September 2016
DocID029130 Rev 2
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STEVAL-ISA178V1
5 V / 200 mA high voltage buck-converter based on VIPer01
Data brief
Features
Five-star energy efficiency for operation
under no load (PIN_no_load < 20 mW @ 230
VAC)
Meets ErP Lot 6 Tier 2 requirements for
household and office equipment
Compliant with the 10% load efficiency and
4-point average active-mode efficiency
targets prescribed by the European CoC ver.
5 Tier 2
Meets IEC55022 Class B conducted EMI
even with reduced EMI filter, thanks to the
frequency jittering feature
VIPer01 800V avalanche rugged technology
and embedded protections ensure enhanced
system reliability
RoHS compliant
Applications
Topology: buck
Input power consumption:
Less than 20 mW @ 230 VAC under no-
load condition
Less than 400 mW @ 230 VAC with 250
mW load
Input voltage: 85 - 265 VAC
Output voltage: 5 V
Output current: 200 mA
Switching frequency: 30 kHz with jittering
(±7%)
Max amb. temp: 60 °C
Automatic restart protections: OLP, short
circuit, VCC clamp, max duty cycle counter,
thermal shutdown
Pulse-skip protection to prevent the flux-
runaway
Dimensions: 29 mm x 30 mm
Description
STEVAL-ISA178V1 is a compact and efficient
solution for AC-DC power supplies, and performs
voltage conversion from the main line down to 5
V output voltage.
The low current consumption of the VIPer01 and
its low VCC voltage allows extremely low input
power consumption under no load and light load
conditions.
The pulse skip feature embedded in our IC
reduces the peak current typically present during
the startup phase of a buck converter.
Schematic diagram
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DocID029130 Rev 2
1 Schematic diagram
Figure 1: STEVAL-ISA178V1 circuit schematic
Daux
BAT41ZFILM
C5
not mounted
R1
22
L1
1mH D4
STTH1L06A
+
C1
2.2uF 400V
+
C2
2.2uF 400V
+
C3
2.2uF
R3
22k C6
not mounted
R4a
56k
C7
1nF
R2
2.7k
C4
100nF
D5
STTH1L06A C9
100uF 16V
D1
MRA4007 12
L2
1mH
1
2
IN
C8
220nF
Rubycon ZHL
1
2OUT
Rbl
5.6k
R4b
22k
D0
MRA4007
FB 4
COMP
5
VIPer_01
Drain
10 Drain
9Drain
8Drain
7
DIS 3
Vcc 2
GND 1
Drain
6
IC1
VIPer013XS
GSPG1803161245SG
STEVAL-ISA178V1
DocID029130 Rev 2
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2 Revision history
Table 1: Document revision history
Date
Version
Changes
24-Mar-2016
1
Initial release.
16-Sep-2016
2
Updated: cover page Title, Features and Description.
Added Applications on the cover page.
STEVAL-ISA178V1
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DocID029130 Rev 2
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