1 of 6 qualcomm ? quick charge tm 2.0 and 3.0 are products of qualcomm technologies, inc. 1 description the IW1791 is a high performance ac/dc power supply controller for rapid charge applications that supports high resolution voltage/current control. it uses dialogs primaccurate tm technology to minimize external component count and simplify system design. the device operates in quasi-resonant mode to provide high effciency and it also provides a number of key built-in protection features. the IW1791 can achieve tight multi-level constant voltage and multi-level constant current regulation without a traditional secondary feedback circuit. it also eliminates the need for loop compensation components while maintaining stability over all operating conditions. the IW1791 is optimized to work with dialogs secondary-side controllers that use the proprietary digital link (dlnk) technology. the IW1791 and dlnk-based secondary-side controller chipset together can implement various rapid charge protocols, such as usb power delivery (usb pd), qualcomm ? quick charge? 2.0 and 3.0 (qc2.0 and qc3.0) technologies, etc. to achieve fast and smooth voltage transitions upon request by mobile devices (md). the IW1791 and compatible secondary-side controller from dialog use the dlnk communction protocol for output voltage requests, output current limits, output voltage undershoot and over voltage information from the secondary to the primary. in addition, the IW1791 uses source charging technology to charge up v cc before startup, which eliminates the external active start-up (asu) circuit and still can achieve < 20mw no-load power consumption at typical 5v output setting. dialogs innovative proprietary technology ensures that power supplies designed with the IW1791 and dialogs secondary-side controllers can provide output voltage confgurations of 3v to 20v for usb pd, 5v/9v/12v for qc2.0 and 3.6v to 12v in 200mv increments for qc3.0 and other proprietary protocols. 2 features supports 10mv dlnk voltage step request required by usb pd programmable power supply (pps) and other proprietary rapid charge protocols source charging v cc technology eliminates the active start-up (asu) and maintain ultra-low no-load power consumption (< 20mw) at 230v ac with typical 5v output setting high v cc pin voltage rating eliminates external v cc ldo tight multi-level constant-voltage and multi-level constant-current regulation with primary-side feedback and control proprietary optimized load adaptive maximum constant frequency pwm switching with quasi-resonant operation achieves best size, effciency, and common mode noise backward compatible with qc2.0/3.0 and other proprietary rapid charge protocols with secondary-side interface circuits multi-mode pwm/pfm control improves effciency at various load conditions no audible noise over entire operating range user-confgurable 4-level cable drop compensation independent of output voltage proprietary secondary-to-primary digital communication with single optocoupler for all the rapid charge information: x output voltage request x output current limit x output voltage undershoot detection for fast dynamic load response x over-voltage protection ez-emi ? design enhances manufacturability built-in single-point fault protections against output short-circuit including soft short and half short, output over-voltage, and output over-current smartdefender+ tm control technology addresses issues of soft shorts in cables and connectors by effectively reducing the average output power at fault conditions without latch 3 applications rapid-charging ac/dc adapters for smart phones, tablets and other portable devices. IW1791 ac/dc primary-side rapid charge tm pwm controller with high resolution voltage/current control rev. 1.2 product summary ? 2018 dialog semiconductor www.dialog-semiconductor.com 11-jan-2018
2 of 6 figure 3.1 : IW1791 typical application circuit for standard usb pd with optional qc2.0/qc3.0 enabled (using iw656 as secondary-side controller for usb pd and iw676 as synchronous rectifer controller .) l n u1 IW1791 1 2 3 8 7 6 4 5 v sense gnd cfg dlnk source i sense gate v cc + r1 r2 cc2 cc1 v bus gnd v in v cc 1 2 3 6 5 4 + gnd u3 iw676 drain source out u2 iw656 1 2 12 11 3 10 dis drv v cc gnd d- d+ 4 5 6 9 8 7 sd v bus v bus_g cc2 det cc1 + + - + d+ d- usb type-c socket IW1791 ac/dc primary-side rapid charge tm pwm controller with high resolution voltage/current control rev. 1.2 product summary ? 2018 dialog semiconductor www.dialog-semiconductor.com 11-jan-2018
3 of 6 4 pinout description pin number pin name type pin description 1 gnd ground ground. 2 dlnk analog input digital communication link signal. used for secondary-side to primary-side communication for all rapid change information, which includes output voltage requests, output current limits, output voltage undershoot, and over-voltage protection. 3 v sense analog input auxiliary voltage sense. used for primary-side regulation and secondary-to-pri - mary communication through main transformer. 4 cfg analog input used for cdc confguration and auxiliary winding open protection. 5 i sense analog input primary-side current sense. used for cycle-by-cycle peak-current control and limit in primary-side cv/cc regulation. 6 source power input connect to the source of external power mosfet. inside the ic, it is connect - ed to internal mosfet and startup v cc charge circuit. 7 gate output gate drive for external mosfet switch. 8 v cc power input ic power supply. 11 1 2 8 figure 4.1 : 8-lead soic-8 package IW1791 ac/dc primary-side rapid charge tm pwm controller with high resolution voltage/current control rev. 1.2 product summary ? 2018 dialog semiconductor www.dialog-semiconductor.com 11-jan-2018
4 of 6 parameter symbol value units dc supply voltage range (pin 1, i cc = 20ma max) v cc -0.3 to 45.0 v continuous dc supply current at v cc pin (v cc = 15v) i cc 20 ma v sense input (pin 3, i v sense 10ma) -0.7 to 10.0 v cfg (pin 4) -0.7 to 5.0 v dlnk (pin 2) -0.3 to 5.5 v i sense input (pin 5) -0.7 to 5.0 v source input (pin 6) -0.7 to 25.0 v gate (pin 7) -0.3 to 30 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 jesd78d 100 ma absolute maximum ratings are the parameter values or ranges which can cause permanent damage if exceeded. for maximum safe operating conditions, refer to the electrical characteristics section. 5 absolute maximum ratings IW1791 ac/dc primary-side rapid charge tm pwm controller with high resolution voltage/current control rev. 1.2 product summary ? 2018 dialog semiconductor www.dialog-semiconductor.com 11-jan-2018
5 of 6 6 physical dimensions 7 ordering information part number options package description protocol supported default k cc at start-up cc shutdown voltage ovp/ otp latch cc shutdown latch supported dlnk voltage information resolution IW1791-00 usb pd/qc 0.422 66% for all v bus except 6.5v for v bus = 9v no no 25mv/step soic-8 tape & reel 1 IW1791-01 usb pd/qc 0.422 2.9v for v bus 12v 3.2v for v bus > 12v no no 25mv/step soic-8 tape & reel 1 IW1791-02 usb pd/qc 0.422 2.9v for v bus 12v 3.2v for v bus > 12v no no 10mv/step soic-8 tape & reel 1 IW1791-22 usb pd/qc 0.422 2.9v for v bus 12v 3.2v for v bus > 12v yes no 10mv/step soic-8 tape & reel 1 IW1791-23 usb pd/qc 0.422 2.9v for v bus < 3.4v; 3.0v for 3.4v v bus < 9v; 6.5v for 9v v bus < 1 2 v ; 10v for v bus 12v yes no 10mv/step soic-8 tape & reel 1 note 1: tape & reel packing quantity is 2,500/reel. minimum packing quantity is 2,500. IW1791 ac/dc primary-side rapid charge tm pwm controller with high resolution voltage/current control rev. 1.2 product summary ? 2018 dialog semiconductor www.dialog-semiconductor.com 11-jan-2018
6 of 6 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 , available on the company website ( www.dialog-semiconductor.com ) unless otherwise stated. dialog and the dialog logo are 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. ? 2018 dialog semiconductor. all rights reserved. rohs compliance dialog semiconductors suppliers certify that its products are in compliance with the requirements of directive 2011/65/eu of the european parliament on the restriction of the use of certain hazardous substances in electrical and electronic equipment. rohs certifcates from our suppliers are available on request. IW1791 ac/dc primary-side rapid charge tm pwm controller with high resolution voltage/current control rev. 1.2 product summary ? 2018 dialog semiconductor www.dialog-semiconductor.com 11-jan-2018 contacting dialog semiconductor united kingdom (headquarters) 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 8822 email info_pcbg@diasemi.com north america dialog semiconductor inc. phone: +1 408 845 8500 japan dialog semiconductor k. k. phone: +81 3 5769 5100 taiwan dialog semiconductor taiwan phone: +886 281 786 222 web site: www.dialog-semiconductor.com hong kong dialog semiconductor hong kong phone: +852 2607 4271 korea dialog semiconductor korea phone: +82 2 3469 8200 china (shenzhen) dialog semiconductor china phone: +86 755 2981 3669 china (shanghai) dialog semiconductor china phone: +86 21 5424 9058
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