Texas Instruments TLV61220EVM-120 Evaluation Module TLV61220EVM-120 TLV61220EVM-120 데이터 시트
제품 코드
TLV61220EVM-120
Operation
Table 1. Changing Output Voltage With R1 and
R2 (continued)
Vout (V)
R1 (k
Ω
)
R2 (k
Ω
)
1.8
499
191
3
Operation
Connect the positive input power supply to the Vin (J1) and GND (J3). Typical input voltage is 0.7 V to 3.3
V for this configuration of output voltage. The TLV61220EVM-120 has a maximum input voltage of 5.5 V
with correct output voltage.
V for this configuration of output voltage. The TLV61220EVM-120 has a maximum input voltage of 5.5 V
with correct output voltage.
Connect the desired load between the Vout (J4) and GND (J6). The TLV61220 maximum output current
depends on the conversion ratio between input and output along with Vout; consult the data sheet for
additional information.
depends on the conversion ratio between input and output along with Vout; consult the data sheet for
additional information.
Configure jumper JP1 as required; the EN pin is not pulled up or down inside the device or on the EVM.
JP1 must be installed for proper operation. ON is normal operation. In the OFF position, the device is shut
down, and switching has stopped.
JP1 must be installed for proper operation. ON is normal operation. In the OFF position, the device is shut
down, and switching has stopped.
Note that the device does not disconnect the input from the output during a shutdown condition. The
voltage is reduced through impedance of the TLV61220 and varies with load; at light load, voltage drop is
approximately 700 mV.
voltage is reduced through impedance of the TLV61220 and varies with load; at light load, voltage drop is
approximately 700 mV.
4
Test Results
This section provides typical performance waveforms for the TLV61220EVM-120 characteristic of this
EVM design. For more information, see the Typical Characteristics section of the TLV61220 data sheet.
This EVM uses the same inductors and capacitors as those used for characterization in the data sheet.
Performance is consistent with that shown in the data sheet.
EVM design. For more information, see the Typical Characteristics section of the TLV61220 data sheet.
This EVM uses the same inductors and capacitors as those used for characterization in the data sheet.
Performance is consistent with that shown in the data sheet.
4.1
Continuous-Current Mode Operation
shows the output voltage ripple, the SW node, and the inductor current during continuous-current
operation of the TLV61220. The measurements are done with 1.2-V input voltage, 1.8-V output voltage,
and 50-mA load.
and 50-mA load.
Figure 1. Continuous-Current Operation, TLV61220EVM
3
SLVU671 – February 2012
TLV61220EVM-120, Low-Input Voltage, Step-Up Converter Evaluation
Module
Copyright © 2012, Texas Instruments Incorporated