Texas Instruments TLV61220EVM-120 Evaluation Module TLV61220EVM-120 TLV61220EVM-120 Ficha De Dados
Códigos do produto
TLV61220EVM-120
Introduction
1
Introduction
The TLV61220EVM-120 evaluation module (EVM) helps designers evaluate the operation and
performance of the TLV61220 boost converter. The TLV61220 is an adjustable output version that can be
set between 1.8 V and 5.5 V. The output of this EVM is set to 3.3-V out. The output voltage can be
changed between 1.8 V and 5.5 V by adjusting the value of R1 and R2. See
performance of the TLV61220 boost converter. The TLV61220 is an adjustable output version that can be
set between 1.8 V and 5.5 V. The output of this EVM is set to 3.3-V out. The output voltage can be
changed between 1.8 V and 5.5 V by adjusting the value of R1 and R2. See
for common output
voltages and recommended values for R1 and R2; also see the data sheet of the TLV61220 (
for more information. The device is packaged in a 6-pin, thin, SOT-23 package (DBV).
2
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the TLV61220EVM-120.
up, and use the TLV61220EVM-120.
2.1
Input and Output Connections and Jumper Descriptions
•
J1-J3: Input Connections
This is the connection for the leads from the input source. Connect the positive connection to the Vin
(J1) and the negative connection to the GND (J3).
(J1) and the negative connection to the GND (J3).
•
J4-J6: Output Connections
This is the connection for the output of the TLV61220EVM-120. Connect the positive connection of the
load to the Vout (J4) and the negative connection to the GND (J6).
load to the Vout (J4) and the negative connection to the GND (J6).
•
JP1-EN: Enable pin
This is the enable input for the device. Place a shorting jumper across the ON and EN pins of JP1 to
enable the integrated circuit (IC). Place a shorting jumper across the OFF and EN pins of JP1 to
disable the IC. A shorting jumper must be installed on JP1 in either the ON or OFF positions. A pullup
resistor is used to enable the IC in case the jumper is not installed.
enable the integrated circuit (IC). Place a shorting jumper across the OFF and EN pins of JP1 to
disable the IC. A shorting jumper must be installed on JP1 in either the ON or OFF positions. A pullup
resistor is used to enable the IC in case the jumper is not installed.
•
J2-J5: Vin Sense and Vout Sense
The two connectors are not installed, but if very accurate measurements of input or output voltage are
required, J2 or J5 can be installed for the measurements. Traces on the printed-circuit board (PCB)
connect to the input or output capacitor and run independent of the output and ground lines to the two
connectors.
required, J2 or J5 can be installed for the measurements. Traces on the printed-circuit board (PCB)
connect to the input or output capacitor and run independent of the output and ground lines to the two
connectors.
2.2
Modifications
These evaluation modules are designed to provide access to the features of the TLV61220. However,
some modifications can be made to this module.
some modifications can be made to this module.
2.2.1
Output Voltage
The output voltage of this part is set by the resistor divider network of R1 and R2. To change the output
voltage of the EVM, it is necessary to change the value of resistors. The value of R1 for a specific output
voltage and specific resistor R2 can be calculated using
voltage of the EVM, it is necessary to change the value of resistors. The value of R1 for a specific output
voltage and specific resistor R2 can be calculated using
:
R1 = R2 (Vout/0.5 – 1)
(1)
lists the R1 and R2 values for some common output voltages. The values given in
are
standard values, not the exact value calculated using
.
Table 1. Changing Output Voltage With R1 and R2
Vout (V)
R1 (k
Ω
)
R2 (k
Ω
)
5
1000
110
4.2
1000
137
3.6
1000
162
3.3
1000
178
3
1000
200
2.5
1000
249
2
499
165
2
TLV61220EVM-120, Low-Input Voltage, Step-Up Converter Evaluation
SLVU671 – February 2012
Module
Copyright © 2012, Texas Instruments Incorporated