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| 型号： | TOP250YN |
| 厂商： | Power Integrations |
| 文件页数： | 21/52页 |
| 文件大小： | 0K |
| 描述： | IC OFFLINE SWIT UVLO HV TO220 |
| 标准包装： | 50 |
| 输出隔离： | 隔离 |
| 频率范围： | 66 ~ 132kHz |
| 输出电压： | 700V |
| 功率（瓦特）： | 290W |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | TO-220-7（成形引线），6 引线 |
| 供应商设备封装： | TO-220-7C |
| 包装： | 管件 |
| 产品目录页面： | 1204 (CN2011-ZH PDF) |
| 其它名称： | 596-1081-5 |
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TOP242-250
increase ef?ciency. This design delivers 70 W at 19 V, from an
85 VAC to 265 VAC input, at an ambient of 40 ° C, in a small
sealed adapter case (4” x 2.15” x 1”). Full load ef?ciency is
85% at 85 VAC rising to 90% at 230 VAC input.
Due to the thermal environment of a sealed adapter, a TOP249Y
is used to minimize device dissipation. Resistors R9 and R10
externally program the current limit level to just above the
operating peak DRAIN current at full load and low line. This
allows the use of a smaller transformer core size without
saturation during startup or output load transients. Resistors
R9 and R10 also reduce the current limit with increasing line
voltage, limiting the maximum overload power at high input
line voltage, removing the need for any protection circuitry on
the secondary. Resistor R11 implements an under-voltage and
overvoltage sense as well as providing line feed-forward for
reduced output line frequency ripple. With resistor R11 set at
2 M ? , the power supply does not start operating until the DC
rail voltage reaches 100 VDC. On removal of the AC input,
the UV sense prevents the output glitching as C1 discharges,
turning off the TOPSwitch-GX when the output regulation is
lost or when the input voltage falls to below 40 V, whichever
occurs ?rst. This same value of R11 sets the OV threshold to
450 V. If exceeded, for example during a line surge,
TOPSwitch-GX stops switching for the duration of the surge,
extending the high voltage withstand to 700 V without device
damage. Capacitor C11 has been added in parallel with VR1 to
reduce Zener clamp dissipation. With a switching frequency of
132 kHz, a PQ26/20 core can be used to provide 70 W. To
maximize ef?ciency, by reducing winding losses, two output
windings are used each with their own dual 100 V Schottky
recti?er (D2 and D3). The frequency reduction feature of the
TOPSwitch-GX eliminates any dummy loading to maintain
regulation at no load and reduces the no-load consumption of
the power supply to only 520 mW at 230 VAC input. Frequency
jittering provides conducted EMI meeting the CISPR 22
(FCC B) / EN55022B speci?cation, using simple ?lter components
(C7, L2, L3 and C6), even with the output earth grounded.
To regulate the output, an optocoupler (U2) is used with a
secondary reference sensing the output voltage via a resistor
divider (U3, R4, R5, R6). Diode D4 and C15 ?lter and smooth
the output of the bias winding. Capacitor C15 (1 μ F) prevents
the bias voltage from falling during zero to full load transients.
Resistor R8 provides ?ltering of leakage inductance spikes,
keeping the bias voltage constant even at high output loads.
Resistor R7, C9 and C10 together with C5 and R3 provide
loop compensation.
Due to the large primary currents, all the small signal control
components are connected to a separate source node that is
Kelvin connected to the SOURCE pin of the TOPSwitch-GX .
For improved common-mode surge immunity, the bias winding
common returns directly to the DC bulk capacitor (C1).
19 V
820 μ F L1 0.1 μ F
200 μ H
@ 3.6 A
C13 C12 C11
0.33 μ F 0.022 μ F 0.01 μ F
400 V 400 V 400 V
BR1
RS805
8A 600 V
C7 2.2 NF
Y1 SAFETY
VR1
P6KE-
200
D1
UF4006
D2
MBR20100
D3
MBR20100
PERFORMANCE SUMMARY
OUTPUT POWER: 70 W
REGULATION: ± 4%
EFFICIENCY: ≥ 84%
RIPPLE: ≤ 120 MV PK-PK
NO LOAD CONSUMPTION: < 0.52 W @ 230 VAC
C3 C14
25 V 50 V
4.7 ?
TOPSwitch-GX
TOP249Y
U1
6.8 ?
RTN
U2
31.6 K ?
1%
C15
56 K ?
L2
820 μ H
2A
C6
0.1 μ F
X2
RT1
10 ?
1.7 A
F1
J1 3.15 A
L
N
T °
C1
150 μ F
400 V
L3
75 μ H
2A
D
R9
13 M ?
S
R10
20.5 K ?
2 M ?
T1
L
CONTROL
C
X F
C8
0.1 μ F
D4
R11 1N4148
1/2 W R8
R3
50 V C5
47 μ F
16 V
C2 C4
820 μ F R1 820 μ F
25 V 270 ? 25 V
R4
PC817A
R2
1 K ? R5
1 μ F 562 ?
50 V C9 1%
4.7 NF 50 V
C10
R7 0.1 μ F
50 V
U3
TL431 R6
4.75 K ?
1%
ALL RESISTORS 1/8 W 5% UNLESS OTHERWISE STATED.
PI-2691-042203
Figure 42. 70 W Power Supply using Current Limit Reduction with Line and Line Sensing for UV and OV.
O
11/05
21
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TOP250YN- | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher |
| TOP250YN-TL | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher |
| TOP250Y-TL | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher |
| TOP252-262 | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:Enhanced EcoSmart, Integrated Off-Line Switcher with Advanced Feature Set and Extended Power Range |
| TOP252EG | 功能描述:交流/直流开关转换器 13W (85-264V AC) 21W (230V AC) RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
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