參數(shù)資料
型號(hào)： TEA1532P
廠商： NXP SEMICONDUCTORS
元件分類： 穩(wěn)壓器
英文描述： GreenChip SMPS control IC
中文描述： 2 A SWITCHING CONTROLLER, 75 kHz SWITCHING FREQ-MAX, PDIP8
封裝： 0.300 INCH, PLASTIC, DIP-8
文件頁(yè)數(shù)： 6/27頁(yè)
文件大?。?/td> 147K
代理商： TEA1532P
9397 750 13113
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Preliminary data sheet
Rev. 01 — 28 May 2004
6 of 27
Philips Semiconductors
TEA1532
GreenChip
II SMPS control IC
In fixed frequency continuous conduction mode, the internal oscillator determines the start
of the next converter stroke.
In both operating modes, a cycle skipping mode is activated at very low power (standby)
levels.
7.1 Start-up, mains enabling operation level and undervoltage lock out
Refer to
Figure 10
and
Figure 11
. Initially, the IC is self supplying from the rectified mains
voltage via pin DRAIN. Supply capacitor C
VCC
(at pin 1) is charged by the internal start-up
current source to a level of about 4 V or higher, depending on the drain voltage. Once the
drain voltage exceeds the V
m
(mains-dependent operation-enabling level), the start-up
current source will continue charging capacitor C
VCC
(switch S1 will be opened); see
Figure 1
. The IC will activate the power converter as soon as the voltage on pin V
CC
passes the V
start
level. The IC supply is taken over by the auxiliary winding as soon as the
output voltage reaches its intended level and the IC supply from the mains voltage is
subsequently stopped for high efficiency operation (green function).
The moment the voltage on pin V
CC
drops below V
UVLO
(undervoltage lock out), the IC
stops switching and enters a safe restart from the rectified mains voltage. Inhibiting the
auxiliary supply by external means causes the converter to operate in a stable,
well-defined burst mode.
7.2 Supply management
All (internal) reference voltages are derived from a temperature compensated, on-chip
band gap circuit.
7.3 Current control mode
Current control mode is used for its good line regulation behavior.
The on-time is controlled by the internally inverted pin CTRL voltage, which is compared
with the primary current information. The primary current is sensed across an external
resistor. The driver output is latched in the logic, preventing multiple switch-on.
The internal control voltage is inversely proportional to the external pin CTRL voltage, with
an offset of 1.5 V. This means that a voltage range from 1 V to approximately 1.5 V on
pin CTRL will result in an internal control voltage range from 0.5 V to 0 V (a high external
control voltage results in a low duty cycle).
Fig 6.
The V
sense(max)
voltage as a function of V
CTRL
.
V
CTRL
1 V
(typ)
0.52 V
1.5 V
(typ)
coa016
V
sense(max)
Cycle
skip
active
25 mV
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TEA1532P/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
TEA1532PN 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
TEA1532T 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChip SMPS control IC
TEA1532T/N1,118 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 GREENCHIP 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
TEA1532T/N1-T 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 GREENCHIP 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
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