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參數(shù)資料
| 型號： | TOP243G |
| 英文描述： | SMPS Controller |
| 中文描述： | 開關(guān)電源控制器 |
| 文件頁數(shù)： | 22/52頁 |
| 文件大?。?/td> | 457K |
| 代理商： | TOP243G |
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TOP242-250
22
H
9/02
bias voltage from falling during zero to full load transients.
Resistor R8 provides filtering 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.
Data Sheets 2
common mode surge immunity the bias winding common re-
turns directly to the DC bulk capacitor (C1).
Design Ideas 4
70 W
±
4%
≥
84%
<
120 mV pk-pk
No Load Consumption:
<
0.52 W @ 230 VAC
Quality and Reliability 6
DPA-SwitchDC-DC Seminar 8
1N4148
270
LinkSwitch & TinySwitch-IIAC-DC Seminar 9
TOPSwitch-GX
1
F
TOPSwitch-GXAC-DC Seminar 10
C5
47
μ
F
16 V
A High Efficiency, Enclosed, 70 W, Universal Adapter Supply
The circuit shown in figure 42 takes advantage of several of the
TOPSwitch-GX
features to reduce cost, power supply size and
increase efficiency. This design delivers 70 W at 19 V, from an
85 to 265 VAC input, at an ambient of 40
°
C, in a small sealed
adapter case (4” x 2.15” x 1”). Full load efficiency 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
over voltage 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 first. 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
Figure 42. 70 W Power Supply using Current Limit Reduction with Line and Line Sensing for UV and OV.
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 efficiency, by reducing winding losses, two output
windings are used each with their own dual 100 V Schottky
rectifier (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 specification, using simple filter compo-
nents (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 filter and smooth
the output of the bias winding. Capacitor C15 (1
μ
F) prevents the
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
@ 3.6 A
TOP249Y
U1
U3
U2
PC817A
D
L
C
RTN
L2
820
μ
H
2 A
C6
0.1
μ
F
X2
F1
3.15 A
8
BR1
RS805
8 A 600 V
L3
75
μ
H
2 A
t
°
T1
C13
0.33
μ
F
400 V
C12
0.022
μ
F
400 V
C11
0.01
μ
F
400 V
RT1
10
1.7 A
PI-2691-033001
J1
L
N
CONTROL
C1
150
μ
F
400 V
C3
820
μ
F
25 V
L1
200
μ
H
C2
C14
0.1
μ
F
50 V
C4
25 V
C10
0.1
μ
F
4.7 nF 50 V
C8
50 V
VR1
P6KE-
200
D2
MBR20100
C7 2.2 nF
Y1 Safety
D3
MBR20100
D4
R11
2 M
R9
13 M
4.7
R2
1 k
R13
562
R4
1%
R7
56 k
R10
20.5 k
R3
6.8
R6
4.75 k
1%
C15
D1
UF4006
PERFORMANCE SUMMARY
Output Power:
Efficiency:
Ripple:
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TOP243G-TL | SMPS Controller |
| TOP250F | SMPS Controller |
| TOP250R-TL | SMPS Controller |
| TOP250Y | SMPS Controller |
| TOP246F | SMPS Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TOP243G- | 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 |
| TOP243GN | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 15W 85-265 VAC 25W 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 |
| TOP243GN- | 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 |
| TOP243GN-TL | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 15W 85-265 VAC 25W 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 |
| TOP243G-TL | 功能描述:IC OFFLINE SWIT OVP UVLO HV 8SMD RoHS:否 類別:集成電路 (IC) >> PMIC - AC-DC 轉(zhuǎn)換器，離線開關(guān) 系列:TOPSwitch®-GX 標(biāo)準(zhǔn)包裝:1 系列:FPS™ 輸出隔離:隔離 頻率范圍:61kHz ~ 73kHz 輸入電壓:8 V ~ 26 V 輸出電壓:650V 功率（瓦特）:12W 工作溫度:-40°C ~ 115°C 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-MDIP 包裝:Digi-Reel® 其它名稱:FSL206MRBNFSDKR |
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