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| 型號(hào)： | PKF2610ASI/C |
| 廠商： | ERICSSON POWER MODULES AB |
| 元件分類(lèi)： | 電源模塊 |
| 英文描述： | 1-OUTPUT 6.6 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | 8 MM HEIGHT, POWER, MODULE, SMD-18 |
| 文件頁(yè)數(shù)： | 5/16頁(yè) |
| 文件大小： | 694K |
| 代理商： | PKF2610ASI/C |
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EN/LZT 146 31 R1B Ericsson Power Modules AB, March 2004
13
Operating Information
Over Voltage Protection (OVP)
The remote control can be utilized also for OVP by using the ex-
ternal circuitry in figure 2. Resistor values are for 5V output app-
lications, but can easily be adjusted for other output voltages and
the desired OVP level.
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 con-
nected to pin 18 the power module turns off. To ensure safe turn-
off the voltage difference between pin 11 and 18 shall be less than
1.0V. RC is an TTL open collector compatible output with a sink
capacity >300 mA (see fig. 1).
Figure 1
Figure 2
Rtn (pin 2)
- In (pin 18)
Out1(pin1)
RC (pin 11)
15k
1.2k
1k
TL431
10k
270
V , NOR (pin 8, 9)
adj
–In (pin 18)
Radj
Increase VO
NOR (pin 9)
V
(pin 8)
adj
Radj
Decrease VO
Figure 4
RC (pin 11)
- In (pin 18)
RIon
Increase VIon
RC (pin 11)
TOA (pin 10)
RIon
Decrease VIon
Figure 3
Fuse Considerations
To prevent excessive current from flowing through the input
supply line, in the case of a short-circuit across the converter in-
put, an external 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.
Output Voltage Adjust (Vadj)
Output voltage, VO, can be adjusted by using an external resistor.
Typical adjust range is ±15%. If pin 8 and 9 is not connected to-
gether the output will decrease to a low value. To increase VO a
resistor should be connected between pin 8/9 and 18, and to
decrease VO a resistor should be connected between pin 8 and 9
(see fig. 4).
Typical required resistor value to increase VO is given by:
Radj = k5 × (k6 – VO)/(VO – VOi) k
W
where VO is the desired output voltage,
VOi is the typical output voltage initial setting
and
k5= 4.2
k6= 6.27 V
PKF 2111A
k5= 4.2
k6= 15.0 V
PKF 2113A
k5= 3.18
k6= 3.90V
PKF 2610A
k5= 3.18
k6= 5.85V
PKF 2611
Typical required resistor value to decrease VO is given by:
Radj = k7 × (VOi – VO)/(VO – k8) k
W
where
k7= 18.0
k8= 2.76 V
PKF 2111A
k7= 18.6
k8= 6.50 V
PKF 2113A
k7= 17.2
k8= 1.70 V
PKF 2610A
k7= 12.5
k8= 4.28 V
PKF 2611
Turn-on/off Input Voltage
The power module monitors the input voltage and will turn on
and off at predetermined levels. The typical turn-on level (with-
out any external resistor) is 18.4 V and the typical turn-off level is
17.0 V, a slight deviation can occur due to tolerances in the
manufacturing process. These levels can be adjusted by means of
external resistors.
k1
k2
k3
k4
1020
18.3
22
16.9
PKF 2111A, PKF 2113A
1020
18.4
27
17.0
PKF 2610A
1020
18.4
25
17.0
PKF 2611
Turn-off level. VIoff is the adjusted turn-off level and is deter-
mined by the following equation: VIoff = VIon – 1.5V (typical
value).
To increase VIon a resistor should be connected between pin 11
and 18 (see fig. 3).
The resistance is given by the following equation
(For VIon>18.4V):
RIon = (k1 – VIon)/(VIon – k2) k
W
where k2 is the typical unadjusted turn-on input voltage (V).
To decrease VIon a resistor should be connected between pin 10
and 11 (see fig. 3). The resistance is given by the following
equation (for 17.0V < VIon >18.3V:
RIon = k3 × (VIon – k4)/(k2 – VIon) k
W
POmax
(
hmin × VImin)
Iinmax =
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