UNISONIC TECHNOLOGIES CO., LTD UPSL1630 Preliminary CMOS IC PSR, SINGLE STAGE, AC-DC LED DRIVER WITH ACTIVE PFC DESCRIPTION The UTC UPSL1630 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 UPSL1630 integrates power factor correction function and works in DCM and constant TOFF time mode for reducing the harmonic current emission (THD). The UTC UPSL1630 achieves high precision output current regulation and high power efficiency. It offers comprehensive protection coverage with auto-recovery features including VDD 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 * ±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 SOP-8 * Cycle-by-cycle current limiting * Under-voltage lockout * VDD over voltage protection * Output over voltage protection * Output short circuit protection * Power on soft-start ORDERING INFORMATION Ordering Number UPSL1630G-S08-R UPSL1630G-S08-R Package SOP-8 Packing Tape Reel (1)Packing Type. (1) R: Tape Reel (2)Package Type (2) S08: SOP-8 (3)Green Package (3) G: Halogen Free and Lead Free www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 7 QW-R502-A010.b UPSL1630 Preliminary MARKING PIN CONFIGURATION CMOS IC DRV 1 8 CS GND 2 7 VDD TM 3 6 DSEN COMP 4 5 STP PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 PIN NAME DRV GND TM COMP STP DSEN VDD CS DESCRIPTION Gate drive for power MOSFET. Ground. Test pin. Always tie to ground. Connect a capacitor to ground for frequency compensation. Start-up pin. The voltage feedback from auxiliary winding. Power supply. Current sense input. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 7 QW-R502-A010.b UPSL1630 Preliminary CMOS IC BLOCK DIAGRAM STP 5 Regulator & Vref VDD 7 + - 19V Por Logic core Drive LEB OVP + - TM 3 Tdemag detector DSEN 6 0.2V 3.2V 1 DRV + - SCP + OVP Current regulation Constant TOFF Control UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2.2V + 4 COMP 8 CS 0.4V 2 GND 3 of 7 QW-R502-A010.b UPSL1630 Preliminary CMOS IC 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 TJ 150 °C Storage Temperature TSTG -55~150 °C Note: Absolute maximum ratings are those values beyond 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 Supply Voltage Operating Temperature RATINGS 7.2~18 -40~105 UNIT V °C SYMBOL θCA RATINGS 128 UNIT °C/W THERMAL RESISTANCE PARAMETER Case to Ambient SYMBOL VCC TOPR ELECTRICAL CHARACTERISTICS (VDD=12V, TA=25°C unless otherwise stated.) PARAMETER Start-up Start up Current Lower Threshold Voltage of VDD Start-Up Voltage Supply Current Quiescent Current Operating Current Control Loop Primary Current Sense Voltage Upper Limit of COMP Off Time of DRV Short Circuit Protection Threshold at DSEN Pin Over Voltage Protection Threshold at DSEN Over Voltage Protection Threshold at VDD pin Current Sense Leading Edge Blanking of CS Over Current Protection at CS Pin Thermal Protection Over Temperature Protection Over Temperature Release Hysteresis Drive Stage SYMBOL ISTART UVLO VSTART IQ ICC TEST CONDITIONS VDD Pin Ramp Down VDD Pin Ramp Up MIN TYP MAX UNIT 17.5 25 7.2 18.5 50 8.5 20 μA V V No Switching Fs=70kHz VFB 1.2 3 392 2.1 10 VCOMPH TOFF 400 2.2 11 mA mA 408 2.4 12 mV V μS SCP 200 mV OVP1 3.2 V OVP2 19.2 23.5 V LEB OCP 300 2.2 2.4 nS V OTP 150 15 °C °C 50 nS 30 nS Rising Time (Note 1) TR Falling Time (Note 1) TF CL=1nF, DRV Pin Falls from VDD to 0V CL=1nF, DRV Pin Rises from 0V to VDD Note: 1. Guaranteed by design. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R502-A010.b UPSL1630 Preliminary CMOS IC APPLICATION INFORMATION The UTC UPSL1630 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 and integrates power factor correction 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 VDD pin of UTC UPSL1630 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 UPSL1630 is as low as 3mA. Good efficiency and very low standby power can be achieved. Constant Current Operation UTC UPSL1630 use the primary side constant current control method to accurately control the LED current. The LED real current can be approximated as: 1 N 0 .4 V ILED ≈ × P 2 NS RCS 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 reaches the threshold, UTC UPSL1630 turns off the power MOSFET immediately. After a constant OFF time, TOFF, UTC UPSL1630 turns on the power MOSFET again. The peak current threshold follows the rectified sinusoidal-shape of main 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 UPSL1630 built-in two over-voltage protection schemes: (1) If DSEN pin’s voltage is detected above 3.2V for three times, UTC UPSL1630 turns off the PWM switching signal, and VDD voltage gradually drops to UVLO threshold, and the system will be re-started. The threshold voltage of the output over voltage protection can be easily defined as: R5 NS )× VOUT _ OVP = 3.2 × (1 + -VD8 R6 N A Where NS is the secondary winding, NA is auxiliary winding, VD8 is the forward bias of the secondary side rectifier diode. (2) If VDD pin’s voltage exceeds 19.2V three times, UTC UPSL1630 turns off the PWM switching signal, and VDD gradually drops to UVLO threshold, and then the system will be re-started. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 7 QW-R502-A010.b UPSL1630 Preliminary CMOS IC 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 VDD 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 UPSL1630. 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 VDD 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 UPSL1630 is shutdown when VDD drops below VTH(OFF) and the power converter enters power on start-up sequence thereafter. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 7 QW-R502-A010.b UPSL1630 Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT L Is VLED D1 NP N STP VDD Rh R1 NS Co ILED NA COMP UTC DRV UPSL1630 CS DSEN GND TM Q1 RCS 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 7 QW-R502-A010.b