AS7221 datasheet(21/56 Pages) OSRAM

21 / 56 page

Document Feedback

AS7221

Functional Description

Datasheet

• PUBLIC

DS000479

• v4-00 • 2019-Jun-28

│ 20

The AUX input is a multifunction pin that is configured via SLCS commands into one of several

modes. It can be used as a secondary input to allow additional control, in addition to the 0-10 V slider

dimming function of the DIM pin. In AUX mode, the sensed AUX voltage is scaled and used to multiply

the dimming scale. The auxiliary sensor input (AUX) has a 0-3 V range for its default analog sensing

mode. With this 0-3 V range, external ranges such as 0-10 V can be accommodated using external

resister divider networks such as a 10:3 network for a 0-10 V occupancy sensor. The AUX pin can

also be configured for digital sensing (0,1 where 1=VDD).

In the OCC mode an occupancy event from an external digital occupancy sensing device will trigger a

timer restart, enabling the occupancy sensing function. An occupancy event enables the PWM output

and resets the OCC timer. If the OCC signal falls below a detecting threshold (50%), the OCC timer

restarts a countdown. The OCC timer counting time is set by the ATOCCT command. A value up to 10

minutes can be stored. After finishing the countdown without an occupancy event re-occurring, the

PWM output is dimmed to 0 output (lights off).

In CCT_Tune mode, the analog pin input will be interpreted to linearly tune between min and max

CCT values that are set via smart lighting commands. In this mode, all lights on a single CCT-tuning

circuit will see the same CCT_Tune input value for light-to-light CCT consistency.

In CCT_SEL mode, a preselected CCT target value can be set via the provided voltage at the AUX

pin. The selected CCT target values will be configured in 300 mV step width.

Figure 16:

CCT_SEL Targets

CCT (K)

Vmin (mV)

Vnorm (mV)

Vmax (mV)

Default configured target value

150

300

2700

300

450

600

3000

600

750

900

3500

900

1050

1200

4000

1200

1350

1500

4100

1500

1650

1800

5000

1800

1950

2100

5700

2100

2250

2400

6500

2400

2550

2700

CT off

2700

2850

3000

If the AUX pin is not used, an external resistor pull-up connecting it to VDD is recommended.

7.4

Synchronization and Reset

AS7221 provides optional synchronization of the PWMs. This sync signal can be derived from the AC

mains to enable all luminaires in a room to be synchronized to prevent beat frequency flicker. If the

AS7221 数据表(PDF) 21 Page - OSRAM GmbH

AS7221 数据表(HTML) 21 Page - OSRAM GmbH

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

数据表下载

链接网址

AS7221 数据表(PDF) 21 Page - OSRAM GmbH

AS7221 数据表(HTML) 21 Page - OSRAM GmbH

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

数据表 下载

链接网址

数据表下载