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| 型號(hào)： | TSM112CDT |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁(yè)數(shù)： | 9/17頁(yè) |
| 文件大?。?/td> | 148K |
| 代理商： | TSM112CDT |
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TSM111
9/17
AN EXAMPLE OF 90W MICRO ATX POWER
SUPPLY USING L5991A, VIPER20 AND
TSM111
Protection against accidental short circuits and
fault conditions is mandatory in PC power sup-
plies. These protection circuits can be realized by
using many discrete components which occupy a
lot of PCB space, design time infine tuning the cir-
cuit and also add to assembling costs.
ST’s single chip TSM111 IC provides complete
protection circuits design easier, with fewer num-
ber of components. TSM111 is an ideal supervisor
IC for PC power supplies.
The salient features and benefits of this deviceare
listed below :
a) Over voltage protection for 3.3V, 5V and 12V
without external component.
b) Over current protection for 3.3V, 5V and 12V.
c) Generates Power Good signal.
d) Programmable timing for Power Good signal.
e) Wide range supply operating voltage up to 36V
(44V AMR).
f) Stable internal voltage reference.
g) Two 1.6% voltage reference for Main and Aux-
iliary regulation.
h) Few external components.
i) Circuit occupies little space on PCB.
j) Easy implementation of the circuit.
FEATURE DESCRIPTIONS
a) Over voltage protection can be implemented
without any additional components. Overvoltage
sense levels for 3.3V, 5V, 12V are 4V, 6.1V, 14.2V
respectively. With very little tolerances, better pro-
tection is achieved.
b) Over current protection can be implemented
with very small value sense resistors. As the cur-
rent sense threshold levels are set very low, regu-
lation is not affected. The currentsense threshold
levels for 3.3V, 5V, 12V are 50mV, 50mV and
65mV respectively.
c) The power good signal (pin9) is asserted to in-
dicate the 5V and 3.3V is above the under voltage
threshold level. PG pin goes high when the above
condition is reached. Pull up resistor R27 (3.1K) is
connected to 5V STDBY supply from this pin.
d) The timing of the powergood signal can be con-
trolled by adjusting the value of the charging ca-
pacitor on pin 10. With 2.2
μ
F/16V capacitor on pin
10, 400msec turn on delay is achieved.
e) The power supply can be operated from 14.5V
to 36V. The VCC must always be higher than the
supply voltage on the 12V input pin by 2V .i.e. if
14V is appearing 12V input pin the Vcc must be >
16V.
f) Two internal high precision TL431 shunt regula-
tors are built-in. It provides stable reference volt-
ages with a voltage precision of 1.6%.
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| TSM121CN | Analog IC |
| TSM1 | Analog IC |
| SAM1 | Analog IC |
| TSM221IDT | Voltage-Feedback Operational Amplifier |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TSM112CN | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Over/Under Volt Prot 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 |
| TSM112D | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V 5V 12V HOUSEKEEPING IC |
| TSM112N | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V 5V 12V HOUSEKEEPING IC |
| TSM-113-01-F-DH | 制造商:Samtec Inc 功能描述:CONN UNSHRD HDR HDR 26 POS 2.54MM SLDR RA SMD - Bulk |
| TSM-113-01-F-DH-A | 制造商:Samtec Inc 功能描述:CONN UNSHRD HDR HDR 26 POS 2.54MM SLDR RA SMD - Bulk |
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