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| 型号： | LT3748HMS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/30页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBK ISO CM 16MSOP |
| 产品培训模块： | LT3748 100V Flyback Controller |
| 标准包装： | 37 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 电源电压： | 5 V ~ 100 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： | -40°C ~ 150°C |
| 封装/外壳： | 16-TFSOP（0.118"，3.00mm），12 引线 |
| 包装： | 管件 |
| 配用： | 732-3308-ND - BOARD EVAL FOR LT3748 732-3305-ND - BOARD EVAL FOR LT3748 |
| 相关产品： | 732-2669-2-ND - TRANS FLYBACK LT3748 20UH SMD 732-2669-6-ND - TRANS FLYBACK LT3748 20UH SMD 732-2668-6-ND - TRANS FLYBACK LT3748 14UH SMD 732-2667-6-ND - TRANS FLYBACK LT3748 500UH SMD 732-2666-6-ND - TRANS FLYBACK LT3748 12UH SMD 732-2665-6-ND - TRANS FLYBACK LT3748 12UH SMD 732-2664-6-ND - TRANS FLYBACK LT3748 15UH SMD 732-2663-6-ND - TRANS FLYBACK LT3748 15UH SMD 732-2662-6-ND - TRANS FLYBACK LT3748 8UH SMD 732-2661-6-ND - TRANS FLYBACK LT3748 8UH SMD 更多... |
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LT3748
APPLICATIONS INFORMATION
Table 1. Pre-Designed Transformers—Typical Specifications Unless Otherwise Noted
TRANSFORMER
L PRI
L LEAK
N PS
I SAT
R PRI
R SEC
TARGET APPLICATION ?
PART NUMBER
750311424
750311456*
750311439
750311423
750311457
750311689
750311458*
750311564
750311624
750311604
750311599
750311600
750311608
750311607
750311590
750311591
750311592
750311594
750311595
750311596
PA2367NL
PA1276NL
PA2467NL
PA1260NL
PA3177NL
Size (W x L x H) mm
17.7 × 14.0 × 12.7
17.7 × 14.0 × 12.7
17.7 × 14.0 × 12.7
17.7 × 14.0 × 12.7
17.7 × 14.0 × 12.7
17.7 × 14.0 × 12.7
17.7 × 14.0 × 12.7
17.7 × 14.0 × 12.7
17.7 × 14.0 × 12.7
29.08 × 23.11 × 11.43
29.08 × 23.11 × 11.43
29.08 × 23.11 × 11.43
29.08 × 23.11 × 11.43
29.08 × 23.11 × 11.43
32.31 × 27.03 × 13.69
32.31 × 27.03 × 13.69
32.31 × 27.03 × 13.69
32.31 × 27.03 × 13.69
32.31 × 27.03 × 13.69
32.31 × 27.03 × 13.69
17.7 × 14.0 × 12.7
17.7 × 14.0 × 12.7
17.7 × 14.0 × 12.7
17.7 × 14.0 × 12.7
29.21 × 21.84 × 11.43
(μH)
100
100
37
50
50
50
15
9
9
8
8
12
12
14
8
8
8
15
12
12
85
77.4
37
77.4
8.3
(nH)
844
900
750
570
600
600
175
120
150
300
500
500
500
500
200
200
200
400
200
200
750
800
750
800
100
(N P :N S )
3:1
3:1
2:1
4:1
4:1
4:1
3:1
3:1
1.5:1
1:1
1.5:1
3:1
1.5:1
2.5:1
2:1
1.5:1
1:1
2.33:1
3:1
1.5:1
2.7:1
1.47:1
2:1
3.67:1
2:1
(A)
3
2.4
2.8
4
3.7
3.7
5
8
8
9.5
12
11
9
9.5
18
20
18
18
18
16
1.7
1.6
2.9
1.5
8.6
(mΩ)
180
225
89
90
115
115
35
36
34
30
30
30
30
40
15
15
15
35
15
30
325
100
89
220
10
(mΩ)
29
31
28
12
12
12
6
7
21
12
12
40
20
10
8
12
20
15
12
30
26
75
28
18
7
MANUFACTURER
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Würth Electronics
Pulse Engineering
Pulse Engineering
Pulse Engineering
Pulse Engineering
Pulse Engineering
INPUT (V)
40 to 75
40 to 75
30 to 75
30 to 75
30 to 75
30 to 75
10 to 40
10 to 40
10 to 40
10 to 40
10 to 40
20 to 75
20 to 75
20 to 75
10 to 40
10 to 40
10 to 40
20 to 75
20 to 70
20 to 70
20 to 75
20 to 75
20 to 75
20 to 75
10 to 40
OUTPUT
12V/1A
12V/1A
12V/1A
5V/3A
5V/3A
5V/3A
5V/2.5A
5V/3A
15V/1A
24V/1.3A
15V/2A
15V/2A
24V/1.3A
12V/2.5A
12V/3.8A
15V/3A
24V/1.9A
12V/3.8A
15V/3A
24V/1.9A
12V/1A
12V/1A
12V/1A
5V/2A
10V/2.5A
*2.5k isolation, others are rated for 1.5kV isolation.
? TARGET APPLICATION, NOT GUARANTEED.
Turns Ratio and RMS Diode Current
Note that when using an R FB /R REF resistor ratio to set
output voltage, the user has relative freedom in selecting
a transformer turns ratio to suit a given application. In
contrast, simpler ratios of small integers (e.g., 1:1, 2:1,
3:2, etc.) can be employed to provide more freedom in
setting total turns and mutual inductance.
While the turns ratio can be selected to maximize output
power for a given current limit, minimizing the turns
ratio and increasing the current limit will often increase
efficiency and better utilize the saturation current of a
given transformer. Figure 3 shows the maximum output
power using three transformers with different windings
ratios that have the same output inductance and peak
output current, illustrating that increasing current while
decreasing turns ratio can deliver more power.
There are two significant constraints on the turns ratio.
First, as described in the previous section on limitations
to output power, the drain of the MOSFET switch will
see a voltage equal to the maximum input supply plus
3748fa
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3748HMSTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:100V Isolated Flyback Controller |
| LT3748IMS#PBF | 功能描述:IC REG CTRLR FLYBK ISO CM 16MSOP RoHS:是 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:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT3748IMS#TRPBF | 功能描述:IC REG CTRLR FLYBK ISO CM 16MSOP RoHS:是 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:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT3748IMSPBF | 制造商:Linear Technology 功能描述:100V Isolated Flyback Controller MSOP16 |
| LT3748IMSTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:100V Isolated Flyback Controller |
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