OZ964 PDF – Phase-Shift PWM Controller

Part Number: OZ964

Function: Phase-Shift PWM Controller

Package: DIP, SSOP 20 Pin Type

Manufacturer: O2Micro

Images:OZ964 pdf controller


A phase-shift PWM (Pulse-Width Modulation) controller is an electronic device used in power electronic circuits to regulate the output voltage or current by controlling the timing and duration of the switching pulses. It is specifically designed to provide precise control and regulation in applications such as power supplies, motor drives, and other power conversion systems

OZ964 is a high efficiency, Pulse Width Modulation (PWM) controller designed for both
DC/DC and DC/AC high-voltage applications. The average current mode control is suitable for
DC/DC converters where both voltage and current feedback are required, as well as for Cold
Cathode Fluorescent Lamp (CCFL)_ backlight applications for small and large Liquid Crystal
Displays (LCD).

OZ964 operates in a zero-voltage switching mode that minimizes electromagnetic interference (EMI). In addition, OZ964 achieves a high power-conversion efficiency resulting in a lower operating temperature and higher system reliability.

OZ964 supports a wide input voltage range and provides a constant, user-defined, operating frequency, ensuring that the CCFLs operate at a fixed frequency. This eliminates interference among CCFLs and the LCD panel. Interference causes electromagnetic compatibility (EMC) problems and may create visual effects (waterfall) on LCD panels. The controller provides a phase-shift square wave output that is
able to drive a full bridge power train.


OZ964 pinout datasheet


• Controller for high-voltage DC/DC and DC/AC converters

• High efficiency, zero-voltage switching

• Supports wide input voltage range

• Constant operating frequency

• Built-in PWM dimming control with wide dimming range

• Soft start function

• Built-in intelligence for ignition and normal operation of CCFLs

• Built-in open-lamp protection and over-voltage protection

• Shutdown delay for input voltage brownout condition

• Built-in under-voltage lockout protection

• Toggle pin to reset the IC after shutdown

• Low stand-by power

OZ964 PDF Datasheet