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參數(shù)資料
| 型號： | TEA1533T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | GreenChipTMII SMPS control IC |
| 中文描述： | 2 A SWITCHING CONTROLLER, 205 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | 3.90 MM, PLASTIC, SOT-108-1, SO-14 |
| 文件頁數(shù)： | 10/24頁 |
| 文件大小： | 117K |
| 代理商： | TEA1533T |
2002 Aug 23
10
Philips Semiconductors
Product specification
GreenChip
TM
II SMPS control IC
TEA1533P; TEA1533AP
Short winding protection
After the leading edge blanking time, the short winding
protection circuit is activated. If the ‘sense’ voltage
exceeds the short winding protection voltage V
swp
, the
converter will stop switching. Once V
CC
drops below the
UVLO level, capacitor C
VCC
will be recharged and the
supply will restart again. This cycle will be repeated until
the short-circuit is removed (safe restart mode).
The short winding protection will also protect in case of a
secondary diode short-circuit.
OverTemperature Protection (OTP)
An accurate temperature protection is provided in the
circuit. When the junction temperature exceeds the
thermal shutdown temperature, the IC will stop switching.
When V
CC
drops to UVLO, capacitor C
VCC
will be
recharged to the V
start
level.
Regarding the TEA1533P, this IC will not start switching
again. Subsequently, V
CC
will drop again to the UVLO
level, etc. Operation only recommences when the V
CC
voltage drops below a level of approximately 4.5 V
(practically when the V
mains
has been disconnected for a
short period).
Regarding the TEA1533AP, when the V
start
level is
reached, switching starts again (safe restart mode). This
process is repeated as long as the OTP condition exists.
Control pin protection
If pin CTRL is open-circuit or not connected, a fault
condition is assumed and the converter will stop switching.
Operation will recommence as soon as the fault condition
is removed.
Burst mode standby
Pin CTRL is also used to implement the burst mode
standby. In burst mode standby, the power supply enters
a special low dissipation state. Figure 11 shows a flyback
converter using the burst mode standby function. The
system enters burst mode standby when the
microcontroller activates NPN transistor T1 on the
secondary side.
When the voltage on C
micro
exceeds a certain voltage
measured by the microcontroller, the opto-coupler is
activated by T1, sending a large current signal to
pin CTRL. In response to this signal, the IC stops
switching and enters a ‘hiccup’ mode. This burst activation
signal should be present for longer than the ‘burst blank’
period (typically 30
μ
s): the blanking time prevents false
burst triggering due to spikes. Figure 12 shows the burst
mode standby signals. The hiccup mode during burst
mode standby operation does not differ from the hiccup
mode at safe restart during a system fault condition (e.g.
output short-circuit). The power is reduced during soft
restart mode.
Burst mode standby operation continues until the
microcontroller stops activating transistor T1. The system
then enters the start-up sequence and begins normal
switching behaviour.
handbook, halfpage
0.52 V
(typ)
0.3 V
(typ)
IDEM
Vsense(max)
24
μ
A
(typ)
100
μ
A
(typ)
Fig.9 OPP correction curve.
I
burstmode
V
CTRL
R
I
th(on)
+
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TEA1533T/N1,118 | 功能描述:電壓模式 PWM 控制器 GREENCHIP II SMPS CONTROL IC RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| TEA1533T/N1,518 | 功能描述:電壓模式 PWM 控制器 SMPS LOW STANDBY RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| TEA1533TD-T | 功能描述:電壓模式 PWM 控制器 SMPS LOW STANDBY GREENCHIP RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| TEA1541 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SMPS control IC with synchronization function |
| TEA1541P | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SMPS control IC with synchronization function |
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