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STEVAL-ISA114V1
5 V/0.8 W wide-range 30 kHz buck converter
based on the VIPer06XS
Data brief
Description
This document describes a 5 V- 0.15 A power
supply set in buck topology with the VIPer06XS, a
new off-line high voltage converter by
STMicroelectronics, specifically developed for
non-isolated SMPS.
The features of the device include an 800 V
avalanche rugged power section, PWM operation
at 30 kHz with frequency jittering for lower EMI,
limiting current with adjustable set point, on-board
soft-start, safe auto-restart after a fault condition
and low standby power consumption.
Features
The available protection includes a thermal
shutdown with hysteresis, delayed overload
protection and open loop failure protection. All
protection is auto-restart mode.
• Universal input mains range:
– input voltage: 90 - 264 VAC
– frequency: 45 - 65 Hz
• Single-output voltage:
– 5 V @ 0.16 A continuous operation
• Fully protected against faults (overload,
feedback disconnection and overheating)
• EMI: according to EN55022-Class-B
July 2013
DocID025045 Rev 1
For further information contact your local STMicroelectronics sales office.
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Adapter features
1
STEVAL-ISA114V1
Adapter features
The electrical specifications are given in Table 1, the schematic in Figure 1, and the bill of
material in Table 2.
Table 1. Electrical specifications
Parameter
Symbol
Value
VIN
[80 VAC; 265 VAC]
Output voltage
VOUT
5V
Max. output current
IOUT
0.16 A
Precision of output regulation
∆VOUT_LF
±5%
High frequency output voltage ripple
∆VOUT_HF
50 mV
Max. ambient operating temperature
TAMB
60 ºC
Input voltage range
Table 2. Bill of material
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Name
Value
Description
C1
2.2 μF, 400 V
Electrolytic capacitor
Saxon
C2
2.2 μF, 400 V
Electrolytic capacitor
Saxon
C3
2.2 μF, 25 V
Ceramic capacitor
SMD: 0805
CFB
Not mounted
Ceramic capacitor
SMD: 0805
Cf
100 nF, 50 V
Ceramic capacitor
SMD: 0805
Cc
Not mounted
Ceramic capacitor
SMD: 0805
C7
22 nF, 25 V
Ceramic capacitor
SMD: 0805
Murata
C8
100 nF, 50 V
Ceramic capacitor
SMD: 0805
Murata
C9
100 μF, 25V
Electrolytic capacitor
D1
1N4007
High voltage rectifier
DO-41
Fairchild
D3
STTH1L06
High voltage ultra fast
rectifier
SMB (SOD87)
ST
D4
STTH1L06
High voltage ultra fast
rectifier
SMB (SOD87)
ST
Daux
Not mounted
Small signal diode
IC
VIPER06XS
High voltage converter
SSO-10
ST
L1
1 mH
Input filter inductor
SMD
Epcos
L2
RFB0810-681
0.68 mH power inductor
Coilcraft
R1
22 ohm
1 W resistor
Panasonic
R3
1 kohm, 1%
1/4 W resistor
DocID025045 Rev 1
Footprint
Manufacturer
Murata
Murata
Rubycon, ZL
series
SMD: 0805
Panasonic
STEVAL-ISA114V1
Adapter features
Table 2. Bill of material (continued)
Name
Value
Description
Footprint
Manufacturer
R4a
1.5 kohm, 1%
1/4 W resistor
SMD: 0805
Panasonic
R4b
22 kohm
1/4 W resistor
SMD: 0805
R5a
15 kohm
1/4 W resistor
SMD: 0805
R5b
0 ohm, 1%
1/4 W resistor
SMD: 0805
R6
Not mounted
1/4 W resistor
SMD: 0805
Rbl
10 kohm, 1%
1/4 W resistor
SMD: 0805
Panasonic
Panasonic
Figure 1. Schematic
AC IN
R1
D1
L1
R5a
R5b
DRAIN DRAIN DRAIN DRAIN DRAIN
R4a
C8
VIPer06XS
C1
D3
C2
GND VDD LIM
FB COMP
R4b
CFB
C3
Cf
Cc
R6
C7
D4
GND
R3
L2
Vout
C9
Rbl
GND
AM16734v1
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Layout
2
STEVAL-ISA114V1
Layout
Figure 2. Layout (top)
AM16790v1
Figure 3. Layout (bottom)
AM16789v1
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STEVAL-ISA114V1
Layout
Figure 4. Thermal measurement @ VIN = 80 VAC, full load (170 mA), 3.3 kohm bleeder
Figure 5. Thermal measurement @ VIN = 115 VAC, full load (170 mA) 3.3 kohm bleeder
Figure 6. Thermal measurement @ VIN = 230 VAC, full load (170 mA) 3.3 kohm bleeder
DocID025045 Rev 1
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Layout
STEVAL-ISA114V1
Figure 7. Thermal measurement @ VIN = 265 VAC, full load (170 mA) 3.3 kohm bleeder
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Revision history
Revision history
Table 3. Document revision history
Date
Revision
24-Jul-2013
1
Changes
Initial release.
DocID025045 Rev 1
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STEVAL-ISA114V1
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