iW3627 Off-Line Digital Constant-Voltage LED Driver with Power Factor Correction 1 Description The iW3627 is a high-performance single-stage AC/DC constant voltage (CV) controller with high power factor correction. It supports most commonly used isolated and non-isolated topologies including flyback, buck-boost, and buck. The device operates in constant on-time mode to achieve high power factor (>0.9) across a wide load range. It can achieve excellent output voltage regulation over line and load variation without the need for a secondary feedback circuit. It also eliminates the need for external loop compensation while maintaining stability over all operating conditions with different types of loads, including downstream DC-DC converter, constant current (CC) load, LED load, and constant resistive (CR) load. The iW3627 integrates a proprietary technique that adaptively adjusts output voltage limits to maintain overshoot and undershoot transients to less than 10% of the nominal output voltage for any load transient. The iW3627 operates in pulse-frequency-modulation (PFM) mode at light load to eliminate audible noise, and at the same time achieving less than 200mW no-load standby power consumption. Dialog’s innovative proprietary technology maximizes the iW3627 performance in a tiny SOT-23 package. The iW3627 provides maximum design flexibility by providing two multi-function pins that allow users to configure maximum and minimum switching frequencies with no cost or size impact. In addition to providing input voltage sensing for input under-voltage protection, the VIN pin also enables the active start-up scheme to achieve the shortest possible start-up time without sacrificing active efficiency. 2 Features ●● All-in-one low-cost off-line high power factor (PF) constant voltage (CV) controller supports flyback, buck-boost, and buck topologies in isolated or nonisolated designs ●● Supports universal AC input (90VAC – 277VAC) and DC input ●● Primary-side control achieves very tight line and load regulation (±3%) ●● Adaptively adjusted output voltage limits accommodating different load conditions ensures <10% overshoot and undershoot for any load transient ●● Enhanced MOSFET driver supports output power up to 90W or above in a tiny SOT-23 package ●● User-configurable maximum PWM switching frequency (90kHz or 120kHz) ●● User-configurable minimum switching frequency (600Hz/1kHz) ensures no-load standby power consumption < 200mW or below ●● Built-in soft-start achieves fast and smooth start-up for all different operating conditions ●● Active start-up scheme enables fastest possible startup ●● Internal loop compensation ensures stable operation with different types of loads: downstream DC-DC converter, constant current (CC) load, LED load, and constant resistive (CR) load ●● Supports wide range of output capacitance (with output voltage ripple ranging from 1% to 20% at full load) ●● Built-in single-point fault protection features: output over-load, output over-voltage, output short and input voltage under-voltage protections ●● Built-in over-temperature protection ●● No audible noise over entire operating range 3 Applications ●● Smart LED lighting ●● LED lighting ballast ●● Front-end pre-regulator Product Summary www.dialog-semiconductor.com Rev. 1.3 1 of 7 28-April-2017 © 2017 Dialog Semiconductor iW3627 Off-Line Digital Constant-Voltage LED Driver with Power Factor Correction L VOUT + RIN N DFET VOUT iW3627 6 OUTPUT VCC 1 5 GND VIN 3 4 CS/FMIN FB/FMAX 2 Figure 3.1 : iW3627 Typical Application Circuit (Isolated Flyback Application) L VOUT + N VOUT iW3627 6 OUTPUT VCC 1 5 GND VIN 3 4 CS/FMIN FB/FMAX 2 Figure 3.2 : iW3627 Typical Application Circuit (Buck Application) Product Summary www.dialog-semiconductor.com Rev. 1.3 2 of 7 28-April-2017 © 2017 Dialog Semiconductor iW3627 Off-Line Digital Constant-Voltage LED Driver with Power Factor Correction L VOUT + N VOUT iW3627 6 OUTPUT VCC 1 5 GND VIN 3 4 CS/ FMIN FB/FMAX 2 Figure 3.3 : iW3627 Typical Application Circuit (Isolated Flyback Application Without Using Active Start-up Device) L N iW3627 6 OUTPUT VCC 1 5 GND VIN 3 4 CS/FMIN FB/FMAX 2 VOUT1+ VOUT2 + VOUT1 VOUT2 MCU or Wireless Module Figure 3.4 : iW3627 Typical Application Circuit (Smart Lighting) Product Summary www.dialog-semiconductor.com Rev. 1.3 3 of 7 28-April-2017 © 2017 Dialog Semiconductor iW3627 Off-Line Digital Constant-Voltage LED Driver with Power Factor Correction 4 Pinout Description iW3627 1 VCC 2 FB/FMAX 3 VIN OUTPUT 6 GND 5 CS/FMIN 4 Figure 4.1 : 6-Lead SOT23 Package Pin Number Pin Name Type Pin Description 1 VCC Power Input Power supply to control logic and MOSFET drive. 2 FB/FMAX Analog Input Multi-function pin. Used to configure maximum switching frequency (FMAX), and to enable/disable over-load protection (OLP) at the beginning of start-up. It also provides output voltage sense for primary regulation during normal operation. 3 VIN Analog Input Multi-function pin. Used to control active start-up device and sense line voltage. 4 CS/FMIN Analog Input Multi-function pin. Used to configure minimum switching frequency (FMIN) at the beginning of the start-up. It also provides primary current sense for cycleby-cycle peak current control and limit during normal operation. 5 GND Ground Ground. 6 OUTPUT Output Gate drive for external MOSFET switch. Product Summary www.dialog-semiconductor.com Rev. 1.3 4 of 7 28-April-2017 © 2017 Dialog Semiconductor iW3627 Off-Line Digital Constant-Voltage LED Driver with Power Factor Correction 5 Absolute Maximum Ratings Absolute maximum ratings are the parameter values or ranges which can cause permanent damage if exceeded. Parameter Symbol Value Units DC supply voltage range (pin 1, ICC = 20mA max) VCC -0.3 to 18.0 V Continuous DC supply current at VCC pin (VCC = 15V) ICC 20 mA VIN (pin 3) -0.3 to 18.0 V OUTPUT (pin 6) -0.3 to 18.0 V FB/FMAX input (pin 2, IFB/OTP ≤ 10mA) -0.7 to 4.0 V CS/FMIN input (pin 4) -0.3 to 4.0 V Maximum junction temperature TJMAX 150 °C Operating junction temperature TJOPT -40 to 150 °C Storage temperature TSTG -65 to 150 °C θJA 190 °C/W ±2,000 V ±100 mA Thermal resistance junction-to-ambient ESD rating per JEDEC JESD22-A114 Latch-up test per JESD78D Product Summary www.dialog-semiconductor.com Rev. 1.3 5 of 7 28-April-2017 © 2017 Dialog Semiconductor iW3627 Off-Line Digital Constant-Voltage LED Driver with Power Factor Correction 6 Physical Dimensions 6-Lead SOT Package 5 6 4 E E1 1 2 3 e e1 A1 A2 B A α SEATING PLANE COPLANARITY 0.10 L C Symbol D MIN MAX A - 1.45 A1 0.00 0.15 A2 0.90 1.30 B 0.30 0.50 C D 0.08 0.22 2.90 BSC 2.80 3.00 E 2.80 BSC E1 1.60 BSC e 0.95 BSC e1 1.90 BSC Millimeters L 0.30 0.60 α 0° 8° 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. 7 Ordering Information Part Number Description Package Description iW3627-00 VIPK(LOW) = 0.16V, maximum NVO up to 90V SOT-23 Tape & Reel1 iW3627-01 VIPK(LOW) = 0.2V, maximum NVO up to 145V SOT-23 Tape & Reel1 Note 1: Tape & Reel packing quantity is 3,000/reel. Minimum ordering quantity is 3,000. Product Summary www.dialog-semiconductor.com Rev. 1.3 6 of 7 28-April-2017 © 2017 Dialog Semiconductor iW3627 Off-Line Digital Constant-Voltage LED Driver with Power Factor Correction 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 specification 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. 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All other product or service names are the property of their respective owners. © 2017 Dialog Semiconductor. All rights reserved. RoHS Compliance Dialog Semiconductor’s 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 certificates from our suppliers are available on request. Contacting Dialog Semiconductor United Kingdom (Headquarters) Dialog Semiconductor (UK) LTD Phone: +44 1793 757700 North America Dialog Semiconductor Inc. Phone: +1 408 845 8500 Singapore Dialog Semiconductor Singapore Phone: +65 64 8499 29 China (Shenzhen) Dialog Semiconductor China Phone: +86 755 2981 3669 Germany Dialog Semiconductor GmbH Phone: +49 7021 805-0 Japan Dialog Semiconductor K. K. 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