TS19705 Single-Stage PFC Primary-Side-Regulation LED Driver SOT-26 Pin Definition: 1. Compensation 2. Ground 3. Current Sense 4. Output 5. VCC 6. DMG Description TS19705 is a primary-side-regulation with Fly-back control IC with active power factor correction function for LED lighting applications. The IC achieves high power factor and low Total Harmonic Distortion (THD) operation by Boundary Conduction Mode (BCM). The line and load regulation of LED current is about <±3% because of particular control method. TS19705 also provides gate driving voltage clamping, VCC overvoltage protection and system output open/short circuit protection to increase IC performance. Features Applications ● Constant Current Accuracy within <±3% ● Primary-Side Feedback Control ● E27, T5, T8 LED Lighting ● ● ● ● ● ● ● ● ● ● ● LED Down Light Application Voltage Range: 90~ 264VAC Transition-Mode PFC Operating Built-in Active Power Factor Correction Constant Output Current Control Good Line and Load Regulation Open-LED Protection on DMG pin Over-Voltage Protection on VCC pin Short-LED Protection Cycle by Cycle Over Current Protection on CS pin Over-Temperature Protection ● LED Bulb ● LED Lighting Applications Ordering Information Part No. Package Packing TS19705CX6 RFG SOT-26 3kpcs / 7” Reel Note: “G” denote for Halogen Free Product ● Gate Driving Voltage Clamping Absolute Maximum Ratings (TA = 25oC unless otherwise noted) (Note 1) Parameter Symbol Range Unit Power supply pin VCC 40 V DMG voltage to GND VDMG -0.3 to 40 V OUT voltage to GND VOUT -0.3 to 40 V CS voltage to GND VCS -0.3 to 5.5 V VCOM -0.3 to 5 V Junction Temperature Range TJ -40 to +150 °C Storage Temperature Range TSTG -65 to +150 °C PD 0.3 W ESD 2 kV Symbol Range Unit Thermal Resistance Junction to Ambient RθJA 220 °C/W Thermal Resistance Junction to Case RθJC 106.6 °C/W COM voltage to GND Power Dissipation @TA=25 °C ESD Rating (Human Body Model) Thermal Information (Note 2) Parameter 1/7 Version: B14 TS19705 Single-Stage PFC Primary-Side-Regulation LED Driver Recommended Operating Conditions Parameter Symbol Conditions Unit Power supply pin VCC 38 V DMG voltage to GND VDMG -0.3 to 38 V OUT voltage to GND VOUT -0.3 to 38 V CS voltage to GND VCS -0.3 to 5 V VCOM -0.3 to VCC V Operating Junction Temperature Range TJ -40 to +125 °C Operating Ambient Temperature Range TOPA -40 to +85 °C COM voltage to GND Electrical Characteristics (VCC=15 , TA=25℃, unless otherwise specified) Parameter Symbol Condition Min Typ Max Unit Turn-on voltage VCC_ON 17 18 19 V Turn-off voltage VCC_OFF 8.5 9.5 10 V Quiescent current 1 IQ1 VCC=17V, @ VCC off -- 30 50 µA Quiescent current 2 IQ2 Start-up @ 4.5kHz -- 600 800 µA Operation supply current ICC -- 2.5 3..0 mA VCC voltage protection VOVPA 31 32 34 V Output voltage protection VOVPS 10 10.5 11 V CS limit voltage VOCP 1.15 1.25 1.35 V Short circuit protection VSCP -- 3 -- V tSTR -- 220 -- µs gm -- 60 -- µA/V Sink current ICOMP_SINK -- 20 -- µA Source current ICOMP_SOU -- 20 -- µA Protection Guaranteed by design Oscillator Start-up timer GM Amplifier Transconductance Driver Dropout voltage VOH VCC=33V, IO = 10mA -- 1.2 1.5 V VOL VCC=33V, IO = -10mA -- 0.12 -- V Rising time tr VCC=20V, CO =1nF -- 40 -- ns Falling time tf VCC=20V, CO =1nF -- 80 -- ns VO_CLAMP -- -- 19 V LEBt -- 0.5 -- ns Output clamp voltage Leading edge blanking time Note: 1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. 2. Thermal Resistance is specified with the component mounted on a low effective thermal conductivity test board in free air at TA=25°C. 2/7 Version: B14 TS19705 Single-Stage PFC Primary-Side-Regulation LED Driver Function Block Pin Description Pin No. Name Function 1 COM Output pin of error amplifier. 2 GND Ground return for all internal circuitry. 3 CS Input current sense pin. 4 OUT Power MOS output pin. 5 VCC Power supply pin for all internal circuitry. 6 DMG Zero current demagnetization sensing. Typical Application Circuit 3/7 Version: B14 TS19705 Single-Stage PFC Primary-Side-Regulation LED Driver Application Information Function Description The TS19705 is a constant current Fly-back controller with primary side control and PFC function for LED lighting applications. The controller is Boundary Conduction Mode (BCM) operation with constant on time based regulator design to achieve high power factor performance. The TS19705 has built-in VCC over voltage protection, open LED protection, short LED protection, over temperature protection, primary side current limit and gate clamp functions. The average output current can be expressed as below. Where : IO_avg is the average output current NP is the primary-side turn ratio NS is the secondary-side turn ratio RS is the sensing resistor connected between the MOSFET source and the GND Pin Detail Compensation This is the output of the gm amplifier. Connect with a suitable RC network to ground. Ground GND is the reference node of internal circuit. Current Sense MOSFET current signal sensing for multiplication and current limit setting function. Where : ICS is the input current sence RS is the sensing resistor connected between the MOSFET source and GND Output Gate drive for external MOSFET switch and is built-in gate clamp function. VCC Power supply for the controller during normal operation. The controller will start up when VCC reaches 18V (typical) and will shut-down when VCC voltage is below 9.5V (typical). A decoupling capacitor should be connected between the VCC and GND pin as close as possible. The TS19705 performs VCC over voltage protection though VCC pin. Once VCC pin exceeds in 32V, TS19705 turns off and latchs out the MOSFET switcher until VCC goes below VCC_OFF. 4/7 Version: B14 TS19705 Single-Stage PFC Primary-Side-Regulation LED Driver Application Information (Continue) DMG The Output voltage is reflected by the auxiliary winding (NAUX) voltage of Flyback transformer, the DMG pin can sense output information to depart from start up voltage (VO_STR) and protection voltage (VO_OVP). When DMG sense voltage under VO_STR, the circuit will work on short circuit protection, f STR=1/tSTR. When DMG sense voltage over VO_OVP, the circuit will work on over voltage protection, it will latchs out until VCC goes below VCC_OFF. Rvcc VCC LA R1 NAUX DMG R2 Where : VOUT_OVP is the output-over-voltage protection point VOVPS is the over voltage protection signal VO_STR is the start-up timer NAUX is the number of auxiliary-winding turns NSEC is the number of secondary-winding turns 5/7 Version: B14 TS19705 Single-Stage PFC Primary-Side-Regulation LED Driver SOT-26 Mechanical Drawing Unit: Millimeters Marking Diagram RS L Y W = Device Code = Lot Code A~Z = Year Code (D=2014, E=2015, F=2016, G=2017, H=2018, J=2019, K=2020) = Week Code A~Z = wk1~wk26 A~Z = wk27~wk52 6/7 Version: B14 TS19705 Single-Stage PFC Primary-Side-Regulation 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. 7/7 Version: B14