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參數(shù)資料
| 型號： | NCP5331FTR2 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Two-Phase PWM Controller with Integrated Gate Drivers |
| 中文描述： | 1.5 A SWITCHING CONTROLLER, 750 kHz SWITCHING FREQ-MAX, PQFP32 |
| 封裝： | LQFP-32 |
| 文件頁數(shù)： | 29/38頁 |
| 文件大?。?/td> | 424K |
| 代理商： | NCP5331FTR2 |
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NCP5331
http://onsemi.com
29
-
+
+
-
G
VDRP
Σ
R
S1
CS1
C
S1
L1
I
MAX
/2
+
-
G
VDRP
R
S2
CS2
C
S2
L2
I
MAX
/2
CS
REF
COMP
Error
Amp
VID Setting
IBIAS
VFB
R
DRP
R
F1
V
DRP
= VID +
I
MAX
R
L
G
VDRP
V
FB
= VID
V
CORE
I
DRP
I
FBK
V
CORE
= VID - (I
DRP
- IBIAS
VFB
) R
F1
Figure 34. AVP Circuitry at Full-Load
I
DRP
= I
MAX
R
L
G
VDRP
/R
DRP
I
FBK
= I
DRP
- IBIAS
VFB
+ -
Figure 35. V
DRP
Tuning, RC Time Too Long
NOTE:
The RC time constant of the current sense network is
too long (slow); V
DRP
and V
CORE
respond too slowly.
Figure 36. V
DRP
tuning, RC Time Too Short
NOTE:
The RC time constant of the current sense network is
too short (fast); V
DRP
and V
CORE
both overshoot.
7. Current Sensing
For inductive current sensing, choose the current sense
network (RSx, CSx) to satisfy
RSx
CSx
Lo (RL
RPCB)
(32)
For resistive current sensing, choose the current sense
network (RSx, CSx) to satisfy
RSx
CSx
Lo (Rsense)
(33)
This will provide an adequate starting point for RSx and
CSx. After the converter is constructed, the value of RSx
(and/or LSx) should be fine-tuned in the lab by observing
the V
DRP
signal during a step change in load current. Tune
the RSx
CSx network to provide a “square-wave” at the
V
DRP
output pin with maximum rise time and minimal
overshoot as shown in Figures 34 - 36.
Figure 37. V
DRP
Tuning, RC Time Optimal
NOTE:
The RC time constant of the current sense network is
optimal; V
DRP
and V
CORE
respond to the load current
quickly without overshooting.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| NCP5331FTR2G | 功能描述:DC/DC 開關控制器 2 Phase Buck w/Gate Drivers for Athlon RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| NCP5332A | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Two-Phase Buck Controller with Integrated Gate Drivers and 5-Bit DAC |
| NCP5332A/D | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Two-Phase Buck Controller with Integrated Gate Drivers and 5-Bit DAC |
| NCP5332ADW | 功能描述:DC/DC 開關控制器 2 Phase Buck w/Gate RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| NCP5332ADWR2 | 功能描述:DC/DC 開關控制器 2 Phase Buck w/Gate RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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