CS1630 datasheet(21/56 Pages) APEX

21 / 56 page

CS1630/31

DS954F2

scale output LED current ILED, as shown in Figure 22.

Figure 22. eOTP Temperature vs. Impedance

Beyond this temperature, the IC shuts down using the

mechanism discussed above. If the external overtemperature

protection and the temperature compensation for CCT control

features are not required, connect the eOTP pin to GND using

a 50k

 to 500k resistor to disable the eOTP feature.

5.10 Power Line Calibration

The CS1630/31 integrates power line calibration technology

within the controller to enable calibration and end-of-line

programming without the need for an additional electrical

connection, as shown in Figure 23.

Figure 23. Power Line Calibration Block Diagram

The power line calibration uses a phase-cut mechanism for

data generation and return-to-zero data encoding to eliminate

the need for clock synchronization. A code /command can be

created by using the combination of input phase angles, as

detailed in "Power Line Calibration Characteristics" on page 9.

When an initial program mode command has been detected,

the controller will begin to enter calibration mode. After key

parameters of the lighting system have been characterized

and programmed, a burn-in code plus an end-program mode

command is transmitted, instructing the controller to exit the

calibration mode. Power line calibration and end-of-line

programming

requires

human

intervention.

The

CS1630/31 provides registers that allow up to three attempts

for LED output current trimming over power line calibration.

Six registers store the three optional color control system

calibration values for channel 1 color calibration and channel

2 color calibration. For more detail regarding color calibration,

see "Channel 1 Color Calibration 3A (CH1_CAL3A) – Address

119" on page 51 through "Channel 2 Color Calibration 3C

(CH2_CAL3C) – Address 126" on page 53.

5.10.1 Power Line Calibration Specification

To ensure the success of phase detection, the angle for each

bit is specified as shown in "Power Line Calibration

Characteristics" on page 9. The CS1630/31 power line

calibration system operates under universal line voltage and

frequency with a leading-edge, phase-cut waveform.

Temperature (°C)

125

50%

100%

eOTP Trips and

Shuts Off Lamp

Power Supply

LED Lamp

with

CS1630/31

Photodetector

Light

Measurement

Light

Calibrator

Line

Neutral

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