TS19721A Taiwan Semiconductor Single-Stage PFC Buck Current Control LED Driver With High Voltage MOSFET Integrated DESCRIPTION FEATURES TS19721A a very efficient constant current controller ● Integrated 700V Power MOSFET for driving LED lamps in non-dimmable lighting ● Low THD <20% (Option) applications. The IC provides a high power factor ● Constant Current Accuracy within ±2.5% correction with ● High Power Factor Correction >0.9 boundary conduction mode (BCM) operation in a and constant current accuracy ● Low BOM Cost single stage buck topology. The TS19721A controller ● Boundary Current Mode Control is easy to integrate with a small BOM and includes an ● LED Open Protection & Short Protection internal high voltage power MOSFET for PWM control. ● Over Current Protection (OCP) Total harmonic distortion (THD) and efficiency are ● Over Temperature Protection (OTP) optimized by an external resistor. The line and load APPLICATION regulation of LED current are easily maintained to within ±2.5%. TS19721A also provides VCC over- ● LED lighting voltage protection, and output open/short circuit ● Down lights, Tube lamps, PAR Lamps, Bulbs protection. SOP-8 Pin Definition: 1. CS 2. COM 3. N/C 4. Drain 5. RT 6. GND 7. VCC 8. CS Notes: Moisture sensitivity level: level 3. Per J-STD-020 ABSOLUTE MAXIMUM RATINGS (TA = 25°C unless otherwise specified) (Note 1) PARAMETER SYMBOL LIMIT UNIT Power Supply Pin VCC 40 V RT Voltage to GND VRT -0.3 to 5.5 V DRAIN Voltage to GND VOUT -0.3 to 700 V CS Voltage to GND VCS -0.3 to 5.5 V VCOM -0.3 to 5.5 V Junction Temperature Range TJ -40 to +150 °C Storage Temperature Range TSTG -65 to +150 °C Lead Temperature (Soldering 10s) TLEAD 260 °C PD 0.3 W HBM 2 kV MM 200 V COM Voltage to GND Power Dissipation @ TA=25 °C ESD Rating (Human Body Mode) ESD Rating (Machine Mode) (Note 2) (Note 2) Document Number: DS_P0000195 1 Version: A15 TS19721A Taiwan Semiconductor THERMAL PERFORMANCE (Note 3) PARAMETER Thermal Resistance - Junction to Case Thermal Resistance - Junction to Ambient SYMBOL LIMIT RӨJC 106.6 o 220 o RӨJA UNIT C/W C/W RECOMMENDED OPERATING CONDITION (TA = 25°C unless otherwise specified) (Note 4) PARAMETER SYMBOL LIMIT UNIT Power Supply Pin VCC 33 V RT Voltage to GND VRT -0.3 to 5 V DRAIN Voltage to GND VOUT -0.3 to 700 V CS Voltage to GND VCS -0.3 to 5 V VCOM -0.3 to 5 V Operating Junction Temperature Range TJ -40 to +150 °C Operating Ambient Temperature Range TOPA -40 to +85 °C COM Voltage to GND ELECTRICAL SPECIFICATIONS (TA = 25°C unless otherwise specified) PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT VCC= VUVLO(on) -1V -- 45 -- μA With 1nF load on out pin -- 2.1 2.6 mA Supply Voltage Start-up Current Operating Current VCC(ST) IOPA UVLO(off) VUVLO(off) 7 8 9 V UVLO(on) VUVLO(on) 16 17.5 19 V VOVP 29 31 33 V Feedback Reference Voltage VFB 0.196 0.2 0.204 V Transconductance GM -- 58 -- μS IO-SINK -- 5.8 -- μA IO-SOURCE -- 5.8 -- μA CS Limit Voltage VOCP -- 1.4 -- V Open Loop Voltage VOLP -- 5 -- V Leading-Edge Blanking Time LEBt -- 400 -- ns -- 100 -- ns fSTR 3 4.5 6 kHz BVDS 700 -- -- V RDS(ON) -- -- 1.4 Ω OVP Level on VCC Pin Voltage Feedback Output Sink Current Output Source Current Current Sensing CS Pin Open Delay to Output Switching Frequency Start Frequency MOSFET Section Drain-Source Breakdown Voltage Drain-Source On-Resistance Document Number: DS_P0000195 2 Version: A15 TS19721A Taiwan Semiconductor ELECTRICAL SPECIFICATIONS (TA = 25°C unless otherwise specified) PARAMETER Thermal Section SYMBOL CONDITION MIN TYP MAX UNIT -- 150 -- °C (Note 5, 6) Thermal Shutdown Thermal Shutdown Release -120 -°C Note: 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. 2. Devices are ESD sensitive. Handing precaution recommended. 3. Thermal Resistance is specified with the component mounted on a low efficiency test board in free air at TA=25°C. 4. The device is not guaranteed to function outside its operating conditions. 5. Guaranteed by design. 6. Auto Recovery Type. Document Number: DS_P0000195 3 Version: A15 TS19721A Taiwan Semiconductor ORDERING INFORMATION PART NO. PACKAGE PACKING TS19721ACS RLG SOP-8 2,500pcs / 13”Reel Note: 1. Compliant to RoHS Directive 2011/65/EU and in accordance to WEEE 2002/96/EC. 2. Halogen-free according to IEC 61249-2-21 definition. FUNCTION BLOCK PIN DESCRIPTION PIN NO. NAME 1,8 CS 2 COM 3 N/C 4 Drain 5 RT 6 GND 7 VCC FUNCTION Input current sense pin. Output pin of error amplifier. No Connect. Drain of internal HV MOS. Efficiency / THD option pin. Ground return for all internal circuitry. Power supply pin for all internal circuitry. Document Number: DS_P0000195 4 Version: A15 TS19721A Taiwan Semiconductor APPLICATION INFORMATION Start-up Current The typical start-up current is around 45μA. The very low start-up current allows the PWM controller to operate with a high value start-up resistor and reduce overall power dissipation. UVLO(Under Voltage Lockout) A hysteretic UVLO comparator is implemented in TS19721A. The turn-on and turn-off thresholds level are fixed at 17.5V and 8V respectively. This hysteresis shown in Fig.1 ensures that the start-up capacitor will be adequate to supply the chip during start-up. For quick start-up of the LED driver, the start-up resistor & capacitor needs to optimize for application. Fig. 1 LEB(Leading-Edge Blanking) Each time the power MOSFET is switched on, a turn-on spike will inevitably occur at the sense resistor. A 400ns leading-edge blanking time is built in to avoid a false trigger.. Conventional RC filtering can therefore be omitted. During this blanking period, the current-limit comparator is disabled and cannot switch off the gate driver. OCP(Over Current Protection) The TS19721A has built-in cycle-by-cycle over-current protection functions available at the CS pin. When the CS pin voltage is larger than VOCP (1.4V), the gate output will be turned off immediately to avoid over temperature damage. OVP (Over Voltage Protection) on VCC To prevent the LED driver from being damaged, the TS19721A has an integrated OVP on VCC. When the VCC voltage is higher than the VOVP (31V), the output MOSFET will be shut down immediately. The OVP on the VCC pin will automatically recover.. If the OVP triggers, the output PWM pulses will be stopped until the VCC pin voltage returns to the UVLO off level when the TS19721A will automatically recover as shown in Fig. 2. Fig. 2 Document Number: DS_P0000195 5 Version: A15 TS19721A Taiwan Semiconductor PACKAGE OUTLINE DIMENSIONS (Unit: Millimeters) SOP-8 SUGGESTED PAD LAYOUT (Unit: Millimeters) MARKING DIAGRAM x = Series code Y = Year Code M = Month Code for Halogen Free Product O =Jan P =Feb Q =Mar R =Apr S =May T =Jun U =Jul V =Aug W =Sep X =Oct Y =Nov Z =Dec L = Lot Code (1~9, A~Z) Document Number: DS_P0000195 6 Version: A15 TS19721A Taiwan Semiconductor Notice Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale. Document Number: DS_P0000195 7 Version: A15