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| 型号： | TOP244G |
| 厂商： | Power Integrations |
| 文件页数： | 28/52页 |
| 文件大小： | 0K |
| 描述： | IC OFFLINE SWIT OVP UVLO HV 8SMD |
| 标准包装： | 50 |
| 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）： | 28W |
| 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-8B |
| 包装： | 管件 |
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TOP242-250
Function
Light Load Operation
Line Sensing/Exter-
nally Set Current
Limit (Y, R and F
Packages)
Current Limit
Programming Range
TOPSwitch-FX
Cycle skipping
Line sensing and
externally set current
limit mutually
exclusive (M pin)
100% to 40%
TOPSwitch-GX
Frequency and duty
cycle reduction
Line sensing and
externally set current
limit possible simul-
taneously (functions
split onto L and X pins
100% to 30%
TOPSwitch-GX
Advantages
? Improves light load ef?ciency
? Reduces no-load consumption
? Additional design ?exibility allows all
features to be used simultaneously
? Minimizes transformer core size in highly
continuous designs
P/G Package Current Identical to Y
Limits package
TOP243-246 P and
G packages internal
current limits reduced
? Matches device current limit to package
dissipation capability
? Allows more continuous design to lower
device dissipation (lower RMS currents)
Y/R/F Package
Current Limits
Thermal Shutdown
Maximum Duty Cycle
Reduction Threshold
Line Under-Voltage
Negative (turn-off)
Threshold
Soft-Start
100% (R and F
package N/A*)
125 ° C min.
70 ° C hysteresis
90 μ A
N/A*
10 ms (duty cycle)
90% (for equivalent
R DS(ON) )
130 ° C min.
75 ° C hysteresis
60 μ A
40% of positive
(turn-on) threshold
10 ms (duty cycle +
current limit)
? Minimizes transformer core size
? Optimizes ef?ciency for most applications
? Allows higher output powers in high
ambient temperature applications
? Reduces output line frequency ripple at
low line
? DC MAX reduction optimized for forward
designs using TOP248, TOP249 and
TOP250
? Provides a well de?ned turn-off threshold
as the line voltage falls
? Gradually increasing current limit in
addition to duty cycle during soft-start
further reduces peak current and voltage
? Further reduces component stresses
during start up
Table 5. Comparison Between TOPSwitch-FX and TOPSwitch-GX. *Not available
TOPSwitch-FX vs. TOPSwitch-GX
Table 5 compares the features and performance differences
between TOPSwitch - GX and TOPSwitch-FX . Many of the new
features eliminate the need for additional discrete components.
Other features increase the robustness of design, allowing cost
savings in the transformer and other power components.
TOPSwitch-GX Design Considerations
Power Table
Data sheet power table (Table 1) represents the maximum
practical continuous output power based on the following
conditions: TOP242 to TOP246: 12 V output, Schottky output
diode, 150 V re?ected voltage (V OR ) and ef?ciency estimates
from curves contained in application note AN-29. TOP247
to TOP250: Higher output voltages, with a maximum output
current of 6 A.
For all devices, a 100 VDC minimum for 85-265 VAC and
250 VDC minimum for 230 VAC are assumed and suf?cient
heat sinking to keep device temperature ≤100 ° C. Power
levels shown in the power table for the R package device
assume 6.45 cm 2 of 610 g/m 2 copper heat sink area in an
enclosed adapter, or 19.4 cm 2 in an open frame.
TOPSwitch-GX Selection
Selecting the optimum TOPSwitch - GX depends upon required
maximum output power, ef?ciency, heat sinking constraints
and cost goals. With the option to externally reduce current
limit, a larger TOPSwitch - GX may be used for lower power
applications where higher ef?ciency is needed or minimal heat
sinking is available.
28
O
11/05
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TOP244G- | 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 |
| TOP244GN | 功能描述:交流/直流开关转换器 20 W 85-265 VAC 28 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 |
| TOP244GN- | 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 |
| TOP244GN-TL | 功能描述:交流/直流开关转换器 20 W 85-265 VAC 28 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 |
| TOP244G-TL | 功能描述:IC OFFLINE SWIT OVP UVLO HV 8SMD RoHS:否 类别:集成电路 (IC) >> PMIC - AC-DC 转换器，离线开关 系列:TOPSwitch®-GX 标准包装:1 系列:FPS™ 输出隔离:隔离 频率范围:61kHz ~ 73kHz 输入电压:8 V ~ 26 V 输出电压:650V 功率（瓦特）:12W 工作温度:-40°C ~ 115°C 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-MDIP 包装:Digi-Reel® 其它名称:FSL206MRBNFSDKR |
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