OZ9997 назначение, описание, схема включения

Микросхема OZ9997, назначение- LED драйвер, Производитель- O2micro®

FEATURES OZ9997
• High power DC/DC boost converter controller
• Drives up to 8 LED strings in parallel
• External PWM dimming control
• Integrated LED current balance control circuit
• User-defi ned string selection
• Multi-chip parallel operation for more than 8 LED strings
• MOSFET over-current protection
• LED short circuit and open string protection
• Thermal protection
• LED fault status output

GENERAL DESCRIPTION OZ9997
The OZ9997 is a high effi ciency, DC/DC controller that drives up to eight (8) strings
of LEDs in parallel confi guration, with multiple LEDs in each string connected in
series.
The IC provides eight (8) LED current sense inputs in an “OR” confi guration to im-
prove backlight reliability. This allows the backlight to remain functioning in the event
that any string(s) is damaged during normal operation.
OZ9997 supports external Pulse Width Modulation (PWM) dimming control, and
provides an integrated circuit to balance the current fl ow through each LED string.

Схема включения

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OZ99XX O2Micro
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