PKB 4418 PIOANB - Typical Characteristics
Start-Up
Turn-Off
Turn-off at IO = 30 A resistive load at TPcb = +25 °C,
VI = 53 Vꢀ Turn-off enabled by disconnecting VIꢀ
Top trace: output voltage (0ꢀ5 V/divꢀ)ꢀ
Bottom trace: input voltage (50 V/div)ꢀ
Time scale: 0ꢀ2 ms/div.
Start-up at IO = 30 A resistive load at TPcb = +25 °C,
VI = 53 Vꢀ Start enabled by connecting VIꢀ
Top trace: output voltage (0ꢀ5 V/divꢀ)ꢀ
Bottom trace: input voltage (20 V/divꢀ)ꢀ
Time scale: 20 ms/divꢀ
Transient
Output Ripple
Output voltage ripple (20mV/divꢀ) at TPcb = +25 °C, VI = 53 V,
IO = 30 A resistive load with C = 10 µF tantalum and 0ꢀ1 µF
ceramic capacitorꢀ
Output voltage response to load current step-change
(7ꢀ5-22ꢀ5-7ꢀ5 A) at TPcb=+25 °C, Vin=53 Vꢀ
Top trace: output voltage (200 mV/divꢀ)ꢀ
Bottom trace: load step (15 A/divꢀ)
Band width = 20 MHzꢀ Time scale: 2 µs/divꢀ
Time scale: 0ꢀ1 ms/divꢀ
Output Voltage Adjust
Output Voltage Adjust
<L7>
The resistor value for an adjusted output voltage is calculated by
using the following equations:
5
ꢃꢀꢀꢀꢀꢀ
7
7
ꢇJODSFBTF
ꢇEFDSFBTF
0
0
4
ꢃꢀꢀꢀꢀ
Output Voltage Adjust Upwards, Increase:
Radj= 5ꢀ11((1ꢀ5(100+Δ%))/1ꢀ225Δ%-(100+2Δ%)/Δ%) kOhm
ꢃꢀꢀ3ꢀ
Output Voltage Adjust Downwards, Decrease:
ꢃꢀꢀ
2
Radj= 5ꢀ11(100/Δ%-2) kOhm
ꢃꢀ
1
Eg Increase 4% =>Vout = 1ꢀ56 Vdc
ꢃ
0
5ꢀ11(1ꢀ5(100+4)/1ꢀ225x4-(100+2x4)/4) = 25 kOhm
<ꢆ>
ꢄꢀ
ꢀ
ꢁ
ꢂ
ꢃꢄ
ꢃꢅ
Eg Decrease 2% =>Vout = 1ꢀ47 Vdc
5ꢀ11(100/2-2)= 245 kOhm
Output voltage adjust resistor value vsꢀ
percentage change in output voltageꢀ
EN/LZT 146 033 R9A ©Ericsson Power Modules, March 2007
12
PKB 4000 Datasheet
ERICSSON [ ERICSSON ]
