AMG-LL9910B Datasheet, PDF (1/15 Pages) alpha microelectronics gmbh – Universal High Voltage Single Channel LED Driver

AMG-LL9910B
Universal High Voltage Single Channel LED Driver
1. Functional Description of the AMG-LL9910B
The AMG-LL9910B is a universal high voltage LED driver IC. Both buck and boost topologies
are possible. It has one current regulated channel.
The AMG-LL9910B controls an external MOSFET at fixed switching frequencies up to
300 kHz. The frequency can be programmed by using a single resistor. The LED string is
driven at a constant current rather than a constant voltage, thus providing constant light output
and enhanced reliability. The output current to a LED string can be programmed to any value
between 0 and 100% by applying an external control voltage at the linear dimming control
input. The IC provides a low-frequency PWM dimming input that can accept an external
control signal with a duty ratio between 0% and 100% and a frequency of up to a few
kilohertz.
2. Features
 Supply voltage 8VDC … 450VDC
 >90 % efficiency
 8 – 450V input voltage
 Peak current mode converter
 Linear and PWM dimming capability
 Buck and Boost topology
 Pin compatible with other HV LED drivers
 SOP8 Package with exposed pad for a lower thermal resistance
3. Application
The AMG-LL9910B is suitable for:
 DC/DC or AC/DC LED driver applications
 LED backlighting
 General-purpose LED lighting
 General-purpose constant current source
 Battery chargers
AMG-LL9910B Revision: B
09/13/12
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