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參數(shù)資料
| 型號： | SP6120B |
| 英文描述： | Low Voltage, AnyFETTM, Synchronous ,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters |
| 中文描述： | 低電壓，AnyFETTM，同步，降壓控制器適合2A至10A條，高性能，DC - DC電源轉(zhuǎn)換器 |
| 文件頁數(shù)： | 13/22頁 |
| 文件大?。?/td> | 304K |
| 代理商： | SP6120B |
13
Date: 5/25/04
SP6120B Low Voltage, AnyFET
TM
, Synchronous, Buck Controller Copyright 2004 Sipex Corporation
GATE DRIVER TEST CONDITONS
5V
90%
10%
GH (GL)
2V
5V
GH (GL)
2V
NON-OVERLAP
RISE TIME
FALL TIME
90%
10%
V(BST)
0V
GH
V(V
CC
)
0V
GL
V(V
CC
= V
IN
)
SWN
~0V
~V(Diode) V
~2V(V
IN
)
BST
~V(V
IN
)
TIME
current valley and the reset pulse corresponding
to the end of an on-time indicates a current peak.
In effect, the main loop determines the status of
the secondary loop.
Notice that the output voltage appears to coast
toward the regulated value during periods where
the main loop would be telling the drivers to
switch. It is during this interval that the 3%
window comparator has taken control away from
the main loop. The main loop regains control
only if the output voltage crosses through its
regulated value. Also notice where the 3% com-
parator takes over. The output voltage is consid-
ered “high” only if the trough of the ripple is
above 3%. The output voltage is considered
“l(fā)ow” only if the peak of the ripple is below 3%.
By managing the secondary loop in this fashion,
the SP6120B can improve the transient response
of high performance power converters without
causing strange disturbances in low to moderate
performance systems.
Driver Logic
Signals from the PWM latch (QPWM), Fault
latch (FAULT), Program Logic, Zero Crossing
Comparator, and 3% Window Comparators all
flow into the Driver Logic. The following is a
truth table for determining the state of the GH and
GL voltages for given inputs:
E
L
B
A
T
H
T
U
R
T
C
G
O
L
R
E
V
D
T
L
U
A
F
1
1
0
0
0
0
0
0
0
0
r
M
M
O
W
C
P
Q
3
P
%
X
X
1
1
0
0
0
0
0
0
T
E
F
P
E
F
N
N
P
N
P
N
P
N
P
N
P
C
S
N
O
C
X
X
X
X
C
C
D
D
D
D
S
S
O
R
C
O
R
E
Z
X
X
X
X
X
X
0
0
1
1
H
G
0
1
1
0
0
1
0
1
0
1
L
G
0
0
0
0
1
1
1
1
0
0
The QPWM and 3% Comparators are grouped
together because 3% Low is the same as QPWM
= 1 and 3% High is the same as QPWM = 0.
Output Drivers
The driver stage consists of one high side, 4
driver, GH and one low side, 4
, NFET driver,
GL. As previously stated, the high side driver can
be configured to drive a PFET or an NFET high
side switch. The high side driver can also be
configured as a switch node referenced driver.
Due to voltage constraints, this mode is mandatory
for 5V, single supply, high side NFET applica-
tions. The following figure shows typical driver
waveforms for the 5V, high side NFET design.
As with all synchronous designs, care must be
taken to ensure that the MOSFETs are properly
chosen for non-overlap time, peak current capa-
bility and efficiency.
Secondary Loop (3% Window Comparator):
continued
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP6120BCY | Low Voltage, AnyFETTM, Synchronous ,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters |
| SP6120BEY | Low Voltage, AnyFETTM, Synchronous ,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters |
| SP6120CY | Low Voltage, AnyFETTM, Synchronous ,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters |
| SP6120HVEY | High Voltage, Synchronous ,Buck Controller Ideal for 2A to 20A, High Performance, DC-DC Power Converters |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6120BCY | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, AnyFETTM, Synchronous ,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters |
| SP6120BCY/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, AnyFETTM, Synchronous ,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters |
| SP6120BCY-L | 功能描述:DC/DC 開關(guān)控制器 Low Voltage, AnyFET Synchronous, Cntrllr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| SP6120BCY-L/TR | 功能描述:DC/DC 開關(guān)控制器 Low Voltage, AnyFET Synchronous, Cntrllr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| SP6120BEY | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, AnyFETTM, Synchronous ,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters |
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