PKB 4318 PIOBNB - Typical Characteristics
Start-Up
Turn-Off
Start-up at I
O
= 30 A resistive load at T
Pcb
= +25 °C,
V
I
= 53 V . Start enabled by connecting V
I
.
Top trace: output voltage (0 .5 V/div .) .
Bottom trace: input voltage (20 V/div .) .
Time scale: 50 ms/div .
Turn-off at I
O
= 30 A resistive load at T
Pcb
= +25 °C,
V
I
= 53 V . Turn-off enabled by disconnecting V
I
.
Top trace: output voltage (0 .5 V/div .) .
Bottom trace: input voltage (50 V/div) .
Time scale: 0 .2 ms/div .
Output Ripple
Transient
Output voltage ripple (20mV/div .) at T
Pcb
= +25 °C, V
I
= 53 V,
I
O
= 30 A resistive load with C = 10 µF tantalum and 0 .1 µF
ceramic capacitor .
Band width = 20 MHz . Time scale: 2 µs/div .
Output voltage response to load current step-change
(7 .5-22 .5-7 .5 A) at T
Pcb
=+25 °C, Vin=53 V .
Top trace: output voltage (200mV/div .) .
Bottom trace: load step (10 A/div .)
Time scale: 0 .1 ms/div .
Output Voltage Adjust
The resistor value for an adjusted output voltage is calculated by
using the following equations:
Output Voltage Adjust Upwards, Increase:
R
adj
= 5 .11((1 .2(100+Δ%))/ 0 .6Δ%-(100+2Δ%)/Δ%) kOhm
Output Voltage Adjust Downwards, Decrease:
R
adj
= 5 .11(100 /
Δ%-2)
kOhm
Output Voltage Adjust
5
4
3
2
1
Eg Increase 4% =>V
out
= 1 .248 V
dc
5 .11(1 .2(100+4)/0 .6x4-(100+2x4)/4) = 128 kOhm
Eg Decrease 2% =>V
out
= 1 .176 V
dc
5 .11(100/2-2)= 245 kOhm
Output voltage adjust resistor value vs .
percentage change in output voltage .
0
PKB 4000 Datasheet
9
EN/LZT 146 033 R9A © Ericsson Power Modules, March 2007
ERICSSON [ ERICSSON ]
