- 您现在的位置：买卖IC网 > PDF目录22108 > TOP266EG (Power Integrations)IC OFFLINE SW PWM OCP OVP 7ESIP PDF资料下载
参数资料
| 型号： | TOP266EG |
| 厂商： | Power Integrations |
| 文件页数： | 21/40页 |
| 文件大小： | 0K |
| 描述： | IC OFFLINE SW PWM OCP OVP 7ESIP |
| 特色产品： | TopSwitch?-JX Integrated Switcher Ics |
| 标准包装： | 48 |
| 输出隔离： | 隔离 |
| 频率范围： | 66 ~ 132kHz |
| 输出电压： | 725V |
| 功率（瓦特）： | 86W |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 7-SIP，6 引线，裸露焊盘，成形引线 |
| 供应商设备封装： | eSIP-7C |
| 包装： | 管件 |
| 其它名称： | 596-1272-5 |
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页当前第21页第22页第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
TOP264-271
located close to the CONTROL and SOURCE pins of TOP264-271
and away from the drain and clamp component traces. The
primary side clamp circuit should be positioned such that the loop
area from the transformer end (shared with DRAIN) and the clamp
capacitor is minimized. The bias winding return node should be
connected via a dedicated trace directly to the bulk capacitor
and not to the SOURCE pins. This ensures that surge currents
are routed away from the SOURCE pins of the TOPSwitch-JX.
Y Capacitor
The Y capacitor should be connected close to the secondary
output return pin(s) and the positive primary DC input pin of the
transformer. If the Y capacitor is returned to the negative end of
the input bulk capacitor (rather than the positive end) a dedicated
trace must be used to make this connection. This is to “steer”
leakage currents away from the SOURCE pins in case of a
common-mode surge event.
Heat Sinking
The exposed pad of the E package (eSIP-7C), K package
(eSOP-12) and the V package (eDIP-12) are internally electrically
tied to the SOURCE pin. To avoid circulating currents, a heat
sink attached to the exposed pad should not be electrically tied
to any primary ground/source nodes on the PC board. On
double sided boards, topside and bottom side areas connected
with vias can be used to increase the effective heat sinking
area. The K package exposed pad may be directly soldered to
a copper area for optimum thermal transfer. In addition,
sufficient copper area should be provided at the anode and
cathode leads of the output diode(s) for heat sinking. In
Figure 29, a narrow trace is shown between the output rectifier
and output filter capacitor. This trace acts as a thermal relief
between the rectifier and filter capacitor to prevent excessive
heating of the capacitor.
Quick Design Checklist
In order to reduce the no-load input power of TOP264-271
designs, the V pin operates at very low current. This requires
careful layout considerations when designing the PCB to avoid
noise coupling. Traces and components connected to the V pin
should not be adjacent to any traces carrying switching currents.
These include the drain, clamp network, bias winding return or
www.powerint.com
power traces from other converters. If the line sensing features
are used, then the sense resistors must be placed within 10 mm
of the V pin to minimize the V pin node area. The DC bus
should then be routed to the line sense resistors. Note that
external capacitance must not be connected to the V pin as this
may cause misoperaton of the V pin related functions. As with
any power supply design, all TOP264-271 designs should be
verified on the bench to make sure that components specifi-
cations are not exceeded under worst-case conditions. The
following minimum set of tests is strongly recommended:
1. Maximum drain voltage – Verify that peak V DS does not
exceed 675 V at highest input voltage and maximum
overload output power. Maximum overload output power
occurs when the output is overloaded to a level just before
the power supply goes into auto-restart (loss of regulation).
2. Maximum drain current – At maximum ambient temperature,
maximum input voltage and maximum output load, verify
drain current waveforms at start-up for any signs of trans-
former saturation and excessive leading edge current spikes.
TOP264-271 has a leading edge blanking time of 220 ns to
prevent premature termination of the ON-cycle. Verify that
the leading edge current spike is below the allowed current
limit envelope (see Figure 34) for the drain current waveform
at the end of the 220 ns blanking period.
3. Thermal check – At maximum output power, both minimum
and maximum voltage and ambient temperature; verify that
temperature specifications are not exceeded for TOP264-
271, transformer, output diodes and output capacitors.
Enough thermal margin should be allowed for the part-to-
part variation of the R DS(ON) of TOP264-271, as specified in
the data sheet. The margin required can either be calculated
from the values in the parameter table or it can be accounted
for by connecting an external resistance in series with the
DRAIN pin and attached to the same heat sink, having a
resistance value that is equal to the difference between the
measured R DS(ON) of the device under test and the worst case
maximum specification.
Design Tools
Up-to-date information on design tools can be found at the
Power Integrations website: www.powerint.com
21
Rev. E 08/12
相关PDF资料 |
PDF描述 |
|---|---|
| GRM3195C1H682JA01D | CAP CER 6800PF 50V 5% NP0 1206 |
| M4A3-64/32-7VNC48 | IC CPLD ISP 4A 64MC 48TQFP |
| GSA50DTKD | CONN EDGECARD 100PS DIP .125 SLD |
| M4A3-64/32-10VNI48 | IC CPLD ISP 4A 64MC 48TQFP |
| GMA50DTKD | CONN EDGECARD 100PS DIP .125 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TOP266EG/VG | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:Integrated Off-Line Switcher with EcoSmart Technology for Highly Efficient Power Supplies |
| TOP266EG-TL | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:Integrated Off-Line Switcher with EcoSmart Technology for Highly Efficient Power Supplies |
| TOP266KG | 功能描述:交流/直流开关转换器 Int Off-Line Switchr EcoSmart,28.5W/39W 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 |
| TOP266KG-TL | 功能描述:交流/直流开关转换器 Int Off-Line Switchr EcoSmart,28.5W/39W 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 |
| TOP266VG | 功能描述:交流/直流开关转换器 Int Off-Line Switchr 86W/119W 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。