參數(shù)資料
型號(hào)： P62000NLG
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, QCC64
封裝： ROHS COMPLIANT, QFN-64
文件頁(yè)數(shù)： 16/62頁(yè)
文件大小： 1221K
代理商： P62000NLG
IDTP62000
2/3/4-PHASE PWM CONTROLLER WITH DYNAMIC VOLTAGE & FREQUENCY SCALING
IDT 2/3/4-PHASE PWM CONTROLLER WITH DYNAMIC VOLTAGE & FREQUENCY SCALING
23
IDTP62000
REV E 050510
CONFIDENTIAL
resumes.
If PSI and DEC are both enabled, PSI# low indicates that the minimum number of DEC phases is used regardless of the
current load. When PSI# is raised from low to high, all phases are used and then normal DEC operation resumes.
Figure 20: DEC Level with PSI Assertion/De-assertion
Oscillator Frequency Selection
The IDTP62000 oscillator can be programmed by an external Rosc resistor. The resistor can be calculated from the following
equation:
(Eq. 3)
where fsw is the switching frequency of the PWM regulator in kHz, and Rosc is in kΩ.
Conversely a given Rosc will yield a specific frequency:
(Eq. 4)
Example 1: Given a required switching frequency of 250 kHz and using Equation 3 the resulting Rosc value is 102.6 kΩ. Using
Equation 4 and selecting the closest standard 1% value of 102 k
Ω results in a switching frequency of 251.3 kHz.
Example 2: Given a required switching frequency of 500 kHz and using Equation 3 the resulting Rosc value is 47.95 kΩ. Using
Equation 4 and selecting the closest standard 1% value of 47.5 k
Ω results in a switching frequency of 504.3 kHz.
DEC_LEVEL_1 (H)
DEC_LEVEL_1 (L)
2 Phases
Active
DEC_LEVEL_2 (H)
DEC_LEVEL_2 (L)
High
Low
Programmable
Delay
4 Phases Active
1 Phases Active
Normal DEC operation
1 Phase Active
3 Phases Active
Programmable Window
Programmable
Delay
3 Phases
Active
2 Phases
Active
PSI#
Current Load
DEC operation ceased
DEC operation resumes
0971
.
1
43839
×
=
SW
OSC
f
R
9114
.
0
17015
×
=
OSC
SW
R
f
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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