LD7830GR

LD7830 8/17/2012 High Power Factor Flyback LED Controller with HV Start-up REV: 01a General Description Features The LD7830 is a HV start-up Flyback PFC controller,  High voltage (600V) startup circuit specially designed for LED lighting appliances. It operates  High Power Factor Flyback PFC controller in transition(TM) mode and integrates with complete  High-efficiency Transition mode operation protections required for safety and therefore it’s an  Wide UVLO (16Von and 7.5 Voff) excellent solution to minimize the components counts.  VCC OVP (Over Voltage Protection) Those make it ideal for cost- effective applications.  OLP (Over Load Protection)  OCP (Cycle by cycle current limiting) Vcs=0.5V  Internal OTP (Over Temperature Protection) With HV start-up technology, high power factor and TM control, the start-up time and resistor loss could be  500/-800mA Driving Capability  Internal OTP function minimized efficiently. The circuit can easily achieve PF>0.90 to meet most of the international standard requirements. Applications With completed protection built inside this IC, such as  LED Power Supply over voltage protection (OVP), over current protection  Flyback PFC Power Supply (OCP), over load protection (OLP), over temperature protection (OTP), and short circuit protection (SCP), It enable the circuit to meet most safety requirements either in normal and abnormal test. Typical Application LF1 AC Input EMI Filter LED+ C1 LED- HV VCC GATE CS LD7830 COMP GND ISEN VSEN 1.25V ZCD 0.1V LD8105 IREF GND VCC OUT LED+ 1 Leadtrend Technology Corporation LD7830-DS-01a August 2012 www.leadtrend.com.tw LD7830 Pin Configuration VCC OUT HV NC VCC OUT SOP-8 / DIP-8 (TOP VIEW) HV SOP-7 (TOP VIEW) 8 6 5 8 7 6 5 TOP MARK YYWWPP YYWWPP YY: WW: PP: Year code Week code Production code GND CS 2 3 4 YYWWPP ZCD GND CS COMP 1 COMP 2 3 4 YYWWPP ZCD 1 TOP MARK Ordering Information Part number Package Top Mark Shipping LD7830 GR SOP-7 LD7830GR 2500 /tape & reel LD7830 GS SOP-8 LD7830GS 2500 /tape & reel LD7830 GN DIP-8 LD7830GN 3600 /tube /Carton The LD7830 is green packaged. Protection Mode Part number VCC OVP OLP LD7830 Auto recovery Auto recovery Pin Descriptions Pin NAME FUNCTION 1 ZCD 2 COMP 3 CS 4 GND Ground 5 OUT Gate drive output to drive the external MOSFET 6 VCC Power source VCC pin 7 NC Quasi resonance detector and programmable maximum ON-time. Feedback pin. Connect a photo-coupler to close the control loop to achieve regulation. Current sense pin, connect it to sense the MOSFET current for OCP No connecting. Connect this pin to positive terminal of main bulk cap to provide startup current 8 HV for controller. Once Vcc is UVLO on, the HV loop will open and turn off internal current source to minimize the power loss. 2 Leadtrend Technology Corporation LD7830-DS-01a August 2012 www.leadtrend.com.tw LD7830 Block Diagram VCC HV HV Regulator 6.5V PDR VCC OVP UVLO 26V VCC OK internal bias & Vref All Block 16V/7.5V Vref OK VCC OVP S PG Driver Stage Q OLP PG R OUT Zero ON Time Start Timer 0.1V/0.2V Fmax limit ZCD Blanking ZCD S Q PWM Comparator R OCP Comparator Vref Leading Edge Blanking Ramp generator ZCD COMP 0.5V Zero ON Time Zero ON Time PDR 0.80V OLP S OLP delay 4.8V PG 1/ 4 Counter GND 3 Leadtrend Technology Corporation LD7830-DS-01a August 2012 www.leadtrend.com.tw R Q CS LD7830 Absolute Maximum Ratings Supply Voltage VCC -0.3 ~30V High voltage pin, HV -0.3~600V OUT -0.3 ~VCC +0.3V COMP, CS, ZCD -0.3 ~6V Maximum Junction Temperature 150C Operating Junction Temperature Range -40C to 125C Operating Ambient Temperature Range -40C to 85C Storage Temperature Range -65C to 150C Package Thermal Resistance (SOP-8, SOP-7 JA) 160C/W Package Thermal Resistance (DIP-8, JA) 100C/W Power Dissipation (SOP-8, SOP-7, at Ambient Temperature = 85C) 250mW Power Dissipation (DIP-8, at Ambient Temperature = 85C) 400mW Lead temperature (Soldering, 10sec) 260C ESD Voltage Protection, Human Body Model (except HV pin) 2.5KV ESD Voltage Protection, Machine Model 250V ESD Voltage Protection, Human Body Model (HV pin only) 1KV Caution: Stresses beyond the ratings specified in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Recommended Operating Conditions Item Vcc pin capacitor Comp pin capacitor Min. Max. Unit 4.7 47 F 1 10 F 4 Leadtrend Technology Corporation LD7830-DS-01a August 2012 www.leadtrend.com.tw LD7830 Electrical Characteristics (VCC=15.0V, TA = 25C unless otherwise specified.) PARAMETER CONDITIONS MIN TYP MAX UNITS VCC=4V , HV=80V 1.0 1.3 1.6 mA VCC=9V,HV=80V 2.6 3.1 3.6 mA 35 A 95 A High voltage Supply(HV Pin) High-voltage current Source Off-state Leakage current VCC>UVLO(ON), HV=500V 0 VCC