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参数资料
| 型号： | PKF4918CSI |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 9 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | 0.315 INCH HEIGHT, SMD-18 |
| 文件页数： | 7/8页 |
| 文件大小： | 222K |
| 代理商： | PKF4918CSI |
7
EN/LZT 146 024 R1A Ericsson Power Modules AB, March 2003
Operating Information
Remote Control (RC)
Turn-on or turn-off can be realized by using the RC-pin. If pin 11 is
connected to pin 17 the power module turns off. Normal operation
is achieved if pin 11 is open (NC). To ensure safe turn-off the voltage
difference between pin 11 and 17 shall be less than 1.0V. The pin is
to be connected to an open collector output with a sink capacity
of >300 A (see g. 1).
Parallel Operation
Contact Ericsson for more information.
Information given in this data sheet is believed to be accurate and reliable. No
responsibility is assumed for the consequences of its use nor for any infringement
of patents or other rights of third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights of
Ericsson Power Modules. These products are sold only according to Ericsson
Power Modules’ general conditions of sale, unless otherwise confirmed in writing.
Specifications subject to change without notice.
Figure 1
PKF
The resistance is given by the following equation
(For VIon>34.5V):
RIon = (2655 – VIon)/(VIon – 34.5) k
VIoff is the adjusted turn-off input voltage and is determined by
VIon –VIoff = 2 V (typical value).
To decrease VIon a resistor should be connected between pin 10 and
11 (see g. 2). The resistance is given by the following equation (for
30.5V < VIon > 34.5V):
RIon = 45 × (VIon – 30.5) /(34.5 – VIon) k
Turn-on/off Input Voltage
The power module monitors the input voltage and will turn on and
turn off at predetermined levels. These levels can be adjusted by
means of external resistors.
To increase VIon a resistor should be connected between pin 11 and 17
(see g.2).
Figure 2
Output Voltage Adjust (Vadj)
Output voltage, VO, can be adjusted by using an external resistor or
other external circuitry. If other circuitry is used, the slew rate has
to be limited to maximum 5 V/ms. If pins 8 and 9 are not connected
together the output will decrease to a low value. To increase VO a
resistor should be connected between pin 8/9 and 17, and to decrease
VO a resistor should be connected between pin 8 and 9 (see g. 4).
Figure 3
Typical required resistor value to increase VO is given by:
Radj = 5 × (2.25 – VO)/(VO – VOi) k
where
VO is the desired output voltage,
VOi is the typical output voltage initial setting
Typical required resistor value to decrease VO is given by:
Radj = 19 × (VOi – VO)/(VO – 1.477) k
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