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参数资料
| 型号： | 750106 |
| 厂商： | Wurth Electronics Inc |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR LT3575 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，隔离 |
| 功率 - 输出： | 10W |
| 输出电压： | 5V |
| 电流 - 输出： | 2A（最小值） |
| 输入电压： | 10 ~ 28 VDC |
| 稳压器拓扑结构： | 回扫 |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | LT3575 |
| 相关产品： | LT3575IFE#TRPBF-ND - IC REG FLYBACK ISO ADJ 16TSSOP LT3575IFE#PBF-ND - IC REG FLYBACK ISO ADJ 16TSSOP LT3575EFE#TRPBF-ND - IC REG FLYBACK ISO ADJ 16TSSOP LT3575EFE#PBF-ND - IC REG FLYBACK ISO ADJ 16TSSOP |
| 其它名称： | 732-3306 |
LT3575
APPLICATIONS INFORMATION
Table 2. Common Resistor Values for 2:1 Transformers
predict output power. In addition, the winding ratio can
V OUT (V)
3.3
5
12
15
N PS
2.00
2.00
2.00
2.00
R FB (kΩ)
37.4
56
130
162
R REF (kΩ)
6.04
6.04
6.04
6.04
R TC (kΩ)
18.7
28
66.5
80.6
be changed to multiply the output current at the expense
of a higher switch voltage.
The graphs in Figures 1-3 show the maximum output
power possible for the output voltages 3.3V, 5V, and 12V.
The maximum power output curve is the calculated output
Table 3. Common Resistor Values for 3:1 Transformers
power if the switch voltage is 50V during the off-time. To
achieve this power level at a given input, a winding ratio
V OUT (V)
3.3
5
10
N PS
3.00
3.00
3.00
R FB (kΩ)
56.2
80.6
165
R REF (kΩ)
6.04
6.04
6.04
R TC (kΩ)
20
28.7
54.9
value must be calculated to stress the switch to 50V,
resulting in some odd ratio values. The curves below are
examples of common winding ratio values and the amount
of output power at given input voltages.
Table 4. Common Resistor Values for 4:1 Transformers
V OUT (V) N PS R FB (kΩ) R REF (kΩ) R TC (kΩ)
3.3 4.00 76.8 6.04 19.1
5 4.00 113 6.04 28
Output Power
A ?yback converter has a complicated relationship between
the input and output current compared to a buck or a
boost. A boost has a relatively constant maximum input
current regardless of input voltage and a buck has a
relatively constant maximum output current regardless of
input voltage. This is due to the continuous nonswitching
behavior of the two currents. A ?yback converter has both
discontinuous input and output currents which makes it
similar to a nonisolated buck-boost. The duty cycle will
affect the input and output currents, making it hard to
One design example would be a 5V output converter with
a minimum input voltage of 20V and a maximum input
voltage of 30V. A three-to-one winding ratio ?ts this design
example perfectly and outputs close to ten watts at 30V
but lowers to eight watts at 20V.
TRANSFORMER DESIGN CONSIDERATIONS
Transformer speci?cation and design is perhaps the most
critical part of successfully applying the LT3575. In addition
to the usual list of caveats dealing with high frequency
isolated power supply transformer design, the following
information should be carefully considered.
Linear Technology has worked with several leading magnetic
component manufacturers to produce pre-designed ?yback
transformers for use with the LT3575. Table 5 shows the
details of several of these transformers.
10:1
14
12
10
MAX P OUT
7:1
5:1
4:1
MAXIMUM
OUTPUT
POWER
14
12
10
MAX P OUT
7:1
5:1
4:1
3:1
MAXIMUM
OUTPUT
POWER
14
MAXIMUM
OUTPUT
12 POWER
10
2:1
MAX P OUT
8
3:1
8
2:1
8
3:1
1:1
6
2:1
6
6
1:1
4
2
0
1:1
4
2
0
4
2
0
0
5
10
15
20
25
30
35
40
45
0
5
10
15
20
25
30
35
40
45
0
5
10
15
20
25
30
35
40
INPUT VOLTAGE (V)
3575 F01
INPUT VOLTAGE (V)
3573 F02
INPUT VOLTAGE (V)
3573 F03
Figure 1. Output Power for 3.3V Output
Figure 2. Output Power for 5V Output
Figure 3. Output Power for 12V Output
3575f
10
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相关代理商/技术参数 |
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| 750-106 | 制造商:GLENAIR 制造商全称:Glenair, Inc. 功能描述:Pre-Terminated Assemblies |
| 750107 | 功能描述:BOARD EVAL FOR LT3748 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
| 7501078 | 制造商:ARK-LES CONNECTORS 功能描述:.240 SQUARED RING TERMINAL 16-14 AWG 6 STUD SIZE |
| 750108 | 功能描述:BOARD EVAL FOR LT3748 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
| 750109 | 制造商:Pilz International 功能描述:CONTACT MODULE 3NO/1NC 24V 制造商:PILZ 功能描述:CONTACT MODULE, 3NO/1NC, 24V, 30OHM 制造商:PILZ 功能描述:CONTACT MODULE, 3NO/1NC, 24V, 30OHM; Coil Voltage VDC Nom:24V; Contact Current Max:6A; Contact Voltage AC Nom:240V; Contact Voltage DC Max:24V; Coil Resistance:30ohm; Contact Configuration:3PST-NO, SPST-NC; Average Power ;RoHS Compliant: Yes |
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