PT6912

PT6912C is an ultra-high-voltage linear constant-power driver IC designed for LED loads with high drive voltage and low current. The application circuit requires minimal external components with a compact layout, enabling simple and flexible integration into various small-form-factor or flat-panel LED products. The simple linear drive topology eliminates magnetic components, effectively avoiding EMI issues. PT6912C employs a patented closed-loop control scheme to achieve constant output current regulation, delivering excellent line regulation and load regulation. Within a specified input voltage range, the average output current is maintained constant, keeping output power constant and LED brightness stable. The ESOP8 package adds a line voltage sensing pin to achieve input constant-power operation. To prevent IC damage from overheating, PT6912C integrates an intelligent thermal control function. When the IC junction temperature rises to 135°C, PT6912C begins to reduce the output current; when the junction temperature reaches 155°C, the output current is reduced to zero. This eliminates the flickering issue associated with conventional over-temperature protection approaches.

Applications

• LED G9 lamp
• LED filament lamp
• LED bulb
• LED downlight
• LED panel light

Key features

• Closed-loop control, excellent line/load regulation
• 20V~400V operating voltage
• 120mA maximum peak output current
• ±5% output current accuracy
• Input/output constant power
• Multiple units parallel operation support
• High power factor
• High efficiency
• Minimal external components
• LED open/short circuit protection
• IS resistor open/short circuit protection
• Intelligent over-temperature protection
• TJ>135°C, output current begins to decrease
• TJ>155°C, output current reduced to 0
• TO252-5 package
• ESOP8 package (supports input constant power regulation)