參數(shù)資料
型號(hào): TPS56302PWPR
英文描述: SMPS Controller
中文描述: 開(kāi)關(guān)電源控制器
文件頁(yè)數(shù): 27/34頁(yè)
文件大?。?/td> 811K
代理商: TPS56302PWPR
TPS56302
DUAL-OUTPUT LOW-INPUT-VOLTAGE
DSP POWER SUPPLY CONTROLLER WITH SEQUENCING
SLVS289A
MARCH 2000
REVISED OCTOBER 2000
27
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
layout and component value consideration (continued)
5.
When configuring the high-side driver as a boot-strap driver, the connection from BOOTLO to the power
FETs should be as short and as wide as possible. LOSENSE/LOHIB should have a separate connection
to the FETs since BOOTLO will have large peak current flowing through it.
6.
The bulk storage capacitors across V
IN
should be placed close to the power FETs. High-frequency bypass
capacitors should be placed in parallel with the bulk capacitors and connected close to the drain of the
high-side FET and to the source of the low-side FET.
7.
HISENSE and LOSENSE/LOHIB should be connected very close to the drain and source, respectively, of
the high-side FET. HISENSE and LOSENSE/LOHIB should be routed very close to each other to minimize
differential-mode noise coupling to these traces. Ceramic decoupling capacitors should be placed close to
where HISENSE connects to V
IN
, to reduce high-frequency noise coupling on HISENSE.
The EVM board (SLVP-139) is used in the test. The test results are shown in the following.
Figure 23
IO
Output Current
A
EFFICIENCY OF
RIPPLE REGULATOR (3.3 V)
60
40
1
3
80
70
50
2
4
5
100
0
E
90
VIN = 5 V
Figure 24
IO
Output Current
A
RIPPLE REGULATOR
LOAD REGULATION (3.3 V)
2
1
3
0
1
2
4
5
1
0
2
VIN = 5 V
L
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