IC OFFLINE SWIT UVLO HV TO220

TOP242YN

Manufacturer Part NumberTOP242YN
DescriptionIC OFFLINE SWIT UVLO HV TO220
ManufacturerPower Integrations
SeriesTOPSwitch®-GX
TypeOff Line Switcher
TOP242YN datasheet
 


Specifications of TOP242YN

Output IsolationIsolatedFrequency Range66 ~ 132kHz
Voltage - Output700VPower (watts)22W
Operating Temperature-40°C ~ 150°CPackage / CaseTO-220-7 (Formed Leads), 5 Leads
Output Voltage12 VInput / Supply Voltage (max)265 VAC
Input / Supply Voltage (min)85 VACDuty Cycle (max)83 %
Switching Frequency132 KHzSupply Current1.6 mA
Operating Temperature Range- 40 C to + 150 CMounting StyleThrough Hole
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names596-1067-5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Page 21
22
Page 22
23
Page 23
24
Page 24
25
Page 25
26
Page 26
27
Page 27
28
Page 28
29
Page 29
30
Page 30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
Page 23/52

Download datasheet (3Mb)Embed
PrevNext
Multiple Output, 60 W, 185-265 VAC Input Power Supply
Figure 44 shows a multiple output supply typical for high end
set-top boxes or cable decoders containing high capacity hard
disks for recording. The supply delivers an output power of
45 W continuous/60 W peak (thermally limited) from an input
voltage of 185 VAC to 265 VAC. Efficiency at 45 W,
185 VAC is ≥ 75%.
The 3.3 V and 5 V outputs are regulated to ±5% without
the need for secondary linear regulators. DC stacking (the
secondary winding reference for the other output voltages is
connected to the cathode of D10 rather than the anode) is used
to minimize the voltage error for the higher voltage outputs.
Due to the high ambient operating temperature requirement
typical of a set-top box (60 °C), the TOP246Y is used to
reduce conduction losses and minimize heatsink size. Resistor
R2 sets the device current limit to 80% of typical to limit
overload power. The line sense resistor (R1) protects the
TOPSwitch-GX from line surges and transients by sensing when
the DC rail voltage rises to above 450 V. In this condition the
TOPSwitch-GX stops switching, extending the input voltage
withstand to 496 VAC, which is ideal for countries with
poor power quality. A thermistor (RT1) is used to prevent
premature failure of the fuse by limiting the inrush current (due
PERFORMANCE SUMMARY
Output Power:
45 W Cont./60 W Peak
Regulation:
± 5%
3.3 V:
± 5%
5 V:
± 7%
12 V:
± 7%
18 V:
± 8%
30 V:
≥75%
Efficiency:
No Load Consumption:
0.6 W
VR1
R5
P6KE170
68 kΩ
2 W
D1-D4
1N4007 V
D6
1N4937
C2
68 µF
L1
20 mH
400 V
0.8A
C1
0.1 µF
X1
D
RV1
275 V
CONTROL
CONTROL
14 mm
F1
3.15 A
S
J1
RT1
10 Ω
L
1.7 A
N
Figure 44. 60 W Multiple Output Power Supply using TOP246.
to the relatively large size of C2). An optional MOV (RV1)
extends the differential surge protection to 6 kV from 4 kV.
Leakage inductance clamping is provided by VR1, R5 and C5,
keeping the DRAIN voltage below 700 V under all conditions.
Resistor R5 and capacitor C5 are selected such that VR1
dissipates very little power except during overload conditions.
The frequency jittering feature of TOPSwitch-GX allows the
circuit shown to meet CISPR22B with simple EMI filtering
(C1, L1 and C6) and the output grounded.
The secondaries are rectified and smoothed by D7 to D11, C7,
C9, C11, C13, C14, C16 and C17. Diode D11 for the 3.3 V
output is a Schottky diode to maximize efficiency. Diode D10
for the 5 V output is a PN type to center the 5 V output at 5 V.
The 3.3 V and 5 V output require two capacitors in parallel to
meet the ripple current requirement. Switching noise filtering
is provided by L2 to L5 and C8, C10, C12, C15 and C18.
Resistor R6 prevents peak charging of the lightly loaded 30 V
output. The outputs are regulated using a secondary reference
(U3). Both the 3.3 V and 5 V outputs are sensed via R11
and R10. Resistor R8 provides bias for U3 and R7 sets the
overall DC gain. Resistor R9, C19, R3 and C5 provide loop
compensation. A soft-finish capacitor (C20) eliminates output
overshoot.
R6
D7
10 Ω
UF4003
C7
47 µF
D8
50 V
UF5402
C9
330 µF
D9
25 V
UF5402
C11
C6
390 µF
2.2 nF
35 V
Y1
D10
BYV32-200
C5
1 nF
400 V
D11
MBR1045
D6
C3
1N4148
1 µF
R1
50 V
2 MΩ
T1
1/2 W
TOPSwitch-GX
L
TOP246Y
U1
C
C3
R3
0.1 µF
6.8 Ω
X
F
50 V
C5
R2
47 µF
9.08 kΩ
10 V
TOP242-250
C8
L2
10 µF
3.3 µH
50 V
3A
C10
L3
100 µF
3.3 µH
25 V
3A
C16
C13
C12
1000 µF
1000 µF
100 µF
L4
25 V
25 V
25 V
3.3 µH
5A
C14
C15
L5
1000 µF
220 µF
3.3 µH
25 V
16 V
5A
C18
C17
220 µF
1000 µF
16 V
25 V
R10
R7
15.0
150 Ω
kΩ
U2
R8
LTV817
R11
1 kΩ
9.53
kΩ
C19
R9
0.1 µF
3.3 kΩ
C20
U3
22 µF
TL431
R12
10 V
10 k
PI-2693-081704
30 V @
0.03 A
18 V @
0.5 A
12 V @
0.6 A
5 V @
3.2 A
3.3 V @
3 A
RTN
23
O
11/05