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参数资料
| 型号： | APTH020A0X3-SRZ |
| 厂商： | LINEAGE POWER LLC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT PACKAGE-10/8 |
| 文件页数： | 8/23页 |
| 文件大小： | 556K |
| 代理商： | APTH020A0X3-SRZ |
Data Sheet
April 7, 2011
TLynxTM: Non-isolated DC-DC Power Modules:
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 20A output current
LINEAGE POWER
16
Tunable Loop
TM
The TLynx
TM series of modules have a new feature that
optimizes transient response of the module called the
Tunable Loop
TM.
External capacitors are usually added to the output of
the module for two reasons: to reduce output ripple and
noise (see Figures 36 and 37) 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. 44. This R-C allows the user to externally
adjust the voltage loop feedback compensation of the
module.
Figure. 44. Circuit diagram showing connection of
RTUME and CTUNE to tune the control loop of the
module.
Recommended values of RTUNE and CTUNE for different
output capacitor combinations are given in Tables 2, 3,
4 and 5. Tables 2 and 4 show the recommended values
of RTUNE and CTUNE for different values of ceramic output
capacitors up to 1000
μF that might be needed for an
application to meet output ripple and noise requirements
for 5Vin and 3.3Vin respectively. Selecting RTUNE and
CTUNE according to Tables 2 and 4 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. Tables 3 and 5 list
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 10A to
20A step change (50% of full load), with an input
voltage of 5Vin and 3.3Vin respectively
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 3.3 or
5V.
Table 2. General recommended values of of RTUNE
and CTUNE for Vin=5V and various external ceramic
capacitor combinations.
Cext
1x47
μF 2x47μF 4x47μF 10x47μF 20x47μF
RTUNE
47
33
22
CTUNE
3300pF 6800pF
12nF
33nF
56nF
Table 3. Recommended values of RTUNE and CTUNE to
obtain transient deviation of 2% of Vout for a 10A
step load with Vin=5V.
Table 4. General recommended values of of RTUNE
and CTUNE for Vin=3.3V and various external ceramic
capacitor combinations.
Cext
1x47
μF 2x47μF 4x47μF 10x47μF 20x47μF
RTUNE
47
33
22
CTUNE
6800pF
12nF
22nF
47nF
68nF
Table 5. Recommended values of RTUNE and CTUNE to
obtain transient deviation of 2% of Vout for a 10A
step load with Vin=3.3V.
Vout
3.3V
2.5V
1.8V
1.2V
0.6V
Cext
2x
330
μF
Polymer
Cap
2x47
μF +
2x330
μF
Polymer
Cap
3x330
μF
Polymer
Cap
4x47
μF
+ 4x330
μF
Polymer
Cap
10x330
μF
Polymer
Cap
RTUNE
47
39
33
27
CTUNE
39nF
47nF
150nF
220nF
330nF
ΔV
64mV
49mV
36mV
24mV
12mV
Vout
2.5V
1.8V
1.2V
0.6V
Cext
5x330
μF
Polymer
Cap
4x330
μF
Polymer
Cap
5x330
μF
Polymer
Cap
11x330
μF
Polymer
Cap
RTUNE
27
22
CTUNE
470nF
ΔV
48mV
36mV
24mV
12mV
MODULE
VOUT
SENSE
TRIM
GND
RTUNE
CTUNE
RTrim
C O
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