Texas Instruments 2.25A Inverting Buck Boost Regulator Evaluation Module TPS5430EVM-342 TPS5430EVM-342 Datenbogen
Produktcode
TPS5430EVM-342
R2
+
10 k
W
1.221 V
V
O
*
1.221 V
(1)
1.4.2
Input Voltage Range
2
Test Setup and Results
2.1
Input / Output Connections
www.ti.com
Test Setup and Results
lists the R3 values for some common output voltages. The values given in
are standard
values, not the exact value calculated using
CAUTION
V
IN
must be in a range so that the minimum on-time is greater than 200 ns, and
the maximum duty cycle is less than 87%.
Table 3. Output Voltages Available
Output Voltage (V)
R
3
Value (k
Ω
)
-1.8
21.5
-2.5
9.53
-3.3
5.90
-5
3.24
The EVM is designed to operate from a nominal 12 V, 15 V, or 18 V
±
10% input voltage. The TPS5430 is
specified to operate over an input voltage range of 5.5 V to 36 V. The EVM may not be operated over this
range without damage as the input bypass capacitor is rated at 25 V. This capacitor was chosen for its
small package size. Additionally, the voltage differential from input to output cannot exceed the maximum
operating range of the input voltage, 36 V.
range without damage as the input bypass capacitor is rated at 25 V. This capacitor was chosen for its
small package size. Additionally, the voltage differential from input to output cannot exceed the maximum
operating range of the input voltage, 36 V.
This section describes how to properly connect, set up, and use the TPS5430EVM-342 evaluation
module. The section also includes test results typical for the TPS5430EVM-342 and covers efficiency,
output voltage regulation, load transients, loop response, output ripple, input ripple, and startup.
module. The section also includes test results typical for the TPS5430EVM-342 and covers efficiency,
output voltage regulation, load transients, loop response, output ripple, input ripple, and startup.
The TPS5430EVM-342 is provided with input/output connectors and test points as shown in
. A
power supply capable of supplying 3 A should be connected to J1 through a pair of 20 AWG wires. The
load should be connected to J2 through a pair of 20 AWG wires. The maximum load current capability
should be 2.25 A. Wire lengths should be minimized to reduce losses in the wires. Test-point TP1
provides a place to monitor the VIN input voltages with TP2 providing a convenient ground reference. TP5
is used to monitor the output voltage with TP4 as the ground reference.
load should be connected to J2 through a pair of 20 AWG wires. The maximum load current capability
should be 2.25 A. Wire lengths should be minimized to reduce losses in the wires. Test-point TP1
provides a place to monitor the VIN input voltages with TP2 providing a convenient ground reference. TP5
is used to monitor the output voltage with TP4 as the ground reference.
Table 4. EVM Connectors and Test Points
Reference
Function
Designator
J1
V
IN
, 12 V nominal, 10.8 V to 19.8 V
J2
OUT, -5 V at 2.25A maximum
JP1
2-pin header for enable. Connect EN to the -5 V output to disable, open to enable.
TP1
V
IN
test point at V
IN
connector
TP2
GND test point at V
IN
TP3
PH test point
TP4
GND test point at OUT connector
SLVU243 – May 2008
TPS5430EVM-342 2.25-A, Inverting Buck-Boost Regulator Evaluation Module
3