1 of 6 1 description the IW673 is a high performance synchronous rectifer controller with an integrated mosfet driver for fyback converters operating at discontinuous conduction mode. combined with the mosfet, the IW673 can emulate the diode rectifer at the secondary side of the fyback to reduce conducti on loss. the IW673 determines the timing of the driver by sensing the voltage across the r ds(on) to achieve lossless sensing. the IW673 uses proprietary digital adaptive turn- off control technology to minimize the turn-off deadtime of the synchronous rectifer so that the parallel schottky diode required by conventional synchronous rectifers can be eliminate d. the integrated driver has strong driving capability for high effciency. the operating power consumption of the controller excluding the driver is less than 4mw at no load to achieve the ultra-low no-load power consumption at 5v output. the IW673 integrates a pulse linear regulator to maintain the operation of the synchronous rectifer at low system output voltage when the system is operating in constant current (cc) mode. 2 features digital adaptive turn-off control minimizes dead-time and eliminates the parallel schottky diode integrated pulse linear regulator (plr) enables sr operation at down to 2.4v system output when system is in constant current (cc) mode with IW673-00, IW673-01, or IW673-20 wide v in pin operating voltage up to 25v (16v for IW673-00) 3 applications compact ac/dc adapters/chargers for media tablets and smart phones figure 3.1 : IW673 typical application circuit optimized 5v mosfet gate driver intelligent low power management achieves ultra-low no-load operating current lossless mosfet v ds sensing for sr timing control 6-pin sot23 package v out rtn 1 2 6 5 3 4 + gnd IW673 drain source out v cc v in + IW673 digital green-mode synchronous rectifer controller rev. 1.4 product summary ? 2016 dialog semiconductor www.dialog-semiconductor.com 17-may-2016
2 of 6 figure 3.2 : IW673 typical application circuit using iw1602 as the primary-side controller (achieving <75mw no-load power consumption in 5v, 2.5a adapter designs with fast dynamic load response, and supporting constant current operation down to 2.4v system output) l + u1 iw1602 v cc v sense cfg output gnd cs/fs r fs r isns 1 5 3 6 4 2 n v out rtn + + u2 IW673 drain source out v in v cc gnd 1 5 3 6 4 2 figure 3.3 : IW673 typical application circuit for multi-level output voltage and current (using iw1782 as primary-side controller and iw636 as secondary-side controller) for qualcomm ? quick charge tm 3.0 (achieving <20mw no-load power consumption) note: the dfet clamping circuit at the drain pin of IW673 is not needed if the maximum voltage on the drain of the sr mosfet is lower 60v. + + u1 iw1782 v sense sd v cc gnd 1 2 3 8 7 6 4 5 ntc l n output cs/cdc dlnk asu r cdc v out rtn v in v cc 1 2 3 6 5 4 + + gnd u3 IW673 u2 iw636 3 1 drv gnd 2 4 6 5 dis v cc d- d+ d+ d- drain source out IW673 digital green-mode synchronous rectifer controller rev. 1.4 product summary ? 2016 dialog semiconductor www.dialog-semiconductor.com 17-may-2016
3 of 6 4 pinout description pin no. pin name type pin description 1 drain analog input synchronous rectifer mosfet drain voltage sensing and the pulse linear regulator (plr) input. 2 source analog input synchrnous rectifer mosfet source voltage sensing input. 3 out output synchronous rectifer mosfet driver. 4 gnd ground ground. 5 v cc power input output of internal ldo and plr. it provides bias voltage for the internal logic circuit and the mosfet driver. connect this pin to a capacitor. 6 v in analog input input of internal ldo and system output voltage sensing circuit. connect to adapter/charger output for bias voltage. the internal ldo clamps the v cc voltage at 5v when v in > 5v. the v in is also the input for the plr enable comparator and the sr enable comparator. figure 4.1 : 6-pin sot23 package IW673 drain source out v in v cc gnd 1 2 3 6 4 5 IW673 digital green-mode synchronous rectifer controller rev. 1.4 product summary ? 2016 dialog semiconductor www.dialog-semiconductor.com 17-may-2016
4 of 6 absolute maximum ratings are the parameter values or ranges which can cause permanent damage if exceeded. 5 absolute maximum ratings parameter symbol value units v in dc supply voltage range (pin 6, i cc = 15ma max) v in -0.3 to 33 v continuous dc supply current at v in pin (v in = 30v) i vo 15 ma continuous dc supply current at v cc pin (v cc = 5.5v) i vcc 15 ma gate peak output current i g 3 a drain pin voltage (note 1) v d -1.5 to 60 v drain pin peak current i drain -40 to 300 ma source pin voltage v source - 0.6 to 1 v v cc pin voltage v cc -0.6 to 6 v junction temperature t j -40 to 150 c storage temperature C65 to 150 c thermal resistance junction-to-ambient ja 190 c/w esd rating per jedec jesd22-a114 2,000 v notes: note 1: the drain pin voltage should not be below -0.6v for more than 500 ns. IW673 digital green-mode synchronous rectifer controller rev. 1.4 product summary ? 2016 dialog semiconductor www.dialog-semiconductor.com 17-may-2016
5 of 6 6 physical dimensions 7 ordering information 1 3 4 6 5 2 6-lead sot package d compliant to jedec standard mo-178ab controlling dimensions are in millimeters this package 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; packages can withstand 10 s immersion < 260oc dimension d does not include mold flash, protrusions or gate burrs. mold flash, protrusions or gate burrs shall not exceed 0.25 mm per side. the package top may be smaller than the package bottom. dimensions d and e1 are are determined at the outermost extremes of the plastic body exclusive of mold flash, tie bar burrs and interlead flash, but including any mismatch between top and bottom of the plastic body. seating plane a1 coplanarity 0.10 e1 b e e1 a a2 c l symbol millimeters a1 min max 0.00 0.15 a 0.90 1.45 b 0.30 0.50 c 0.09 0.20 d 2.80 3.00 e e1 e 0.95 bsc e1 1.90 bsc l 0.30 0.55 0 8 a2 0.90 1.30 e 2.90 3.00 2.80 2.60 3.00 1.50 1.75 part no. options package description IW673-00 v out < 16v. i out < 4a. not recommended for new designs sot23 tape & reel 1 IW673-01 v out < 25v. i out > 4a or when sr mosfet with large package inductance (to-220 or similar) is used. sot23 tape & reel 1 IW673-10 v out < 25v. i out < 4a. plr circuit is disabled until uvlo once v out reaches plr disable threshold (v lr_disable ). sot23 tape & reel 1 IW673-20 v out < 25v. i out < 4a. sot23 tape & reel 1 note 1: tape and reel packing quantity is 3,000/reel. minimum ordering quantity is 3,000. IW673 digital green-mode synchronous rectifer controller rev. 1.4 product summary ? 2016 dialog semiconductor www.dialog-semiconductor.com 17-may-2016
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. 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 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 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 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 , available on the company website ( www.dialog-semiconductor.com ) unless otherwise stated. dialog and the dialog logo trademarks of dialog semiconductor plc or its subsidiaries. all other product or service names are the property of their respective owners. qualcomm is a trademark of qualcomm incorporated, registered in the united states and other countries. qualcomm quick charge is a trademark of qualcomm incorporated. all qualcomm incorporated marks are used with permission. ? copyright 2016 dialog semiconductor. all rights reserved. rohs compliance dialog semiconductor complies to european directive 2001/95/ec and from 2 january 2013 onwards to european directive 201 1/65/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. 6 of 6 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: +886 281 786 222 web site: www.dialog-semiconductor.com singapore dialog semiconductor singapore phone: +65 648 499 29 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 5424 9058 IW673 digital green-mode synchronous rectifer controller rev. 1.4 product summary ? 2016 dialog semiconductor www.dialog-semiconductor.com 17-may-2016
|
