Texas Instruments High Performance Dual Output Synchronous Buck Evaluation Module using the TPS51220A TPS51220AEVM-476 TPS51220AEVM-476 데이터 시트
제품 코드
TPS51220AEVM-476
User
'
s Guide
SLUU381A
–
September 2009
–
Revised May 2011
High Performance Dual Output Synchronous Buck EVM
Contents
1
Introduction
..................................................................................................................
2
Description
...................................................................................................................
2.1
Typical Applications
................................................................................................
2.2
Features
.............................................................................................................
3
Electrical Performance Specifications
....................................................................................
4
Schematic
....................................................................................................................
5
Test Setup
...................................................................................................................
5.1
Test Equipment
.....................................................................................................
5.2
Recommended Test Setup
.......................................................................................
5.3
List of Test Points
..................................................................................................
6
Test Procedure
..............................................................................................................
6.1
Line/Load Regulation and Efficiency Measurement Procedure
..............................................
6.2
Output Ripple Test
.................................................................................................
6.3
Measuring Improved Light Load Efficiency
.....................................................................
6.4
Control Architecture and OVP Select
..........................................................................
6.5
Over Current Trip Level and Output Discharge Select
......................................................
7
Performance Data and Typical Characteristic Curves
................................................................
7.1
Efficiency
..........................................................................................................
7.2
Load Regulation
..................................................................................................
7.3
Bode Plot
..........................................................................................................
7.4
Transient Response
..............................................................................................
7.5
Output Ripple and Switch Node
................................................................................
7.6
Turn-On Waveform
...............................................................................................
7.7
Turn-Off Waveform
...............................................................................................
8
EVM Assembly Drawing and PCB Layout
.............................................................................
9
List of Materials
............................................................................................................
List of Figures
1
TPS51220A EVM-476 Schematic
........................................................................................
2
TPS51220A EVM-476 Recommended Test Set Up
....................................................................
3
Recommended
“
Tip and Barrel
”
Technique to Measure Output Ripple Voltage
...................................
4
Efficiency, 12 V
IN
, 5.0-V Output
..........................................................................................
5
Efficiency, 12 V
IN
, 3.3-V Output
..........................................................................................
6
12 V
IN
, 5.0-V Load Regulation
...........................................................................................
7
12 V
IN
, 3.3-V Load Regulation
...........................................................................................
8
CCM mode 5-V Loop Response Gain and Phase, f
CO
= 95 kHz, PM = 48
°
.......................................
9
CCM mode 3.3-V Loop Response Gain and Phase, f
CO
= 90 kHz, PM = 63
°
.....................................
10
5-V CCM Mode Load Transient
.........................................................................................
11
5-V D-CAP Mode Load Transient
......................................................................................
12
5-V CCM Mode Output Ripple and Switch Node
......................................................................
13
3.3-V CCM Mode Output Ripple
.........................................................................................
14
Enable Turn-On Waveform
...............................................................................................
1
SLUU381A
–
September 2009
–
Revised May 2011
High Performance Dual Output Synchronous Buck EVM
Copyright
©
2009
–
2011, Texas Instruments Incorporated