1 of 6 1.0 features highest effciency and ultra-low no-load power consumption with secondary-side synchronous rectifcation ( > 88% full-load effciency at 230v ac in typical 5v2.4a power supplies with < 15mw no-load power consumption) fast dynamic load response (dlr) with secondary-side load transient detection tight constant-voltage and constant-current regulation across line and load range with primary-side feedback and control intelligent low power management achieves ultra-low operating current (~250a) at no-load proprietary optimized 89khz maximum constant frequency pwm switching with quasi-resonant operation achieves best size, effciency, and common mode noise user-confgurable 5-level cable drop compensation ez-emi ? design enhances manufacturability adaptive multi-mode pwm/pfm control improves effciency built-in single-point fault protection against output short-circuit, output over-voltage, and output over- current user-confgurable external shutdown control on-chip internal over-temperature protection no audible noise over entire operating range 2.0 description the IW1766C1 is a high performance ac/dc power supply controller which uses digital control technology to build peak-current mode pwm fyback power supplies. the device 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 the emi design, and lowering the total bill of material cost. the IW1766C1 can achieve tight constant voltage and tight constant current regulation without traditional secondary- feedback circuit. it also eliminates the need for loop compensation components while maintaining stability over all operating conditions. the IW1766C1 is optimized to work with dialogs iw671 digital synchronous rectifer to reduce power supply output ripple and achieve the highest average active effciency and less than 15mw no-load power consumption in a typical 5v2.4a power supply. the iw671 integrates an adaptive voltage position monitor to detect the fyback converter output voltage undershoot, enabling ultra-fast dynamic load response (dlr) for faster recovery from standby. the 10mw no-load consumption can be achieved if it is a paired iw628. 3.0 applications high power density ac/dc adapter/chargers for media tablets and smart phones ac/dc adapters for consumer electronics optimized for universal input ac/dc adapters (10 C 15w) + + u1 IW1766C1 v sense sd v cc gnd 1 2 3 8 7 6 4 5 ntc l n output cs/cdc det asu r cdc v out rtn vps drv v in v cc 1 2 3 8 7 6 4 5 plrin drain + + gnd out u2 iw671 figure 3.1: IW1766C1 typical application circuit (using iw671 as secondary-side synchronous rectifcation and load transient detection device) (achieving < 15mw no-load power consumption in ultra-compact 5v2.4a adapter designs with fast dynamic load response) IW1766C1 product summary ultra-low no-load power digital quasi-resonant pwm controller rev. 0.2 preliminary IW1766C1 ? 2015 dialog semiconductor (uk) ltd. product summary
2 of 6 u2 iw628 v out rtn + + + u1 IW1766C1 v sense sd v cc gnd 1 2 3 8 7 6 4 5 ntc l n output cs/cdc det asu r cdc 2 1 3 vps drv gnd figure 3.2: IW1766C1 typical application circuit (using iw628 as secondary-side load transient detection device) (achieving < 10mw no-load power consumption in typical 5v2a adapter designs with fast dynamic load response) v out rtn + + + u1 IW1766C1 v sense sd det asu v cc gnd output cs/cdc 1 2 3 8 7 6 4 5 ntc l n r cdc figure 3.3: IW1766C1 typical application circuit IW1766C1 product summary ultra-low no-load power digital quasi-resonant pwm controller rev. 0.2 preliminary IW1766C1 ? 2015 dialog semiconductor (uk) ltd. product summary
3 of 6 4.0 pinout description pin # name type pin description 1 v sense analog input auxiliary voltage sense. used for primary-side regulation. 2 sd analog input external shutdown control. can be confgured for external over- temperature protection (otp) by connecting an ntc resistor from this pin to ground. 3 det analog input detection signal. used for secondary-side under-voltage detection. 4 asu output control signal. used for active start-up device (bjt or depletion mode n-fet). 5 cs/cdc analog input primary-side current sense and external cable drop compensation (cdc). used for cycle-by-cycle peak-current control and limit in primary-side cv/ cc regulation. also used for cdc confguration. 6 output output gate drive for external mosfet switch. 7 gnd ground ground. 8 v cc power input ic power supply. IW1766C1 v sense sd det asu v cc gnd output cs/cdc 1 2 3 8 7 6 4 5 figure 4.1: 8 lead soic-8 package IW1766C1 product summary ultra-low no-load power digital quasi-resonant pwm controller rev. 0.2 preliminary IW1766C1 ? 2015 dialog semiconductor (uk) ltd. product summary
4 of 6 parameter symbol value units dc supply voltage range (pin 8, i cc = 20ma max) v cc -0.3 to 25.0 v continuous dc supply current at v cc pin (v cc = 15v) i cc 20 ma asu output (pin 4) -0.3 to 19.0 v output (pin 6) -0.3 to 20.0 v v sense input (pin 1, i vsense 10ma) -0.7 to 4.0 v cs/cdc input (pin 5) -0.3 to 4.0 v sd (pin 2) -0.3 to 4.0 v det (pin 3) -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 160 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. 5.0 absolute maximum ratings IW1766C1 product summary ultra-low no-load power digital quasi-resonant pwm controller rev. 0.2 preliminary IW1766C1 ? 2015 dialog semiconductor (uk) ltd. product summary
5 of 6 6.0 physical dimensions part number options package description IW1766C1-00 no ovp/otp latch, v ipk(low) = 0.23v, 2.5v cc shutdown voltage soic-8 tape & reel 1 note 1: tape & reel packing quantity is 2,500/reel. minimum ordering quantity is 2,500. 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 IW1766C1 product summary ultra-low no-load power digital quasi-resonant pwm controller rev. 0.2 preliminary IW1766C1 ? 2015 dialog semiconductor (uk) ltd. product summary
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