LIGHT DIMMER. M7232 Datasheet

M7232 DIMMER. Datasheet pdf. Equivalent

Part M7232
Description ON/OFF LIGHT DIMMER
Feature MOSDESIGN SEMICONDUCTOR CORP. CONTINUOUS, ON/OFF LAMP DIMMER , / DIMMER M7232 GENERAL DESCRIPTION.
Manufacture MOSDESIGN
Datasheet
Download M7232 Datasheet



M7232
一華半導體股份有限公司
MOSDESIGN SEMICONDUCTOR CORP.
CONTINUOUS, ON/OFF LAMP DIMMER
連續, 開/關調光器
DIMMER
M7232
GENERAL DESCRIPTION 功能敘述
M7232 is a CMOS integrated circuits designed for the control of brightness of incandescent lamps. The outputs control the
brightness of a lamp by controlling the firing angle of a TRAIC connected with the lamp. All internal timings are synchronized
with the line frequency by means of a phase-lock loop circuit and output occurs once every half-cycle of the line frequency.
The brightness of the output is con trolled by applying a low level at the TI input or a high level at the SL input. Function are
implemented with very few interface components.
If the sensor is touched momentarily (50ms to332ms), lamp is:
(a) Turned off if it was on.
(b) Turned on if it was off. The brightness resulting is either full brightness or depending on the circuit type, a previous brightness
stored in the IC memory.
If the sensor is touched more than 350ms the light intensity changes slowly. As long as the touch is maintained, the change
continues; the direction of change reverses whenever the maximum or minimum brightness is reached.
The IC also provides an input for slow dimming. By applying a slow clock to this input, the lamp can be dimmed slowly until total
turn off occurs.
FEATURES 產品特長
Phase-lock loop synchronization allows use in Wall Switch applications..
Provides brightness control of incandescent lamps with touch plates or mechanical switches.
Control the duty cycle from 23% to 88% (conduction angles foe AC half-cycle between 41° and 159°, respectively)
Operates at 50Hz/60Hz line frequency.
Wind range from 3.0 to 12.0 volt DC supply voltage.
Extension input for remote activation.
Input for slow dimming.
8 pin DIP package
APPLICATIONS 產品應用
Light dimmer, AC motor speed controller.
PIN ASSIGNMENT
M7232P
VDD 1
DO
CAP
ZC 4
8 AT
VSS
SL
5 TI
1/7 2008-07-31



M7232
一華半導體股份有限公司
MOSDESIGN SEMICONDUCTOR CORP.
CONTINUOUS, ON/OFF LAMP DIMMER
連續, 開/關調光器
DIMMER
M7232
PIN DESCRIPTION
Pin No. Pin Name
1 VDD Positive power supply
Description
A clock applied to this input causes the brightness to decrease in equal increments with each negative
transition of the clock. Eventually, when the lamp turns off, this input has no further effect. The lamp can
2 DO be turned on again by activating either the TI input or the SL input. For the transition from maximum
brightness to off, a total of 83 clock pulses are needed at the DO input. When either the SENSOR or the SL
input is active, the DO input is disabled.
3 CAP The input is for the PLL filter capacitor.
4
ZC
The AC Line Frequency is applied to this input through an external RC circuit. The Phase-Lock Loop in
the IC synchronizes all internal timings to the AC signal at the ZC input.
5
TI
A low level activates this input which controls the turn-on, turn-off and conduction angle Ø of the TI
signal with respect to the ZC input. see SENSOR DURATION TABLE.
The input is functionally identical to the TI input except that a high level activates this input.
6 SL It is recommended that the SL input be used instead of the TI input when long extension wires are used
between Sensing plates/switches and dimmer chip.
7 VSS Negative power supply
8
AT
The output is a low level pulse occurring once every half-cycle of the ZC input. The conduction angle Ø of
the output in relation to the ZC signal controls the lamp bright- ness.
The functional differences of different versions of the light dimmer ICs are explained in below Table
SENSOR / TOUCH DURATION TABLE
Momentary (32ms to 332ms) * Note 1
Pre-Touch Ø
Post-Touch Ø
Prolonged (more than 332ms) * Note1
Pre-Touch Ø
Post-Touch Ø
Dimming Direction
Reversal
Off
Memory * Note 2 Off
Starts varying at Memory * Note 3
Yes
Max.
Off
Max.
Starts varying at Max
N/A
Intermediate
Off
Intermediate
Starts varying at Pre-Touch brightness
Yes
Note1The timings are based on Fs = 60Hz, unless otherwise specified. 50Hz timings are 1.2 times 60Hz timings.
Note2"Memory" refers to the conduction angle, Ø which existed prior to the current off-state. First time after power-up,
the Memory value defaults to maximum conduction angle.
Note3First time after power-up, Long touch causes intensity to vary starting at minimum conduction angle.
2/7 2008-07-31





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