power ground path. the area of power loop the area of main current loop should be as small as possible to reduce emi radiation. fb pin the feedback resistor divider should be as close as possible to the fb pin , and the trace must keep s away from dynamic node of the inductor (drain pin trace the positive pin and th e negative pin of vo trace) , otherwise the fb pin ovp function might have risk to be mis-triggered by the system noise. d rain pin to i ncrease the copper area of drain pin for better thermal dissipation. however, too large copper area may compromise emi performance. t he material of pcb avoid choosing the material that is easy to absor b the moisture , just like paper copper-clad laminates . www.winsemi.com tel : +86-755-8250 6288 fax : +86-755-8250 6299 7 / 8 winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics w s3410 productdescription package information sot23-6 package outline dimensions winsemi symbol dimensions in millimeters dimensions in inches min max min max a 2.72 3.12 0.107 0.123 b 1.40 1.80 0.055 0.071 c 1.00 1.20 0.039 0.047 a1 0.90 1.00 0.035 0.039 a2 0.30 0.50 0.012 0.020 b1 2.60 3.00 0.102 0.118 b2 0.119 0.135 0.005 0.005 c1 0.03 0.15 0.001 0.006 c2 0.55 0.75 0.022 0.030 d 0.03 0.13 0.001 0.005 d1 0.30 0.60 0.012 0.024 d2 0.25typ 0.01typ d3 0.60 0.70 0.024 0.028 a a1 a2 b 1 b b2 c2 r c c 1 d r1 r2 d1 d3 d 2 2 3 1 unit:mm www.winsemi.com tel : +86-755-8250 6288 fax : +86-755-8250 6299 8 / 8 winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics winsemi microelectronics w s3410 productdescription n ote: 1. we strongly recommend customers check carefully on the trademark when buying our product, if there is any question, please don't be hesitate to contact us. 2. please do not exceed the absolute maximum ratings of the device when circuit designing. 3. winsemi microelectronics co., ltd reserved the right to make changes in this specification sheet and is subject to change without prior notice. contact: winsemi microelectronics co., ltd. add:futian district, shenzhen tian an cyber tech plaza two east wing 1002 post code : 518040 tel : +86-755-8250 6288 fax : +86-755-8250 6299 web site : www.winsemi.com |
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