AMS AS7221 User Manual - Page 9

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AMS AS7221 User Manual
AS7221
Smart Lighting Integration Kit (SLIK) User Guide
2.4

Configuring the AS7221 SLIK for PWM1 Digital Deep Dimming

•
Provide a VIN of 12V ±5%
As shown in the figure above, SLIK regulates the AC/DC LED Driver Aux output
o
Or, a 12V AC/DC wall brick converter (not shown above) could also be used in
o
place of the 12V LED Driver power. Connect to the 12V factory shipped AC/DC
power unit connection.
•
Set the AS7221 MODE pin resistor setting for 10V Digital PWM dimming (range is 1-100%,
enabling deep dimming).
3

AS7221 SLIK - Operation

When a SLIK-controlled luminaire is turned off by SLIK (via the Smart Lighting Command Interface,
SLIK dimming or SLIK occupancy sensor), the most recent color temperature target setting, LUX
target setting and dimming input level are saved. After power is restored (by SLIK control or AC/DC
power-up) the luminaire will begin operation at the stored levels.
Automatic SLIK Color Tuning Compensation
When automatic color tuning compensation is enabled, the PWM2 and PWM3 output controls are
slaved to the AS7221 color sensors. As changes to internal Luminaire light color is detected (or
color target changed by the Smart Lighting Interface) those outputs will be automatically adjusted to
maintain a constant CCT color.
White Color (XYZ) tuning can be enabled or disabled via commands from the Smart Lighting
Command Interface (serial UART), for example over Bluetooth from a Smartphone with the
appropriate SLIK application installed. Default for the SLIK is to be enabled.
ams Eval Kit Manual
[v3-2-02] 2016-Jan-02
Aux Voltage 12V
Page 9
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