參數(shù)資料
型號(hào)： R1225N572J-TR
英文描述： SMPS Controller
中文描述： 開關(guān)電源控制器
文件頁(yè)數(shù)： 5/29頁(yè)
文件大小： 450K
代理商： R1225N572J-TR
12345
Rev. 1.11 - 5 -
I
TYPICAL APPLICATION AND APPLICATION HINTS
PM O S
C3
C2
L
C1
R1
SD
V
IN
CE
CE CONTROL
LOAD
V
OUT
EXT
GND
DLY
C4
PMOS: HAT1044M (Hitachi)
SD1 : RB063L-30 (Rohm)
C
1
: 10
μ
F (Ceramic Capacitor) C
2
: 0.1
μ
F (Ceramic Capacitor) C4: 20nF(Ceramic Capacitor)
R1
: 10
L: CR105-270MC (Sumida, 27
μ
H)
C3: 47
μ
F (Tantalum Type)
When you use these ICs, consider the following issues;
G
As shown in the block diagram, a parasitic diode is formed in each terminal, each of these diodes is
not formed for load current, therefore do not use it in such a way. When you control the CE pin by
another power supply, do not make its "H" level more than the voltage level of V
IN
pin.
G
The operation of Latch-type protection circuit is as follows;
When the maximum duty cycle continues longer than the delay time for protection circuit, (Refer to
the Electrical Characteristics) the protection circuit works to shutdown Power MOSFET with latching
operation. Therefore when an input/output voltage difference is small, the protection circuit may work
with small load current.
To release the protection of latch status, after disable this IC with a chip enable circuit, enable it
again, or restart this IC with power-on. However, in the case of restarting this IC with power-on, after
the power supply is turned off, if a certain amount of charge remains in C
IN,
or some voltage is forced
to V
IN
from C
IN,
this IC might not be restarted even after power-on.
G
Set external components as close as possible to the IC and minimize the connection between the
components and the IC. In particular, a capacitor should be connected to V
OUT
pin with the minimum
connection. Make grounding sufficient and reinforce supplying. Large switching current flows through
the connection of power line, an inductor and the connection of V
OUT.
If the impedance of the
connection of power supply is high, the voltage level of power supply of the IC fluctuates with the
switching current. This may cause unstable operation of the IC.
G
Use capacitors with a capacity of 22
μ
F or more for V
OUT
pin, and with good high frequency
characteristics such as tantalum capacitors. We recommend to use capacitors with an allowable
voltage which is at least twice as much as setting output voltage, in terms of the input capacitors, its
voltage rating is twice or more than input voltage. This is because there may be a case where a
spike-shaped high voltage is generated by an inductor when an external transistor is on and off.
G
Choose an inductor that has sufficiently small D.C. resistance and large allowable current and is
hard to reach magnetic saturation. If the value of inductance of an inductor is extremely small, the I
LX
may exceed the absolute maximum rating at the maximum loading.
Use an inductor with appropriate inductance.
G
Use a diode of a Schottky type with high switching speed, and also pay attention to its current
capacity.
G
Do not use this IC under the condition with V
IN
voltage at equal or less than minimum operating
相關(guān)PDF資料
PDF描述
R1225N572K-TR SMPS Controller
R1250V2.01A- Analog IC
R1250V2.01A-E2 Analog IC
R1250V2.11A- Analog IC
R1250V2.11A-E2 Analog IC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
R122BA19.38.62 功能描述:12 AWG 2C 19/25 BC .009" PVC RoHS:是 類別:線纜，導(dǎo)線 >> 多芯導(dǎo)線 系列:* 標(biāo)準(zhǔn)包裝:1 系列:*
R122BA19.40.62 功能描述:12 AWG 2C 19/25 BC .009" PVC RoHS:是 類別:線纜，導(dǎo)線 >> 多芯導(dǎo)線 系列:* 標(biāo)準(zhǔn)包裝:1 系列:*
R122BA19.41.01 功能描述:2C/12 19/.0185BC UNSH CL3R RoHS:是 類別:線纜，導(dǎo)線 >> 多芯導(dǎo)線 系列:* 標(biāo)準(zhǔn)包裝:1 系列:*
R122BA19.41.06 功能描述:12 AWG 2C 19/25 BC .009" PVC RoHS:是 類別:線纜，導(dǎo)線 >> 多芯導(dǎo)線 系列:* 標(biāo)準(zhǔn)包裝:1 系列:*
R122BA19.41.62 功能描述:2C/12 19/.0185BC UNSH CL3R RoHS:是 類別:線纜，導(dǎo)線 >> 多芯導(dǎo)線 系列:* 標(biāo)準(zhǔn)包裝:1 系列:*
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*