FT8261-RT

Preliminary FT8260/1/2x Fremont Micro Devices PSR Single-Stage AC-DC LED Driver with High PF FEATURES DESCRIPTION Primary side control without secondary The feedback circuit primary-side-control offline LED controller with high Single-stage active PFC for high power factor power factor, low THD and excellent current and low THD app accuracy for isolated LED lighting applications. FT8260/1/2x is a single stage High current accuracy ±3% No Dimming (FT8260/2x) rol from the prim prima The accurate current control primary side Three-level ON/Off Dimming (FT8261x) significantly simplifies the LED lightin lighting system Ultra-low start up current ng the e secondary side s design by eliminating feedback Cycle-by-cycle current limit d the opto-coupler. components and Over-voltage protection Short-circuit protection emely y low start-up startThe extremely current and quiescent Over temperature protection nt current Under voltage lockout protection onsumption, resulting resultin in excellent efficiency. consumption, APPLICATIONS of FT8260/1 FT8260/1/2 FT8260/1/2x reduce the power multi-pro multiThe multi-protection function of the FT8260/1/2x en greatly e enhances the system reliability and safety. AC/DC LED driver applications he The Signal and decorative LED light fu fun functions E14/E27/PAR30/PAR38/GU10 LED ED lam lamp short-circuit protection, cycle-by-cycle current limit, T8/T10 LED String over-temperature protection, VCC UVLO protection. © 2014 Fremont Micro Devices Inc. FT8260/1/2x such Confidential Rev0.86 features as fruitful over-voltage protection protection, DS8260/1x-A0-page1 Preliminary FT8260/1/2x Fremont Micro Devices TYPICAL APPLICATION CIRCUIT F1 V A C 85V— 265V C sn R sn E M I N p N s D f C o1 LE D + C o2 R 1 C 1 B1 D sn N vcc Ra D a R2 Rd (F T 8 2 6 1 x ) C 2 R U 1 4 8 3 C 4 L 7 R3 1 2 5 C 3 6 Rs LE D CY F1 VAC 85 V— 265V Csn R sn EMI B1 Np Ns Df Co1 LE D+ Co2 R1 C1 D sn N vcc Ra Da R2 Rd (F T 8 2 6 1 ) U1 C2 5 C4 R3 Q1 4 6 R4 3 1 2 C3 Rs LE DCY F1 V A C 85V— 265V C sn R sn E M I C 1 B 1 N p N s D f C o1 C o2 LED + R 1 D sn N vcc R a D a R 2 R d (F T 8 2 6 1 ) C 2 R U 1 7 ,8 6 3 C 4 L 5 R 3 4 2 1 C 3 Rs LE D C Y Figure 1: Typical Application Circuit © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page2 Fremont Micro Devices Preliminary FT8260/1/2x ABSOLUTE MAXIMUM RATINGS VCC to GND………………………………………………………………………………………………-0.3V to +25V Analog Inputs and Outputs……………………………………………………………………….……….. -0.3V to 6V D to GND…………………………………………………………………………………………………-0.3V to 650V Operating Temperature Range………………………………………………………………………-40 to +125 Junction Temperature…………………………………………………………………………...........-40 to +150 Storage Temperature Range ………………………………………………………………………-55 to +150 ESD Protection HBM………………………………………………………………………………………….….2000V ESD Protection MM……………………………………………………………………………... ……….. ………......….. 200V …….. * Stresses exceed those listed under “Absolute Maximum Ratings” may cause ause use permanent damage d Functional operation of the device at conditions beyond listed in the yond those lis list specification is not guaranteed. Prolonged exposure to extreme conditions nditions may affect device to the device. reliability or functionality. © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page3 Preliminary FT8260/1/2x Fremont Micro Devices PIN CONFIGURATION Top View Top View COMP 1 6 ZCD GND 2 5 VCC CS 3 4 GD Figure 2.1: FT8260/1 Top View CS 1 8 D GND 1 8 VCC COMP 2 7 D COMP 2 7 VCC ZCD 3 6 GND ZCD 3 6 D VCC 4 5 GND CS 4 5 D Figure 2.2: FT8260/1B/0DD Figure 2.3: FT8261/2DD T826 826 TERMINAL DESCRIPTION No. PIN FUNCTION 1 COMP 2 GND 3 CS Current sense pin. This pin connects to GND ts a current sense resistor r 4 GD Gate drive output pin. Clamped to 13V to avoid exc excessive gate drive voltage ex 5 VCC Power supply citor to o ground to sta st Internal EA’s output. This pin connects a capacitor stabilize the current control loop Ground Zero current detection pin. A negative edge triggers the turn on signal of the ed e external MOSFET. Connecting ecting this pin through a resistor divider from the auxiliary 6 ZCD winding to GND. Over-voltage cond condition is detected through ZCD. If ZCD voltage is condi higher than the (OVP) threshold after a blanking time of he e over-voltage protection pro pr 1us, the over-voltage condition r-voltage voltage cond conditio is detected Table1.1 e1.1 FT8260/1 FT8 terminal description No. PIN 1 CS 2 COMP FUNCTION Current sense pin. This pin connects a current sense resistor to GND nternal EA’s E Internal output. This pin connects a capacitor to ground to stabilize the current control contr loop contro Zero current detection pin. A negative edge triggers the turn on signal of the Z Ze internal MOSFET. Connecting this pin through a resistor divider from the auxiliary 3 ZCD ZC winding to GND. Over-voltage condition is detected through ZCD. If ZCD voltage is higher than the over-voltage protection (OVP) threshold after a blanking time of 1us, the over-voltage condition is detected 4 VCC Power supply 5,6 GND Ground 7,8 D Internal power MOSFET drain Table1.2 FT8260/1B/0DD terminal description © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page4 Preliminary FT8260/1/2x Fremont Micro Devices No. PIN 1 GND 2 COMP FUNCTION Ground Internal EA’s output. This pin connects a capacitor to ground to stabilize the current control loop Zero current detection pin. A negative edge triggers the turn on signal of the internal MOSFET. Connecting this pin through a resistor divider from the auxiliary 3 ZCD winding to GND. Over-voltage condition is detected through ZCD. If ZCD voltage is higher than the over-voltage protection (OVP) threshold after a blanking time of 1us, the over-voltage condition is detected 4 CS 5,6 D 7,8 VCC Current sense pin. This pin connects a current sense resistor to GND D Internal power MOSFET drain Power supply Table1.3 FT8261/2DD terminal description ORDERING INFORMATION FT8260/1 60/1 1x- xx Circuit Type HSF and Packaging 8260: No Dimming RT: RoHS and T&R 8261: On/Off Dimming ming GT: Green and T&R Package Blank: SOT23-6 FT8260/1/2 x - x x x Circuit Type Typ HSF and Packaging 8260/2: No Dimming 8260/2 8260/ RB: RoHS and Tube 8261: On/Off Dimming 826 82 RT: RoHS and T&R GB: Green and Tube GT: Green and T&R Internal MOS Type B or DD Package Blank: SOP8 D: DIP8 © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page5 Preliminary FT8260/1/2x Fremont Micro Devices Part No. Dimming Method Integrated Power Package 30W SOT23-6 Remark MOS FT8260 N/A N/A FT8260B N/A 650V, 2A 7W SOP8 FT8260DD N/A 650V, 4A 18W DIP8 NRND FT8262DD N/A 650V, 4A 18W DIP8 RND FT8261 3-level On-Off Dimming N/A 30W SOT23-6 FT8261B 3-level On-Off Dimming 650V, 2A 7W SOP8 FT8261DD 3-level On-Off Dimming 650V, 4A 18W DIP8 Table 2 FT8260DD: Not Recommended for New Design FT8262DD: Recommended for New Design, pin to pin vs FT8261DD MARKING RULE FT8260B FT8260DD F Figure 3.1 1 FT8260x T8260x mark marki marking rule FT8261B FT8261DD Figure 3.2 FT8261x marking rule FT8262DD Figure 3.3 FT8262DD marking rule for internal reference © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page6 Preliminary FT8260/1/2x Fremont Micro Devices BLOCK DIAGRAM VCC 5 V O LT A G E RE GU LATO R U V LO + - O V P la tc h 19 V / 9 .6 V ZC D 6 In te r na l re fe ren c e & b ias VCC 13V Z ero c urre n t d ete c tio n S ta rte r L O G IC & D R IV E R - 4 GD 3 CS + 0.6 V /0 .4 V OTP & OSCP O V P L a tc h + P W M /P F C C o n tro l V re f Io E s tim a te COMP 1 Gm V re f O N /O O FF m m in g d im VCC (F T 82 61) 2 GND Figure igure 4.1 FT8260 FT8260/1 Block Diagram 7,8 VCC 4 V O LT A G E R E G U L A TO R UVLO + - Inte rna l refe re n ce & b ias VCC O V P latc h 19V /9.6 V ZCD 3 D 13 V ero ro cu rrent Zero dete e c tion S tarter LO G IC & D R IV E R + 0.6 V /0.4 V O TP & O S C P O V P L atch + P W M /P F C Co n trol COMP V ref Io E stim a te Gm 2 1 CS V ref O N /O F F dim m ing (FT 82 6 1 B /D D ) VCC 5,6 G ND Figure 4.2 FT8260/1B/0DD Block Diagram © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page7 Preliminary FT8260/1/2x Fremont Micro Devices 5,6 VC C 7,8 VO LTAG E REG ULATO R U VLO + - Internal reference & bias VCC O VP latch 19V/9.6V ZC D 3 D 13V Zero current detection Starter LO G IC & DRIVER + 0.6V /0 .4V O TP & O S CP O VP Latch + PW M /PFC C ontrol COMP Vref V reff Io E stim ate te 2 Gm 4 CS Vref O N/O F F dim m ing g (FT8261B/DD) 61B/D DD) VC CC C 1 G ND Figure 4.3 FT8261/2DD 261/2DD 2DD Block Diagram Di © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page8 Preliminary FT8260/1/2x Fremont Micro Devices ELECTRICAL CHARACTERISTICS (Tj = 25°C, VCC = 16V, unless otherwise specified) Symbol Parameter Test Condition Min Typ Max Unit SUPPLY VOLTAGE & SUPPLY CURRENT VCCon Turn-on threshold 19 V VCCoff Turn-off threshold 9.6 V VCCOVP VCC over voltage 24 V Istart-up Start-up current 23 uA Iq Quiescent Current 1.1 mA Iclamp VCC clamp current 3.5 .5 mA No switching ERROR AMPLIFIER VFB Feedback Input Voltage 0.4 V VCOMP Lower Clamp Voltage 0.9 V VCOMP_OVP OSCP COMP voltage 2.6 V 1.8 V 380 ns (1)) 0.4 V (1) 0.2 V 3.2 V us CURRENT SENSE COMPARATOR VCS max tLEB Over current protection voltage Leading Edge blanking time ZERO CURRENT DETECTOR VZCD_T VZCD_Hy VZCD_OVP Zero Current Detect threshold Zero Current Detect ct Hystestic ZCD over voltage ge e d threshold 1us delay after turn-off LOGIC tSTART Sta Timer Start Tim period rio 140 Toff_min Minimum off time tim 6.4 us Ton_max Maximum on o time 24 us 65 mA -160 mA GATE DRIVER (FT8260/1) (FT8260/ (FT8260 IGD-source ource Max Ma source current IGD-sink Max sink current Power MOSFET F (FT8260/1B) RDSON BVDSS IDSS IDMAX Static drain-source on resistance Drain-source breakdown voltage Drain-source leakage current Maximum drain current © 2014 Fremont Micro Devices Inc. VGS=10V,IDS=0.5A VGS=0V,IDS=250uA 4.5 650 V VGS=0V,VDS=650V Vd=3V Confidential Rev0.86 10 0.65 uA A DS8260/1/2x-A0-page9 Preliminary FT8260/1/2x Fremont Micro Devices Power MOSFET (FT8260/1/2DD) RDSON BVDSS IDSS IDMAX Static drain-source on resistance Drain-source breakdown voltage Drain-source leakage current VGS=10V,IDS=0.5A VGS=0V,IDS=250uA 2.3 650 V VGS=0V,VDS=650V Maximum drain current 10 uA Vd=3V 1.3 A On-off Dimming level 1 FT8261x 100 % On-off Dimming level 2 FT8261x 50 % On-off Dimming level 3 FT8261x 25 % Time interval of On-off FT8261x, R1=280k, Dimming C2=10uF, Rd=750k ON-OFF DIMMING (FT8261x) KDIM TONOFF TRESET Time interval of Shutdown FT8261x, R1=280k, 0k C2=10uF, Rd=750k 1.5 1 2.5 S S OVER TEMPERATURE PROTECTION OTP OTP shut down 150 OTP-hys OTP release 130 Table e3 ality tested in production. produ prod (1) Parameters guaranteed by design, functionality w design. n. (2) FT8260DD is not recommended for new © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page10 Preliminary FT8260/1/2x Fremont Micro Devices FUNCTIONAL DESCRIPTION Real Current Control FT8260/1/2x accurately regulates LED current by sensing the primary side information. The LED current can be easily set as following (refer to figure 1): 1 V FB N P I OUT * * 2 RS N S Where NP is the primary winding and NS is the secondary winding; VFB (=400mV) is the internal voltage reference and RS is the external current sensing resistor. Power Factor Correction F~2.2uF 2.2uF capacitor between b High power factor is achieved by constant on operation. By connecting a 1uF~2.2uF the ant on time is achieved ach achi COMP pin and ground, the COMP pin voltage is relatively constant, constant by simple circuit structure. Start Up During start-up process, VCC is charged through a start-up resistor. VCCon voltage, COMP esistor. or. As VCC reaches rea re pin is pre-charged by an internal circuit. After COMP reaches ches 0.9V and th the internal control loop is settled, a starter signal is sent to GD Pin to power up the converter. supplied by the auxiliary winding ter. r. The power is then th t once the voltage of the winding is high enough. The PW PWM M signal is shut down if VCC goes below VCCoff ed to ground. threshold voltage, COMP Pin is then discharged Line Compensation tantaneous antaneous mains mains voltage streams out CS pin. A compensation resistor An offset current proportional to instantaneous urr is added ad inversely proportional to the offset current between ZCD Pin and transformer auxiliary winding to nsat he compensation compe compe achieve excellent line compensation; the resistor can be adjusted externally. ng Zero current switching n when the transformer tran trans The IC is switched on is demagnetized after MOSFET’s minimum off time about 6.4us al circuitry connected connect to the ZCD pin detects the end of the secondary stroke. After MOSFET’s typically. Internal ff time, if no demagnetization demag minimum off signal is detected on the ZCD pin, the controller generates a startup ypically 140us after the last GD signal. signal typically ge Blan B Leading Edge Blanking (LEB) A turn on spike on CS pin will inevitably appear when the power MOSFET is switched on. At the beginning of each switching pulse, the current-limit comparator is disabled for around 380nsec to avoid premature termination. The gate driver output cannot be switched off during the blanking period. Output Over Voltage Protection (OUTOVP) Refer to figure 1, the voltage of ZCD pin is set by R2, R3 and auxiliary winding due to the coupling polarity between the auxiliary winding and the secondary winding of the transformer. Once the ZCD voltage exceeds 3.2V after a blanking time about 1us to allow the leakage inductance ringing fully damped, ZCD OVP is triggered, the IC stops switching, It can be reset by re-starting the voltage on pin VCC. © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page11 Preliminary FT8260/1/2x Fremont Micro Devices The OVP voltage can be adjusted by the equation: VOUT _ OVP 3.2 * (1 N R2 )* S R3 NVCC VDf Where NS is secondary winding, NVCC is the auxiliary winding, VDf is the forward bias voltage of the secondary diode. VCC Over Voltage Protection (VCCOVP) Once the VCC voltage exceeds 24V and last for about 6us, VCC OVP is triggered, the IC stops switching, VCC voltage will be pulled down. It can be reset by re-starting the voltage on pin VCC. It is recommended to set the VCC normal operating voltage between 11V and 22V. Output Short Circuit Protection Fop=7KHz), so the t When output short circuit detected, the system works at low frequency (Fop=7KHz), power oltage ge exceeds 2.6V, 2.6 the power consumption is low, meanwhile COMP pin voltage will rise. When COMP voltage age on pin VCC. VC VCC MOSFET will be shut down immediately. It can be reset by re-starting the voltage Over Current Protection FT8260/1/2x immediately turns off the power MOSFET once the he voltage at CS pin p exceeds 1.8V. This cycle by cycle current limitation scheme prevents the relevant components, omponents, such as power MOSFET, transformer, etc. from damage. Over Temperature Protection 260/1/2x 2x senses the th die temperature after start up. When the The thermal protection circuitry in the FT8260/1/2x temperature on die rises to 150 , the power er MOSFET w will be shut down immediately and will remain switched off until the temperature on die falls to 130 13 . ON-OFF-Dimming (For FT8261x only) nly) ly) Compare to Triac dimming,, ON-O ON-OFF dimming mmin is a simple and green solution to LED lighting applications. mming FT8261x enables three-level -level ON/OF ON/OFF dimming function with proper choice of VCC capacitor and discharge resistor Rd. By simplyy counting the number of wall switch toggling, the output power cycles through the 100%, num nu 50% and 25% settings, order. There are two parameters governing the ON/OFF action. If mains switch ttings, s, in that order is turned off and nd stays off for lo llonger than TRESET, the turning off is regarded as true turning-off action, hence any subsequent will output rated 100% power. If the wall switch is turned on and off or toggles in equent turning on w less than n TONOFF apart, th tthe output will go through 100%, 50%, 25% rated power levels and repeat the process. ca can be set by the VCC capacitor, C2 and the resistor between VCC and GND, Rd. Typical TRESET and TONOFF ON settings are given ven in Table 3. © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page12 Preliminary FT8260/1/2x Fremont Micro Devices SOT23–6 PACKAGE OUTLINE DIMENSIONS Symbol llimeters Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 1.050 1.2 1.250 0.041 0.049 A1 0.00 0.000 0.100 0.000 0.004 A2 1.050 1.150 0.041 0.045 b 0.300 0.500 0.012 0.020 c 0.100 0.200 0.004 0.008 D 2.8 2.820 3.020 0.111 0.119 E 1.500 1.700 0.059 0.067 E1 2.650 2.950 0.104 0.116 e 0.950 (BSC) 0.037 BSC e1 1.800 2.000 0.079 L 0.300 0.600 0.024 0° 8° © 2014 Fremont Micro Devices Inc. 0° Confidential Rev0.86 8° DS8260/1/2x-A0-page13 Preliminary FT8260/1/2x Fremont Micro Devices SOP8 PACKAGE OUTLINE DIMENSIONS Symbol Dimensions in Millimeters eters s Dimensions in Inches Mix Max ax Min Max A 1.350 1.750 0.053 0.069 A1 0.100 0.250 25 0.004 0.010 A2 1.350 50 1.550 1 1.5 0.053 0.061 b 0.330 0 0.510 0.013 0.020 c 0.170 0.17 0.250 0.006 0.010 D 4.700 00 5.100 0.185 0.200 E 3.80 3.800 4.000 0.150 0.157 E1 5.800 6.200 0.228 0.244 e L 1.270 (BSC) 0.050 BSC 0.400 1.270 0.016 0.050 0° 8° 0° 8° © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page14 Preliminary FT8260/1/2x Fremont Micro Devices DIP8 PACKAGE OUTLINE DIMENSIONS Symbol eters s Dimensions in Millimeters Dimensions in Inches Min Max ax Min Max A 3.710 4.310 0.146 0.170 A1 0.510 A2 3.200 00 3 3.6 3.600 6 0.126 0.142 B 0 0.380 0.570 0.015 0.022 B1 0.020 1.524 4 BSC 0.060 BSC C 0.204 04 0.360 0.008 0.014 D 9.000 9.400 0.354 0.370 E 6 6.200 6.600 0.244 0.260 E E1 7.320 7.920 0.288 0.312 e 2.540 (BSC) 0.100 BSC L 3.000 3.600 0.118 0.142 E2 8.400 9.000 0.331 0.354 © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page15 Preliminary FT8260/1/2x Fremont Micro Devices Fremont Micro Devices (SZ) Limited #5-8, 10/F, Changhong Building, Ke-Ji Nan 12 Road, Nanshan District, Shenzhen Tel: (86 755) 86117811 Fax: (86 755) 86117810 Fremont Micro Devices (Hong Kong) Limited #16, 16/F, Blk B, Veristrong Industrial Centre, 34-36 Au Pui Wan Street, Fotan, Shatin, Hong g Kong Ko Tel: (852) 27811186 Fax: (852) 27811144 Fremont Micro Devices (USA), Inc. 42982 Osgood Road Fremont, CA 94539 Tel: (1-510) 668-1321 Fax: (1-510) 226-9918 Web Site: http://www.fremontmicro.com/ * Information furnished is believed to be accurate and reliable. However, Fremont Micro Devices, Incorporated (BVI) assumes no responsibility for the consequences of use of such information or for any infringement of patents of other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Fremont Micro Devices, Incorporated (BVI). Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. Fremont Micro Devices, Incorporated (BVI) products are not authorized for use as critical components in life support devices or systems without express written approval of Fremont Micro Devices, Incorporated (BVI). The FMD logo is a registered trademark of Fremont Micro Devices, Incorporated (BVI). All other names are the property of their respective owners. © 2014 Fremont Micro Devices Inc. Confidential Rev0.86 DS8260/1/2x-A0-page16