STCC05-B STMicroelectronics, STCC05-B Datasheet - Page 2

• 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

STCC05-B
Figure 2. Block diagram
FUNCTIONAL DESCRIPTION
The STCC05 is a control circuit embedding most of the analog & power circuitry of an air conditioner or
refrigirator control module. It interfaces the micro-controller MCU with the AC power and cooling process
sections.
■
The 5V voltage regulator supplies the micro-controller MCU. Its input voltage ranges from 7V to 18V; and
its average DC output current up to 50mA. With an output filtering capacitor of 100µF, its output voltage
accuracy is better than +/- 5% in the whole operating range of the ambient temperature T
current I
The regulator includes also an over current limiter and a thermal shutdown. The over current limiter pro-
tects the regulator against output short circuits and inrush currents during the power up. The current limiter
is made of a serial shunt resistance as current sensor and a circuit that regulates the input current. More-
over, the thermal shutdown protects the whole circuit against overload operations. It is made of a thermal
sensing junction and a hysteresis comparator that is able to switch off the passing element.
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The voltage supply
DD
V
COM
PS
SYN
VP
RL
RL
RL
BZ
RL
BZ
IN
and the input voltage V
S
S
4
3
2
2
1
1
Shutdown
Thermal
V
V
V
V
PS
PS
PS
PS
V
PS
Reference
ZERO VOLTS SYNC.
LEVEL SHIFTER
1.25 V
5V REGULATOR
Over current
V
R
EMI FILTER
PS
1
Limiter
R
30µs FILTER
SENSE
RESET
RELAY DRIVER
RELAY DRIVER
RELAY DRIVER
20A RELAY
BUZZER
DRIVER
DRIVER
R
2
PS
IN
IN
IN
IN
EN
IN
V
RST\
ZVS
OUT
DD
4
3
2
1
BZ
, contributing directly to the ADC accuracy.
BZ
V
S
DD
Figure 3. Pin-out connections
V
DD
EN
SYN
V
V
RL
RL
RL
BZ
RL
BZ
IN
L
BZ
PS
S
2
3
4
2
1
1
V
H
V
V
H
L
= 3.75 V
= 3.40 V
1
2
3
4
5
6
7
8
9
10
V
DD
6kΩ
3kΩ
V
20
19
18
17
16
15
14
13
12
11
DD
/RST
100nF
C
UP
AMB
=
V
/RST
ZVS
OUT
IN
IN
IN
IN
IN
COM
DD
1
2
3
4
BZ
V
, the load
DD
S
R
MCU
UP
> 100kΩ
RESET