OZ531 назначение, описание, схема включения

Микросхема OZ531, Производитель- O2micro®

FEATURES OZ531
• Current mode PWM Controller
• Built-in high voltage (500V) start-up circuit
• Low standby power meets Energy Star specifi cation
• Current mode control with frequency foldback under light-load condition
• Built-in synchronized slope compensation
• Drive current up to 500mA
• Leading-edge blanking at current sense
• Protections:
— Under-voltage lockout protection
— Clamped gate output voltage at 18V
— VDD over-voltage protection
— Cycle-by-cycle current limiting
— Output over-current and short circuit protection
— Thermal protection

GENERAL DESCRIPTION OZ531
The OZ531 is a highly integrated current mode Pulse Width Modulation (PWM) con-
troller that is ideal for offl ine AC/DC fl yback converter applications.
The controller operates at fi xed frequency of 100kHz. With a built-in high voltage
start-up circuit, OZ531 eliminates the power loss caused by start-up resistors. The
Driver outputs a soft-drive signal which reduces electromagnetic interference in the
converter system.

Схема включения OZ531

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