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參數(shù)資料
| 型號： | SC1153CSW |
| 廠商： | Semtech Corporation |
| 英文描述： | PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS |
| 中文描述： | 可編程同步DC / DC控制器的先進(jìn)的處理器 |
| 文件頁數(shù)： | 7/7頁 |
| 文件大小： | 78K |
| 代理商： | SC1153CSW |
SC1153
PROGRAMMABLE SYNCHRONOUS DC/DC
CONTROLLER FOR ADVANCED PROCESSORS
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
PRELIMINARY - October 3, 2000
7
OUTLINE DRAWING SO-20
Ref. MS-013AC
THEORY OF OPERATION
The voltage at the VOSENSE pin is applied, through the internal precision resistor feedback chain, to the inverting
input of the error amplifier. The non-inverting input of the error amplifier is supplied with a DC voltage derived by
the DAC from the internal trimmed bandgap voltage reference. The output of the error amplifier is compared to the
triangular output of the internal oscillator to generate a fixed frequency, variable duty cycle pulse train. The internal
oscillator uses an on-chip capacitor and precision trimmed current sources to set the frequency to 200kHz.
The generated pulse train is gated with the output of the current limit latch and the inhibit signal to produce a drive
signal for the upper FET. It is also inverted to produce a drive signal for the lower FET. These FET drive signals
are modified by the “shoot-through control” circuitry so that the top FET turn-on is delayed until the bottom FET has
turned off, and visa-versa.
The current limit latch is set (ending the upper FET drive pulse early) if the current limit comparator indicates an
overcurrent condition. The latch is reset at the start of each oscillator period.
The PWRGOOD and OVP signals are derived from the voltage at the VOSENSE pin by comparators fed from the
internal feedback chain.
ECN00-1346
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| SC1153CSW.TR | PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC1153CSW.TR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS |
| SC1154 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS |
| SC1154CSW | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS |
| SC1155 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Programmable Synchronous DC/DC Hysteretic Controller with VRM 9.0VID Range |
| SC1155_01 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Programmable Synchronous DC/DC Hysteretic Controller with VRM 9.0VID Range |
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