Ericsson Internal
ECHWANG
PRODUCT SPECIFICATION
4 (5)
Prepared (also subject responsible if other)
No.
2/1301-BMR 636 01/14 Uen
22
Technical Specification
Approved
Checked
Date
Rev
Reference
EN/LZT 146 394 R5D October 2013
PKB 4000 series
DC/DC converters, Input 36-75 V, Output 30 A/90 W
SEC/D (Betty Wu)
ESECZHW
2009-2-9
C
© Ericsson AB
3.3 V/20 A Typical Characteristics
PKB 4610 PINB
Start-up
Shut-down
Start-up enabled by connecting VI at:
Top trace: output voltage (2 V/div.).
Bottom trace: input voltage (50 V/div.).
Time scale: (10 ms/div.).
Shut-down enabled by disconnecting VI at:
P1 = +25°C, VI = 53 V,
IO = 20 A resistive load.
Top trace: output voltage (2 V/div.).
Bottom trace: input voltage (50 V/div.).
Time scale: (0.1 ms/div.).
TP1 = +25°C, VI = 53 V,
T
IO = 20 A resistive load.
Output Ripple & Noise
Output Load Transient Response
Output voltage ripple at:
Trace: output voltage (20 mV/div.).
Time scale: (2 μs/div.).
Output voltage response to load current step- Top trace: output voltage (200 mV/div.).
T
P1 = +25°C, VI = 53 V,
O = 20 A resistive load.
change (5-15-5 A) at:
TP1 =+25°C, VI = 53 V.
Bottom trace: load current (10 A/div.).
Time scale: (0.1 ms/div.).
I
Output Voltage Adjust (see operating information)
Passive adjust
Active adjust
The output voltage may be adjusted using a {current/voltage} applied to the
Vadj pin. This {current/voltage} is calculated by using the following equations:
The resistor value for an adjusted output voltage is calculated by
using the following equations:
Vdesired −3.3
V
⎛
⎝
⎞
⎟
Output Voltage Adjust Upwards, Increase:
V
adj = 1.225 + 2.45×
⎜
kΩ
3.3
(
5.11×3.30 100 + Δ%
)
511
⎠
⎛
⎞
Radj =
−
−10.22
⎜
⎟
1.225×Δ%
Δ%
⎝
⎠
Example: Upwards => 3.40 V
V = 1.2992 V
3.40 − 3.30
⎛
⎝
⎞
⎠
Example: Increase 4% =>Vout = 3.432 Vdc
1.225 + 2.45×
⎜
⎟
⎛ 5.11× 3.30
(100 + 4
)
511
4
⎞
3.3
kΩ = 220 kΩ
⎜
⎜
−
− 10.22⎟
⎟
1.225 × 4
⎝
⎠
Example: Downwards => 3.20 V
Output Voltage Adjust Downwards, Decrease:
V = 1.1508 V
3.20 − 3.30
⎛
⎝
⎞
⎠
1.225 + 2.45×
⎜
⎟
100
⎛
⎞
3.3
Radj = 5.11×
− 2 kΩ
⎜
⎝
⎟
Δ%
⎠
Example: Decrease 4% =>Vout = 3.168Vdc
100
4
⎛
⎞
⎠
5.11×
− 2 kΩ = 117.5kΩ
⎜
⎝
⎟
ERICSSON [ ERICSSON ]
