Figure 2.
STEVAL-GLA001V1 evaluation board synoptic
VCC_AC
VCC_AC
LDO 5 V
LDO 3.3 V
VDD
Viper
ZVS
To customer µC board
GND_AC
5VDC
MODE
T2
T3
tp+
tp-
+
-
LED1 LED2 LED3
J 203
J 202
Mains input
AC switches and load connections
Power supply primary side
Auxiliary supply for Triac gate control
Power supply insulated secondary side
5V/3.3V supply for µC and insulated gate control
ZVS circuit
( frequency detection)
AC Switches gate control
User interface
LED4
Power / Time
T1
Inpu t switch
Fuse
M OV
Inpu t ca pa citor
Hi gh vol ta ge
ind ica tor
X102
X103
X101
VDD
selector
L
N
3.3VDC
GND
To MC Connector
board
Z
V
S
G1
G2
G3
1.3
Targeted applications
The main targeted applications are residential appliances where insulation between microcontroller and mains
voltage is required, such as:
•
Washing machine, dish washer
•
Micro-wave oven, cooker, oven, soya-milk maker
•
Printer
•
Air-conditioning, fridge
•
Water-heater, heater
1.4
Main used part numbers
The main part number references used in the
evaluation board are:
•
AC Switches:
•
•
•
•
Flyback IC :
•
•
1.5
Operating range
The
evaluation board is designed to operate within the following operating conditions:
•
RMS line voltage range: 90 V to 265 Vrms
•
Line voltage frequency range: 50 to 60 Hz
•
Ambient temperature range: 0 to 60°C
•
Maximum input current: 10 Arms
UM2304
Targeted applications
UM2304
-
Rev 3
page 3/46