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參數(shù)資料
| 型號： | ISL6741IV |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Flexible Double Ended Voltage and Current Mode PWM Controllers |
| 中文描述： | 0.5 A SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, MO-153-AB, TSSOP-16 |
| 文件頁數(shù)： | 26/29頁 |
| 文件大?。?/td> | 639K |
| 代理商： | ISL6741IV |
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26
The actual loop gain and phase margin measured on the
ISL6740EVAL2 demonstration board appear below:
The only major discrepancies between the predicted
behavior and the measured results are the Q of the L-C filter
and the phase behavior above 60kHz. The actual Q appears
to be significantly less than predicted resulting in less gain
peaking and a less rapid phase shift near the resonant
frequency. This is most likely the result of neglecting other
losses in the converter’s output, such as the FET on
resistance, copper losses, and inductor resistance. The
phase discrepancy above 60kHz is not particularly relevant
to the loop performance since it occurs well above the cross
over frequency. The predicted behavior indicates a much
gentler drop off of phase than was observed in the measured
performance. The discrepancy was not investigated.
Performance
The major performance criteria for the converter are
efficiency and load regulation. These quantities are detailed
in the following Figures.
The efficiency, although very good, could be further
improved using a controlled SR method instead of using a
self-driven method with an auxiliary schottky diode. The
schottky diode conducts when the main switching FETs are
off. Its forward voltage drop is considerably larger than that
of the SR FETs and causes a measurable reduction in
efficiency. The effect becomes more significant as the input
voltage is increased due to the reduction of duty cycle (and
consequent increase in the OFF time).
FIGURE 26A. MEASURED LOOP GAIN
0.1
1
10
100
-50
-40
-30
-20
-10
0
10
20
30
40
50
FREQUENCY (kHz)
G
FIGURE 26B. MEASURE LOOP PHASE MARGIN
0.1
1
10
100
-135
-90
-45
0
45
90
135
180
225
FREQUENCY (kHz)
P
FIGURE 27. EFFICIENCY vs LOAD V
IN
= 48V
t
2
3
4
5
6
7
8
9
10
85
87
89
91
93
95
LOAD CURRENT (A)
E
FIGURE 28. LOAD REGULATION AT V
IN
= 48V
0
1
2
3
4
5
6
7
8
9
10
11.995
12
12.005
12.01
12.015
LOAD CURRENT (A)
O
ISL6740, ISL6741
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6740 | Flexible Double Ended Voltage and Current Mode PWM Controllers |
| ISL6740IB | Flexible Double Ended Voltage and Current Mode PWM Controllers |
| ISL6740IV | Octal Buffers/Drivers With 3-State Outputs 20-SSOP -40 to 85 |
| ISL6741 | Flexible Double Ended Voltage and Current Mode PWM Controllers(靈活的雙端電壓和電流模式PWM控制器) |
| ISL6845IB | Improved Industry Standard Single Ended Current Mode PWM Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6741IV-T | 功能描述:IC REG CTRLR PWM CM 16-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 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:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁面:1316 (CN2011-ZH PDF) |
| ISL6741IVZ | 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) |
| ISL6741IVZ-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) |
| ISL6742AAZA | 功能描述:IC REG CTRLR PWM CM/VM 16-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:75 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.3 V ~ 13.5 V 降壓:是 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:0°C ~ 70°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:管件 產(chǎn)品目錄頁面:1051 (CN2011-ZH PDF) 其它名稱:296-2543-5 |
| ISL6742AAZA-T | 功能描述:IC REG CTRLR PWM CM/VM 16-QSOP 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) |
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