CC109146651 Lineage Power, CC109146651 Datasheet - Page 14

• Manufacturer Part Number: CC109146651
• Description: Module DC-DC 1-OUT 0.59V to 8V 4A 10-Pin SMD T/R
• Manufacturer: Lineage Power

Data Sheet
November 24, 2010
Test Configurations
Figure 49. Input Reflected Ripple Current Test
Setup.
Figure 50. Output Ripple and Noise Test Setup
Figure 51. Output Voltage and Efficiency Test
Setup.
LINEAGE
NOTE: All voltage measurements to be taken at the module
COM
Efficiency
TO OSCILLOSCOPE
Vo+
NOTE: Measure input reflected ripple current with a simulated
R
R
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
NOTE: All voltage measurements to be taken at the module
distribution
distribution
source inductance (L
possible battery impedance. Measure current as shown
above.
POWER
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
R
R
contact
contact
η =
COPPER STRIP
@ 20°C 100kHz
0.1uF
E.S.R.<0.1Ω
C
Electrolytic
S
1000μF
L
1μH
TEST
V
IN
V
V
V
COM
TEST
IN
O
IN
(+)
GROUND PLANE
. I
. I
) of 1μH. Capacitor C
O
IN
10uF
COM
V
O
Tantalum
2x100μF
C
V
x 100 %
O
IN
CURRENT PROBE
SCOPE USING
BNC SOCKET
R
R
S
contact
contact
8 – 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
offsets
V
COM
16V Pico TLynx
IN
(+)
R
R
RESISTIVE
LOAD
distribution
distribution
R
LOAD
TM
Design Considerations
Input Filtering
The 16V Pico TLynx
connected to a low ac-impedance source. A highly
inductive source can affect the stability of the
module. An input capacitance must be placed
directly adjacent to the input pin of the module, to
minimize input ripple voltage and ensure module
stability.
To minimize input voltage ripple, ceramic
capacitors are recommended at the input of the
module. Figure 52 shows the input ripple voltage
for various output voltages at 4A of load current
with 1x10 µF or 1x22 µF ceramic capacitors and an
input of 12V.
Figure 52. Input ripple voltage for various output
voltages with 1x10 µF or 1x22 µF ceramic
capacitors at the input (4A load). Input voltage is
12V.
Output Filtering
The 16V Pico TLynx
low output ripple voltage and will meet the maximum
output ripple specification with 0.1 µF ceramic and 10
µF ceramic capacitors at the output of the module.
However, additional output filtering may be required
by the system designer for a number of reasons.
First, there may be a need to further reduce the
output ripple and noise of the module. Second, the
dynamic response characteristics may need to be
customized to a particular load step change.
To reduce the output ripple and improve the dynamic
response to a step load change, additional
capacitance at the output can be used. Low ESR
polymer and ceramic capacitors are recommended to
improve the dynamic response of the module. Figure
53 provides output ripple information for different
external capacitance values at various Vo and for a
load current of 4A. For stable operation of the module,
limit the capacitance to less than the maximum output
4A: Non-isolated DC-DC Power Modules
350
300
250
200
150
100
50
0
0.5
1.5
Output Voltage (Vdc)
TM
TM
2.5
4A module should be
4A modules are designed for
3.5
4.5
1x10uF
1x22uF
5.5
14
6.5
7.5