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參數(shù)資料
| 型號： | SP6120HV |
| 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 |
| 文件頁數(shù)： | 8/22頁 |
| 文件大?。?/td> | 308K |
| 代理商： | SP6120HV |
8
Date: 5/25/04
SP6120 Low Voltage, AnyFET
TM
, Synchronous, Buck Controller Copyright 2004 Sipex Corporation
General Overview
The SP6120 is a constant frequency, voltage
mode PWM controller for low voltage, DC/DC
step down converters. It has a main loop where
an external resistor (R
OSC
) sets the frequency
and the driver is controlled by the comparison of
an error amp output (COMP) and a 1V ramp
signal. The error amp has a transconductance of
600
μ
S, an output impedance of 3 M
, an inter-
nal pole at 2 MHz and a 1.25V reference input.
Although the main control loop is capable of 0%
and 100% duty cycle, its response time is lim-
ited by the external component selection. There-
fore, a secondary loop, including a window
comparator positioned 3% above and below the
reference, has been added to insure fast re-
sponse to line and load transients. A unique
“Ripple & Frequency Independent” algorithm,
added to the secondary loop, insures that the
window comparator does not interfere with the
main loop during normal operation. In addition
to receiving driver commands from the main
and secondary loops, the Driver Logic is also
controlled by the Programming Logic, Fault
Logic and Zero Crossing Comparator. The Pro-
gramming Logic tells the Driver Logic whether
the controller is using a PFET or NFET high side
Figure 14. V
CC
Start Threshold vs. Temperature
Figure 15. V
CC
Stop Threshold vs. Temperature
Figure 16. Oscillator Frequency vs. Temperature
Figure 17. Oscillator Frequency vs. R
OSC
with V
CC
= 5V
and CGH = CGL = Open.
2.900
-40
-15
10
35
60
85
V
C
Temperature (
°
C)
2.875
2.850
2.825
2.800
2.850
-40
-15
10
35
60
85
V
C
Temperature (
°
C)
2.825
2.800
2.775
2.750
302
-40
-15
10
35
60
85
F
Temperature (
°
C)
301
300
299
298
200
300
400
500
600
700
800
5
10
15
20
25
30
F
R
OSC
(k
)
TYPICAL PERFORMANCE CHARACTERISTICS: Continued
Unless otherwise specified: V
CC
= BST = ENABLE = 3.3V, R
OSC
= 18.7k, C
COMP
= 0.1
μ
F, C
SS
= 0.1
μ
F, CGH = CGL = 3.3nF, V
FB
= 1.25V,
ISP = ISN = 1.25V, SWN = GND = PGND = 0V, T
AMB
= 25
°
C.
THEORY OF OPERATIONS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6120HVCY | 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 |
| SP6120HVCY/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 |
| SP6120HVEY | 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 |
| 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 |
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