OZ9976 Ver la hoja de datos (PDF) - Unspecified
Número de pieza
componentes Descripción
Fabricante
OZ9976 Datasheet PDF : 31 Pages
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OZ9960
FEATURES
• High frequency DC/DC boost converter controller
• Integrated power MOSFET
• Supports low input voltage
• Up to 200mA LED current
• External PWM dimming
• Open LED protection
• MOSFET over-current protection
• Soft start function
GENERAL DESCRIPTION
OZ9960 is a high efficiency DC/DC boost converter controller that drives a string
of LEDs connected in a serial configuration. It is ideal for small and mid-size LCD
backlight applications.
OZ9960 supports a wide input range and constant, user-defined operating frequency
for a single string LED application. It receives an external Pulse Width Modulation
(PWM) signal for dimming control.
APPLICATIONS
• Notebook/Netbook Computer
• GPS
• PND
APPLICATION DIAGRAM
OZ9979
FEATURES
• High efficiency DC/DC boost converter controller
• Drives up to 6 strings in parallel
• Enhanced dimming resolution
• Supports 6 equal-delay PWM dimming signals
• Integrated power MOSFET
• Integrated LED current balance control circuit
• Supports external, internal PWM and analog dimming
• PWM dimming frequency synchronized with external signal
• MOSFET over-current protection
• Over-voltage protection
• LED short circuit detection
• Output short circuit/open diode protection
• Thermal protection
• Soft start function
GENERAL DESCRIPTION
OZ9979 is a high efficiency, DC/DC controller that drives up to six strings of LEDs
connected in parallel configuration; with multiple LEDs in each string connected in
series. It is targeted for notebook backlight applications.
The IC provides six (6) LED current sense inputs in an “OR” configuration for im-
proved backlight reliability. This allows the backlight to remain functioning in the
event that any string (s) is damaged during normal operation.
APPLICATIONS
• Notebook Computer
APPLICATION DIAGRAM
Patents pending.
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U.S. Patent #7,498,793; 7,847,783; and more patents pending.
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