- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383164 > ISL6721AVZ (INTERSIL CORP) Flexible Single Ended Current Mode PWM Controller PDF資料下載
參數(shù)資料
| 型號： | ISL6721AVZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Flexible Single Ended Current Mode PWM Controller |
| 中文描述： | 1 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 4.40 MM, ROHS COMPLIANT, PLASTIC, MO-153AB, TSSOP-16 |
| 文件頁數(shù)： | 16/20頁 |
| 文件大小： | 481K |
| 代理商： | ISL6721AVZ |
16
the remaining pole and zero for the compensator are located
at:
The ratio of R15 to the parallel combination of R17 and R18
determine the mid band gain of the error amplifier.
From (EQ. 27), it can be seen that the control to output
transfer function frequency dependence is a function of the
output load resistance, the value of output capacitance, and
the output capacitance ESR. These variations must be
considered when compensating the control loop. The worst
case small signal operating point for the converter is at
minimum Vin, maximum load, maximum Cout, and minimum
ESR.
The higher the desired bandwidth of the converter, the more
difficult it is to create a solution that is stable over the entire
operating range. A good rule of thumb is to limit the
bandwidth to about Fsw/4. For this example, the bandwidth
will be further limited due to the low GBWP of the LM431-
based Error Amplifier and the opto-coupler. A bandwidth of
approximately 5kHz was selected.
For the EA compensation, the first pole is placed at the origin
by default (C14 is an integrating capacitor). The first zero is
placed below the crossover frequency, f
co
, usually around
1/3 f
co
. The second pole is placed at the lower of the ESR
zero or at one half of the switching frequency. The midband
gain is then adjusted to obtain the desired crossover
frequency. If the phase margin is not adequate, the
crossover frequency may have to be reduced.
Using this technique to determine the compensation, the
following values for the EA components were selected.
R17 = R18 = R15 = 1k
R20 = open
C13 = 100nF
C14 = 100pF
A Bode plot of the closed loop system at low line, max load
appears below.
f
pc
C
R
15
C
14
2
π
C
13
---------------------------+
2
π
R
15
C
14
--------------------------------------------
≈
=
(EQ. 28)
f
zc
2
π
R
15
C
13
--------------------------------------------
=
(EQ. 29)
A
midband
R
-----------------------------------------------
R
R
+
(
)
R
17
R
18
=
(EQ. 30)
0.01
0.1
Frequency (kHz)
1
10
100
50
40
-50
30
-40
20
-30
10
-20
0
10
20
30
40
50
G
FIGURE 9A. GAIN
50
40
30
20
10
0
-10
G
FIGURE 9B. PHASE MARGIN
0.01
0.1
Frequency (kHz)
1
1
10
100
100
50
0
50
100
150
200
P
0
P
ISL6721
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6721 | Flexible Single Ended Current Mode PWM Controller(靈活的單端電流模式PWM控制器) |
| ISL6722A | 1024 x 9 x 2 Asynchronous Bidirectional FIFO Memory 44-PLCC 0 to 70 |
| ISL6723AABZ | Flexible Single Ended Current Mode PWM Controllers |
| ISL6722AABZ | 1024 x 9 x 2 Asynchronous Bidirectional FIFO Memory 64-TQFP 0 to 70 |
| ISL6722AAVZ | Flexible Single Ended Current Mode PWM Controllers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6721AVZ-T | 功能描述:IC REG CTRLR PWM CM 16-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6721EVAL1 | 功能描述:EVALUATION BOARD ISL6721 RoHS:否 類別:RF/IF 和 RFID >> RF 評估和開發(fā)套件，板 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:GPS 接收器 頻率:1575MHz 適用于相關(guān)產(chǎn)品:- 已供物品:模塊 其它名稱:SER3796 |
| ISL6721EVAL3Z | 功能描述:EVAL BOARD 3 FOR ISL6721 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 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 |
| ISL6722AABZ | 功能描述:IC REG CTRLR PWM CM 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6722AABZ-T | 功能描述:IC REG CTRLR PWM CM 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。