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2016-09-12

PIR CONTROLLER

FOR DC/AC APPLICATIONS

PIR CONTROLLER

M7621

一華半導體股份有限公司

MOSDESIGN SEMICONDUCTOR CORP.

FUNCTION DESCRIPTION

Power-up Mode

After the device powers on it first enters a warm-up period. The light is switched on for the selected on-time duration. The CDS

input is ignored on power-up, to allow the user to verify the installation during daylight conditions.

Trigger Condition

The SENS threshold (refer to Table 1) is multiplied with the TCOMP factor (refer to Table 2), to obtain a temperature dependent

threshold. When the filtered PIR signal exceeds this threshold, a trigger condition occurs.

Conditions for Switching the Light ON

If a trigger condition occurs and the CDS input is high, the light will be switched on.

The light’s brightness will increase to the selected brightness within the selected fade time.

The RELAY output is activated at the start of the fading on cycle.

The light and the relay will remain on for the duration set by the ON-TIME input.

Conditions for Switching the Light OFF

The light is switched off softly after the selected on-time has elapsed, or if the CDS input senses a low voltage. The light’s

brightness will reduce to zero within the selected fade time. The RELAY output is switched off at the start of the fading-off cycle.

Pin voltage

On time

Fade time

SENS Distance

(13/32) xVDD ≤Vin＜(15/32) xVDD

38.4 min

4.0 sec

(11/32) xVDD ≤Vin＜(13/32) xVDD

19.2 min

3.5 sec

(9/3)2 xVDD ≤Vin＜(11/32) xVDD

9.6 min

3.0 sec

(7/32) xVDD ≤Vin＜(9/32) xVDD

4.8 min

2.5 sec

(5/32) xVDD ≤Vin＜(7/32) xVDD

2.4 min

2.0 sec

(3/32) xVDD ≤Vin＜(5/32) xVDD

72 sec

1.5 sec

(1/32) xVDD ≤Vin＜(3/32) xVDD

36 sec

1.0 sec

0 ≤Vin＜(1/32) xVDD

9 sec

0.5 sec

Near distance

Long distance

Table 1：On-time and Fade-time

Table 2：Temperature compensation factor

Note：At 37°C, the voltage should be between VDD*19/128 and VDD*20/128.

Pin voltage

TCOMP factor

Pin voltage

TCOMP factor

< (16/128) xVDD

7/8

(24/128) xVDD

8/8

(17/12)8 xVDD

6/8

(25/128) xVDD

9/8

(18/128) xVDD

5/8

(26/128) xVDD

10/8

(19/128) xVDD

4/8

(27/128) xVDD

11/8

(20/128) xVDD

4/8

(28/128) xVDD

12/8

(21/128) xVDD

5/8

(29/128) xVDD

13/8

(22/128) xVDD

6/8

(30/128) xVDD

14/8

(23/128) xVDD

7/8

> (31/128) xVDD

15/8