- 您现在的位置：买卖IC网 > PDF目录1825 > LT3574IMS#TRPBF (Linear Technology)IC REG FLYBK ISO ADJ .65A 16MSOP PDF资料下载
参数资料
| 型号： | LT3574IMS#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 15/24页 |
| 文件大小： | 0K |
| 描述： | IC REG FLYBK ISO ADJ .65A 16MSOP |
| 标准包装： | 2,500 |
| 类型： | 回扫，隔离 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 60V |
| 输入电压： | 3 V ~ 40 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 40kHz ~ 1MHz |
| 电流 - 输出： | 650mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TFSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-MSOP |
| 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... |
LT3574
APPLICATIONS INFORMATION
N P
50 ? V IN ( MAX )
+ V
I OUT ( MAX ) = 0 . 8 ? ( 1 ? D ) ?
NI PK
D =
OverdrivingtheBIASPinwithaThirdWinding
The LT3574 provides excellent output voltage regulation
without the need for an opto-coupler, or third winding, but
for some applications with higher input voltages (>20V),
it may be desirable to add an additional winding (often
called a third winding) to improve the system efficiency.
For proper operation of the LT3574, if a winding is used as
a supply for the BIAS pin, ensure that the BIAS pin voltage
is at least 3.15V and always less than the input voltage.
For a typical 24V IN application, overdriving the BIAS pin
will improve the efficiency gain 4% to 5%.
Loop Compensation
The LT3574 is compensated using an external resistor-
capacitor network on the VC pin. Typical values are in the
range of R C = 50k and C C = 1nF (see the numerous sche-
matics in the Typical Applications section for other possible
values). If too large of an R C value is used, the part will be
more susceptible to high frequency noise and jitter. If too
small of an R C value is used, the transient performance will
suffer. The value choice for C C is somewhat the inverse
of the R C choice: if too small a C C value is used, the loop
may be unstable, and if too large a C C value is used, the
transient performance will also suffer. Transient response
plays an important role for any DC/DC converter.
Design Example
The following example illustrates the converter design
process using LT3574.
Given the input voltage of 20V to 28V, the required output
is 5V, 0.5A.
1. Select the transformer turns ratio to accommodate
the output.
The output voltage is reflected to the primary side by a
factor of turns ratio N. The switch voltage stress V SW is
expressed as:
N =
N S
V SW ( MAX ) = V IN + N ( V OUT + V F ) < 50 V
or rearranged to:
N <
( V OUT F )
On the other hand, the primary-side current is multiplied by
the same factor of N. The converter output capability is:
1
2
N ( V OUT + V F )
V IN + N ( V OUT + V F )
The transformer turns ratio is selected such that the con-
verter has adequate current capability and a switch stress
below 50V. Table 6 shows the switch voltage stress and
output current capability at different transformer turns
ratio.
Table 6. Switch Voltage Stress and Output Current Capability vs
Turns Ratio
V SW(MAX) AT V IN(MAX) I OUT(MAX) AT V IN(MIN) DUTY CYCLE
N (V) (A) (%)
V IN(MIN) = 20V, V IN(MAX) = 28V, V OUT = 5V, V F = 0.5V
and I OUT = 0.5A
1:1
2:1
3:1
4:1
33.5
39
44.5
50
0.34
0.57
0.73
0.84
16~22
28~35
37~45
44~52
3574f
相关PDF资料 |
PDF描述 |
|---|---|
| LT3575IFE#TRPBF | IC REG FLYBACK ISO ADJ 16TSSOP |
| LT3579EUFD-1#TRPBF | IC REG MULTI CONFIG SYNC 20QFN |
| LT3580MPMS8E#TRPBF | IC REG BOOST INV SEPIC 2A 8MSOP |
| LT3581IMSE#TRPBF | IC REG MULTI CONFIG ADJ 16MSOP |
| LT3582EUD-5#TRPBF | IC REG BOOST INV +/-5V DL 16QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3575 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic High Voltage Isolated Flyback Converter No External Start-Up Resistor |
| LT3575EFE#PBF | 功能描述:IC REG FLYBACK ISO ADJ 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT3575EFE#TRPBF | 功能描述:IC REG FLYBACK ISO ADJ 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3575EFEPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Up/Down 40V TSSOP16 |
| LT3575IFE#PBF | 功能描述:IC REG FLYBACK ISO ADJ 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
发布紧急采购，3分钟左右您将得到回复。