STEVAL-ISA021V1 STMicroelectronics, STEVAL-ISA021V1 Datasheet - Page 12
![BOARD REF VIPER22A SGL OUTPUT](/photos/9/30/93055/steval-isa021v1_sml.jpg)
STEVAL-ISA021V1
Manufacturer Part Number
STEVAL-ISA021V1
Description
BOARD REF VIPER22A SGL OUTPUT
Manufacturer
STMicroelectronics
Series
VIPER™r
Datasheet
1.STEVAL-ISA035V1.pdf
(17 pages)
Specifications of STEVAL-ISA021V1
Design Resources
STEVAL-ISA021V1 Gerber Files STEVAL-ISA021V1 Schematic STEVAL-ISA021V1 Bill of Material
Main Purpose
AC/DC, Primary Side
Outputs And Type
1, Isolated
Power - Output
10W
Voltage - Output
12V
Current - Output
840mA
Voltage - Input
90 ~ 264VAC
Regulator Topology
Flyback
Frequency - Switching
60kHz
Board Type
Fully Populated
Utilized Ic / Part
VIPer22A
Product
Power Management Modules
Lead Free Status / RoHS Status
Lead free by exemption / RoHS compliant by exemption
Other names
497-5219
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Circuit operation
1.8
12/17
Figure 10. Burst mode
Short circuit
The VIPer has pulse-by-pulse current limit. When the current ramps up to the current limit,
the pulse is terminated. This is manifested by reducing the output voltage as the current is
increased. The voltage decreases until it falls below the undervoltage shutdown threshold of
9 V, (pin4). During a short circuit the VIPer turns on and off. When the V
starting voltage, the current is limited by the pulse-by-pulse current limit. The voltage falls to
the undervoltage shutdown point and the cycle repeats itself at a 16% duty cycle. This
reduces the RMS current going through the circuit as seen in
Figure 11. Operation during a short
Figure
11.
dd
reaches the
AN2544