參數(shù)資料
型號(hào): TPS55383PWPRG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 7 A DUAL SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16
封裝: PLASTIC, HTSSOP-26
文件頁(yè)數(shù): 18/45頁(yè)
文件大?。?/td> 1318K
代理商: TPS55383PWPRG4
T
Time
-
Output1
Output2
PVDD1
PVDD2
Multiphase Operation
www.ti.com ......................................................................................................................................................................................... SLUS818 – SEPTEMBER 2008
Figure 28. Waveforms Resulting from Cascading PVDD1 from Output 2
In this configuration, the following conditions must be maintained:
1. Output 2 must be of a voltage high enough to maintain regulation of Output 1 under all load conditions.
2. The sum of the current drawn by Output 2 load plus the current into PVDD1 must be less than the overload
protection current level of Output 2.
3. The method of output sequencing must be such that the voltage on Output 2 is sufficient to support Output 1
before Output 1 is enabled. This requrement may be accomplished by:
a.
a delay of the enable function
b.
selecting sequential sequencing of Output 1 starting after Output 2 is in regulation
The TPS5538x may be configured to operate as a two-channel multiphase converter capable of delivering up to
6 A. Figure 29 indicates the recommended pin connections. In this configuration, FB2 must be tied to BP for the
maximum current configuration and the two output filter inductors must be the same value. Calculate RCOMP and
CCOMP as outlined for a single channel output, then use one-half the RCOMP value and two times the CCOMP value
as the compensation components. Contact the factory for further support.
Copyright 2008, Texas Instruments Incorporated
25
Product Folder Link(s): TPS55383 TPS55386
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