TS19702 High Power Factor Corrector LED Driver SOT-26 Pin Definition: 1. VCC 2. Ground 3. Output 4. Dimming 5. Compensation 6. Current Sense Description The TS19702 is a highly-integrated, low startup current, average current mode, one cycle control PFC and fixed switching frequency PWM controller. These functions enable the LED driver to easily meet the accuracy average LED current and high power factor requirements. The integrated functions also include the LED short protection, open protection, and internal over temperature protection. The COMP pin controls the duty by connected an RC compensation network to ground and forming the closed loop feedback control. To protect the external power MOSFET from being damaged by supply over voltage, the TS19702 Output pin voltage is clamped to about 15V. Features Application ● High Power Factor by One Cycle Control ● E27, T5, T8 LED lighting ● Accuracy Constant Current ● LED Lighting Applications ● Low BOM Cost ● Linear Dimming on DIM Pin ● Average Current / Fixed Frequency Control ● Gate Output Voltage Clamp ● LED Open Protection (OVP) ● LED Short Protection (SCP) ● Over Current Protection (OCP) ● Internal OTP Protection ● 300mA Driving Capability for Output Pin Ordering Information Part No. Package Packing TS19702CX6 RFG SOT-26 3Kpcs / 7” Reel Note: “G” denote for Halogen Free Product Absolute Maximum Rating (Ta = 25oC unless otherwise noted) Parameter Symbol Limit Unit VCC 30 V VCOMP -0.3 ~ 7 V Dimming Pin VDIM -0.3 ~ 7 V Current Sense Pin VCS -0.3 ~ 7 V Output Pin VOUT 15 V PD 250 mW TOPR -20 ~ +85 o +150 o -65 ~ +150 o Supply Voltage Compensation Voltage Power Dissipation @ TA=85ºC Operating Ambient Temperature Junction Temperature TJ Storage Temperature Range TSTG Thermal Resistance - Junction to Ambient ESD Voltage Protection 1/9 C C C o RӨJA 250 C/W HBM 2 KV MM 200 V Version: A12 TS19702 High Power Factor Corrector LED Driver Electrical Characteristics (VCC=15 , TA=25℃, unless otherwise specified.) Parameter Symbol Min. Typ. Max. Unit ISTART -- 8 15 uA IOPR -- 2 3 mA IOPR -- 0.7 1 mA UVLOOFF UVLOON VOVP TOVP 7 14 26.5 -- 8 15 28 40 9 16 29.5 -- V V V us VFB 0.196 ---- 0.200 120 12 12 0.204 ---- V uS uA uA 0.7 ---- 0.80 5 V V 410 100 0.9 --220 45 -- 48 -- +/-4 --- -- KHz % % TEMP STB VSTB 42 90 ---- 6 1 % % Rising Time, Load Capacitance =1000pF Falling Time, Load Capacitance =1000pF VGATE-Clamp (VCC=25V) DIM INPUT SECTION TRISING TFALLING VGATE ---- 160 80 13.5 320 160 15 nS nS V Saturation Threshold Voltage Linear Dimming Range LED Current off Threshold Voltage Current Source OTP SECTION SATTH DIM IOFFTH CS 3.0 0.3 -290 --300 -3.0 0.3 310 V V V uA OTP Trip Point OTP Release Point OTP Threshold Level OTP De-Bounce Time OTPTP OTPRP OTPTH OTPDBT 140 120 -40 150 130 20 80 160 140 -120 o Supply Voltage Startup Current (VCC=UVLO on - 1V) Operating Current (with 1nF load on OUT pin), Vcomp = 2.5V Operating Current (with 1nF load on OUT pin), Protection Tripped (OCP, OVP, SCP, OTP) UVLO(off) UVLO(on) OVP Level on VCC Pin OVP De-Bounce Time Voltage Feedback Feedback Reference Voltage Tran-Conductance Output Sink Current Output Source Current Current Sensing ISINK ISOURCE Input Over Voltage Protection Open Loop Voltage, CS Pin Open VIN-PROTECT VCS Leading-Edge Blanking Time Delay to Output Switching Frequency TLE TO-DELAY Switching Frequency Maximum Duty Frequency Jitter Range FSW D(MAX) Temp. Stability (-40°C ~ 125°C) Voltage Stability (VCC = 11V~25V) GATE DRIVER OUTPUT -- nS nS C C o C uS o Note 1: OCP, SCP, OTP: Auto Recovery Type Note 2: OVP, Auto Recovery Type (Latch off type optional) 2/9 Version: A12 TS19702 High Power Factor Corrector LED Driver Function Block Pin Description Pin No. Name Function 1 VCC Power supply pin 2 GND Ground pin 3 OUT The output driver for driving the external MOSFET 4 DIM Dimming control pin by input a DC voltage 5 COMP 6 CS Feedback compensation network Current sense pin, connect to sense the MOSFET current 3/9 Version: A12 TS19702 High Power Factor Corrector LED Driver Application Circuit Application Information Start-up Current The typical start-up current is around 8uA. Very low start-up current allows the PWM controller to increase the value of start-up resistor and then reduce the power dissipation on it. UVLO (Under Voltage Lockout) A hysteresis UVLO comparator is implemented in TS19702, then the turn-on and turn-off thresholds level are fixed at 15V and 8V respectively. This hysteresis shown in Fig.11 ensures that the start-up capacitor will be adequate to supply the chip during start-up. For quickly startup the LED driver, the start-up resistor should be matched with the startup capacitor. Due to the low UVLO on level, so the turn-on delay time will also never greater than the general PWM IC. Oscillator The maximum duty-cycle of internal oscillator is up to 90% for driving high LED voltage string. The frequency of the oscillator is fixed to 45KHz by internal setting. LEB (Leading-Edge Blanking) Each time the power MOSFET is switched on, a turn-on spike will inevitably occur at the sense resistor. To avoid fault trigger, a 410ns leading-edge blanking time is built in. Conventional RC filtering can therefore be omitted. During this blanking period, the current-limit comparator is disabled and can not switch off the gate driver. 4/9 Version: A12 TS19702 High Power Factor Corrector LED Driver Application Information (Continue) OCP (Over Current Protection) The TS19702 has an over current protection function on CS pin. An internal circuit detects the current level, when the current is larger than a threshold level, the gate output will keep on low level. Then VCC decreases below UVLO off level, the controller resets again. OVP (Over Voltage Protection) on VCC To prevent the LED driver from being damaged, the TS19702 is implemented an OVP function on VCC. When the VCC voltage is higher than the OVP threshold voltage 28V, the output gate driver circuit will be shut down immediately to stop the switching of power MOSFET. The VCC pin OVP function is an auto recovery type protection (latch off type optional). If the OVP condition happens, the pulses will be stopped and never recovery unless the VCC pin voltage is down to the UVLO off level. The TS19702 is working in an auto-recovery mode as shown in below figure Gate Clamp/Soft Driving Driver is clamped to 15V by an internal clamping circuit. Those damages usually come from undesired over-voltage gate signals. Under the conditions listed below, the gate output will turn off immediately to protect the power circuit. The TS19702 also has soft driving function to minimize EMI. Over Temperature Protection/Dimming Function The typical application for DIM pin is shown in above Fig. The NTC thermistor is setting as an external OTP protection. In the DIM pin, there is one comparator for latch-off mode protection. While the voltage on this pin is lower than 0.3V, the TS19702 will shut down. When the voltage is in the range of 0.3 to 3.0V, the TS19702 is operating on the linear dimming range. While the voltage is higher than 3.0V, the TS19702 is operating on the normal status. It also could let this Pin open when the function is not required for the user. 5/9 Version: A12 TS19702 High Power Factor Corrector LED Driver Electrical Characteristics Curve Figure 1. Star-Up current vs. Temperature Figure 2. Operating Current vs. Temperature Figure 3. UVLO-OFF vs. Temperature Figure 4. UVLO-ON vs. Temperature Figure 5. FB VREF vs. Temperature Figure 6. Output Sink Current vs. Temperature 6/9 Version: A12 TS19702 High Power Factor Corrector LED Driver Electrical Characteristics Curve Figure 7. Output Source Current vs. Temp. Figure 8. Input Over Voltage vs. Temperature Figure 9. Open Loop Voltage vs. Temperature Figure 10. Switching Frequency vs. Temp. 7/9 Version: A12 TS19702 High Power Factor Corrector LED Driver SOT-26 Mechanical Drawing DIM SOT-26 DIMENSION MILLIMETERS INCHES MIN MIN TYP MAX TYP A 0.95 BSC A1 8/9 MAX 0.0374 BSC 1.9 BSC 0.0748 BSC 0.1102 0.1181 B 2.60 2.80 3.00 0.1024 C 1.40 1.50 1.70 0.0551 0.0591 0.0669 D 2.80 2.90 3.10 0.1101 0.1142 0.1220 E 1.00 1.10 1.20 0.0394 0.0433 0.0472 F 0.00 -- 0.10 0.00 G 0.35 0.40 0.50 0.0138 0.0157 0.0197 0.0039 H 0.10 0.15 0.20 0.0039 0.0059 0.0079 I 0.30 -- 0.60 0.0118 -- 0.0236 J 5º -- 10º 5º -- 10º Version: A12 TS19702 High Power Factor Corrector LED Driver 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. 9/9 Version: A12