Ericsson Internal
E
EAB/FJB/GMF Oscar Persson
PRODUCT SPECIFICATION
4 (10)
Prepared (also subject responsible if other)
No.
2/1301 BMR 662 Uen
7
Technical Specification
Approved
Checked
Date
Rev
Reference
EN/LZT 146 420 R2A May 2010
PKB 4000A series Direct Converters
Input 38-72 V, Output up to 30 A / 125 W
EAB/FJB/GMF [Natalie Johansson]
(MICRF)
2010-05-04
B
© Ericsson AB
3.3V, 30A /99W Typical Characteristics
Start-up
PKB 4910A PI
Shut-down
Start-up enabled by connecting VI at:
P1 = +25°C, VI = 53 V,
IO = 30 A resistive load.
Top trace: output voltage (1 V/div.).
Bottom trace: input voltage (50 V/div.).
Time scale: (5 ms/div.).
Shut-down enabled by disconnecting VI at:
Top trace: output voltage (1 V/div.).
Bottom trace: input voltage (50 V/div.).
Time scale: (50 us/div.).
T
T
P1 = +25°C, VI = 53 V,
IO = 30 A resistive load.
Output Ripple & Noise
Output Load Transient Response
Output voltage ripple at:
TP1 = +25°C, VI = 53 V,
IO = 30 A resistive load.
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.).
change (7.5-22.5-7.5 A) at:
Bottom trace: load current (10 A/div.).
Time scale: (0.1 ms/div.).
TP1 = +25°C, VI = 53V, Co = 3mF.
Output Voltage Adjust (see operating information)
Passive adjust
Active adjust
The resistor value for an adjusted output voltage is calculated by using
the following equations:
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:
Output Voltage Adjust Upwards, Increase:
⎛
⎞
(
100 + ∆%
1.225 × ∆%
)
510
⎞
Vdesired − 3.30
⎛ 5.1× 3.30
Vadj = ⎜1.225 + 2.45 ×
⎟ V
Radj = ⎜
−
− 10.2⎟ kΩ
⎜
⎟
⎜
⎟
3.30
⎝
⎠
∆%
⎝
⎠
Example: Upwards => 3.50 V
Example: Increase 4% =>Vout = 3.432 Vdc
⎛
⎞
3.50 − 3.30
⎛ 5.1× 3.30
(
100 + 4
1.225 × 4
)
510
4
⎞
⎜1.225 + 2.45 ×
⎟ V = 1.37 V
⎜
⎟
⎜
⎜
−
− 10.2⎟ kΩ = 220 kΩ
3.30
⎟
⎝
⎠
⎝
⎠
Output Voltage Adjust Downwards, Decrease:
100
⎛
⎞
⎠
Radj = 5.11×
− 2 kΩ
⎜
⎝
⎟
∆%
ERICSSON [ ERICSSON ]
