STCC05-B STMicroelectronics, STCC05-B Datasheet - Page 7

• Manufacturer Part Number: STCC05-B
• Description: Home appliance control circuit
• Manufacturer: STMicroelectronics

Specifications of STCC05-B

• Wide Range Input Supply Voltage Operation: 7 to 18V
• Ambient Temperature: - 20 to 85°C

DC CHARACTERISTICS
Figure 4: Typical regulator voltage V
versus its output current I
Figure 6: Typical relay driver R
state voltage variation versus its current
AIR CONDITIONER APPLICATION CONSIDERATIONS
■
Some basic rules can be applied to improve the STCC05 immunity in its application:
- The power ground of V
- The STCC05 is placed as close as possible of the MCU,
- The supply capacitors would increase the system immunity by being placed closed to the blocks they feed,
- Large supply wire on the PCB should be avoided to reduce sensitivity to radiated interferences.
- A decoupling capacitor can be put on the pin IN
Depending of the PCB layout quality, others capacitors may be put on sensitive pins such as the output
regulator pin V
or putting decoupling capacitors (f.i. C
(f.i. C
5.2
5.1
4.9
4.8
4.7
4.6
4.5
4.4
4.3
4.2
4.1
1.1
0.9
0.8
0.7
0.6
0.5
IMMUNITY IMPROVEMENT OF STCC05 AND THE MICROCONTROLLER
5
4
1
0
0
Vdd (V)
INS
Von (V)
= 10nF; C
20
10
Vin = 9V
Vin = 16V
Tj = -25ºC
Tj = 25ºC
Tj = 85ºC
DD
and the zero crossing synchronization input pin SYN.
UP
40
20
= 100nF).
PS
DD
should be split from the signal ground of V
60
30
at T
J
= 25°C
L (1 to 3)
DD
40
DD
80
Ion (mA)
Idd (mA)
= C
variation
PS
50
100
on-
= 100nF)
S
of the speed sensor interface and the MCU reset pin
Figure 5: Typical regulator voltage V
versus its junction temperature at V
Figure 7: Typical compressor relay driver RL
state voltage variation versus its current
5.025
4.975
4.925
5.05
4.95
4.9
1.1
0.9
0.8
0.7
0.6
0.5
5
1
-25
0
Vdd (V)
Von (V)
0
DD
Tj = -25ºC
Tj = 25ºC
Tj = 85ºC
Idd = 5mA
Idd = 40mA
25
,
50
50
75
100
100
STCC05-B
IN
DD
Ion (mA)
= 12V
125
variation
Tj(°C)
150
4
7/13
150
on-
(1)
(2)
(3)
(4)