參數(shù)資料
型號(hào)： TEA1532
廠商： NXP Semiconductors N.V.
英文描述： GreenChip SMPS control IC
中文描述： 綠色芯片開關(guān)電源控制IC
文件頁(yè)數(shù)： 8/27頁(yè)
文件大?。?/td> 147K
代理商： TEA1532
9397 750 13113
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Preliminary data sheet
Rev. 01 — 28 May 2004
8 of 27
Philips Semiconductors
TEA1532
GreenChip
II SMPS control IC
value of R
slopecomp
. Slope compensation prevents modulation of the on-time (duty cycle)
while operating in FF CCM. A possible drawback of sub-harmonic oscillation can be
output voltage ripple.
7.11 Minimum and maximum on-time
The minimum on-time of the SMPS is determined by the LEB time. The IC limits the
on-time to a maximum time which is dependent on the mode of operation:
QR mode: When the system requires an ‘on-time’ of more than 25
μ
s, a fault condition is
assumed (e.g. C
VCC
removed), the IC stops switching and enters the safe restart mode.
CCM: The driver duty cycle is limited to 70 %. So the maximum on-time is correlated to
the oscillator time which results in an accurate limit of the minimum input voltage of the
flyback converter.
7.12 PROTECT and timing input
The PROTECT input (pin 3) is a multi-purpose (high-impedance) input, which can be used
to switch off the IC and create a relatively long timing function. As soon as the voltage on
this pin rises above 2.5 V, switching stops immediately. For the timing function, a current of
typically 50
μ
A flows out of pin PROTECT and charges an external capacitor until the
activation level of 2.5 V is reached. This current source however, is only activated when
the converter is not in regulation, which is detected by the voltage on pin CTRL
(V
CTRL
< 0.63 V). A (small) discharge current is also implemented to ensure that the
capacitor is not charged, for example, by spikes, and a MOSFET switch is added to
ensure a defined start situation. The voltage on pin CTRL determines whether the IC
enters latched protection mode, or safe restart protection mode:
Fig 7.
Slope compensation.
001aaa830
CTRL
1
Slope compensation
current
0.63 V
control
detect
5.6 V
TEA1532
4
R
CTRL
R
slopecomp
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TEA1532AP/N1,112 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 GREENCHIP 2 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TEA1532APN 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 GREENCHIP 2 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TEA1532AT/N1,118 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 GREENCHIP 2 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TEA1532AT/N1/DG,11 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 12V 170mA 63KHz RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TEA1532AT/N1/DG,118 制造商:NXP Semiconductors 功能描述:Cut Tape
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