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参数资料
| 型号： | TEA1506T/N1,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 9/22页 |
| 文件大小： | 0K |
| 描述： | IC CTLR SMPS PS SW MODE 14SOIC |
| 标准包装： | 2,500 |
| 系列： | GreenChip™ II |
| 输出隔离： | 隔离 |
| 频率范围： | 25kHz ~ 175kHz |
| 输入电压： | 8.7 V ~ 20 V |
| 输出电压： | 650V |
| 功率（瓦特）： | 750mW |
| 工作温度： | -20°C ~ 145°C |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SO |
| 包装： | 带卷 (TR) |
capacitive switching losses ? ? ? ?
P = --- × C × V × f
Philips Semiconductors
GreenChip ? II SMPS control IC
Valley switching
A new cycle starts when the power MOSFET is switched
on (see Fig.9). After the ‘on-time’ (which is determined by
the ‘sense’ voltage and the internal control voltage), the
switch is opened and the secondary stroke starts. After the
secondary stroke, the drain voltage shows an oscillation
1
with a frequency of approximately -----------------------------------------------
2 × π × ( L p × C d )
where L p is the primary self inductance of the transformer
and C d is the capacitance on the drain node.
As soon as the oscillator voltage is high again and the
secondary stroke has ended, the circuit waits for the
Product speci?cation
TEA1506P; TEA1506AP;
TEA1506T; TEA1506AT
lowest drain voltage before starting a new primary stroke.
This method is called valley detection.
Figure 9 shows the drain voltage together with the valley
signal, the signal indicating the secondary stroke and the
oscillator signal.
In an optimum design, the reflected secondary voltage on
the primary side will force the drain voltage to zero. Thus,
zero voltage switching is very possible, preventing large
1 2
2
and allowing high frequency operation, which results in
small and cost effective inductors.
handbook, full pagewidth
primary
stroke
secondary
stroke
secondary
ringing
drain
valley
secondary
stroke
B
A
oscillator
MGU235
A: Start of new cycle at lowest drain voltage.
B: Start of new cycle in a classical PWM system at high drain voltage.
Fig.9 Signals for valley switching.
2003 Sep 09
9
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相关代理商/技术参数 |
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|---|---|
| TEA1507 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:GreenChipII SMPS control IC |
| TEA1507P | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:GreenChipII SMPS control IC |
| TEA1507P/N1,112 | 功能描述:转换 - 电压电平 SMPS GREENCHIP II RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
| TEA1520 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:STARplug |
| TEA1520P | 制造商:STMicroelectronics 功能描述:NXP IC 8-PIN DIP |
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