Thermostat control demonstration board for refrigerators,
Features
■ Power supply: 220 Vac
■ Power output: 36 W
■ Boost topology
■ Discontinuous-conduction mode
■ RoHS compliant
Description
The STEVAL-IHT001V1demonstration board is a
complete reference system for a simple costeffective PFC (power factor corrector) using
bipolar transistors and is intended for low-tomedium power HF ballasts.
The proposed bipolar PFC solution targets the
low-cost HF ballast market up to 80 W as it
provides a simple cost-effective solution without
sacrificing THD and PF levels. No additional ICs
are required for the PWM signal as the device
uses just a power bipolar transistor and a closedloop feedback which performs the duty cycle
modulation and output power regulation.
STEVAL-IHT001V1
based on the ST7Lite39
Data brief
STEVAL-IHT001V1
The active PFC solution with bipolar transistor
adopts the boost topology operating in
discontinuous-conduction mode.
September 2010 Doc ID 18009 Rev 1 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Schematic circuit STEVAL-IHT001V1
20
BP
67
0n
39
51
TW
0n
13
PB
PB
PB
PB
PB
PB
VS
PB
NN
TC
EMP
TC
TS
ED
ED
ED
EF
IG
OO
RX
1 Schematic circuit
Figure 1. STEVAL-IHT001V1 demonstration board schematic diagram
ECTOR
J5
OSCI/CLKIN
VDD
TP7
LIGHT
0
R5
39
Q3
ACS102
R1
33 - 1/2W (TW)
1
2
J4
LIGHT
Q2
1
2
J3
DEFROST
1
2
MOTOR
J2
TP3
NEUTRAL
2
3
1
MAINS
J1
L
TP2
ACS110
ACST6
Q1
)
10n
C1
R2
1/4W (TW
51
C29
10n - X2
FUSE
D1
VDD
TP1
C2
+
VDD
TP6
DEFROST
0
13
R4
TP5
RUN
R3
150
VDD
OSCI/CLKIN
150k 1/4W (TW)
R7
47 - 1/2W (TW)
R6
- X2
C3
0n
67
5V6 - 0.3W
D2
1N4148
0u
220
GND
TP4
RST
C5
1n
RUNUNDOO
20
19
OSC2
PA0(HS)18PA1(HS)17PA2(HS)16PA3(HS)15PA5(HS)
OSCI/CLKIN
S
U1
VDD
RST3PB
VS
2
1
/16v
C4
100n
RST
VDD
150k - 1/4W(TW)
R8
R10
R9
750
LED1
LED3
LED2
2345678910
INDART CONN
C8
1n
TP9
DOORSW
TP12
BUZZER
TP11
TEMP
R
EZZU
R SW
ROST
HT
DEF
LIG
TEMP
CTS
B
TX
11
14
13
12
PA4(HS)
3/AIN3
0/AIN0
2/AIN2
1/AIN1
PB
PB
PB
7
4
6
5
1
3
2
S
VZ
LED
LED
LED
750
TX
PA6(HS)
PA7/TDO
RX
4/AIN4
6/RDI
5/AIN5
ST7LITE39 : DIP20
PB
PB
PB
8
9
10
+
-
NTC
NTC
RX
TP10
NTC-
1
2
J11
NTC
ZVS
TP8
R11
750
LED4
TX
CTS
RX
234
1
J10
Con1
VDD
CTS
1
J13
Door SW2
1
2
10k
R13
2
3
1
J12
Door SW1
C7
1n
4.7K
R17
200
R15
334
2
4
1
J23
Buzzer
C10
1n
TEMP
10k
R14
1
BP
C9
1n
30K
R12
2.2n
C11
C6
1n
RST
C13
C12
10n
10n
R18
1M
R16
4.7k
AM07967V1
2/4 Doc ID 18009 Rev 1
STEVAL-IHT001V1 Revision history
2 Revision history
Table 1. Document revision history
Date Revision Changes
23-Sep-2010 1 Initial release.
Doc ID 18009 Rev 1 3/4
STEVAL-IHT001V1
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4/4 Doc ID 18009 Rev 1
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