1 of 5 1.0 features all-in-one non-dimmable low-cost off-line led driver (isolated and non-isolated applications) supports universal input voltage range (90 v ac to 277 v ac ) and output power up to 20w high power factor (pf) with low current-ripple control technology user-confgurable power factor setting (>0.7 to >0.9) user-confgurable over-temperature protection (otp) with temperature-current derating very tight led current regulation ( 5%) across line and load, and within primary inductance tolerance ( 20%) isolated design without opto-coupler supports wide range of led numbers with tight current regulation stabilized led current-ripple control without visible shimmer or ficker active start-up scheme enables fastest possible start-up 72khz maximum pwm switching frequency with quasi- resonant operation dynamic base current control to drive low-cost bjt ez-emi ? design enhances manufacturability built-in single-point fault protection features: led open-/ short-circuit protection and over-current protection no audible noise over entire operating range 2.0 description the IW3628 is a high performance, single-stage ac/dc power controller for led luminaires with power factor (pf) correction. the device uses digital control technology to build unique hybrid mode control in pwm fyback power supplies to achieve high power factor meanwhile minimizing led current ripple. this distinctive control approach enables the capability for users to make trade-offs between pf and led current ripple in a single-stage design. it can achieve excellent led current regulation over line and load variation, without the need for secondary feedback circuit. the built-in temperature sensor along with control logic can automatically adjust output current in real-time without visible ficker during the process. the IW3628 operates in quasi-resonant mode to provide high effciency along with a number of key built-in protection features while minimizing the external component count, simplifying emi design, and lowering the total bill of material cost. it also eliminates the need for loop compensation components while maintaining stability over all operating conditions. the built-in power limit function enables optimized transformer design in universal off-line applications with input voltage from 90 v ac to 277 v ac . dialogs innovative proprietary technology maximizes the IW3628 performance in a thermal-enhanced soic-8 package. the IW3628 offers two multi-function pins allowing users to confgure pf and otp as required with no cost or size impact, thereby providing design fexibility. the active start- up scheme enables the shortest possible start-up time without sacrifcing active effciency. 3.0 applications solid-state led lighting led lighting ballast figure 3.1: IW3628 typical application circuit (non-isolated application) l n v out- + v out+ u1 IW3628 cs/pf 4 7 1 8 6 5 2 3 + output gnd gnd asu fb/otp gnd v cc IW3628 product summary off-line digital power controller for led driver with high power factor and low-ripple current rev. 1.1 IW3628 ? 2014 dialog semiconductor (uk) ltd. product summary
2 of 5 figure 3.2: IW3628 typical application circuit (isolated application) v out gnd + l u1 IW3628 cs/pf 4 7 1 8 6 5 2 3 n + output gnd gnd asu fb/otp gnd v cc v out gnd + l u1 IW3628 cs/pf 4 7 1 8 6 5 2 3 n + output gnd gnd asu fb/otp gnd v cc figure 3.3: IW3628 typical application circuit (isolated application without using active start-up device ) IW3628 product summary off-line digital power controller for led driver with high power factor and low-ripple current rev. 1.1 IW3628 ? 2014 dialog semiconductor (uk) ltd. product summary
3 of 5 parameter symbol value units dc supply voltage range (pin 8, i cc = 20ma max) v cc -0.3 to 18.0 v continuous dc supply current at v cc pin (v cc = 15v) i cc 20 ma asu output (pin 7) -0.3 to 18.0 v output (pin 4) -0.3 to 4.0 v fb/otp input (pin 6, i fb/otp 10ma) -0.7 to 4.0 v cs/pf input (pin 5) -0.3 to 4.0 v maximum junction temperature t jmax 150 c operating junction temperature t jopt -40 to 150 c storage temperature t stg -65 to 150 c thermal resistance junction-to-ambient ja 155 c/w esd rating per jedec jesd22-a114 2,000 v latch-up test per jesd78a 100 ma absolute maximum ratings are the parameter values or ranges which can cause permanent damage if exceeded. 4.0 pinout description 5.0 absolute maximum ratings pin # name type pin description 1 gnd ground ground. 2 gnd ground ground. 3 gnd ground ground. 4 output output base drive for bjt. 5 cs/pf analog input multi-function pin. used for pf confguration at the beginning of start- up and to provide primary current sense for cycle-by-cycle peak current control and limit during normal operation. 6 fb/otp analog input multi-function pin. used for otp current derating confguration at the beginning of start-up and to provide auxiliary voltage sense for primary regulation during normal operation. 7 asu output control signal for active start-up device (bjt or depletion mode nfet). 8 v cc power input power supply for control logic and bjt drive. IW3628 gnd gnd gnd asu fb/otp 1 2 3 8 6 7 4 5 output v cc cs/pf figure 4.1: 8-lead soic-8 package IW3628 product summary off-line digital power controller for led driver with high power factor and low-ripple current rev. 1.1 IW3628 ? 2014 dialog semiconductor (uk) ltd. product summary
4 of 5 6.0 physical dimensions 7.0 ordering information compliant to jedec standard ms12f controlling dimensions are in inches; millimeter dimensions are for reference only this product is rohs compliant and halide free. soldering temperature resistance: [a] package is ipc/jedec std 020d moisture sensitivity level 1 [b] package exceeds jedec std no. 22-a111 for solder immersion resistance; package can withstand 10 s immersion < 260?c dimension d does not include mold flash, protrusions or gate burrs. mold flash, protrusions or gate burrs shall not exceed 0.15 mm per end. dimension e1 does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.25 mm per side. the package top may be smaller than the package bottom. dimensions d and e1 are determined at the outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and interlead flash, but including any mismatch between the top and bottom of the plastic body. 8-lead small outline (soic) package coplanarity 0.10 (0.004) 8 5 4 1 seating plane a1 e h b d e a a2 c l h x 45 inches symbol millimeters min 0.0040 a1 max min max 0.010 0.10 0.25 0.053 a 0.069 1.35 1.75 0.014 b 0.019 0.35 0.49 0.007 c 0.010 0.19 0.25 0.189 d 0.197 4.80 5.00 0.150 e 0.157 3.80 4.00 0.050 bsc e 1.27 bsc 0.228 h 0.244 5.80 6.20 0.10 h 0.020 0.25 0.50 0.016 l 0.049 0.4 1.25 0 8 0.049 a2 0.059 1.25 1.50 part number options package description i w 3628 - 0 0 maximum driver current = 60ma soic-8 tape & reel 1 note 1: tape & reel packing quantity is 2,500/reel. minimum ordering quantity is 2,500. IW3628 product summary off-line digital power controller for led driver with high power factor and low-ripple current rev. 1.1 IW3628 ? 2014 dialog semiconductor (uk) ltd. product summary
disclaimer information in this document is believed to be accurate and reliable. however, dialog semiconductor does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information. dialog semiconductor furthermore takes no responsibility whatsoever for the content in this document if provided by any information source outside of dialog semiconductor . dialog semiconductor reserves the right to change without notice the information published in this document, including without limitation the specifcation and the design of the related semiconductor products, software and applications. applications, software, and semiconductor products described in this document are for illustrative purposes only. dialog semiconductor makes no representation or warranty that such applications, software and semiconductor products will be suitable for the specifed use without further testing or modifcation. unless otherwise agreed in writing, such testing or modifcation is the sole responsibility of the customer and dialog semiconductor excludes all liability in this respect. customer notes that nothing in this document may be construed as a license for customer to use the dialog semiconductor products, software and applications referred to in this document. such license must be separately sought by customer with dialog semiconductor . all use of dialog semiconductor products, software and applications referred to in this document are subject to dialog semiconductors standard terms and conditions of sale , unless otherwise stated. ? dialog semiconductor (uk) ltd. all rights reserved. rohs compliance dialog semiconductor complies to european directive 2001/95/ec and from 2 january 2013 onwards to european directive 2011/65/eu concerning restriction of hazardous substances (rohs/rohs2). dialog semiconductors statement on rohs can be found on the customer portal https://support.diasemi.com/ . rohs certifcates from our suppliers are available on request. 5 of 5 contacting dialog semiconductor united kingdom dialog semiconductor (uk) ltd phone: +44 1793 757700 germany dialog semiconductor gmbh phone: +49 7021 805-0 the netherlands dialog semiconductor b.v. phone: +31 73 640 88 22 email info_pcbg@diasemi.com north america dialog semiconductor inc. phone: +1 408 845 8500 japan dialog semiconductor k. k. phone: +81 3 5425 4567 taiwan dialog semiconductor taiwan phone: +886 8178 6222 web site: www.dialog-semiconductor.com singapore dialog semiconductor singapore phone: +65 64849929 hong kong dialog semiconductor hong kong phone: +852 2607 4271 korea dialog semiconductor korea phone: +82 2 3469 8200 china dialog semiconductor (shenzhen) phone: +86 755 2981 3669 dialog semiconductor (shanghai) phone: +86 21 5178 2561 IW3628 product summary off-line digital power controller for led driver with high power factor and low-ripple current rev. 1.1 IW3628 ? 2014 dialog semiconductor (uk) ltd. product summary
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