EVAL-PSR01B-35W
35 W wide input range flyback converter using HVLED001B quasi
resonant flyback controller and STF10LN80K5
Data brief
fold-back feature that, contemporarily, reduces
the output voltage ripple at light load.
Output short-circuit and overload protections are
auto-restart for a safe operation in lighting
environment.
Extremely low input power is there at no load
conditions.
Features
Input voltage: Vin: 90 - 265 Vrms, f: 45-66 Hz
Output voltage: 48 V / 730 mA
High power factor, low THD
No-load: better than 150 mW @ 230 Vin
Average full load efficiency: 90%
Short-circuit protection with auto restart
Safety: Acc. to EN60065
EMI: Acc. to EN55022 - conducted emissions
Description
The EVAL-PSR01B-35W is intended to provide a
stable and insulated 48 V voltage bus suitable to
supply secondary side circuitry for a total output
power of 35 W when a wide range of input
voltages is applied at its input. A very high power
factor is obtained thanks to HVLED001B features.
Input voltage variations, excessive input voltage
(overvoltage like surge or bursts) or very low input
voltages are managed by some of the
HVLED001B protections, improving the reliability
of the application.
The efficiency of the application is very high even
at very low load thanks to the improved frequency
October 2018
DB3733 Rev 1
For further information contact your local STMicroelectronics sales office.
1/5
www.st.com
Board description
1
EVAL-PSR01B-35W
Board description
Figure 1. Jumpers and connectors location
EVAL-PSR01B-35W
J1
VOUT
J2
VAC
GND
VAC
90Vac to 265Vac
2/5
48V
730mA
DB3733 Rev 1
Schematic diagram
2
Schematic diagram
EVAL-PSR01B-35W
Figure 2. . EVAL-PSR01B-35W - Schematic (* = component not fitted)
2
J2
C4
RV1
S10 K300
TOFF
OPTO
R16
36k
3
5
R2
10M
R7
1k
U1
TOFF
HVSU
C9
100n
VCC
CS
GD
ZCD
D8
7
9
ZCD
CS
GD
22uF 50V
C13
6
1N4148WS
D3
BZX384-C33
HVLED001B
OPTO
FB
C18
3.3nF
R9
47k
R8
15R
D11
VRECT
C8
10pF
R10
47k
D6
C17
220pF
R4
360R
D4
RS1K
1N4148WS
220R
D9
R12
220k
R17
0R62
220R
R14
R13
C14
220pF
Q1
T1
8
5
7
6
D1
R1
680uF 63V
C1
C6
STPS4S200S
Q1 Heatsink HS1
HEATSINK
21°C/W
680uF 63V
1
2
3
4
C7
1
1nF
1kV
C12
220pF
1kV
STF10LN80K5
R19
0R62
V_OUT
C5
D5
R5
1k
C2
220nF
R6
470k
1
2
J1
VOUT
9RXW 9
,RXW P$
3RXW ::#9LQ
1SMA5942BT3G
R3
100k
C3
D7
2.2nF 400V
R11
100k
18.2k
R21
D10
1N4148WS
R20
18.2k
1N4148WS
D2
2KBP08M
3
R15
10k
1k
R18
C19
22uF 50V
1N4148WS
3/5
DB3733 Rev 1
L1
1mH
L2
2x39mH - 0.8A
C10
100nF 310Vac X2
4
3
220nF 310Vac
C15
22nF
C16
220nF
10
VCC
1
HVSU
1
2
RV2
S10 K300
100nF 310Vac X2
C11
F1
1A
VIN
BZV55-C16
FB
4
GND
8
1
+
-
4
9DF 9DF9DF
1
2
5
Revision history
3
EVAL-PSR01B-35W
Revision history
Table 1. Document revision history
4/5
Date
Revision
24-Oct-2018
1
Changes
Initial release
DB3733 Rev 1
EVAL-PSR01B-35W
IMPORTANT NOTICE – PLEASE READ CAREFULLY
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and
improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on
ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order
acknowledgement.
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or
the design of Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.
ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2018 STMicroelectronics – All rights reserved
DB3733 Rev 1
5/5
5
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