參數資料
型號： L4974A
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 5.5 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PDIP20
封裝： POWER, PLASTIC, DIP-20
文件頁數： 2/22頁
文件大小： 6679K
代理商： L4974A
PART LIST
R1 = 30K
R2 = 10K
R3 = 15K
R4 = 30K
R5 = 22
R6 = 4.7K
R7 = see table A
R8 = OPTION
R9 = 4.7K
* C1 = C2 = 1000
F 63V EYF (ROE)
C3 = C4 = C5 = C6 = 2,2
F 50V
C7 = 390pF Film
C8 = 22nF MKT 1837 (ERO)
C9 = 2.7nF KP 1830 (ERO)
C10 = 0.33
F Film
C11 = 1nF
** C12 = C13 = C14 = 100
F 40V EKR (ROE)
C15 = 1
F Film
D1 = SB 560 (OR EQUIVALENT)
L1 = 150
H
core 58310 MAGNETICS
45 TURNS 0.91mm (AWG 19)
COGEMA 949181
* 2 capacitors in parallel to increase input RMS current capability.
* * 3 capacitors in parallel to reduce total output ESR.
Table A
V0
R9
R7
12V
15V
18V
24V
4.7k
4.7k
4.7k
4.7k
6.2kW
9.1k
12
18
Table B
SUGGESTED BOOSTRAP CAPACITORS
Operating Frequency
Boostrap Cap.c10
f = 20KHz
≥680nF
f = 50KHz
≥470nF
f = 100KHz
≥330nF
f = 200KHz
≥220nF
f = 500KHz
≥100nF
Figure 6a : Component Layout of fig.5 (1 : 1 scale). Evaluation Board Available
L4974A
10/22
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相關代理商/技術參數
參數描述
L4974A 制造商:STMicroelectronics 功能描述:IC SWITCHING REG 3.5A 4974 DIP20
L4974AE 制造商:STMicroelectronics 功能描述:
L4975 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5A SWITCHING REGULATOR
L4975A 功能描述:直流/直流開關調節(jié)器 5.1 to 40V Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L4975A 制造商:STMicroelectronics 功能描述:SWITCHING REG 5A 4975 MULTIWATT15
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