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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.

PIN DESCRIPTION

Pin No.

Name

I/O

Description

1

TEST

I

Reserved test mode, connect to VSS

2

TTEST

I

Reserved test mode, connect to VSS

3

RETRIG

I

Retrigger mode select input.

VDD or floating：As long as movement is detected within the on-time, the light will remain on.

VSS：The light will first switch off, before it can be switched on again.

4

PIRIN

I

PIR sensor input

5

VSS

Ground

6

RELAY

O

Relay output pin

7

PWM

O

Light output (PWM), external transistor

8

VDD

─

Digital VDD

9

BRIGHT

I

Brightness adjustment.

Sets the maximum brightness of the light connected to the PWM output. The brightness levels are

divided into 15 steps. Maximum brightness occurs at a pin voltage of 15/64*VDD.

10

FADE

I

Fade time adjustment。Sets the time it takes to switch the light on or off (soft dimming). Refer to

Table1

11

SENS

I

Sensitivity threshold adjustment。Sets the sensitivity threshold required to generate a trigger condition.

Refer to Table1

12

ON-TIME

I

Light on-time adjustment. Refer to Table1

13

TCOMP

I

Temperature compensation input, A temperature dependent resistor network may be connected to this

pin to generate voltages between VDD*16/128 and VDD*31/128. The voltage on this pin must

decrease as the temperature increases. At 37°C, the voltage should be between VDD*19/128 and

VDD*20/128. Internally. Refer to Table2.

TCOMP input may be connected to VSS if the application does not require a temperature

compensation function.

14

CDS

I

Connect to the CDS voltage divider for daytime/night auto detecting

VDD：Enable switching of the light

VSS：Disable switching of the light

15

SWIN

I

ON-AUTO-OFF select input

VDD：light permanently ON

VSS：light permanently OFF

Floating：PIR sensor mode (AUTO)

16

VDDA

─

PIR VDD