OZ9908B, назначение, описание, схема включения
Микросхема OZ9908B, назначение- LED драйвер, Производитель- O2micro®
FEATURES OZ9908B
• Drives up to 6 strings of LEDs
• Up to 350mA LED current per string
• Supports multiple IC operation synchronization
• Boost drive outputs 180 degree phase-shift between master and slave ICs
• Analog dimming control
• Individual PWM dimming for each string
• Over-voltage and over-current protection
• LED open/short circuit protection
• LED fault status output
GENERAL DESCRIPTION OZ9908B
The OZ9908B is a high performance LED driver controller optimized for large screen
LED backlight LCD TV applications. It provides an integrated six channel LED current
regulation control circuit. Using external balance transistors for each channel, the IC
is capable of driving a current up to 350mA per LED channel.
OZ9908B provides 6 individual external Pulse Width Modulation (PWM) dimming
interfaces for its respective LED string. The IC is suitable for LCD TV applications
using a local-dimming control backlight.
When using multiple ICs, the operating frequency can be synchronized with a 180o
phase-shift between the drive outputs of each IC. These features greatly reduce the
interference between ICs.
Схема включения OZ9908B
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