OZ9976 Ver la hoja de datos (PDF) - Unspecified
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OZ9976 Datasheet PDF : 31 Pages
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OZ9986/86A
FEATURES
• OZ9986: Boost and buck converter
• OZ9986A: Buck converter
• High efficiency DC/DC converter controller
• Drives up to 6 strings in parallel; number of LEDs in series limited by external
MOSFET rating
• Supports up to 3 phase-shift drive outputs for boost converter
• High efficiency switching mode LED current balance
• User selectable phase-shift PWM dimming function with 3, 4, 5 and 6 phases
• PWM dimming control signals synchronized with external signal
• Over-voltage and over-current protection
• Soft start function
GENERAL DESCRIPTION
OZ9986/86A are high efficiency, DC/DC controllers that drive up to six (6) strings
connected in parallel configuration with multiple LEDs in each string connected in
series. They are targeted for large-size monitor and TV applications.
They provide six (6) LED current sense inputs in an “OR” configuration to improve
backlight reliability. This allows the backlight to remain functioning in the event that
any string (s) is damaged during normal operation.
OZ9986/86A support internal Pulse Width Modulation (PWM) dimming control. Plus,
each provides an integrated circuit to balance the current flow through each LED
string.
APPLICATIONS
• LCD Monitor
• LCD TV
APPLICATION DIAGRAMS
OZ8020
FEATURES
• Controller for high brightness LEDs
• Supports up to 400V DC
• User-defined constant current control
• Supports LED current up to 100mA
• Thermal protection
GENERAL DESCRIPTION
OZ8020 is a linear LED driver for general lighting applications. It requires a minimum
number of external components to operate, while providing application flexibility to
accommodate different system requirements. For application flexibility, the device
can be connected at either the anode or cathode terminal of the LED string.
OZ8020 operates in constant current mode, and the LED current is user-defined
through an external resistor.
APPLICATIONS
• General Lighting
APPLICATION DIAGRAM
U.S. Patent #7,498,793; 7,847,783; and more patents pending.
Patents pending.
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