FT839NB1-RT

Preliminary FT839NX/839MX Fremont Micro Devices High Efficiency Off-Line CC/CV Switch DESCRIPTION FEATURES Constant-Current (CC) and The FT839NX/FT839MX controller device is Constant-Voltage (CV) with Primary Side optimized for high-performance, low power Control switching mode power supply applications. The Proprietary technology enabling high C/CV charger FT839NX/FT839MX facilitates CC/CV efficiency and fast dynamic response -coupler pler and TL431. design by eliminating an opto-coupler Satisfy DoE Level 6 requirements from Its highly integrated functions ctions such as Under U 5V/1A to 5V/2.4A applications Voltage Lockout (UVLO), O), ), Leading Edge Blanking B No audible noise over entire operating (LEB) and built-in cable compensation offer the compensatio compensa range users a high efficiency fficiency ncy and low co ccost solution for Optimization for capacitive loading AC/DC power wer applications. pplicatio Built-in power NPN/MOS Built-in Cable Compensation Power FT839NX/FT839MX er supplies upplies built with w Built-in Line Compensation can both highest average efficiency an achieve bot h Primary-side feedback eliminates fast dynamic load lo response and super low opto-coupler and TL431 power. FT839NX and FT839MX satisfy standby pow po Cycle-by-Cycle Current Limiting 6 requirements with production DoE Level Le Lev Over Temperature Protection margin from 5V/1A to 5V/2.4A applications, margi rg VCC Over Voltage Protection respectively. re CV Open-loop Protection Excellent capacitive loading g start-up start ta -up Furthermore, FT839NX/FT839MX features performance fruitful protections like Open Circuit Protection and Over Temperature Protection to eliminate TYPICAL APPLICATION ATIO ATION the external protection circuits and provide Adapter/Charger Charger ger for Cell/Co Cell/Cordless Phones, P PDAs,, MP3 and Other Portable Apparatus Standby tandby and Auxilia Auxiliar Auxiliary Power Supplies reliable operations. FT839NX is available in SOP8/DIP8 package. FT839MX is available in SOP8 package. (STB) Set Top Boxes ((S Adapter apter for ADSL apte A / WiFi Wireless AC/DC C LE LED Driver applications © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page1 Preliminary FT839NX/839MX Fremont Micro Devices TYPICAL APPLICATION CIRCUIT Figure 1.1: FT839NX 39NX Typical Application App Ap Circuit Vo + AC INPUT + + Vo - + VCC D FT839MX FB CS GND Figure 1.2: FT839MX Typical Application Circuit © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page2 Preliminary FT839NX/839MX Fremont Micro Devices ABSOLUTE MAXIMUM RATINGS . . -0.3V to +7V .....-0.3V to +7V VCC -0.3V to +30V C . D -0.3V to +700V -0.3V to +650V -40 Storage Temperatu to +125 -40 0 to +150 -60 to +150 .200V ximum Ratings Rating are stress *Stresses exceeding Maximum Ratings may damage the device. Maximum ed Operating perating Con ratings only. Functional operation above the Recommended Conditions is not implied. Extended exposure to stresses above the Recommended mmended nded Operatin Operating Opera Conditions may affect device reliability. © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page3 Preliminary FT839NX/839MX Fremont Micro Devices PIN CONFIGURATION Figure 2: Pin Assignments TERMINAL DEFINITION Pin Name 1 CS Primary current sense 2 FB Output voltage feedback pin 3 GND Ground. 4 VCC Supply voltage NC No connection 5 6 7 8 C or D Description C: the Collector of the D: the Drain of the power MOS for e power wer NPN for fo FT839NX; FT T FT839MX. This pin n is connected to the th primary lead of the transformer Table 1 Tab © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page4 Preliminary FT839NX/839MX Fremont Micro Devices ORDERING INFORMATION FT839X X X X - XX Circuit Type HSF and Packaging M: MOS RB: RoHS and Tube N: NPN RT: RoHS and T&R GB: Green and Tube Internal MOS/NPN Type GT: Green and T&R &R A or B or D mp Cable Comp Package 0: 0% Blank: SOP8 1: 3% D: DIP8 2: 6% % 3: 9% FT839NX /FT839MX Device DESIGNATOR SYMBOL Options 0 Cable Comp = 0% 1 Cable Comp = 3% FT839NDD 2 Cable Comp = 6% FT839MB 3 Cable Comp = 9% FT839NA FT839NB FT839ND Table 2 MARKING RULE LE E Figure 3: Marking Rule : Represents Version (0, 1, 2 or 3) : for internal reference © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page5 Preliminary FT839NX/839MX Fremont Micro Devices Block Diagram VCC OTP Vcc_on/Vcc_off 16.2/5.5V FB_open Detector FB COMP 0.1V pfm EA 2.9V POR UVLO S Q POR Tons Tons CC Detector Controller R Internal reference &bias C S CV Controller C Q R Vcab Tons Cable compensation &Ipeak control S Driver Q LEB COMP R CS CS Vline Line Compensation GND G Figure 4.1: FT839NX Block B Blo Diagram VCC OTP Vcc_on/Vcc_off 16.2/5.5V FB open FB_open Detector FB COMP P 0.1V 0.1 1V pfm EA 2.9V 2 9 POR UVLO S Q POR Tons Tons CC Detector Controller R Internal reference &bias D S CV Controller D Q R Vcab Tons Cable compensation &Ipeak control S Driver Q LEB COMP R CS CS Vline Line Compensation GND Figure 4.2: FT839MX Block Diagram © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page6 Preliminary FT839NX/839MX Fremont Micro Devices ELECTRICAL CHARACTERISTICS (For typical values Tj=25 , Vcc=12V, unless otherwise noted) Characteristic Symbol Min Typ Max Unit Vcs_max 541 552 563 mV Tleb 350 400 450 ns 200 ns Current Sense Maximum Current Threshold Leading Edge Blanking Duration Propagation Delay Tpd (OUT=1.0nF to GND) Secondary Dutycycle Secondary Maximum Dutycycle Ds_max 47 % Feedback Section Feedback Voltage Threshold Vfb CCM protection Threshold Level Vcp 2.856 2.9 2.944 100 V mV Supply Section Start Up Threshold Voltage Vcc_on 15.5 15 5.5 5 16.2 16.2 17.5 V Under Voltage Lockout Voltage Vcc_off 5.2 5.5 5 6.0 V VCC Start Up Current Istart_up up 2 5 uA Operating Current Iop p 0.4 0.5 0.7 mA Feedback Loop Open Protection Ifb_open 90 115 140 uA VCC Over Voltage Protection Vcc_OVP 26 27 28 V Over Temperature Protection T_OTP T_OT 40 mV Protection Section 145 Compensation Line Compensation (Ifb=1mA) Vline 25 0 Cable 1 compensation 2 33 0 3 Kcab % 6 3 9 Power NPN PN N Section ((FT839NX) FT8 FT83 Characteristic acteristic Collector-Base lecto -Base lector Bas breakdown own voltage voltag Collector-Emitter Em breakdown voltage Emitter-Base breakdown voltage Collector-Emitter saturation voltage Base-Emitter saturation voltage Test T condition Symbol Min Ic=0.1mA Vcbo 700 V Ic=1mA Vceo 400 V IE=0.1mA Vebo 9 V IB=0.25A,IC=1A VCEsat 0.3 0.9 V IB=0.25A,IC=1A VBEsat 0.9 1.2 V Maximum collector © 2016 Fremont Micro Devices Inc. FT839NA Icm 0.39 Confidential Rev0.90 Typ Max Unit A DS839NX/MX-A0-Page7 Preliminary FT839NX/839MX Fremont Micro Devices current FT839NB 0.40 FT839ND 0.70 FT839NDD 0.80 Power MOS Section (FT839MB) Static drain-source on-resistance Drain-source breakdown voltage Drain-source leakage current Maximum Drain Current RDS_ON BVDSS IDSS VGS=10V, 4.5 IDS=0.5A VGS=0V, IDS=250uA 650 VGS=0V, 10 VDS=650V IDMAX V 0.65 uA A Table 3 © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page8 Fremont Micro Devices Preliminary FT839NX/839MX FUNCTIONAL DESCRIPTION Operating Description FT839NX/FT839MX is a cost effective and high-performance AC-DC power supply controller for off-line low power AC-DC applications including battery chargers, adaptors and LED lighting. The constant voltage (CV) and constant current (CC) control are achieved accurately without the secondary feedback circuit. Start up Control resistan and Start-up current of FT838NX/FT839MX is very low so that a start-up resistor with high resistance e value startup resistor res low-wattage is allowed to supply the start-up power for the controller. The large cial al fast startup tech tec minimizes the power loss in operations and allows quick start up. With a special technology, FT839NX/FT839MX starts up easily in capacitive loading applications. Operating current uA. Good efficiency efficien is achieved with the The operating current of FT839NX/FT839MX is as low as 500uA. cap ca low operating current. Low operating current also reduces the Vcc hold-up capacitance requirement. Constant voltage (CV) and constant current (CC)) Operation The FT839NX/FT839MX can accurately achieve characteristic output without secondary side e CV/CC CC character charac voltage and current-feedback circuits. It operates to regulate the output voltage by perates tes in CV mode m mo capturing the auxiliary winding feedback voltage age at FB pin. pin The auxiliary winding feedback voltage is proportional to secondary winding, so the feedback signal from secondary side o it provides ovides controller contro contr and achieves constant-voltage output. utput. In CC mode, mode the controller detects the secondary discharger peak current and the discharger determines the off-time of the base driver to make the er time, which det output average current constant. sta Primary peak current ent nt modulatio modulation Primary peak current at constant current mode. And primary peak current is modulated at rrent rent is constant a constant voltage age mode for the purposes of good dynamic load response and no audible noise over entire operating According to the output loading current the current threshold voltage is erating range. Ac modulated lated from 0.55V to 0.27V. The current threshold voltage is 0.55V at rated load and 0.27V at light load. Leading edge ge blanking Each time the power NPN or MOS transistor is switched on, a turn-on spike occurs at the sense resistor. To avoid premature termination of the switching pulse, a 400ns leading edge blanking time is built in. Conventional RC filtering can therefore be omitted. During this blanking period, the current limit comparator is disabling and cannot switch off the base driver. Under voltage lockout (UVLO) FT839NX/FT839MX turn-on Vcc_on and turn-off Vcc_off are 16.2 V and 5.5 V, respectively. During start-up, the hold-up capacitor must be charged to 16.2V through the start-up resistor. The hold-up capacitor continues to supply Vcc until power can be delivered from the auxiliary winding of the © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page9 Fremont Micro Devices Preliminary FT839NX/839MX transformer. Vcc must not drop below 5.5 V during this start-up process. This UVLO hysteresis window ensures that hold-up capacitor is sufficient to supply Vcc during start-up. Protection control With rich protection features of FT839NX/FT839MX, excellent power supply system reliability can be achieved. The protection features include cycle by cycle current limiting, Vcc over voltage protection and clamp, over temperature protection, feedback loop open circuit protection and Vcc under voltage lockout, etc. Integrated NPN/MOS Power NPN/MOS is integrated in FT839NX/FT839MX for low cost and/or space ce limited applications, applicat respectively. Output cable compensation The output cable compensation provides a constant output voltage cable over the age at the he end of the t entire load range in constant voltage mode. As the converter load increases from fro no-load to the peak current load, the voltage drop introduced across the output compensated by increasing the put cable is compe feedback pin reference voltage. © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page10 Preliminary FT839NX/839MX Fremont Micro Devices SOP8 PACKAGE OUTLINE DIMENSIONS SOP8 Package Symbol ons In Millimeters Millim Milli Dimensions Dimensions In Inches Min Max Min Max A 1.350 50 1.750 0.053 0.069 A1 0.100 0.250 0.004 0.010 A2 2 1.350 1.550 0.053 0.061 b 0.330 0 0.510 0.013 0.020 c 0.170 0.250 0.006 0.010 D 4.700 5.100 0.185 0.200 E 3.800 4.000 0.150 0.157 E1 E 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° © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page11 Preliminary FT839NX/839MX Fremont Micro Devices DIP8 PACKAGE OUTLINE DIMENSIONS © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page12 Preliminary FT839NX/839MX Fremont Micro Devices Fremont Micro Devices (SZ) Limited #5-8, 10/F, Changhong Building, Ke-Ji Nan 12 Road, Nanshan District, Shenzhen, Guangdong 518057 Tel: (86 755) 86117811 Fax: (86 755) 86117810 Fremont Micro Devices (Hong Kong) Limited tin, Hong Kong Ko #16, 16/F, Blk B, Veristrong Industrial Centre, 34-36 Au Pui Wan Street, Fotan, Shatin, 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 n 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. © 2016 Fremont Micro Devices Inc. Confidential Rev0.90 DS839NX/MX-A0-Page13