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參數(shù)資料
| 型號： | CS5332GDW28 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | SOP-28 |
| 文件頁數(shù)： | 9/20頁 |
| 文件大?。?/td> | 400K |
| 代理商： | CS5332GDW28 |
CS5332
http://onsemi.com
17
RV(DRP) + DVDRP
RV(FB) DVOUT
Calculate Input Filter Capacitor Current Ripple
The procedure below assumes that phases do not overlap
and output inductor ripple current (PP) is less than the
average output current of one phase.
9. Calculate Input Current
IIN +
VOUT
IOUT
(Efficiency
VIN)
10. Calculate Duty Cycle (per phase).
Duty Cycle +
VOUT
(Efficiency
VIN)
11. Calculate Apparent Duty Cycle.
Apparent Duty Cycle + Duty Cycle
#of Phases
12. Calculate Input Filter Capacitor Ripple Current. Use
the chart in Figure 17 to calculate the normalized
ripple current (KRMS) based on the reciprocal of
Apparent Duty Cycle. Then multiply the input current
by KRMS to obtain the Input Filter Capacitor Ripple
Current.
Ripple (RMS) + IIN
KRMS
4.00
3.50
3.00
2.50
2.00
1.50
1.00
0.50
0.00
1/ Apparent Duty Cycle
Frequency
,kHz
15
10
5
0
Figure 17. Normalized Input Filter Capacitor
Ripple Current
DESIGN EXAMPLE
Choose the component values for a 240 kHz, 12 V to 1.525
V, 41 A converter with lossless current sensing, adaptive
positioning and a 50 A current limit. The adaptive
positioning is chosen 50 mV below the DAC setting at no
load and 50 mV below the noload position with 41 A out.
The peak output voltage transient is 70 mV max during a 41
A step current.
Current Sensing, Power Stage and
Output Filter Components
1.Assume 1.5 mΩ of output filter ESR.
R
+ (VIN * VOUT)
(VOUT VIN) (F
C
25 mV)
+ (12 * 1.55)
(1.55 12) (240 k
.01mF
25mV)
+ 22.5 k
L RL + .01 mF
22.5 kW + 225 ms
Choose RL + 2.0 mW
L + 2.0 mW
225 ms + 450 nH
2.
3. n/a
PwrstgZ + RL
CSA Gain 2.0
+ 2.0 mW
3.15 2 + 3.1 mW
ConverterZ
+
PwrstgZ
ESR
PwrstgZ ) ESR
+ 3.1 mW
1.5 mW
3.1 mW ) 1.5 mW
^ 1.0 mW
DVR + 1.0 mW
41 A + 41 mV
4.
5. n/a
Current Limit
VI(LIM) + RL
IOUT(LIM)
CS to ILIM Gain
+ 2.0 mW
50 A
6.25 + 625 mV
6.
Adaptive Positioning
RV(FB) + NL Position VFB Bias Current
+ 50 mV 18 mA + 2.78 kW
7.
DVDRP + RL
IOUT
Current Sense to VDRP Gain
+ 2.0 mW
41 A
3.1 + 254 mV
RV(DRP) + DVDRP
RV(FB) DVOUT
+ 254 mV
2.78 kW 50 mV + 25.4 kW
8.
IIN + 1.52 V
41 A
(0.85
12VIN)
+ 6.1 A
9.
Duty Cycle +
1.52 V
(0.85
12 VIN)
+ 0.15
10.
Apparent Duty Cycle + 0.15
2.0 + 0.3
11.
RMS ripple is 6.1 A
1.5 + 9.2 A
12.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CS5332GDWR28 | 功能描述:IC REG CTRLR BUCK PWM 28-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| CS5333 | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:24-Bit, 96 kHz Stereo A/D Converter |
| CS5333-BZ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CS5333-KZ | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:24-Bit, 96 kHz Stereo A/D Converter |
| CS5333-KZR | 制造商:Cirrus Logic 功能描述: |
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