- 您现在的位置：买卖IC网 > PDF目录19656 > TOP249Y (Power Integrations)IC OFFLINE SWIT UVLO HV TO220 PDF资料下载
参数资料
| 型号： | TOP249Y |
| 厂商： | Power Integrations |
| 文件页数： | 11/52页 |
| 文件大小： | 0K |
| 描述： | IC OFFLINE SWIT UVLO HV TO220 |
| 标准包装： | 2,000 |
| 系列： | TOPSwitch®-GX |
| 输出隔离： | 隔离 |
| 频率范围： | 66 ~ 132kHz |
| 输出电压： | 700V |
| 功率（瓦特）： | 250W |
| 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 |
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页当前第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页第51页第52页
TOP242-250
DC MAX reduction, the vertical axis represents the magnitude of
the DC MAX . Line feed-forward with DC MAX reduction lowers
maximum duty cycle from 78% at I L(DC) (+60 μ A typical) to
38% at I OV (+225 μ A).
EXTERNAL CURRENT LIMIT (X) Pin Operation
(Y, R and F Packages)
When current is drawn out of the EXTERNAL CURRENT
LIMIT pin, it works as a voltage source of approximately
1.3 V up to a maximum current of -240 μ A (typical). At
-240 μ A, it turns into a constant current source (refer to
Figure 12a).
There are two functions available through the use of the
EXTERNAL CURRENT LIMIT pin: external current limit
and remote ON/OFF. Connecting the EXTERNAL CURRENT
LIMIT pin to the SOURCE pin disables the two functions. In
high ef?ciency applications, this pin can be used to reduce the
current limit externally to a value close to the operating peak
current by connecting the pin to the SOURCE pin through
a resistor. The pin can also be used for remote ON/OFF.
Table 2 shows several possible combinations using this pin. See
Figure 11 for a description of the functions where the horizontal
axis (left hand side) represents the EXTERNAL CURRENT
LIMIT pin current. The meaning of the vertical axes varies
with function. For those that control the ON/OFF states of the
output such as remote ON/OFF, the vertical axis represents the
enable/disable states of the output. For external current limit,
the vertical axis represents the magnitude of the I LIMIT . Please
see graphs in the Typical Performance Characteristics section
for the current limit programming range and the selection of
appropriate resistor value.
MULTI-FUNCTION (M) Pin Operation (P and G
Packages)
The LINE-SENSE and EXTERNAL CURRENT LIMIT pin
functions are combined to a single MULTI-FUNCTION pin
for P and G packages. The comparator with a 1 V threshold
at the LINE-SENSE pin is removed in this case as shown in
Figure 2b. All of the other functions are kept intact. However,
since some of the functions require opposite polarity of input
current (MULTI-FUNCTION pin), they are mutually exclusive.
For example, line sensing features cannot be used simultaneously
with external current limit setting. When current is fed into
the MULTI-FUNCTION pin, it works as a voltage source of
approximately 2.6 V up to a maximum current of +400 μ A
(typical). At +400 μ A, this pin turns into a constant current
sink. When current is drawn out of the MULTI-FUNCTION
pin, it works as a voltage source of approximately 1.3 V up to
a maximum current of -240 μ A (typical). At -240 μ A, it turns
into a constant current source. Refer to Figure 12b.
There are a total of ?ve functions available through the use
of the MULTI-FUNCTION pin: OV, UV, line feed-forward
with DC MAX reduction, external current limit and remote
ON/OFF. A short circuit between the MULTI-FUNCTION
pin and SOURCE pin disables all ?ve functions and forces
TOPSwitch-GX to operate in a simple three terminal mode
like TOPSwitch-II . The MULTI-FUNCTION pin is typically
used for line sensing by connecting a resistor from this pin to
the recti?ed DC high voltage bus to implement OV, UV and
DC MAX reduction with line voltage. In this mode, the value
of the resistor determines the line OV/UV thresholds, and the
DC MAX is reduced linearly with increasing recti?ed DC high
voltage starting from just above the UV threshold. External
current limit programming is implemented by connecting the
MULTI-FUNCTION pin to the SOURCE pin through a resistor.
However, this function is not necessary in most applications
since the internal current limit of the P and G package devices
has been reduced, compared to the Y, R and F package
devices, to match the thermal dissipation capability of the P
and G packages. It is therefore recommended that the MULTI-
FUNCTION pin is used for line sensing as described above and
not for external current limit reduction. The same pin can also
MULTI-FUNCTION PIN TABLE*
Figure Number
30
31
32
33
34
35
36
37
38
39
40
Three Terminal Operation
?
Under-Voltage
Overvoltage
Line Feed-Forward (DC MAX )
Overload Power Limiting
?
?
?
?
?
?
?
?
?
External Current Limit
?
?
?
?
Remote ON/OFF
?
?
?
?
?
*This table is only a partial list of many MULTI-FUNCTION pin con?gurations that are possible.
Table 3. Typcial MULTI-FUNCTION Pin Con?gurations.
O
11/05
11
相关PDF资料 |
PDF描述 |
|---|---|
| ATF1504ASVL-20JC44 | IC CPLD 64MACROCELL LV LP 44PLCC |
| HCC05DRTI-S13 | CONN EDGECARD 10POS .100 EXTEND |
| GMC65DRES-S13 | CONN EDGECARD 130POS .100 EXTEND |
| GSC60DREF-S13 | CONN EDGECARD 120PS .100 EXTEND |
| RMM28DSAS | CONN EDGECARD 56POS R/A .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TOP249Y- | 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 |
| TOP249Y/F | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Up to 290 W Extended power. design flexible. |
| TOP249YN | 功能描述:交流/直流开关转换器 180 W 85-265 VAC 250 W 230 VAC 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 |
| TOP249YN- | 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 |
| TOP249YN-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 |
发布紧急采购，3分钟左右您将得到回复。