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LTC3900HS8

更新时间： 2024-11-05 15:38:11
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
20页 268K
描述
IC SWITCHING REGULATOR, PDSO8, PLASTIC, SOP-8, Switching Regulator or Controller

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中文翻译

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LTC3900HS8 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：SOIC包装说明：PLASTIC, SOP-8
针数：8Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.11模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE最大输入电压：11 V
最小输入电压：4.5 V标称输入电压：5 V
JESD-30 代码：R-PDSO-G8JESD-609代码：e0
长度：4.9025 mm功能数量：1
端子数量：8最高工作温度：150 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOP8,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
认证状态：Not Qualified座面最大高度：1.752 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK技术：CMOS
温度等级：AUTOMOTIVE端子面层：Tin/Lead (Sn/Pb)
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL宽度：3.899 mm
Base Number Matches：1

LTC3900HS8 数据手册

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LTC3900  
Synchronous Rectifier Driver  
for Forward Converters  
FeaTures  
DescripTion  
The LTC®3900 is a secondary-side synchronous recti-  
fier driver designed to be used in isolated forward con-  
verter power supplies. The chip drives N-channel rectifier  
MOSFETs and accepts pulse sychronization from the  
primary-side controller via a pulse transformer.  
n
N-Channel Synchronous Rectifier MOSFET Driver  
n
Programmable Timeout Protection  
n
Reverse Inductor Current Protection  
n
Pulse Transformer Synchronization  
n
Wide V Supply Range: 4.5V to 11V  
CC  
n
n
n
15ns Rise/Fall Times at V = 5V, C = 4700pF  
CC  
L
TheLTC3900incorporatesafullrangeofprotectionforthe  
external MOSFETs. A programmable timeout function is  
included that disables both drivers when the synchroniza-  
tion signal is missing or incorrect. Additionally, the chip  
sensestheoutputinductorcurrentthroughthedrain-source  
resistance of the catch MOSFET, shutting off the MOSFET  
if the inductor current reverses. The LTC3900 also shuts  
off the drivers if the supply voltage is too low.  
Undervoltage Lockout  
Small SO-8 Package  
applicaTions  
n
48V Input Isolated DC/DC Converters  
Isolated Telecom Power Supplies  
High Voltage Distributed Power  
Step-Down Converters  
Industrial Control System Power Supplies  
Automotive and Heavy Equipment  
n
n
L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks  
of Linear Technology Corporation. All other trademarks are the property of their respective  
owners.  
n
n
Typical applicaTion  
ISOLATION  
BARRIER  
L0  
Z
V
3.3V  
40A  
OUT  
V
IN  
36V TO 72V  
+
D3  
C
OUT  
Q
Efficiency  
T1  
C
R
Z
95  
90  
85  
80  
75  
70  
65  
GATE  
OUT  
V
V
= 3.3V  
OUT  
REG  
R
Q1  
CS2  
R
B
R
CS1  
D
= 36V  
Z
IN  
Q3  
+
CS  
V
= 72V  
IN  
OC  
CG  
Q4  
470Ω  
V
IN  
= 48V  
V
CC  
I
SENSE  
–
CS  
R
TMR  
R
CS3  
LTC3900  
10mΩ  
LT1952  
C
TIMER  
VCC  
FG  
C
SG  
C
TMR  
S
OUT  
SYNC  
GND  
COMP  
GND  
T2  
R
SG  
SYNC  
270Ω  
25 30  
LOAD CURRENT (A)  
0
5
10 15 20  
35 40  
R1  
OPTO  
V
IN  
3900 F10b  
LT4430  
COMP  
GND  
OC  
OCI  
FB  
R2  
3900 F01  
Figure 1. Simplified Isolated Synchronous Forward Converter  
3900fb  
1
1234567...20

中文翻译

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