参数资料
| 型号： | TEA1753LT/N1,518 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 18/32页 |
| 文件大小： | 0K |
| 描述： | IC CTLR SMPS SW MODE 16SO |
| 标准包装： | 2,500 |
| 系列： | GreenChip™ III |
| 输出隔离： | 隔离 |
| 频率范围： | 100kHz ~ 150kHz，250kHz |
| 输入电压： | 16 V ~ 38 V |
| 输出电压： | 650V |
| 功率（瓦特）： | 600mW |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SO |
| 包装： | 带卷 (TR) |
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NXP Semiconductors
TEA1753LT
HV start-up flyback controller with integrated PFC controller
The charging current I start(soft)(FB) flows as long as V FBSENSE is less than approximately
0.63 V. If V FBSENSE exceeds 0.63 V, the soft start current source starts limiting the current.
After the flyback converter has started, the soft-start current source is switched off.
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Fig 14. Soft start-up of flyback.
7.3.7 Maximum on-time
The flyback controller limits the on-time of the external MOSFET to 40 ? s. When the
on-time is longer than 40 ? s, the IC stops switching and enters the safe restart mode.
7.3.8 Overvoltage protection (FBAUX pin)
An output overvoltage protection is implemented in the GreenChip III series. In the
TEA1753LT, the auxiliary voltage is sensed using the current flowing into the FBAUX pin
during the secondary stroke. The auxiliary winding voltage is a well-defined replica of the
output voltage. An internal filter averages voltage spikes.
An internal up-down counter prevents false OVP detection which occurs during ESD or
lightning events. The internal counter counts up by one when the output voltage exceeds
the OVP trip level within one switching cycle. The internal counter counts down by two
when the output voltage has not exceeded the OVP trip level within one switching cycle.
When the counter has reached eight, the IC assumes a true OVP, sets the latched
protection and switches off both converters .
The converter only restarts after the OVP latch is reset . In a typical application, the
internal latch is reset when the VINSENSE voltage drops below 750 mV and is then raised
to 870 mV.
The latched protection is also reset by removing both the voltage on the VCC and HV
pins.
The demagnetization resistor, R FBAUX sets the output voltage V o(OVP) at which the OVP
function trips:
V o ? OVP ? = ----------- ? I ovp ? FBAUX ? ? R FBAUX + V clamp ? FBAUX ? ?
N s
N aux
(7)
where N s is the number of secondary turns and N aux is the number of auxiliary turns of the
transformer. Current I ovp(FBAUX) is internally trimmed.
TEA1753LT
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 24 August 2012
? NXP B.V. 2012. All rights reserved.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TEA1753T | 制造商:未知厂家 制造商全称:未知厂家 功能描述:The TEA1753T combines a controller for Power Factor Correction (PFC) and a flyback controller. |
| TEA1753T/N1 | 制造商:NXP Semiconductors 功能描述:SMPS CNTRL QR FLYBACK & QR PFCSO16 制造商:NXP Semiconductors 功能描述:SMPS CNTRL, QR FLYBACK & QR PFC,SO16 |
| TEA1753T/N1,518 | 功能描述:DC/DC 开关控制器 GreenChip III SMPS control IC 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 |
| TEA1753T/N1518 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| TEA1755LT/1Y | 制造商:NXP Semiconductors 功能描述:Switched Mode Power Supply Controller 16-Pin SOIC T/R 制造商:NXP Semiconductors 功能描述:TEA1755LT/SO16/REEL13DP//1 - Tape and Reel 制造商:NXP Semiconductors 功能描述:IC SMPS CONTROLLER 16SOIC |
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