- 您现在的位置：买卖IC网 > PDF目录19752 > TOP256GN-TL (Power Integrations)IC OFFLINE SWIT PROG OVP 8SMD PDF资料下载
参数资料
| 型号： | TOP256GN-TL |
| 厂商： | Power Integrations |
| 文件页数： | 23/50页 |
| 文件大小： | 0K |
| 描述： | IC OFFLINE SWIT PROG OVP 8SMD |
| 产品培训模块： | TOPSwitch® HX General Introduction |
| 标准包装： | 1 |
| 系列： | TOPSwitch®-HX |
| 输出隔离： | 隔离 |
| 频率范围： | 119kHz ~ 145kHz |
| 输出电压： | 700V |
| 功率（瓦特）： | 63W |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 8-SMD（7 个接脚），鸥形翼 |
| 供应商设备封装： | SMD-8C |
| 包装： | 标准包装 |
| 配用： | 596-1193-ND - KIT REF DESIGN TOP HX FOR TOP258 |
| 其它名称： | 596-1182-6 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页当前第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页
TOP252-262
A High Efficiency, 20 W continuous – 80 W Peak, Universal
Input Power Supply
The circuit shown in Figure 43 takes advantage of several of
TOPSwitch-HX features to reduce system cost and power
supply size and to improve power supply efficiency while
delivering significant peak power for a short duration. This
design delivers continuous 20 W and peak 80 W at 32 V from
an 90 VAC to 264 VAC input. A nominal efficiency of 82% at full
load is achieved using TOP258MN. The M-package part has an
optimized current limit to enable design of power supplies
capable of delivering high power for a short duration.
Resistor R12 sets the current limit of the part. Resistors R11
and R14 provide line feed forward information that reduces the
current limit with increasing DC bus voltage, thereby maintaining
a constant overload power level with increasing line voltage.
Resistors R1 and R2 implement the line undervoltage and
overvoltage function and also provide feed forward compensation
for reducing line frequency ripple at the output. The overvoltage
feature inhibits TOPSwitch-HX switching during a line surge
extending the high voltage withstand to 700 V without device
damage.
The snubber circuit comprising of VR7, R17, R25, C5 and D2
limits the maximum drain voltage and dissipates energy stored in
the leakage inductance of transformer T1. This clamp configuration
maximizes energy efficiency by preventing C5 from discharging
below the value of VR7 during the lower frequency operating
modes of TOPSwitch-HX. Resistor R25 damps high frequency
ringing for reduced EMI.
A combined output overvoltage and over power protection
circuit is provided via the latching shutdown feature of
TOPSwitch-HX and R20, C9, R22 and VR5. Should the bias
winding output voltage across C13 rise due to output overload
or an open loop fault (opto coupler failure), then VR5 conducts
triggering the latching shutdown. To prevent false triggering
due to short duration overload, a delay is provided by R20, R22
and C9.
To reset the supply following a latching shutdown, the V pin
must fall below the reset threshold. To prevent the long reset
delay associated with the input capacitor discharging, a fast AC
reset circuit is used. The AC input is rectified and filtered by
D13 and C30. While the AC supply is present, Q3 is on and Q1
is off, allowing normal device operation. However when AC is
removed, Q1 pulls down the V pin and resets the latch. The supply
will then return to normal operation when AC is again applied.
Transistor Q2 provides an additional lower UV threshold to the
level programmed via R1, R2 and the V pin. At low input AC
voltage, Q2 turns off, allowing the X pin to float and thereby
disabling switching.
A simple feedback circuit automatically regulates the output
voltage. Zener VR3 sets the output voltage together with the
voltage drop across series resistor R8, which sets the DC gain
of the circuit. Resistors R10 and C28 provide a phase boost to
improve loop bandwidth.
Diodes D6 and D7 are low-loss Schottky rectifiers, and
capacitor C20 is the output filter capacitor. Inductor L3 is a
common mode choke to limit radiated EMI when long output
cables are used and the output return is connected to safety
earth ground. Example applications where this occurs include
PC peripherals, such as inkjet printers.
1
C8
1 nF
250 VAC
10
R19 C26
68 ? 100 pF
0.5 W 1 kV
C20
330 μ F
50 V
L2
C31
22 μ F
50 V
L3
32 V
625 mA, 2.5 A PK
3.3 μ H
R18
39 k ?
R20
D8
1N4007
D11
1N4007
L1
5.3 mH
R23 R24
1 M ? 1 M ?
C1
220 nF
275 VAC
90 - 264
VAC
D9
1N4007
D10
1N4007
F1
3.15 A
t o
RT1
10 ?
D13
1N4007
R3
2 M ?
R4
2 M ?
C30
100 nF
400 V
C3
120 μ F
400 V
R1 R11
2 M ? 3.6 M ?
R2 R14
2 M ? 3.6 M ?
R21
1 M ?
0.125 W
R15
1 k ?
Q1
2N3904
Q3
2N3904
R26
68 k ?
R12
7.5 k ?
1%
Q2
2N3904
VR7
BZY97C150
150 V
R17
1 k ?
0.5 W
D V
CONTROL
S X
TOPSwitch-HX
U4
TOP258M N
C
R25
100 ?
C5
10 nF
1 kV
D2
FR107
VR5
1N5250B
20 V
C6
100 nF
50 V
2
3
NC
T1
EF25
R22
2 M ?
R6
6.8 ?
C7
47 μ F
16 V
9
5
C13
10 μ F
50 V
4
D5
LL4148
C9
1 μ F
100 V
D6-D7
STPS3150
C10
1 nF
250 VAC
R10
56 ?
C28
330 nF
50 V
U2A
PC817D
130 k ?
R8
1.5 k ?
VR3
1N5255B
28 V
R9
2 k ?
PI-4833-092007
47 μ H
C29
220 nF
50 V
RTN
Figure 43.
20 W Continuous, 80 W Peak, Universal Input Power Supply using TOP258MN.
23
www.powerint.com
Rev. H 06/13
相关PDF资料 |
PDF描述 |
|---|---|
| TAJC156K010RNJ | CAP TANT 15UF 10V 10% 2312 |
| EEM03DRKN | CONN EDGECARD 6POS DIP .156 SLD |
| ABM43DSEF-S243 | CONN EDGECARD 86POS .156 EYELET |
| TAJC106K010H | CAP TANT 10UF 10V 10% 2312 |
| NLCV25T-R68M-PFR | INDUCTOR POWER .68UH 1008 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TOP256LG | 功能描述:交流/直流开关转换器 64W (85-264VAC) 88W (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 |
| TOP256LN | 功能描述:交流/直流开关转换器 64W (85-264VAC) 88W (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 |
| TOP256MG | 功能描述:交流/直流开关转换器 26W/40W PK 85-264VAC 34W/63W PK (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 |
| TOP256MN | 功能描述:交流/直流开关转换器 Off-Line Switcher IC 26W/64W PK 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 |
| TOP256PG | 功能描述:交流/直流开关转换器 26W/40W PK 85-264VAC 34W/63W PK (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 |
发布紧急采购，3分钟左右您将得到回复。