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| 型号： | ISL6740IBZ |
| 厂商： | INTERSIL CORP |
| 元件分类： | 稳压器 |
| 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 |
| 封装： | ROHS COMPLIANT, PLASTIC, MS-012-AC, SOIC-16 |
| 文件页数： | 19/29页 |
| 文件大小： | 635K |
| 代理商： | ISL6740IBZ |
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26
FN9111.4
July 13, 2007
The actual loop gain and phase margin measured on the
ISL6740EVAL2Z demonstration board appear in Figures 26A
and 26B:
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
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
0.1k
1k
10k
100k
-50
-40
-30
-20
-10
0
10
20
30
40
50
FREQUENCY (Hz)
GA
IN
(
d
B)
FIGURE 26B. MEASURE LOOP PHASE MARGIN
0.1k
1k
10k
100k
-135
-90
-45
0
45
90
135
180
225
FREQUENCY (Hz)
P
HASE
MARGIN
(°
)
FIGURE 27. EFFICIENCY vs LOAD VIN = 48Vt
23
45
67
8
9
10
85
87
89
91
93
95
LOAD CURRENT (A)
EF
FIC
IEN
C
Y
(%
)
FIGURE 28. LOAD REGULATION AT VIN = 48V
012
345
6789
10
11.995
12.000
12.005
12.010
12.015
LOAD CURRENT (A)
O
U
TP
U
T
VO
LTAG
E
(V
)
ISL6740, 1SL6741
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6740IBZ-T | 功能描述:IC REG CTRLR PWM VM 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6740IV | 功能描述:IC REG CTRLR PWM VM 16-TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 产品目录页面:1316 (CN2011-ZH PDF) |
| ISL6740IV-T | 功能描述:IC REG CTRLR PWM VM 16-TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 产品目录页面:1316 (CN2011-ZH PDF) |
| ISL6740IVZ | 功能描述:电压模式 PWM 控制器 VOLT PWM MODE CONTRL 16LD TSSOP RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| ISL6740IVZ-T | 功能描述:IC REG CTRLR PWM VM 16-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
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