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參數(shù)資料
| 型號： | TEA1733LT/N2 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 71 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 3.90 MM, PLASTIC, MS-012, SOT96-1, SOP-8 |
| 文件頁數(shù)： | 19/21頁 |
| 文件大?。?/td> | 215K |
| 代理商： | TEA1733LT/N2 |
TEA1733LT
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 25 January 2011
7 of 21
NXP Semiconductors
TEA1733LT
GreenChip SMPS control IC
When the voltage on pin VCC drops below the Vth(UVLO) level during normal operation, the
controller stops switching. The TEA1733LT/N1 enters Restart mode. In Restart mode, the
driver output is disabled and the VCC pin is recharged via resistor R3 to the rectified
mains. In the TEA1733LT/N2, a VCC undervoltage latches the IC in the off-state.
7.3 Supply management
All internal reference voltages are derived from a temperature compensated on-chip band
gap circuit. Internal reference currents are derived from a trimmed and temperature
compensated current reference circuit.
7.4 Input voltage detection (VINSENSE pin)
In a typical application the mains input voltage can be detected by the VINSENSE pin.
Switching will not take place until the voltage on VINSENSE has reached the
Vstart(VINSENSE) voltage (typically 0.94 V).
When the VINSENSE voltage drops below Vdet(L)(VINSENSE) (typically 0.72 V) or exceeds
Vdet(H)(VINSENSE) (typically 3.52 V), the converter stops switching and performs a restart.
If pin VINSENSE is left open or disconnected, the pin is pulled up by the internal 20 nA
(typical) current source to reach the Vdet(H)(VINSENSE) level. This triggers restart protection.
An internal clamp of 5.2 V (typical) protects this pin from overvoltages.
7.5 Protection input (PROTECT PIN)
Pin PROTECT is a general purpose input pin, which can be used to switch off the
converter (latched protection). The converter is stopped when the voltage on this pin is
pulled above Vdet(H)(PROTECT) (typically 0.8 V) or below Vdet(L)(PROTECT) (typically 0.5 V). A
current of 32
μA (typical) flows out of the chip when the pin voltage is at the
Vdet(L)(PROTECT) level. A current of 107 μA (typical) flows into the chip when the pin voltage
is at the Vdet(H)(PROTECT) level.
Fig 5.
Start-up sequence, normal operation and restart sequence
014aaa929
starting
converter
charging VCC
capacitor
normal
operation
protection
(power down)
soft start
VCC
ISENSE
VINSENSE
PROTECT
OPTIMER
VO
restart
soft start
Vstartup
Vth(UVLO)
Vdet(H)(VINSENSE)
Vdet(H)(PROTECT)
Vdet(L)(PROTECT)
4.5 V
1.2 V
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| TEA1733MT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChip SMPS control IC Adjustable overpower time-out |
| TEA1733MT/N2,118 | 功能描述:DC/DC 開關(guān)控制器 GREENCHIP SMPS CONTROL IC RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| TEA1733P/N1,112 | 功能描述:DC/DC 開關(guān)控制器 GREENCHIP SMPS CONTROL IC RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| TEA1733T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChip SMPS control IC |
| TEA1733T/DB/65W,598 | 制造商:NXP Semiconductors 功能描述:- Boxed Product (Development Kits) 制造商:NXP Semiconductors 功能描述:TEA1733 65W reference design 制造商:NXP Semiconductors 功能描述:TEA1733T/DB/65W,598 |
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