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参数资料
| 型号： | TEA1742T |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 稳压器 |
| 英文描述： | 2 A POWER FACTOR CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 3.90 MM, PLASTIC, MS-012, SOT96-1, SOP-8 |
| 文件页数： | 16/17页 |
| 文件大小： | 99K |
| 代理商： | TEA1742T |
TEA1742T_1
NXP B.V. 2009. All rights reserved.
Objective data sheet
Rev. 01 — 10 February 2009
8 of 17
NXP Semiconductors
TEA1742T
GreenChip PFC controller
The charging current Istart(soft)PFC ows as long as the voltage on pin PFCSENSE is below
0.5 V (typ). If the voltage on pin PFCSENSE exceeds 0.5 V, the soft start current source
starts limiting the current Istart(soft)PFC. As soon as the PFC starts switching, the
7.2.6 Dual boost PFC
The PFC output voltage is modulated by the mains input voltage. The mains input voltage
is measured via the VINSENSE pin. The current is sourced from the VOSENSE pin if the
voltage on the VINSENSE pin drops below 2.2 V (typ). To ensure the stability of the
switch-over 200 mV is inserted around the 2.2 V, see Figure 6.
For low VINSENSE input voltages, the output current is 8 mA (typ). This output current, in
combination with the resistors on the VOSENSE pin, sets the lower PFC output voltage
level at low mains voltages. At high mains input voltages the current is switched to zero.
The PFC output voltage will then be at its maximum. As this current is zero in this
situation, it does not effect the accuracy of the PFC output voltage.
For proper switch-off behavior, the VOSENSE current is switched to its maximum value,
8 mA (typ), as soon as the voltage on pin VOSENSE drops below 2.1 V (typ).
Fig 5.
Soft start-up of PFC
SOFT START
CONTROL
OCP
11
PFCSENSE
0.5 V
Istartup(soft)PFC ≤ 60 A
S1
RSS1
CSS1
RSENSE1
014aaa157
Fig 6.
Voltage to current transfer function for dual boost PFC
VVINSENSE
II(VOSENSE)
014aaa738
8 A
2.2 V
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TEA1742T/N1,118 | 功能描述:DC/DC 开关控制器 GreenChip PFC controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TEA1750 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:The TEA1750 combines a controller for Power Factor Correction (PFC) and a flyback controller. |
| TEA1750T | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:GreenChip III SMPS control IC |
| TEA1750T,518 | 制造商:NXP Semiconductors 功能描述:SYNC RECTIFIER (SR) CONTROLLER |
| TEA1750T/N1,518 | 功能描述:DC/DC 开关控制器 GREENCHIPIII RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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