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参数资料
| 型号： | TOP242G-TL |
| 厂商： | POWER INTEGRATIONS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.72 A SWITCHING REGULATOR, 140 kHz SWITCHING FREQ-MAX, PDSO7 |
| 封装： | PLASTIC, SMD-8/7 |
| 文件页数： | 21/52页 |
| 文件大小： | 2175K |
| 代理商： | TOP242G-TL |
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TOP242-250
N
4/05
28
Function
TOPSwitch-FX TOPSwitch-GX
TOPSwitch-GX
Advantages
Light Load Operation Cycle skipping
Frequency and duty
cycle reduction
Improves light load efciency
Reduces no-load consumption
Line Sensing/Exter-
nally Set Current
Limit (Y, R and F
Packages)
Line sensing and
externally set current
limit mutually
exclusive (M pin)
Line sensing and
externally set current
limit possible simul-
taneously (functions
split onto L and X pins
Additional design exibility allows all
features to be used simultaneously
Current Limit
Programming Range
100% to 40%
100% to 30%
Minimizes transformer core size in highly
continuous designs
P/G Package Current
Limits
Identical to Y
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
100% (R and F
package N/A*)
90% (for equivalent
R
DS(ON))
Minimizes transformer core size
Optomizes efciency for most applications
Thermal Shutdown
125 °C min.
70 °C hysteresis
130 °C min.
75 °C hysteresis
Allows higher output powers in high
ambient temperature applications
Maximum Duty Cycle
Reduction Threshold
90 A
60 A
Reduces output line frequency ripple at
low line
DC
MAX reduction optimized for forward
designs using TOP248, TOP249 and
TOP250
Line Under-Voltage
Negative (turn-off)
Threshold
N/A*
40% of positive
(turn-on) threshold
Provides a well dened turn-off threshold
as the line voltage falls
Soft-Start
10 ms (duty cycle)
10 ms (duty cycle +
current limit)
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
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 reected voltage (V
OR) and efciency 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 sufcient
heat sinking to keep device temperature ≤100 °C. Power
levels shown in the power table for the R package device
assume 6.45 cm2 of 610 g/m2 copper heat sink area in an
enclosed adapter, or 19.4 cm2 in an open frame.
TOPSwitch-GX
Selection
Selecting the optimum TOPSwitch-GX depends upon required
maximum output power, efciency, 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 efciency is needed or minimal heat
sinking is available.
Table 5. Comparison Between TOPSwitch-FX and TOPSwitch-GX.
*Not available
相关PDF资料 |
PDF描述 |
|---|---|
| TOP246F | 4.32 A SWITCHING REGULATOR, 140 kHz SWITCHING FREQ-MAX, PZIP6 |
| TOP249F | 8.64 A SWITCHING REGULATOR, 140 kHz SWITCHING FREQ-MAX, PZIP6 |
| TOP244P | 2.16 A SWITCHING REGULATOR, 140 kHz SWITCHING FREQ-MAX, PDIP7 |
| TOP249FN-TL | 8.64 A SWITCHING REGULATOR, 140 kHz SWITCHING FREQ-MAX, PZIP6 |
| TOP246F-TL | 4.32 A SWITCHING REGULATOR, 140 kHz SWITCHING FREQ-MAX, PZIP6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TOP242P | 功能描述:IC OFFLINE SWIT OVP UVLO HV 8DIP 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 |
| TOP242P- | 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 |
| TOP242P/G | 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. |
| TOP242PN | 功能描述:交流/直流开关转换器 10W 85-265 VAC 15W 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 |
| TOP242PN- | 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 |
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