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参数资料
| 型号： | PKH4611API |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 6 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 7/20页 |
| 文件大小： | 1333K |
| 代理商： | PKH4611API |
15
EN/LZT 146 36 R1A (Replaces EN/LZT 137 29 R3) Ericsson Microelectronics AB, June 2000
Capacitive Load
The PKF series has no maximum limit for capacitive load on the
output. The power module may operate in current limiting mode
during start-up, affecting the ramp-up and the start-up time. For
optimum start performance we recommend maximum 100
mF/A of
IO. Connect capacitors at the point of load for best performance.
Current Limiting Protection (Ilim)
The output power is limited at loads above the output current limit-
ing threshold (Ilim), specified as a minimum value.
Input and Output Impedance
Both the source impedance of the power feeding and the load imped-
ance will interact with the impedance of the DC/DC power module.
It is most important to have the ratio between L and C as low as pos-
sible, i.e. a low characteristic impedance, both at the input and out-
put, as the power modules have a low energy storage capability.
Use an electrolytic capacitor across the input or output if the source
or load inductance is larger than 10
mH. Their equivalent series re-
sistance together with the capacitance acts as a lossless damping fil-
ter. Suitable capacitor values are in the range of 10–100
mF.
Tantalum capacitors are not recommended due to their low ESR-
value.
Parallel Operation
Paralleling of several converters is easily accomplished by direct con-
nection of the output voltage terminal pins. The load regulation
characteristic is specifically designed for optimal paralleling perform-
ance. Load sharing between converters will be within ±10%. It is rec-
ommended not to exceed PO = n × 0.9 × POmax, where POmax is the
maximum converter output power and n the number of paralleled
converters, in order to prevent overloading of any of the converters
and thereby decrease the reliability performance.
Operating Information
Remote Control (RC)
Turn-on or turn-off can be realized by using the optional RC-pin
– if an RC function is required, pin 6 shall be added by a certified
Ericsson VAR Center. Normal operation is achieved if pin 6 is open
(NC). If pin 6 is connected to pin 2 the power module turns off. To
ensure safe turn-off the voltage difference between pin 6 and 2 shall
be less than 1.0 V. RC is TTL open collector compatible output with
a sink capacity >100
mA (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 5 V output applica-
tions, but can easily be adjusted for other output voltages and the de-
sired OVP level.
Figure 2
Figure 1
Fuse Considerations
To prevent excessive current from flowing through the input supply
line, in the case of a short-circuit across the converter input, and ex-
ternal 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:
Refer to the fuse manufacturer for further information.
POmax
(
hmin × VImin)
Iinmax =
Packaging Information
Tubes
The PKH-series is delivered in tubes with a length of 384 mm
(15.12 in), for other dimensions see fig. 3.
Specification
Material:
ESD protected Polyvinylchloride (PVC)
Colour:
Transparent
Capacity:
10 pcs./tube
Weight:
Typ. 85 g
End stops:
Pins
Figure 3
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