OZ9965 назначение, описание, схема включения
Микросхема OZ9965, Производитель- O2micro®
FEATURES OZ9965
• Integrated LED controller and two
(2) DC/DC converters
• User-defi ned operation frequency
• Wide input voltage range
• Thermal protection
• User-defi ned shutdown delay time
• LED fault status output
LED Controller
• User-defi ned boost topology or buck-
boost topology
• Current mode control
• Drives up to 4 strings of LEDs in parallel
• User-defi ned string selection
• Integrated LED current balance control
circuit
• External PWM dimming control
• LED open string and short circuit protection
• MOSFET over-current protection
LED Controller (cont.)
• Over load protection
• Output short circuit or open
diode protection
Boost Converter
• Current mode control
• Over-voltage protection
• MOSFET over-current
protection
• Over load protection
• Soft start function
General Purpose Converter
• User-defi ned negative buck-
boost or buck topology
• Voltage mode control
• Over-voltage and over-load
protection
• Soft start function
GENERAL DESCRIPTION OZ9965
OZ9965 is a wide input range multi-output power management controller for small
panel LCD applications. It controls the DC/DC power conversion from a single input
supply voltage to provide the power needed to drive an LED backlight module,
source drivers and gate drivers used in a LCD application.
OZ9965 includes a high power LED driver controller, a boost converter, and one
general purpose converter that can be confi gured into either a buck or negative
buck-boost converter. The LED driver supports external Pulse Width Modulation
(PWM) dimming, and can drive 3 or 4 LED strings, depending on the SEL pin voltage
setting.
Схема включения OZ9965
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