Ericsson Internal
PRODUCT SPECIFICATION
4 (5)
Prepared (also subject responsible if other)
No.
MICGORP
2/1301-BMR 602 4318/2
Approved
Checked
Date
Rev
Reference
MPM/BK (Natalie Johansson)
(MICRF)
2007-05-10
D
1.5 V/25 A Typical Characteristics
PKU 4318H
Start-up
Shut-down
Start-up enabled by connecting V
I at:
Tref = +25°C, VI = 53 V,
IO = 25 A resistive load.
Top trace: output voltage ( 0.5 V/div.).
Bottom trace: input voltage ( 20 V/div.).
Time scale: ( 5 ms/div.).
Shut-down enabled by disconnecting V
I at:
Tref = +25°C, VI = 53 V,
IO = 25 A resistive load.
Top trace: output voltage ( 0.5 V/div.).
Bottom trace: input voltage ( 50 V/div.).
Time scale: ( 0.2 ms/div.).
Output Ripple & Noise
Output Load Transient Response
Output voltage ripple at:
Tref = +25°C, VI = 53 V,
IO = 25 A resistive load.
Trace: output voltage ( 20 mV/div.).
Time scale: ( 2 μs/div.).
Output voltage response to load current step-
change (6.25 - 18.75 - 6.25 A) at:
Tref =+25°C, VI = 53 V.
Top trace: output voltage ( 200 mV/div.).
Bottom trace: load current ( 10 A/div.).
Time scale: ( 0.1 ms/div.).
Output Voltage Adjust (see operating information)
Passive adjust
The resistor value for an adjusted output voltage is calculated by
using the following equations:
Output Voltage Adjust Upwards, Increase:
(
)
Δ
Δ
×
Δ
+
×
=
22
.
10
%
511
%
225
.
1
%
100
50
.
1
11
.
5
Radj
kΩ
Example: Increase 4% =>Vout = 1.56 Vdc
(
)
×
+
×
22
.
10
4
511
4
225
.
1
4
100
50
.
1
11
.
5
kΩ = 24.7 kΩ
Output Voltage Adjust Downwards, Decrease:
22
.
10
%
511
Δ
=
Radj
kΩ
Example: Decrease 2% =>Vout = 1.47 Vdc
22
.
10
2
511
kΩ = 245 kΩ
Active adjust
The output voltage may be adjusted using a voltage applied to the
Vadj pin. This voltage is calculated by using the following equation:
×
+
=
50
.
1
50
.
1
45
.
2
225
.
1
Vdesired
Vadj
V
Example: Upwards => 1.60 V
×
+
50
.
1
50
.
1
60
.
1
45
.
2
225
.
1
V = 1.39 V
Example: Downwards => 1.0 V
×
+
50
.
1
50
.
1
00
.
1
45
.
2
225
.
1
V = 0.41 V
E
PKU 4000 PI & SI series
DC/DC converters, Input 36-75 V, Output 25 A/50 W
EN/LZT 146 308 R2B May 2007
Ericsson Power Modules AB
Technical Specication
E
PKU 4000 PI & SI series
DC/DC converters, Input 36-75 V, Output 25 A/50 W
EN/LZT 146 308 R3A May 2007
Ericsson Power Modules AB
Technical Specication
10