参数资料
型号: TOP256GN-TL
厂商: Power Integrations
文件页数: 25/50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
TOP252-262
Key Application Considerations
TOPSwitch-HX vs. TOPSwitch-GX
features eliminate the need for additional discrete components.
Table 4 compares the features and performance differences
between TOPSwitch-HX and TOPSwitch-GX. Many of the new
TOPSwitch-HX vs. TOPSwitch-GX
Other features increase the robustness of design, allowing cost
savings in the transformer and other power components.
Function
TOPSwitch-GX
TOPSwitch-HX
TOPSwitch-HX Advantages
EcoSmart
Linear frequency reduction to Multi-mode operation with
30 kHz (@ 132 kHz) for linear frequency reduction to
duty cycles < 10% 30 kHz (@ 132 kHz) and
multi-cycle modulation
(virtually no audible noise)
?  Improved efficiency over load (e.g. at 25% load
point)
?  Improved standby efficiency
?  Improved no-load consumption
Output Overvoltage
Protection (OVP)
Line Feed-Forward with Duty
Cycle Reduction
Switching Frequency DIP-8
Package
Lowest MOSFET On
Resistance in DIP-8 Package
I 2 f Trimming
Not available
Linear reduction
132 kHz
3.0 W (TOP246P)
Not available
User programmable primary
or secondary hysteretic or
latching OVP
Dual slope reduction with
lower, more accurate onset
point
66 kHz
1.8 W (TOP258P)
-10% / +20%
?  Protects power supply output during open loop fault
?  Maximum design flexibility
?  Improved line ripple rejection
?  Smaller DC bus capacitor
?  Increased output power for given MOSFET size due
to higher efficiency
?  Increased output power in designs without external
heat sink
?  Increased output power for given core size
?  Reduced over-load power
Auto-restart Duty Cycle
5.6%
2%
?  Reduced delivered average output power during
open loop faults
Frequency Jitter
Thermal Shutdown
±4 kHz @ 132 kHz
±2 kHz @ 66 kHz
130 °C to 150 °C
±5 kHz @ 132 kHz
±2.5 kHz @ 66 kHz
135 °C to 150 °C
?  Reduced EMI filter cost
?  Increased design margin
External Current Limit
30%-100% of I LIMIT
30%-100% of I LIMIT , additional ?  Reduced tolerances when current limit is set
trim at 0.7 × I LIMIT externally
Line UV Detection Threshold
50 m A (2 M W sense
impedance)
25 m A (4 M W sense
impedance)
?  Reduced dissipation for lower no-load consumption
Soft-Start
10 ms duty cycle and current 17 ms sweep through
limit ramp multi-mode characteristic
?  Reduced peak current and voltage component
stress at startup
?  Smooth output voltage rise
Table 4.
Comparison Between TOPSwitch-GX and TOPSwitch-HX.
25
www.powerint.com
Rev. H 06/13
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