APXW005A0X3-SRZ Datasheet, PDF (14/21 Pages) Lineage Power Corporation – 9-36V ProLynxTM 5A: Non-Isolated DC-DC Power Modules

Preliminary Data Sheet
9-36V ProLynx^TM 5A: Non-isolated DC-DC Power Modules
July 22, 2010
9 – 36Vdc input; 3Vdc to 18Vdc output; 5A to 2.5A output current
Vo
Rmargin-down
MODULE
Q2
Trim
Rtrim
Rmargin-up
Q1
GND
Figure 37. Circuit Configuration for margining
Output voltage
Tunable Loop^TM
The 9-36V ProLynx^TM modules have a new feature that
optimizes transient response of the module called
Tunable Loop^TM.
External capacitors are usually added to the output of
the module for two reasons: to reduce output ripple and
noise (see Figs 30 and 31) and to reduce output voltage
deviations from the steady-state value in the presence
of dynamic load current changes. Adding external
capacitance however affects the voltage control loop of
the module, typically causing the loop to slow down with
sluggish response. Larger values of external
capacitance could also cause the module to become
unstable.
The Tunable Loop^TM allows the user to externally adjust
the voltage control loop to match the filter network
connected to the output of the module. The Tunable
Loop^TM is implemented by connecting a series R-C
between the SENSE and TRIM pins of the module, as
shown in Fig. 38. This R-C allows the user to externally
adjust the voltage loop feedback compensation of the
module.
Recommended values of RTUNE and CTUNE for different
output capacitor combinations are given in Tables 2, 3
and 4. Tables 2 and 3 show recommended values of
RTUNE and CTUNE for different values of ceramic output
capacitors up to 100μF that might be needed for an
application to meet output ripple and noise
requirements. Selecting RTUNE and CTUNE according to
Tables 2 and 3 will ensure stable operation of the
module
In applications with tight output voltage limits in the
presence of dynamic current loading, additional output
capacitance will be required. Table 4 lists recommended
values of RTUNE and CTUNE in order to meet 2% output
voltage deviation limits for some common output
voltages in the presence of a 50% of full load step
change with an input voltage of 12 or 28V.
VOUT
SENSE
MODULE
TRIM
GND
RTUNE
CO
CTUNE
RTrim
Figure. 38. Circuit diagram showing connection of
RTUME and CTUNE to tune the control loop of the
module.
Please contact your Lineage Power technical
representative to obtain more details of this feature as
well as for guidelines on how to select the right value of
external R-C to tune the module for best transient
performance and stable operation for other output
capacitance values or input voltages other than 12 /
28V.
Table 2. General recommended values of of RTUNE
and CTUNE for Vin=12V and various external ceramic
capacitor combinations.
Vo=5V
Co
RTUNE
CTUNE
1x10μF
330
1000pF
2x10μF
330
1500pF
4x10μF
220
2200pF
6x10μF
150
3300pF
10x10μF
150
4700pF
Table 3. General recommended values of of RTUNE
and CTUNE for Vin=28V and various external ceramic
capacitor combinations.
Vo=5V
Co 1x10μF 2x10μF 4x10μF 6x10μF 10x10μF
RTUNE
CTUNE
330
220pF
220
390pF
220
150
150
680pF 1000pF 1800pF
Vo=12V
Co 1x10μF
RTUNE
CTUNE
330
150pF
2x10μF
220
220pF
4x10μF
220
470pF
6x10μF
150
1000pF
10x10μF
150
1500pF
Table 4. Recommended values of RTUNE and CTUNE to
obtain transient deviation of 2% of Vout for a 50% of
full load step.
Vin
12V
Vo 3.3V
5V
ΔI 2.5A
2A
3.3V
2.5A
28V
5V
12V 18V
2A 1.5A 1A
Co
1x330μF
polymer
1x330μF
polymer
1x330μF
polymer
1x330μF
polymer
3x10μF 1x10μF
RTUNE
CTUNE
ΔV
150
22nF
36mV
150
22nF
28mV
150
10nF
31mV
150 150 220
10nF 470pF 150pF
25mV 222mV 240mV
LINEAGE POWER
14