60 W high power factor flyback LED driver based on the
Features
■
Mains voltage range: V
V
■
Minimum mains frequency: fL = 47 Hz
■
DC output voltage: V
■
Maximum output current: I
■
Minimum switching frequency: f
■
Reflected voltage: VR = 195 V
■
Leakage inductance spike: V
■
Expected efficiency: 92 %
■
RoHS compliant
ACmax
= 265 V
ac
out
ACmin
= 130 V
out
= 185 Vac,
= 0.462 A
spike
SWmin
= 100 V
STEVAL-ILL042V1
L6562AT and TSM101
Data brief
= 57 Hz
Description
The STEVAL-ILL042V1 demonstration board is a
LED power supply in high PF flyback
configuration able to drive a 60 W LED array. The
board is based on the L6562AT and the TSM101
controller.
This configuration uses an isolated feedback with
an optocoupler and a secondary side
reference/error amplifier, the TSM101, for voltage
and current regulation.
The TSM101 includes two op-amps. One op-amp
is used for constant voltage control and the other
one for constant current control.
The L6562AT is a PFC controller operating in
transition mode. The highly linear multiplier
includes a special circuit which is able to reduce
AC input current distortion, allowing wide-range
mains operation with an extremely low THD, even
over a large load range.
Efficiency is high at heavy load, more than 90% is
achievable.
This system, designed using the L6562AT and the
TSM101 controller, offers several advantages in
terms of output current and voltage stability.
March 2012 Doc ID 022285 Rev 2 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Schematic STEVAL-ILL042V1
AM10531v1
C20
2200nF- 630VDC
C16
2.2n-Y1- 250V
C26
2.2n-Y1- 250V
J3
CON3
1
2
3
-+
BR1
2A 1000V
2
1
3
4
T1
TRAFO
13
D5
F1
FUSE 1A
L3
2x47mH, 1.5A
12
43
C1A
100nF X2 Cap
C1B
100nF X2 Cap
Vin=185 to 265 Vac
R35
D4
TMMBAT46
C24
330uF, 160V
R32
68 kOhm
R33
12 kOhm
C18
100 nF, 50V
C15
47uF, 35V
R29
1MOhm
C10
330uF, 160V
R30
1 MOhm
C13
100 nF
C21
1n-Y1- 250V
7
6
2
13
12
10
9
4
3
D1
STTH1L06
D3
TMMBAT46
D5
STTH2L06
C9
330uF, 160V
J1
CON2
1
2
R14
12 kOhm
R4
10 Ohm
Q1
STP7N95K3
Vout=130 Vac, Iout=0.462A
D6
1.5KE350A
C17
2.2nF
R34
100 kOhm
R31
100 kOhm
R36
R25
1.1Ohm 0.25W
C22
4.7 uF 160V
D9
18V 0.5W
R15
100 Ohm
R16
12 kOhm
R37
20 kOhm
C14
1nF 25V
R21
0 Ohm
R22
82 kOhm
R18
15 kOhm
R26
1 MOhm
R27
8.2 kOhm
R5
68 kOhm
1MOhm
R44
1.1Ohm 0.25W
U3
INV
1
COMP
2
MULT
3
CS
4
R19
68 kOhm
R23
30 kOhm
680k
C23
150 pF 25V
R28
100 kOhm
R41
10 kOhm
C19
1uF
R38
10KOhm
C28
1uF 50V
ISO1
OPTO ISOLATOR-A
1 2
4 3
ZCD
5
GND
6
GD
7
VCC
8
R24
2.2kOhm
U5
TSM101
Vref
1
Csense
2
Crref
3
Gnd4Crin
5
Output
6
Vrin
7
VCC
8
C25
100 nF 25V
R42
2 kOhm
C27
1uF 50V
D7
TMMBAT46
D8
TMMBAT46
R20
47kOhm
R39
18 Ohm
C29
1uF 50V
R17
1.5 kOhm
R43
1.2 Ohm, 1%
R40
1.2 Ohm, 1%
1 Schematic
Figure 1. Electrical schematic
2/4 Doc ID 022285 Rev 2
STEVAL-ILL042V1 Revision history
2 Revision history
Table 1. Document revision history
Date Revision Changes
28-Sep-2011 1 Initial release.
20-Mar-2012 2 Modified: title of the document
Doc ID 022285 Rev 2 3/4
STEVAL-ILL042V1
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4/4 Doc ID 022285 Rev 2
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