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AN8819NFB PDF预览

AN8819NFB

更新时间: 2024-01-30 21:56:17
品牌 Logo 应用领域
松下 - PANASONIC 驱动器转换器
页数 文件大小 规格书
11页 117K
描述
4Ch. Linear Driver IC DC-DC Converter Control for CD

AN8819NFB 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:QFP包装说明:QFP, QFP44,.47SQ,32
针数:44Reach Compliance Code:unknown
HTS代码:8542.39.00.01风险等级:5.92
模拟集成电路 - 其他类型:ANALOG CIRCUITJESD-30 代码:S-PQFP-G44
JESD-609代码:e0长度:10 mm
功能数量:1端子数量:44
最高工作温度:70 °C最低工作温度:-25 °C
封装主体材料:PLASTIC/EPOXY封装代码:QFP
封装等效代码:QFP44,.47SQ,32封装形状:SQUARE
封装形式:FLATPACK峰值回流温度(摄氏度):NOT SPECIFIED
电源:1.5/9,3/5 V认证状态:Not Qualified
座面最大高度:2.5 mm子类别:Motion Control Electronics
最大供电电压 (Vsup):14 V最小供电电压 (Vsup):1.5 V
表面贴装:YES技术:BIPOLAR
温度等级:OTHER端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING端子节距:0.8 mm
端子位置:QUAD处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:10 mm

AN8819NFB 数据手册

 浏览型号AN8819NFB的Datasheet PDF文件第5页浏览型号AN8819NFB的Datasheet PDF文件第6页浏览型号AN8819NFB的Datasheet PDF文件第7页浏览型号AN8819NFB的Datasheet PDF文件第8页浏览型号AN8819NFB的Datasheet PDF文件第9页浏览型号AN8819NFB的Datasheet PDF文件第10页 
ICs for CD/CD-ROM Player  
AN8819NFB  
• DC-DC Converter Portion  
3.4V regulator can be constructed by using external components. The output voltage can be made variable by using an external  
resistance.  
The short-circuit protective function stops switching of OUT pin (Pin3), unless the output of error amplifier (Pin4) reaches L  
after H, within t = CSPRO × VTH/ISPRO (VTH = 1.1V ISPRO = 30µA). (It is recommended that an electrolytic capacitor of 4.7µF  
around should be used for Pin3.)  
The soft start function works by attaching a capacitor to Pin2 for GND. t = CDED × R (R = 60k)  
Also, MAX duty can be changed by attaching an external resistance to Pin2. The output voltage is determined as follows:  
(Example)  
Assuming R1 + R2 = 50kΩ  
SVCC  
1.11V  
11  
R1 × R3  
R1 + R3  
R2 × R4  
R2 + R4  
+
R1  
R2  
R3  
R4  
IC Inside  
+
SVCC = 1.1 ×  
R2 × R4  
R2 + R4  
5
IN  
Where  
R3 = 26.9kΩ  
R4 = 13.1kΩ  
4
FB  
• Ripple Filter Portion for DA Converter (Ripple Filter of Low Saturation Voltage Type)  
Attach a capacitor for noise removal to CRIP pin for GND.  
(A capacitor of 22µF around is recommended.) Output current : 10mA (typ.)  
• Battery Voltage Detection Circuit  
The voltage applied to VSEN pin (Pin10) and the constant voltage are compared for output to EMP pin (Pin37).  
There is approx. 50mV of hysteresis from detection to reset to prevent the output chattering.  
The detection threshold voltage can be made variable by an external resistance.  
The threshold values with no external resistances at VSEN pin (Pin10) are as follows:  
Detection : VSEN = 2.2V (typ.) BSEL (Pin9) = L  
Reset : VSEN = 2.25V (typ.) BSEL (Pin9) = L  
Detection : VSEN = 1.8V (typ.) BSEL (Pin9) = HiZ  
Reset : VSEN = 1.85V (typ.) BSEL (Pin9) = HiZ  
Use the following equation as reference to determine the detection threshold voltage:  
R1  
Assuming that the voltage of VSEN (Pin10) at battery  
VSEN  
VSEN  
shortage detection is VSEN  
10  
R1 + R2 + R3  
VSEN’ =  
× 1.25  
R3  
R2  
R3  
+
Where  
R1 : External Resistance  
R2 : 8.0kΩ  
R3 : 16.5k(BSEL = HiZ)  
R3 : 10.5k(BSEL = L)  
1.25V  
IC Inside  
37  
EMP  
• RESET and MRST Portions  
RESET (Pin35) is changed from L to H, and MRST pin is changed from H to L, with approx. 90% of the output voltage by a DC-  
DC converter.  

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