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| 型号： | TPS62230EVM-370 |
| 厂商： | Texas Instruments |
| 文件页数： | 3/12页 |
| 文件大小： | 0K |
| 描述： | EVAL MODULE FOR TPS62230-370 |
| 标准包装： | 1 |
| 系列： | * |
| 其它名称： | 296-31250 TPS62230EVM-370-ND |
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Setup
2.1.8
2.2
JP12, JP22, and JP32 – Mode
This jumper is used to select the operating mode of the converter. The converter operates in a
fixed-frequency, low-noise, PWM mode when a jumper is used to short the MODE pin to the ON pin.
Shorting the MODE pin and OFF pin together allows the controller to use the power-saving (PFM) mode
for high efficiency at low output currents.
Converter Configurations
All converters are designed to use an input voltage between 2.05 V and 6 V. But the input voltage must be
higher than the output voltage in order to maintain voltage regulation, and U11 requires 2.5-V minimum
input. Connect the input voltage power supply and output according to Table 2 .
Table 2. Input and Output Connections
2.3
Converter No.
U11
U21
U31
Operation
Output Voltage
2.5 Vdc Fixed
1.8 Vdc Fixed
1.2 Vdc Fixed
Signal
Positive Input Voltage
Input Voltage Return
Positive Output Voltage
Output Voltage Return
Positive Input Voltage
Input Voltage Return
Positive Output Voltage
Output Voltage Return
Positive Input Voltage
Input Voltage Return
Positive Output Voltage
Output Voltage Return
Connection
J11
J13
J14
J16
J21
J23
J24
J26
J31
J33
J34
J36
The ENABLE jumper and the MODE jumper must be configured for proper operation of the converter.
For ENABLE, the converter enable uses a shorting block to set the JPX1 header to the desired
configurations. Each converter has its own header: JP11 for U11, JP21 for U21, and JP31 for U31. The
converters are shut down when the EN pin is pulled low; this is the ENABLE-to-OFF connection. The
converters are in operate mode when the EN pin is pulled high; this is the ENABLE-to-ON connection. Do
not leave the EN pin floating.
The MODE header, JPX2, controls the device power-save mode option. This mode changes the operation
at light loads; it has no impact at mid-to-high loads . The device can operate in the low-noise,
fixed-frequency PWM mode or high-efficiency, power-saving PFM mode at low power. Each converter has
its own mode header: JP12 for U11, JP22 for U21, and JP32 for U31. The converters are in PWM mode
when the MODE pin is pulled high; this is the MODE-to-ON connection. The converters operate in PFM
mode when the MODE pin is pulled low; this is the MODE-to-OFF connection. Do not leave the MODE pin
floating.
2.4
Test Results
See the Typical Characteristics section of the TPS62230 data sheet. This EVM uses the same inductors
and similar capacitors as those used for characterization in the data sheet. Performance is consistent with
that shown in the data sheet.
SLVU312 – June 2009
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TPS62230EVM-370 User's Guide
3
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