ams Datasheet

Page 19

[v1-00] 2017-Feb-16

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AS7220 − Application Information

Schematics

Figure 21:

LED Chromatic Color and Lumen Maintenance with Daylighting

Note(s):

1. Mechanically, the AS7220 is inward luminaire looking for color tuning and the ams TSL4531 is outward luminaire looking to support

Daylighting.

2. The I²C port expanders and dip switches are only needed to allow field setting of desired Color and Lumen Maintenance values. The

port expanders are not needed if a one time setting of maintenance values when the luminaire is manufactured is desired, as one

time settings can be made in the external flash memory at the time of flash programming.

3. Refer to the AS7220 User Guide for detailed design and general information regarding Lumen and CCT maintenance.

Application Information

100nF

Occupancy

Sensor

DAY_EN

GND

LED_IND

SCK

CSN_EE

MISO

MOSI

VDD VDDHV

AS7220

10uF

3.3V

Flash

Memory

3.3V

MODE

AUX

LDIM_MAX

0_10V_DIM

0..10V

Dimmer

PWM_2

PWM_3

12V

AC

PWM_1

Constant Current

LED Driver

Dimming

Control

SDA_M

ams

TSL4531

SCL_M

I

2C Port

Expander

I

2C Port

Expander

I

2C Port

Expander

Dip

Switches

Dip

Switches

Dip

Switches

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