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參數(shù)資料
| 型號(hào)： | 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)： | 22/38頁 |
| 文件大?。?/td> | 424K |
| 代理商： | NCP5331FTR2 |
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NCP5331
http://onsemi.com
22
Power Dissipation
NCP5331 power dissipation may be approximated by the
following equation:
Ploss
FSW· (VCCH· QTHighFETs
VCCLx· QTLowFETs)
PQuiescent
where:
PQuiescent
VCCL· ICCL
(VCCH
2 · VCCLx·ICCLx
Vin) · ICCH
F
SW
is the switching frequency
V
CCL
is 12 V
V
CCLx
is the low-side gate drive voltage and may be varied
between 5.0 and 12 V
V
CCH
is the high-side gate drive voltage and is between 4.5
and 7.0 V
V
in
is the input voltage to the converter and is either 5.0 or
12 V
I
CCL
, I
CCLx
, I
CCH
are typical device quiescent currents and
can be found under the General Electrical Specifications.
Q
THighFETs
is the sum of the High-Side MOSFets total gate
charge
Q
TLowFETs
is the sum of the Low-Side MOSFets total gate
charge
Figure 29 shows device temperature rise versus switching
frequency at various gate drive voltage combinations using
ON Semiconductor’s NTD60N03 (Qt = 31nC at 5.0 V) as
the high-side MOSFet and NTD80N02 (Qt = 39nC at 7.0 V)
as the low-side MOSFet. Using other MOSFets will of
course result in different losses, but the general conclusion
will be the same.
If trying to drive 2 lower MOSFets at frequencies higher
than 200 KHz, it may be necessary to reduce the low-side
gate drive voltage.
Figure 29. Calculated NCP5331 temperature rise (LQFP-32 package)
versus frequency at various typical gate drive voltage combinations
with typical ON Semiconductor MOSFets.
24
27
30
33
36
39
42
45
48
51
54
57
60
63
66
69
72
75
78
81
84
100
150
200
250
300
350
FREQUENCY (kHz)
V
CCH
= 4.5 V;
V
CCLx
= 12 V;
1 Low-Side FETS
V
CCH
= 4.5 V;
V
CCLx
= 12 V;
2 Low-Side FETS
V
CCH
= 7.0 V;
V
CCLx
= 12 V;
2 Low-Side FETS
V
CCH
4.5 V;
V
CCLx
= 12 V;
2 Low-Side FETS
V
CCH
= 7.0 V;
V
CCLx
= 12 V;
1 Low-Side FETS
V
CCH
= 7.0 V;
V
CCLx
= 12 V;
2 Low-Side FETS
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| NCP5331FTR2G | 功能描述:DC/DC 開關(guān)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(guān)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(fēng)格: 封裝 / 箱體:CPAK |
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