H6850S Datasheet | Hi-Sincerity

HI-SINCERITY MICROELECTRONICS CORP. Spec. No. : IC200912 Issued Date : 2009.07.15 Revised Date : Page No. : 1/13 H6850 Series Novel Low Cost Green-Power PWM Controller With Low EMI Technique Feature Low Cost, PWM&PFM&CRM (Cycle Reset Mode) z Low Start-up Current (about 3μA) z Low Operating Current (about 1.2m A) z Current Mode Operation z Under Voltage Lockout (UVLO) z Built-in Synchronized Slope pensation z Built-in Low EMI Technique z Programmable PWM Frequency z Audio Noise Free Operation z Leading edge Blanking on Sense input z Constant output power limiting for universal AC input Range z SOT-23-6 L 、SOP8 and DIP-8 Pb-Free z z z Packaging Good Protection Coverage With Auto Self-Recovery patible with SG6848 (6849) / SG5701/SG5848/LD7535 (7550) / OB2262 (2263)/OB2278（2279） plete Protection with Soft Clamped GATE output voltage 18.0V VDD over voltage protect 34.0V Cycle-by-cycle current limiting Output SCP (Short circuit Protection) Output OLP (Over Load Protection) High-Voltage CMOS Process with ESD Standby Power Supplies Set-Top Box Power Supplies 384X Replacement z ¾ ¾ ¾ ¾ ¾ ¾ Applications z z z Switching AC/DC Adaptor Battery Charger Open Frame Switching Power Supply z z z General Description The H68 50 is a highly integrated low cost current mode PWM controller, which is ideal for small power cur rent mode of of fline AC-DC fly- back converter applic ations. Making use of external resistors, the IC changes the operating frequency and automatically enters the PFM/CRM ( Cycle Reset Mode) und er light-load/zer o-load conditions. This can minimize standby power consumption and achieve powe rsaving functions. With a very lo w st art-up current, the H685 0 could use a large value start-up resistor (2MΩ). Built-in synchronized slo pe pens ation enhances the st ability of the syste m and avoids sub-harmonic oscillation. D ynamic peak current limiting circuit minimizes output power chang e caused by delay time of the system over a universal AC input...