OZ9967 назначение, описание, схема включения

Микросхема OZ9967, Производитель- O2micro®, назначение- LED драйвер

FEATURES OZ9967
• High frequency DC/DC boost converter controller
• Drives 6 LED strings in parallel
• Integrated LED current balance control circuit
• Up to 1MHz switching frequency
• External PWM or internal LPWM dimming control
• LED short circuit protection
• Over-current and over-voltage protection
• Soft start function

GENERAL DESCRIPTION OZ9967
The OZ9967 is an LED controller that drives up to six (6) strings of LEDs in parallel
confi guration, with multiple LEDs per string connected in series. It provides six (6)
LED current sense inputs in an “OR” confi guration to improve backlight reliability.
This allows the backlight to remain functioning in the event that any string (s) is dam-
aged during normal operation.
OZ9967 supports external Pulse Width Modulation (PWM) or internal Low frequency
PWM (LPWM) dimming control. Plus, it provides an integrated circuit to balance the
current fl ow through each LED string. The balance transistors are external to ac-
commodate different power dissipation resulting from the forward voltage difference
among the LED strings.

Схема включения

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