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CAT4201V-GT3 PDF预览

CAT4201V-GT3

更新时间： 2024-01-19 02:56:50
品牌 Logo 应用领域
安森美 - ONSEMI 驱动显示驱动器转换器驱动程序和接口
页数 文件大小 规格书
15页 255K
描述
LED 驱动器，350 mA，步降转换器

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中文翻译

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CAT4201V-GT3 技术参数

是否无铅：不含铅生命周期：Active
零件包装代码：TSOT包装说明：VSSOP, TSOP5/6,.11,37
针数：5Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
Factory Lead Time：9 weeks风险等级：1.01
Samacsys Confidence：3Samacsys Status：Released
Samacsys PartID：224590Samacsys Pin Count：5
Samacsys Part Category：Integrated CircuitSamacsys Package Category：SOT23 (5-Pin)
Samacsys Footprint Name：TSOT-23 5LEADSamacsys Released Date：2015-07-30 01:57:00
Is Samacsys：N接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：R-PDSO-G5JESD-609代码：e4
长度：2.9 mm湿度敏感等级：1
复用显示功能：NO功能数量：1
区段数：1端子数量：5
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：VSSOP
封装等效代码：TSOP5/6,.11,37封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：NOT SPECIFIED
电源：13 V认证状态：Not Qualified
座面最大高度：1 mm子类别：Display Drivers
最大供电电压：36 V最小供电电压：6.5 V
标称供电电压：13 V表面贴装：YES
温度等级：AUTOMOTIVE端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：GULL WING端子节距：0.95 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：1.6 mmBase Number Matches：1

CAT4201V-GT3 数据手册

 浏览型号CAT4201V-GT3的Datasheet PDF文件第6页浏览型号CAT4201V-GT3的Datasheet PDF文件第7页浏览型号CAT4201V-GT3的Datasheet PDF文件第8页浏览型号CAT4201V-GT3的Datasheet PDF文件第10页浏览型号CAT4201V-GT3的Datasheet PDF文件第11页浏览型号CAT4201V-GT3的Datasheet PDF文件第12页 
CAT4201  
APPLICATION INFORMATION  
L
(µH)  
I rated  
(A)  
LED current  
(A)  
Input Voltage Range  
Part Number  
The minimum supply voltage required to maintain  
adequate regulation is set by the cathode terminal  
voltage of the LED string (i.e the VBAT voltage minus  
the LED string voltage). When the LED cathode  
terminal falls below 3V, a loss of regulation occurs.  
CDRH6D26-100  
CDRH6D26-220  
CDRH6D28-330  
CDRH6D28-470  
CDRH6D28-560  
10  
22  
33  
47  
56  
1.5  
1.0  
0.35  
0.35  
0.35  
0.35  
0.35  
0.92  
0.8  
For applications which may occasionally need to  
experience supply “dropout” conditions, it is  
recommended that the CTRL input be used to sense  
the LED cathode voltage. The CTRL pin can either be  
tied directly to the cathode terminal (for Lamp  
Replacement) or connected via a pass-transistor for  
PWM lighting applications.  
0.73  
Table 3. Sumida inductors  
Capacitor Selection  
A 10μF ceramic capacitor C2 across the LED(s)  
keeps the LED ripple current within ± 15% of nominal  
for most applications. If needed, a larger capacitor can  
be used to further reduce the LED current ripple. Any  
resistance in series with the LED (0.5Ω or more)  
contributes to reduce the ripple current. The capacitor  
voltage rating should be equivalent to the maximum  
expected supply voltage so as to allow for “Open-  
LED” fault conditions. The capacitor value is  
independent of the switching frequency or the overall  
efficiency.  
Figure 2 shows the regulation performance obtained  
in dropout, when the CTRL pin is configured to sense  
the LED cathode voltage.  
400  
300  
300mA  
A 4.7μF ceramic input capacitor C1 is recommended  
to minimize the input current ripple generated on the  
supply. Using a larger capacitor value further reduces  
the ripple noise appearing on the supply rail.  
200  
150mA  
100  
If  
a
constant capacitance is needed across  
temperature and voltage, X5R or X7R dielectric  
capacitors are recommended.  
0
0
1
2
3
4
5
6
Schottky Diode  
CTRL VOLTAGE [V]  
The peak repetitive current rating of the Schottky  
diode must be greater than the peak current flowing  
through the inductor. Also the continuous current  
rating of the Schottky must be greater than the  
average LED current. The voltage rating of the diode  
should be greater than the peak supply voltage  
transient preventing any breakdown or leakage.  
Central Semiconductor Schottky diode CMDSH05-4  
(40V, 500mA rated) is recommended. Schottky diodes  
rated at 400mA (or higher) continuous current are fine  
for most applications.  
Figure 2. “Dropout” configured LED Current  
(as shown in Typical Application on page 1)  
Inductor Selection  
For 350mA LED current drive levels, a 22µH inductor  
value is recommended to provide suitable switching  
frequency across a wide range of input supply values.  
For LED current of 150mA or less, a 33µH or 47µH  
inductor is more suitable.  
The inductor must have a maximum current rating  
which equals or exceeds twice the programmed LED  
current. For example, when driving LEDs at 350mA,  
an inductor with at least 700mA current rating must be  
used. Minor improvements in efficiency can be  
achieved by selecting inductors with lower series  
resistance.  
Note: Schottky diodes with extremelly low forward voltages (VF) are  
not recommended, as they may cause an increase in the  
LED current.  
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
9
Doc. No. MD-5025 Rev. E  
1...6789101112...15

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