Spesifikasi
Produsen: STMicroelectronics
Device Type: Transition Mode current-mode PFC pre-regulator controller IC, tape and reel surface mount packaged for AC-DC switching power supply front-end power factor correction circuits
Electrical Specifications
Operating supply voltage range: 10.5 V to 22.5 V
Maximum startup current: 60 μA
Typical steady-state operating current: below 5 mA
Totem-pole gate driver capability: 600 mA sourcing current, 800 mA sinking current
Internal voltage reference precision: 1% tolerance at 25°C junction temperature
Operating junction temperature range: -40 °C to +150 °C
Package outline: 8-pin narrow SOIC surface mount plastic package
Switching frequency works in CRM boundary conduction mode with variable frequency adjustment
Core Functional Features
The chip adopts proprietary linear multiplier circuit design, which effectively reduces AC input current total harmonic distortion. It maintains high power factor and low current distortion under wide input voltage range and varying load conditions, fully meeting international harmonic suppression standards.
Built-in two-stage hierarchical overvoltage protection mechanism. It suppresses transient overvoltage generated during power-on startup, and locks output safely once severe overvoltage occurs after load disconnection to avoid damage to peripheral electrolytic capacitors and power devices.
Ultra-low startup and quiescent power consumption helps power supply designs comply with global energy efficiency standards. A dedicated remote enable pin supports external on-off control of the chip, convenient for standby power consumption reduction and system power sequence management.
Digital leading-edge blanking circuit is integrated on the current detection pin to eliminate switching noise interference and ensure accurate peak current sampling. Under undervoltage lockout state, the gate driver pin actively pulls down voltage to prevent mis-triggering of external power MOSFETs.
Pin definition is fully compatible with earlier generation L6561 and L6562 chips, enabling direct replacement and hardware upgrade without circuit layout modification. All pins are equipped with internal electrostatic protection to adapt to industrial and consumer electronic power supply complex electromagnetic environments.
Skenario Aplikasi Umum
Front-end PFC circuits for LCD televisions, desktop computer mainframe power supplies
High-power AC adapters and battery chargers below 400W
LED driving power supplies and triac dimmable lighting power modules
Network communication equipment switching power supply pre-regulators
Audio equipment high-efficiency isolated power supply systems
General industrial control equipment AC-DC conversion power units
