參數(shù)資料
型號(hào)： TOP247R-TL
英文描述： SMPS Controller
中文描述： 開關(guān)電源控制器
文件頁(yè)數(shù)： 24/52頁(yè)
文件大?。?/td> 457K
代理商： TOP247R-TL
TOP242-250
24
H
9/02
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 C4 provide loop compen-
sation. A soft-finish capacitor (C20) eliminates output
overshoot.
Application Notes 3
Design Ideas 4
Design Tools 5
10
μ
F
Quality and Reliability 6
125 V
μ
F
Package Information 7
165 V
5A
DPA-SwitchDC-DC Seminar 8
LinkSwitch & TinySwitch-IIAC-DC Seminar 9
1D6
1R7
R1
2 M
TOPSwitch-GXAC-DC Seminar 10
9.53
C5
47
μ
F
10 V
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 cont./60 W peak (thermally limited) from an input
voltage of 185 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 heat sink size. Resis-
tor 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
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
Figure 44. 60 W Multiple Output Power Supply using TOP246.
D7
D8
D9
D11
D10
T1
U2
LTV817
U3
C20
22
μ
F
10 V
R12
0.1
μ
F
R11
k
3.3 k
R8
1 k
C6
2.Y1
C7
47
μ
F
50 V
C9
325 V
μ
F
C11
335 V
μ
F
C14
125 V
μ
F
0.03 A
0.5 A
12 V @
0.6 A
3.2 A
3.3 V @
D1-D4
1N4007 V
F1
3.15 A
1RV1
J1
L1
20 mH
0.8A
t
°
L
N
R3
TOP246Y
U1
D
L
S
C
TOPSwitch-GX
R5
2 W
R6
10
RT1
10
C2
μ
F
68
4C5
C3
1
μ
F
C1
0.1
μ
F
X1
PI-2693-033001
CONTROL
C3
0.1
μ
F
50 V
9..R2
X
F
D6
1N4937
VR1
P6KE170
C13
125 V
μ
F
C17
1000
μ
F
C15
220
μ
F
16 V
125 V
μ
F
100
μ
F
25 V
C8
L2
3.3
μ
H
3A
L3
3.3
μ
H
3A
L4
3.3
μ
H
L5
PERFORMANCE SUMMARY
Output Power:
Regulation:
3.3 V:
5 V:
12 V:
18 V:
30 V:
Efficiency:
No Load Consumption:
45 W Cont./60 W Peak
±
5%
±
5%
±
7%
±
7%
±
8%
≥
75%
0.6 W
1
相關(guān)PDF資料
PDF描述
TOP248F SMPS Controller
TOP248R-TL SMPS Controller
TOP249F SMPS Controller
TOP249R-TL SMPS Controller
TOP243R-TL SMPS Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TOP247Y 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 125 W 85-265 VAC 165 W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
TOP247Y- 制造商:POWERINT 制造商全稱:Power Integrations, Inc. 功能描述:TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher
TOP247Y/F 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Up to 290 W Extended power. design flexible.
TOP247YN 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 128 W 85-265 VAC 165 W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
TOP247YN- 制造商:POWERINT 制造商全稱:Power Integrations, Inc. 功能描述:TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher
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