Ericsson Internal
EJUNGYA
PRODUCT SPECIFICATION
4 (5)
Prepared (also subject responsible if other)
No.
2/1301-BMR 636 01/A4 Uen
7
Technical Specification
Approved
Checked
Date
Rev
Reference
EN/LZT 146 382 R1A June 2007
PKB 4717 PINB
DC/DC converters, Input 36-75 V, Output 10.5 A/75 W
SEC/D (LINDA ZHONG)
2007-5-15
A
© Ericsson Power Modules AB
7.2 V/10.5 A Typical Characteristics
PKB 4717 PINB
Start-up
Shut-down
Start-up enabled by connecting VI at:
Tref = +25°C, VI = 53 V,
Top trace: output voltage (2V/div.).
Bottom trace: input voltage (20V/div.).
Time scale: (5ms/div.).
Shut-down enabled by disconnecting VI at:
Tref = +25°C, VI = 53 V,
IO = 10.5 A resistive load.
Top trace: output voltage (2V/div.).
Bottom trace: input voltage (50V/div.).
Time scale: (0.1ms/div.).
I
O = 10.5 A resistive load.
Output Ripple & Noise
Output Load Transient Response
Output voltage ripple at:
Tref = +25°C, VI = 53 V,
IO = 10.5 A resistive load.
Trace: output voltage (20mV/div.).
Time scale: (2μs/div.).
Output voltage response to load current step- Top trace: output voltage (200mV/div.).
change (2.5-7.5-2.5 A) at:
Bottom trace: load current (5A/div.).
Time scale: (0.1ms/div.).
Tref =+25°C, VI = 53 V.
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:
Output Voltage Adjust Upwards, Increase:
The output voltage may be adjusted using a voltage applied to the
Vadj pin. This voltage is calculated by using the following equations:
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
5.11×7.2
1.225×Vout −1.225×7.2
(
Vout −1.225
)
kΩ
Vdesired−7.2
⎛
⎞
⎟
V
Radj =
−10.22
V
adj = 1.225+2.45×
⎜
7.2
⎝
⎠
Output Voltage Adjust Downwards, Decrease:
Example: Upwards => 7.85 V
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
5.11×
(
2Vout − 7.2
)
kΩ
7.85 − 7.2
⎛
⎜
⎞
⎟
Radj =
1.225 + 2.45×
V = 1.45 V
7.2 −Vout
7.2
⎝
⎠
Example: Upwards =>Vout = 7.85 Vdc
5.11 × 7.2
1.225 × 7.85 − 1.225 × 7.2
(
7.85 − 1.225
)
⎛
⎜
⎞
⎟
kΩ = 296 kΩ
− 10 .22
⎝
⎠
ERICSSON [ ERICSSON ]
