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參數(shù)資料
| 型號(hào)： | M51996AP |
| 廠商： | Mitsubishi Electric Corporation |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開(kāi)關(guān)穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 15/22頁(yè) |
| 文件大?。?/td> | 366K |
| 代理商： | M51996AP |
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SWITCHING REGULATOR CONTROL
M51996AP/FP
MITSUBISHI (Dig./Ana. INTERFACE)
( 15
current characteristics of type M51996AP/FP.
The input voltage(V
IN(STOP)
),at which the IC operation stops,is
decided by the ratio of third winding of transformer.
The V
IN(START)
and V
IN(STOP)
are given by following equations.
M51996A
GND
Vcc
Fig.19 How to design the conductor-pattern of type
M51996A on PC board(schematic example)
COLLECTOR
EMITTER
CVcc
It is required that the V
IN(START)
must be higher than V
IN(STOP)
.
When the third winding is the "fly back winding" or "reverse
polarity",the V
IN(START)
can be fixed,however,V
IN(STOP)
can not
be settled by this system,so the auxiliary circuit is required.
To avoid the abnormal IC operation,it is recommended to
design the Vcc is not vary abruptly and has few spike
voltage,which is induced from the stray capacity between the
winding of main transformer.
To reduce the spike voltage,the Cvcc,which is connected
between Vcc and ground,must have the good high frequency
characteristics.
To design the conductor-pattern on PC board,following cautions
must be considered as shown in Fig.19.
(a)To separate the emitter line of type M51996A from the GND
line of the IC
(b)The locate the C
VCC
as near as possible to type M51996A
and connect directly
(c)To separate the collector line of type M51996A from the Vcc
line of the IC
(d)To connect the ground terminals of peripheral parts of ICs to
GND of type M51996A as short as possible
(3)Notice to the Vcc,Vcc line and GND line
V
IN(START)
R1 I
CCL
+ (R1
(START)
~
R2
...............(7)
V
IN(STOP)
~
(STOP)-
V
F)
............(8)
N
B
N
P
+2
1
V'
IN RIP(P-P)
where
I
CCL
is the operation start-up current of IC
Vcc
(START)
is the operation start-up voltage of IC
Vcc
(STOP)
is the operation stop voltage of IC
V
F
is the forward voltage of rectifier diode
V'
IN(P-P)
is the peak to peak ripple voltage of
N
B
V'
IN RIP(P-P)
Vcc terminal ~
N
P
OUTPUT
R
CLM
MAIN
TRANSFORMER
THIRD
WINDING
(4)Power supply circuit for easy start-up
When IC start to operate,the voltage of the C
VCC
begins to
decrease till the C
VCC
becomes to be charged from the third
winding of main-transformer as the Icc of the IC increases
abruptly.In case shown in Fig.17 and 18,some "unstable start-
up" or "fall to start-up" may happen, as the charging interval of
C
VCC
is very short duration;that is the charging does occur only
the duration while the induced winding voltage is higher than
the C
VCC
voltage,if the induced winding voltage is nearly equal
to the "operation-stop voltage" of type M51996A.
It is recommended to use the 10 to 47μF for C
VCC1
,and about 5
times capacity bigger than C
VCC1
for C
VCC2
.
M51996A
CVcc1
MAIN
TRANSFORMER
THIRD
WINDING
CVcc2
GND
Vcc
R1
Fig.20 DC source circuit for stable start-up
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M51996FP | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| M51997 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| M51997FP | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| M51997P | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| M52001SP | SYNC SIGNAL PROCESSOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M51996AP(#TF0J) | 制造商:Renesas Electronics Corporation 功能描述: |
| M51996FP | 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:M51996P |
| M51996P | 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:M51996P |
| M51997 | 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SWITCHING REGULATOR CONTROL |
| M51997FP | 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SWITCHING REGULATOR CONTROL |
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