iW3629 Two-Stage, Flickerless™ Digital Off-Line LED Driver with High PF and Low THD 1 Description The iW3629 is a high-performance AC/DC off-line digital power supply controller for LED luminaires up to 120W or above. The two-stage design combines high power factor (PF > 0.95), low total harmonic distortion (THD <10%) and negligible line frequency ripple (< 5%) to make the iW3629 ideal for high-power non-dimmable LED lamps and luminaires. The two-stage approach allows the first-stage boost converter to convert the rectified AC voltage (90VAC to 277VAC) to an intermediate voltage while correcting for power factor. The second-stage flyback converter then provides the constant current regulation to the LEDs. The combination of an active start-up circuit and fast yet smooth soft-start for both boost and flyback stages results in a start-up time (AC plug-in to 90% of set LED current) of less than a half second and fast power factor settling time. The iW3629 operates in a quasi-resonant mode to provide high efficiency and uses Dialog’s PrimAccurate™ advanced primary-side sensing technology to achieve excellent line and load regulation without secondary-feedback components. And, by using Dialog’s Flickerless™ technology, virtually all flicker is removed from the output. The digital control algorithms used by the iW3629 maintain stability over all operating conditions without the need for any external loop compensation components, minimizing the BOM cost. 2 Features ●● Supports universal, 90VAC-277VAC input voltage range and output power up to 120W or above ●● Two-stage design (boost and flyback) ●● Flickerless technology - removes virtually all flicker ●● PrimAccurate primary-side sensing eliminates the need for optocoupler feedback and simplifies design xx High PF (> 0.95) and low THD (< 10%) over entire ●● Tight LED current regulation (± 5%) input voltage range and 50%-100% load current ●● Under 0.5s start-up time ●● Under 5% 100Hz/120Hz output current ripple ●● Hot-plug LED module support ●● Quasi-resonant control for both boost and flyback stages to achieve high efficiency ●● Multiple protection features: ●● Over-temperature derating protection with external NTC to program derating start temperature xx Single-fault protection xx LED open circuit protection ●● Fast yet smooth boost start-up scheme to achieve short PF settling time xx Over-current protection ●● Fast line transient response ensures minimal bulk voltage overshoot within the capacitor safety limit xx Current sense-resistor-short-circuit protection xx LED short-circuit protection xx Input over-voltage and brown-out protection ●● Small size design xx Internal junction temperature-based overtemperature protection xx Small size input bulk capacitor xx Small size output capacitor xx Small transformer 3 Applications ●● Non-dimmable LED lamps and luminaires ●● Output power up to 120W or above Product Summary www.dialog-semiconductor.com Rev. 1.1 1 of 6 23-August-2017 © 2017 Dialog Semiconductor iW3629 Two-Stage, Flickerless™ Digital Off-Line LED Driver with High PF and Low THD Boost Converter Flyback Converter AC Input VOUT 4 BDRV 1 BVSENSE 3 BISENSE 14 VCB 6 ASU iW3629 7 VCC FDRV 10 RTN FISENSE 11 FVSENSE 12 2 VIN AGND PGND CFG VT 9 8 5 13 NTC -01 Figure 3.1 : iW3629 Typical Application Circuit with Internal (-00) or External (-01) Sensing Product Summary www.dialog-semiconductor.com Rev. 1.1 2 of 6 23-August-2017 © 2017 Dialog Semiconductor iW3629 Two-Stage, Flickerless™ Digital Off-Line LED Driver with High PF and Low THD 4 Pinout Description iW3629 VCB 14 1 BV SENSE 2 VIN VT 13 3 BISENSE 4 BDRV FVSENSE 12 FISENSE 11 5 CFG FDRV 10 6 ASU AGND 9 7 VCC PGND 8 Figure 4.1 : 14-Lead SOIC-14 Package Pin Number Pin Name Type 1 BVSENSE Analog Input Boost inductor voltage feedback used for valley mode switching. 2 VIN Analog Input Rectified AC line voltage feedback. -00 uses internal resistor (15kΩ typically) to sense line voltage; -01 needs an external resistor connected from this pin to GND. 3 BISENSE Analog Input Boost current sense (only used for cycle-by-cycle peak current limit). Connect an approximately 1kΩ resistor to the source of the boost MOSFET switch to improve noise immunity. 4 BDRV Output 5 CFG Analog In/Out 6 ASU Output Control signal for active start-up device. This signal is pulled low after start-up is finished to cut off the active device. If not using active start-up device, leave this pin floating. 7 VCC Power Power supply for control logic and voltage sense for power-on reset circuitry. A decoupling capacitor of 0.1μF or so should be connected between the VCC pin and GND. 8 PGND Ground Power ground. 9 AGND Ground Signal ground. 10 FDRV Output Gate drive for Flyback MOSFET. 11 FISENSE Analog Input Primary current sense (used for cycle-by-cycle peak current control and limit). Connect an approximately 1kW resistor to the source of the flyback MOSFET switch to improve noise immunity. 12 FVSENSE Analog Input Auxiliary voltage sense (used for primary-side regulation and valley mode switching). 13 VT Analog Input Output power limit and shutdown control. An NTC resistor connected from this pin to GND provides over-temperature derating protection. 14 VCB Analog Input Boost output voltage feedback. -00 uses internal resistor (15kW typically) to sense line voltage; -01 needs an external resistor connected from this pin to GND. Product Summary www.dialog-semiconductor.com Pin Description Gate drive for boost MOSFET. Chooses input start-up voltage and brown-out shutdown voltage. Rev. 1.1 3 of 6 23-August-2017 © 2017 Dialog Semiconductor iW3629 Two-Stage, Flickerless™ Digital Off-Line LED Driver with High PF and Low THD 5 Absolute Maximum Ratings Absolute maximum ratings are the parameter values or ranges which can cause permanent damage if exceeded. Parameter Symbol Value Units VCC -0.3 to 18 V FDRV output (pin 10) -0.3 to 18 V BDRV output (pin 4) -0.3 to 18 V CFG input (pin 5) -0.3 to 4.0 V FVSENSE input (pin 12, I ≤ 10mA) -0.7 to 4.0 V BVSENSE input (pin 1, I ≤ 3mA) -0.7 to 4.0 V VIN input (pin 2) -0.3 to 18 V VCB input (pin 14) -0.3 to 18 V FISENSE input (pin 11) -0.3 to 4.0 V BISENSE input (pin 3) -0.3 to 4.0 V ASU output (pin 6) -0.3 to 18 V VT input (pin 13) -0.3 to 4.0 V DC supply voltage range (pin 7) Maximum junction temperature TJMAX 150 °C Operating junction temperature TJOPT -40 to 150 °C Storage temperature TSTG -65 to 150 °C Thermal Resistance Junction-to-PCB Board Surface Temperature ψJB 45 °C/W ±2,000 V ESD rating per JEDEC JESD22-A114 Product Summary www.dialog-semiconductor.com Rev. 1.1 4 of 6 23-August-2017 © 2017 Dialog Semiconductor iW3629 Two-Stage, Flickerless™ Digital Off-Line LED Driver with High PF and Low THD 6 Physical Dimensions 14-Lead SOIC Package D 8 1 7 E e TOP VIEW h x 45° A1 0 c SEATING PLANE ccc COPLANARITY 0.10 (0.004) MAX MIN MAX A 0.053 0.069 1.35 1.75 A1 0.004 0.010 0.10 0.25 b 0.013 0.020 0.33 0.51 c 0.007 0.010 0.19 0.25 D 0.337 0.344 8.55 8.75 E1 0.150 0.157 3.80 4.00 E 0.228 0.244 5.80 6.20 e A b Symbol E1 14 Inches MIN L 0.050 BSC 1.27 BSC L 0.016 0.050 0.40 1.27 h 0.010 0.020 0.25 0.50 0 0° 8° 0° ccc SIDE VIEWS Millimeters 0.004 8° 0.10 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 E 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 E 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. Figure 6.1 : Physical Dimensions of 14-Pin SOIC Package 7 Ordering Information Part Number Options Package Description iW3629-00 Internal sensing for VIN and VCB; ZIN = 15kW and ZCB = 15kW SOIC-14 Tape & Reel1 iW3629-01 External sensing for VIN and VCB SOIC-14 Tape & Reel1 Note 1: Tape & Reel packing quantity is 2,500/reel. Minimum ordering quantity is 2,500. Product Summary www.dialog-semiconductor.com Rev. 1.1 5 of 6 23-August-2017 © 2017 Dialog Semiconductor iW3629 Two-Stage, Flickerless™ Digital Off-Line LED Driver with High PF and Low THD 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. 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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. Phone: +81 3 5425 4567 Hong Kong Dialog Semiconductor Hong Kong Phone: +852 3769 5200 China (Shanghai) Dialog Semiconductor China Phone: +86 21 5424 9058 The Netherlands Dialog Semiconductor B.V. Phone: +31 73 640 8822 Taiwan Dialog Semiconductor Taiwan Phone: +886 281 786 222 Korea Dialog Semiconductor Korea Phone: +82 2 3469 8200 Email [email protected] Web site: www.dialog-semiconductor.com Product Summary www.dialog-semiconductor.com Rev. 1.1 6 of 6 23-January-2017 © 2017 Dialog Semiconductor