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XC9105D092MR 参数 Datasheet PDF下载

XC9105D092MR图片预览
型号: XC9105D092MR
PDF下载: 下载PDF文件 查看货源
内容描述: 陶瓷电容器兼容,升压型DC / DC控制器 [Ceramic Capacitor Compatible, Step-up DC/DC Controllers]
分类和应用: 电容器陶瓷电容器控制器
文件页数/大小: 23 页 / 1622 K
品牌: TOREX [ Torex Semiconductor ]
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XC9103/XC9104/XC9105 Series  
OPERATIONAL EXPLANATION (Continued)  
< Output Voltage Setting>  
Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based  
on the values of RFB1 and RFB2. The sum of RFB1 and RFB2 should normally be 2 MΩor less.  
VOUT = 0.9 x (RFB1 + RFB2) / RFB2  
The value of CFB1, speed-up capacitor for phase compensation, should result in fzfb = 1/(2π×CFB×RFB1) equal to 5 to  
30kHz. Adjustments are required depending on the application, value of inductance (L), and value of load capacity (CL).  
fzfb = 30kHz (L=10μH)  
fzfb = 20kHz (L=22μH)  
fzfb = 10kHz (L=47μH)  
[ Example of Equation ]  
RFB1 : 120kΩ  
RFB2 : 45kΩ  
CFB  
: 47pF  
68pF  
(fzfb = 30kHz, L = 10μH)  
(fzfb = 20kHz, L = 22μH)  
130pF (fzfb = 10kHz, L = 47μH)  
< The use of ceramic capacitor CL >  
The circuit of the XC9103/04/05 series is organized by a specialized circuit, which reenacts negative feedback of both  
voltage and current. Also by insertion of approximately 100mΩ of a low and inexpensive sense resistor as current sense,  
a high degree of stability is possible even using a ceramic capacitor, a condition which used to be difficult to achieve.  
Compared to a tantalum condenser, because the series can be operated in a very small capacity, it is suited to use of the  
ceramic capacitor, which is cheap and small.  
< External Components >  
:
Tr  
*When a MOSFET is used:  
*When a NPN Tr. Is used:  
XP161A1355PR (N-ch Power MOSFET, TOREX)  
Note*: As the breakdown voltage of XP161A1355 is 8V, take care  
with the power supply voltage.  
2SD1628 (SANYO)  
RB : 500Ω(Adjust with Tr's HSE or load)  
With output voltages over 6V, use the XP161A1265 with a  
breakdown voltage of 12V.  
VST1: XP161A1355PR =1.2V (MAX.)  
: 2200pF (Ceramic type set so that RB and  
pole is less than 70% of FOSC)  
CB<1 / (2πx RB x FOSC x 0.7)  
CB  
XP161A1265PR = 1.5V (MAX.)  
:
SD  
L, CL  
L
MA2Q737 (Schottky type, MATSUSHITA)  
:
When Using Ceramic Type  
:
22μH (CDRH5D28, SUMIDA, FOSC = 100, 180kHz)  
10μH (CDRH5D18, SUMIDA, FOSC = 300, 500kHz)  
:
CL  
10V 10μF (Ceramic Type, LMK325BJ106ML, TAIYO YUDEN)  
Use the formula below when step-up ratio and output current is  
large.  
CL = (CL standard value) x (IOUT(mA) / 300mA x VOUT / VIN)  
100mΩ (FOSC = 180, 300, 500kHz)  
:
RSENSE  
50mΩ (FOSC = 100kHz)  
:
CL  
Tantalum Type  
:
L
22μH (CDRH5D28, SUMIDA, FOSC = 300kHz)  
47μH (CDRH5D28, SUMIDA, FOSC = 100, 180kHz)  
Except when IOUT(mA) / 100mA x VOUT / VIN > 2 22μH  
10μH (CDRH5D18, SUMIDA, FOSC = 500kHz)  
:
CL  
16V, 47μF (Tantalum Type 16MCE476MD2, NICHICHEMI)  
Use the formula below when step-up ratio and output current is  
large.  
CL = (CL standard value) x (IOUT(mA) / 300mA x VOUT / VIN)  
Not required, but short out the wire.  
:
RSENSE  
:
CL  
AL Electrolytic Type  
:
L
22μH (CDRH5D28 SUMIDA, FOSC = 300kHz)  
47μH (CDRH5D28 SUMIDA, FOSC = 100, 180kHz)  
Except when IOUT(mA) / 100mA x VOUT / VIN > 2 22μH  
:
CL  
16V, 100μF (AL Electrolytic Type) + 10V, 2.2μF (Ceramic Type)  
Strengthen appropriately when step-up ratio and output current is  
large.  
:
:
RSENSE  
CFB  
Not required, but short out the wire.  
Set up so that fzfb = 100kHz.  
8/23  
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