T2117-TAQY Atmel, T2117-TAQY Datasheet - Page 4

• Manufacturer Part Number: T2117-TAQY
• Description: IC SWITCH 0-VOLT ADJ RAMP 8-SOIC
• Manufacturer: Atmel
• Type: Triac Controllerr

Specifications of T2117-TAQY

• Number Of Outputs: 1
• Internal Switch(s): No
• Current Limit: 100mA
• Voltage - Input: 230V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Rds (on): -

4. Triac Firing Current (Pulse)
5. Firing Pulse Width t
4
T2117
This depends on the triac requirement. It can be limited by the gate series resistance which is
calculated as follows:
I
where:
V
I
I
t
T
This depends on the latching current of the triac and its load current. The firing pulse width is
determined by the zero-crossing detection which can be influenced by the synchronous resis-
tance, R
where
I
V
P
The total current consumption is influenced by the firing pulse width which can be calculated as
follows:
t
R
R
P
Gmax
p
p
L
p
G
M
Gmax
sync
=
=
I
------------- -
2 -- -
Gmax
= Gate voltage
= Maximum gate current
= Average gate current
= Firing pulse width
= Mains period duration
= Latching current of the triac
= Mains supply, effective
= Load power
=
T
arc. sin
sync
V
----------------------------------------------------------------- - 49 k
p
7.5 V V
----------------------------------- - 36
M
, (see
t
2 sin
I
p
Gmax
–
I
-------------------
3.5
L
P 2
Gmax
Figure 5-2 on page
V
10
M
t
--- -
2
-5
–
p
A
–
0.6 V
–
5).
4768B–INDCO–10/05