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參數(shù)資料
| 型號(hào)： | SP6120HVEY |
| 英文描述： | High Voltage, Synchronous ,Buck Controller Ideal for 2A to 20A, High Performance, DC-DC Power Converters |
| 中文描述： | 高電壓，同步，降壓控制器適合2A至20A條，高性能，DC - DC電源轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 10/22頁(yè) |
| 文件大小： | 308K |
| 代理商： | SP6120HVEY |
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10
Date: 5/25/04
SP6120 Low Voltage, AnyFET
TM
, Synchronous, Buck Controller Copyright 2004 Sipex Corporation
TIME
3% Low
V(V
CC
)
0V
SWN
V(V
CC
)
0V
FAULT
V(V
CC
)
0V
Inductor Current
I
LOAD
0V
Error Amplifier
0V
1.25V
V
OUT
= V(Eamp REF)* (1+RF/RI)
SS Voltage
0V
0.25V
0.7V
2.0V
2.4V
dV
SS
/dt = 50
μ
A/C
SS
V(ISP) - V(ISN)
0V
250mV
V(V
CC
)
0V
0V
2.0V
SS Voltage
FAULT Voltage
2.4V
43mV
finite propagation delay of the controller. When
the SS voltage reaches 2.0V, the secondary loop
including the 3% window comparator is en-
abled. Lastly, the SS voltage is clamped at 2.4V,
ending the soft start charge cycle.
Hiccup Mode
When the converter enters a fault mode, the
driver holds the high side and low side MOSFETs
off for a finite period of time. Provided the part
is enabled, this time is set by the discharge of the
SS capacitor. The discharge time is roughly 10
times the charge interval thereby giving the
power supply plenty of time to cool during an
over current fault. The driver off-time is pre-
dominantly determined by the discharge time.
Restart will occur just like a normal soft start
cycle.
However, if a fault occurs during the soft start
charge cycle, the FAULT latch is immediately
set, turning off the high side and low side
MOSFETs. The MOSFETs remain off during
the remainder of the charge cycle and subse-
quent discharge cycle of the SS capacitor. Again,
provided there are no external fault conditions,
the FAULT latch will be reset when the SS
voltage reaches 250 mV.
Over Current Protection
The SP6120 over current protection scheme is
designed to take advantage of three popular
detection schemes: Sense Resistor, Trace Resis-
tor or Inductor Sense. Because the detection
threshold is only 43mV, both trace resistor and
inductor sense become attractive protection
schemes. The inductor sense scheme adds no
additional dc loss to the converter and is an
excellent alternative to Rdson based schemes;
providing continuous current sensing and flex-
ible MOSFET selection. An internal, 10
μ
s filter
conditions the over current signal from tran-
sients generated during load steps. In addition,
because the over current inputs, ISP and ISN,
are capable of rail to rail operation, the SP6120
provides excellent over current protection dur-
ing conditions where V
IN
approaches V
OUT
.
THEORY OF OPERATIONS: Continued
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP6120HVCY | CAPACITOR, F/TERM 6800PF 50V X8R 0805CAPACITOR, F/TERM 6800PF 50V X8R 0805; CAPACITANCE:6.8NF; VOLTAGE RATING, DC:50V; CAPACITOR DIELECTRIC TYPE:CERAMIC MULTI-LAYER; SERIES:08055F; TOLERANCE, :10%; TOLERANCE, -:10%; TEMP, OP. RoHS Compliant: Yes |
| SP6120EY | Low Voltage, AnyFETTM, Synchronous,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters |
| SP6120HV | High Voltage, Synchronous ,Buck Controller Ideal for 2A to 20A, High Performance, DC-DC Power Converters |
| SP6121 | Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
| SP6121CN | Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6120HVEY/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:High Voltage, Synchronous ,Buck Controller Ideal for 2A to 20A, High Performance, DC-DC Power Converters |
| SP6121 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters |
| SP612-10 | 制造商:Delphi Corporation 功能描述:TORSION SPRING |
| SP6121CN | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Low Voltage, 8 Pin Synchronous, Cntrllr 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 |
| SP6121CN/TR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Low Voltage, 8 Pin Synchronous, Cntrllr 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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