- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383143 > ISL6232CAZA-T (INTERSIL CORP) High Efficiency System Power Supply Controller for Notebook Computers PDF資料下載
參數(shù)資料
| 型號(hào)： | ISL6232CAZA-T |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Efficiency System Power Supply Controller for Notebook Computers |
| 中文描述： | 2 A DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | ROHS COMPLIANT, PLASTIC, QSOP-28 |
| 文件頁數(shù)： | 23/25頁 |
| 文件大小： | 746K |
| 代理商： | ISL6232CAZA-T |
23
FN9116.0
April 18, 2005
Figure 33 shows the type II compensator and its transfer
function is expressed as follows:
where
Compensator design goal:
High DC gain
Loop bandwidth f
c
:
Gain margin: >10dB
Phase margin: 40°
The compensator design procedure is as follows:
Put compensator zero
Put one compensator pole at zero frequency to achieve high
DC gain, and put another compensator pole at either esr
zero frequency or half switching frequency, whichever is
lower.
ω
CZ2
is an internal zero due to 8pF and 600k
.
The loop gain T
v
(S) at cross over frequency of f
c
has unity
gain. Therefore, the compensator resistance R
1
is
determined by
where g
m
is the trans-conductance of the voltage error
amplifier. Compensator capacitor C1 is then given by
Example: V
in
= 12V, V
o
= 5V, I
o
= 5A, fs = 300kHz,
C
o
= 180
μ
F/12m
, L = 6.8
μ
H, g
m
= 100
μ
S, R
T
= 0.128
(R
cs
= 8m
, A
c
= 16), V
FB
= 0.8V, S
e
= 1.5
×
10
5
V/s,
S
n
= 1.318
×
10
5
V/s, f
c
= 45kHz, then compensator
resistance R
1
= 400k
.
Put the compensator zero at 1.5kHz (~1.5x C
o
R
o)
, and put
the compensator pole at esr zero which is 49kHz. The
compensator capacitors are:
C
1
= 270pF, C
2
= 10pF (There is approximately 8pF
parasitic capacitance from V
COMP
to GND; Therefore, C2
optional).
Figure 34 shows the simulated voltage loop gain. It is shown
that it has 30kHz loop bandwidth with 85
°
phase margin and
20dB gain margin.
FIGURE 34. SIMULATED LOOP GAIN
12V Auxiliary Supply
A flyback transformer, or coupled inductor can be substituted
for the inductor in 5V or 3.3V supply to generate an 12V
auxiliary output as shown in Figure 35, which can be used to
drive N-channel MOSFETs. The ISL6232 is particularly well
suited for such applications because it can be configured in
ultrasonic or forced PWM mode to ensure good load
regulation when the main supplies are in light load
-
+
R1
Vo
GM
C2
C1
VREF
VFB
VCOMP
FIGURE 33. TYPE II COMPENSATOR
C3
R2
S
)
v
v
FB
----
g
1
C
2
---------+
1
------------
+
---------------------------------------------------------
1
------------
+
S 1
ω
cp
---------
+
=
=
(EQ. 28)
ω
cz1
1
1
--------------
ω
cz2
2
3
--------------
=
ω
cp
,
C
1
1
2
C
2
+
----------------------
=
,
=
1
4
--
to1
------
f
s
ω
cz1
1to3
(
)
o
o
--------------
=
R
1
2
π
f
V
C
R
T
m
FB
-----------------------------------
=
(EQ. 29)
C
1
1
cz
-----------------
C
2
1
esr
------------------------
=
,
=
(EQ. 30)
100
1·10
3
1·10
4
1·10
5
1·10
6
-60
-40
-20
0
20
40
60
G
-40
100
-15
10
35
60
85
110
P
o
)
V
LOOP
1·10
3
1·10
4
1·10
5
1·10
6
V
LOOP
FREQUENCY (Hz)
ISL6232
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6232CAZA | High Efficiency System Power Supply Controller for Notebook Computers |
| ISL6235 | Octal D-Type Transparent Latches With 3-State Outputs 20-SOIC -40 to 85 |
| ISL6235CA | Octal D-Type Transparent Latches With 3-State Outputs 20-SOIC -40 to 85 |
| ISL6244CR | Octal D-Type Transparent Latches With 3-State Outputs 20-SOIC -40 to 85 |
| ISL6244HR-T | Test Probe; Range:-32deg to 500degF RoHS Compliant: NA |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6232CAZ-T | 制造商:Intersil Corporation 功能描述:LEAD-FREE HI EFFICIENCY SYSTEM PWR SUPPLY CONTR FOR NOTEBOOK - Tape and Reel |
| ISL6232EVAL1 | 功能描述:EVALUATION BOARD 1 ISL6232 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6235 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Advanced Triple PWM Only Mode and Dual Linear Power Controller for Portable Applications |
| ISL6235CA | 制造商:Rochester Electronics LLC 功能描述:SYSTEM ELECTRONICS REGULATOR FOR LCD-PC - Bulk |
| ISL6235CA-T | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。