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LT3804EFE PDF预览

LT3804EFE

更新时间： 2024-09-22 23:13:39
品牌 Logo 应用领域
凌特 - Linear 光电开关光电二极管驱动控制器
页数 文件大小 规格书
16页 257K
描述
Secondary Side Dual Output Controller with Opto Driver

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中文翻译

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LT3804EFE 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：TSSOP包装说明：TSSOP,
针数：28Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.2模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：VOLTAGE-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：25 V最小输入电压：8 V
标称输入电压：11 VJESD-30 代码：R-PDSO-G28
JESD-609代码：e0长度：9.7 mm
湿度敏感等级：1功能数量：1
端子数量：28最高工作温度：70 °C
最低工作温度：最大输出电流：1 A
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：235认证状态：Not Qualified
座面最大高度：1.2 mm表面贴装：YES
切换器配置：PUSH-PULL最大切换频率：570 kHz
温度等级：COMMERCIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：20
宽度：4.4 mmBase Number Matches：1

LT3804EFE 数据手册

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Final Electrical Specifications  
LT3804  
Secondary Side Dual  
Output Controller with Opto Driver  
U
June 2003  
DESCRIPTIO  
FEATURES  
The LT®3804 is a high efficiency step-down switching  
regulatorwithoptocouplerfeedbackcontrolforregulating  
multiple outputs in single-secondary winding isolated  
power supplies.  
■
Regulates Two Secondary Outputs  
Optocoupler Feedback Driver and Second Output  
Synchronous Driver Controller  
■
■
■
■
■
■
■
True Differential Remote Sensing Regulation  
High Switching Frequency: up to 800kHz  
Programmable Current Limit  
Programmable Soft-Start and Power Good  
Automatic Frequency Synchronization  
Available in Thermally Enhanced 28-Lead TSSOP  
TheLT3804contains anerroramplifierand anoptocoupler  
driver to regulate the first (main) output. For the second  
output regulation, the LT3804 contains a complete PWM  
controller todrivedualsynchronousN-channelMOSFETs.  
With leading edge modulation, it operates with either  
current or voltage mode control of the primary side. The  
LT3804 is synchronized to the falling edge of the trans-  
former secondary winding and can be used in single-  
ended or double-ended isolated power converter topolo-  
gies. A user selectable discontinuous conduction mode  
improves light load efficiency.  
U
APPLICATIO S  
■
48V Input Isolated DC/DC Converters  
■
Multiple Output Power Supplies  
■
Offline Converters  
DC/DC Power Modules  
■
True differential Kelvin sensing is used for each output  
feedback amplifier to achieve high regulation accuracy  
and design simplicity. Other features include soft start,  
current limit and power good flags.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
V
OUT1  
3.3V  
V
IN  
+
–
L1  
1.8µH  
V
V
AT 15A  
OS1  
36V  
0.003Ω  
+
+
V
CC  
BIAS  
TO 72V  
C
OUT1  
LT3804  
OS1  
SYNC  
CL1N  
•
•
L2  
1.8µH  
Q1  
OUT2  
TGATE  
SW  
Q4  
CL1P  
V
1.8V  
AT 15A  
OUT2  
0.003Ω  
LTC1693-1  
V
CC  
OUT1  
IN1  
C
OUT2  
Q3  
x2  
Q2  
x2  
BGATE  
PGND  
CSET  
IN2  
390pF  
–
+
V
V
GNDS1  
OS1  
CL2P  
CL2N  
•
•
•
•
TG  
BG  
604Ω  
V
AOUT2  
OS1  
V
V
FB1  
LT3781  
2.74k  
3.01k  
SG  
V
FB2  
V
V
1.5k  
REF  
AOUT1  
+
–
V
C
FB  
GNDS2  
OPTO  
3804 F01  
C
, C : SANYO POSCAP 4TPE680MF 680µF/4V  
OUT1 OUT2  
ISOLATION  
BOUNDARY  
L1, L2: SUMIDA CEP125-IR8MC-H  
Q1-Q4: SILICONIX Si7892DP  
Figure 1. 250kHz, 3.3V and 1.8V Output Isolated DC/DC Converter (Simplified Schematic)  
3804i  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
1
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中文翻译

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