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參數(shù)資料
| 型號： | TEA1750T/N1,518 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 11/29頁 |
| 文件大小： | 163K |
| 描述： | IC PFC CONTROLLER DCM16SOIC |
| 標準包裝： | 2,500 |
| 系列： | GreenChip™ III |
| 模式： | 間歇導電（DCM） |
| 頻率 - 開關： | 100kHz ~ 150kHz |
| 電流 - 啟動： | 60µA |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 16-SO |
| 包裝： | 帶卷 (TR) |
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TEA1750_2
?NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 02 15 December 2008
11 of 29
NXP Semiconductors
TEA1750
GreenChip III SMPS control IC
7.2.7 Overcurrent protection (PFCSENSE pin)
The maximum peak current is limited cycle-by-cycle by sensing the voltage across an
external sense resistor (R
SENSE1
) on the source of the external MOSFET. The voltage is
measured via the PFCSENSE pin.
7.2.8 Mains undervoltage lock-out / brownout protection (VINSENSE pin)
To prevent the PFC from operating at very low mains input voltages, the voltage on the
VINSENSE pin is sensed continuously. As soon as the voltage on this pin drops below the
V
stop(VINSENSE)
level, switching of the PFC is stopped. If the low mains situation continues,
the PFC bus voltage eventually drops. The voltage on the VOSENSE pin then drops below
the V
start(fb)
level and the yback converter is also disabled.
The voltage on pin VINSENSE is clamped to a minimum value,
(V
start(VINSENSE)
V
pu(VINSENSE)
) for a fast restart as soon as the mains input voltage is
restored after a mains dropout.
7.2.9 Overvoltage protection (VOSENSE pin)
To prevent output overvoltage during load steps and mains transients, an overvoltage
protection circuit is built in.
As soon as the voltage on the VOSENSE pin exceeds the V
ovp(VOSENSE)
level, switching of
the power factor correction circuit is inhibited. Switching of the PFC recommences as
soon as the VOSENSE pin voltage drops below the V
ovp(VOSENSE)
level again.
When the resistor between pin VOSENSE and ground is open, the overvoltage protection
is also triggered.
7.2.10 PFC open loop protection (VOSENSE pin)
The power factor correction circuit does not start switching until the voltage on the
VOSENSE pin is above the V
th(ol)(VOSENSE)
level. This protects the circuit from open loop
and VOSENSE short situations. As the VOSENSE pin draws a small input current,
switching is also inhibited when the pin is left open.
Fig 6. Burst mode control
V
burst(H)
V
burst(L)
soft-stop
ton control
soft-start
V
VOSENSE
envelop of
peak current
014aaa019
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TEA1750T-T | 功能描述:DC/DC 開關控制器 GREENCHIPIII RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TEA1751AT/N1,518 | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TEA1751AT/N1518 | 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| TEA1751LT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChip III SMPS control IC |
| TEA1751LT/N1 | 制造商:NXP Semiconductors 功能描述:AC-DC PFC FLYBACK CNTRL 16SOIC 制造商:NXP Semiconductors 功能描述:AC-DC, PFC, FLYBACK, CNTRL, 16SOIC 制造商:NXP Semiconductors 功能描述:GreenChip III SMPS Control 16-Pin SO |
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