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参数资料
| 型号： | PKF4510PI |
| 厂商： | ERICSSON |
| 英文描述： | KPSE 12C 8#20 4#16 PIN |
| 中文描述： | 3？7瓦特DC / DC电源模块48 V输入系列 |
| 文件页数： | 19/24页 |
| 文件大小： | 1768K |
| 代理商： | PKF4510PI |
19
EN/LZT 146 33 R1A (Replaces EN/LZT 137 09 R7) Ericsson Microelectronics AB, June 2000
Operating Information
Remote Control (RC)
Turn-on or turn-off can be realized by using the RC-pin. Normal
operation is achieved if pin 11 is open (NC). If pin 11 is connected to
pin 17 the power module turns off. To ensure safe turn-off the voltage
difference between pin 11 and 17 shall be less than 1.0V. RC is TTL
open collector compatible output with a sink capacity >100 A (see
fig. 1).
Over Voltage Protection (OVP)
The remote control can be utilized also for OVP by using the exter-
nal circuitry in figure 2. Resistor values are for 5V output applica-
tions, but can easily be adjusted for other output voltages and the
desired OVP level.
Output Voltage Adjust (V
adj
)
Output voltage, V
O
, can be adjusted by using an external resistor.
Typical adjust range is ±15%. If pins 8 and 9 are not connected to-
gether the output will decrease to a low value. To increase V
O
a resis-
tor should be connected between pin 8/9 and 18, and to decrease V
O
a
resistor should be connected between pin 8 and 9 (see fig. 4).
Turn-on/off Input Voltage
The power module monitors the input voltage and will turn on and
turn off at predetermined levels set by means of external resistors.
To increase V
Ion
a resistor should be connected between pin 11 and
17 (see fig. 3).
Fuse Considerations
To prevent excessive current from flowing through the input supply
line, in the case of a short-circuit across the converter input, an exter-
nal fuse should be installed in the non-earthed input supply line. We
recommend using a fuse rated at approximately 2 to 4 times the value
calculated in the formula below:
P
Omax
(
min
× V
Imin
)
Refer to the fuse manufacturer for further information.
I
inmax
=
Figure 3
RC (pin 11)
In (pin 17)
R
Ion
Increase V
Ion
RC (pin 11)
TOA (pin 10)
R
Ion
Decrease V
Ion
Rtn (pin 2)
In (pin 17)
Out 1 (pin 1)
RC (pin 11)
15k
1.2k
1k
TL431
10k
270
Figure 2
Figure 1
The resistance is given by the following equation
(For V
Ion
>37V):
R
Ion
= 100× (100.2 – V
Ion
)/(V
Ion
– 36.5) k
where 36.5 is the typical unadjusted turn-on input voltage (V).
V
Ioff
is the adjusted turn-off input voltage and is determined by
V
Ion
–V
Ioff
= 2V (typical value).
To decrease V
Ion
a resistor should be connected between pin 10 and
11 (see fig. 3). The resistance is given by the following equation (for
30V < V
Ion
> 36V:
R
Ion
= 364 × (V
Ion
– 29.9)/(36.5 – V
Ion
) k
and
k
1
=0.684
k
1
=0.495
k
1
=0.495
k
1
=0.566
k
1
=0.495
k
1
=0.495
k
1
=0.495
k
1
=0.566
k
2
= 2.46V
k
2
= 3.93V
k
2
= 5.87V
k
2
=15.00V
k
2
= 5.87V
k
2
= 3.93V
k
2
= 5.87V
k
2
=15.00V
PKF 4310
PKF 4510
PKF 4611
PKF 4621
*)
PKF 4622
PKF 4628
PKF 4629
PKF 4713
*)
Typical required resistor value to
decrease V
O
is given by:
R
adj
= k
1
× (V
Oi
– V
O
)/(V
O
– k
2
) k
where k
1
=2.751
k
1
=1.986
k
1
=1.986
k
1
=2.284
k
1
=1.986
k
1
=1.986
k
1
=1.986
k
1
=2.284
k
2
=1.75V
k
2
=2.59V
k
2
=4.12V
k
2
=9.52V
k
2
=4.12V
k
2
=2.59V
k
2
=4.12V
k
2
=9.52V
PKF 4310
PKF 4510
PKF 4611
PKF 4621
PKF 4622
PKF 4628
PKF 4629
PKF 4713
*)
Over 13.8V output voltage, the input voltage range is
limited to 38...65V.
Typical required resistor value to
increase V
O
is given by:
R
adj
= k
1
× (k
2
– V
O
)/(V
O
– V
Oi
) k
where
V
O
is the desired output voltage,
V
Oi
is the typical output voltage initial setting
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