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UNISONIC TECHNOLOGIES CO., LTD UPSD1630 Preliminary CMOS IC www.unisonic.com.tw 1 of 6 Copyright © 2013 Unisonic Technologies Co., Ltd QW-R502-A01.a PSR, SINGLE STAGE, AC-DC LED DRIVER WITH ACTIVE PFC  DESCRIPTION The UTC UPSD1630 is a primary-side-control AC-DC LED driver which can achieve high power factor and accurate LED current for an isolate lighting application in a single stage converter. The LED current can be controlled accurately from the primary side information. It can significantly simplify the LED lighting system design by eliminating the secondary side feedback components and the opto-coupler. The UTC UPSD1630 integrates power factor correction function and works in DCM and constant TOFF time mode for reducing the harmonic current emission (THD). The UTC UPSD1630 achieves high precision output current regulation and high power efficiency. It offers comprehensive protection coverage with auto-recovery features including V DD over voltage protection, OTP, over current protection (OCP), output over voltage protection, output short circuit protection (SCP), leading edge blanking, VDD under voltage lockout, etc.  FEATURES SOP-8 * ±3% constant current regulation at universal AC input * Primary side control without TL431 and opto-coupler * Built-in power factor correction * Up to 50W power drivability * Flyback topology in DCM operation * Driver MOSFET switch * Built-in leading edge blanking * Cycle-by-cycle current limiting * Under-voltage lockout * V DD over voltage protection * Output over voltage protection * Output short circuit protection * Power on soft-start  ORDERING INFORMATION Ordering Number Package Packing Lead Free Halogen Free UPSD1630L-S08-T UPSD1630G-S08-T SOP-8 Tube UPSD1630L-S08-R UPSD1630G-S08-R SOP-8 Tape Reel (1) R: Tape Reel (2) S08: SOP-8 (3) L: Lead Free, G:Halogen Free UPSD1630L-S08-R (1)Packing Type. (2)Package Type (3)Lead Free

UPSD1630 Preliminary CMOS IC UNISONIC TECHNOLOGIES CO., LTD 2 of 6 www.unisonic.com.tw Q W - R 5 0 2 - A 0 1 . a  PIN CONFIGURATION 1 CS COMP DRV GND TM VDD DSEN STP 4 5  PIN DESCRIPTION PIN NO. PIN NAME DESCRIPTION 1 DRV Gate drive for power MOSFET. 2 GND Ground. 3 TM Test pin. Always tie to ground. 4 COMP Connect a capacitor to ground for frequency compensation. 5 STP Start-up pin. 6 DSEN The voltage feedback from auxiliary winding. 7 V DD Power supply. 8 CS Current sense input.  BLOCK DIAGRAM 6 + LEB STP Regulator & Vref VDD TM DSEN Por OVP Logic core 19V Tdemag detector SCP OVP 0.2V 3.2V Constant TOFF Control COMP GND 0.4V Current regulation CS 2.2V Drive DRV

UPSD1630 Preliminary CMOS IC UNISONIC TECHNOLOGIES CO., LTD 3 of 6 www.unisonic.com.tw Q W - R 5 0 2 - A 0 1 . a  ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT STP, VDD, DRV Voltage -0.3~25 V All Other Pins Voltage -0.3~6 V Junction Temperature T J 150 °C Storage Temperature T STG -55~150 °C Note: Absolute maximum ratings are those values be yond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.  RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL RATINGS UNIT Supply Voltage V CC 7.2~18 V Operating Temperature T OPR -40~105 °C  THERMAL RESISTANCE PARAMETER SYMBOL RATINGS UNIT Case to Ambient θCA 128 °C/W  ELECTRICAL CHARACTERISTICS (VDD=12V, TA=25°C unless otherwise stated.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Start-up Start up Current I START 25 50 μA Lower Threshold Voltage of VDD UVLO V DD Pin Ramp Down 7.2 8.5 V Start-Up Voltage V START V DD Pin Ramp Up 17.5 18.5 20 V Supply Current Quiescent Current I Q No Switching 1.2 mA Operating Current I CC Fs=70kHz 3 mA Control Loop Primary Current Sense Voltage V FB 392 400 408 mV Upper Limit of COMP V COMPH 2.1 2.2 2.4 V Off Time of DRV T OFF 10 11 12 μS Short Circuit Protection Threshold at DSEN Pin SCP 200 mV Over Voltage Protection Threshold at DSEN OVP1 3.2 V Over Voltage Protection Threshold at VDD pin OVP2 19.2 23.5 V Current Sense Leading Edge Blanking of CS LEB 300 nS Over Current Protection at CS Pin OCP 2.2 2.4 V Thermal Protection Over Temperature Protection OTP 150 °C Over Temperature Release Hysteresis 15 °C Drive Stage Rising Time (Note 1) T R CL=1nF, DRV Pin Falls from VDD to 0V 50 nS Falling Time (Note 1) T F CL=1nF, DRV Pin Rises from 0V to VDD 30 nS Note: 1. Guaranteed by design.

UPSD1630 Preliminary CMOS IC UNISONIC TECHNOLOGIES CO., LTD 4 of 6 www.unisonic.com.tw Q W - R 5 0 2 - A 0 1 . a  APPLICATION INFORMATION The UTC UPSD1630 is a primary-side-control AC-DC LED driver which can achieve high power factor and accurate LED current for an isolate lighting applicatio n in a single stage converter. The LED current can be controlled accurately from the primary side information and integrates power factor co rrection function and works in DCM and constant OFF time mode for reducing the harmonic current emission (THD). Startup Control A soft-start function is implemented to prevent the transformer from entering into CCM. The V DD pin of UTC UPSD1630 is charged through a startup resistor. When the VDD voltage reaches VTH(ON), the internal startup circuit is disabled and the IC turns on. Then, the STP pin is clamped to lower than VDD voltage about 0.2V. Operating Current The Operating current of UTC UPSD1630 is as low as 3mA. Good efficiency and very low standby power can be achieved. Constant Current Operation UTC UPSD1630 use the primary side constant current control method to accura tely control the LED current. The LED real current can be approximated as: CSS P LED R V4.0 N N×2 1I ≈ Where NP is primary winding, NS is secondary winding; RCS is an external current sensing resistor. Power Factor Correction The primary side current increases linearly from zero to peak value, during the external MOSFET on-time. When the primary current reac hes the threshold, UTC UPSD1630 turns off the power MOSFET immediately. After a constant OFF time, T OFF, UTC UPSD1630 turns on the power MOSFET again. The peak current threshold follows the rectified sinusoidal-shape of ma in line voltage. As a result, the envelope of the inductor current is sinusoidal-shaped, high power factor is therefore achieved in this way. Over-voltage Protection UTC UPSD1630 built-in two over-voltage protection schemes: (1) If DSEN pin’s voltage is detected above 3.2V for three times, UTC UPSD1630 turns off the PWM switching signal, and VDD voltage gradually drops to UVLO threshold, and the syst em will be re-started. The threshold voltage of the output over voltage protection can be easily defined as: A S OVP_OUT N N×)6R 5R+1(×2.3=V- V D8 Where NS is the secondary winding, N A is auxiliary winding, V D8 is the forward bias of the secondary side rectifier diode. (2) If V DD pin’s voltage exceeds 19.2V three times, UTC UPSD1630 turns off the PWM switching signal, and V DD gradually drops to UVLO threshold, and then the system will be re-started.

UPSD1630 Preliminary CMOS IC UNISONIC TECHNOLOGIES CO., LTD 5 of 6 www.unisonic.com.tw Q W - R 5 0 2 - A 0 1 . a  APPLICATION INFORMATION (Cont.) Short-circuit Protection The short-circuit protection is triggered if the DSEN pin voltage is detected below 0.2V for a continuous time of 640μs. The gate drive switching will be turned off, and a restart process will be kicked off when the V DD voltage drops below the UVLO threshold. This re-start process will repeat if the short-circuit condition continues to exist. Current Sensing and Leading Edge Blanking Cycle-by-cycle current limiting is offered in UTC UPSD1630. The switch current is detected by a sense resistor into the CS pin. When the power switch is turned on, a turn-on spike will occur on this resistor. A 500ns leading-edge blanking is built in to avoid false-termination of the switching pulse so that the external RC filtering is no longer needed. Other Protection Control Good power supply system reliability is achieved with its comprehensive protection features including V DD over voltage protection, OTP, over current protection (OCP), output over voltage protection, output short circuit protection (SCP), leading edge blanking, VDD under voltage lockout, etc. VDD is supplied by transformer auxiliary winding output. The output of UTC UPSD1630 is shutdown when VDD drops below VTH(OFF) and the power converter enters power on start-up sequence thereafter.

UPSD1630 Preliminary CMOS IC UNISONIC TECHNOLOGIES CO., LTD 6 of 6 www.unisonic.com.tw Q W - R 5 0 2 - A 0 1 . a  TYPICAL APPLICATION CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.