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参数资料
| 型号： | TOP261LG |
| 厂商： | Power Integrations |
| 文件页数： | 25/50页 |
| 文件大小： | 0K |
| 描述： | IC OFFLINE SWIT PROG OVP 7FESIP |
| 标准包装： | 48 |
| 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）： | 244W |
| 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-7F |
| 包装： | 管件 |
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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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