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NCP1034DR2G 数据手册 - ON Semiconductor（安森美）
制造商:
ON Semiconductor（安森美）
分类:
DC/DC转换器
封装:
SOIC-16
描述:
ON SEMICONDUCTOR NCP1034DR2G 控制器, PWM, 18V-10V电源, 500 kHz, SOIC-16 新
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页面导航:
引脚图在P1Hot
典型应用电路图在P1P19P23
原理图在P2
封装尺寸在P24
焊盘布局在P24
型号编码规则在P1P23P24
标记信息在P1P24
封装信息在P23
功能描述在P3
技术参数、封装参数在P4P23
应用领域在P1
电气规格在P5P6
型号编号列表在P4
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NCP1034DR2G数据手册
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NCP1034
www.onsemi.com
19
P
D
+
ǒ
V
INmax
* V
ZT
R
*
I
CS
Ǔ
@ V
ZT
(eq. 34)
P
T
+
ǒ
V
INmax
* V
CC
Ǔ
@
ǒ
I
CS
) I
CD
Ǔ
(eq. 35)
Table 2. POWER SUPPLY REGULTOR EXAMPLES
Components MOSFETs
Q
G(TOT)
(nC)
f
(kHz)
V
INmax
(V)
V
INmin
(V)
I
SUPPLYmax
(mA)
R
BIAS
(kW)
ZD Transistor
LS−FET NTD24N06 24
200 60 36 8.7 2.6 MMSZ4699 −
HS−FET NTD3055 7.1
LS−FET NTD24N06 24
300 60 20 16.9 10 MMSZ4699 MJD31
HS−FET NTD24N06 24
PCB Layout
The layout of high−frequency and high−current switching
converters has a large impact on the circuit parameters. It is
important, therefore, to pay close attention to the PCB
layout.
The input capacitor, MOSFETs, inductor and output
capacitor should be placed as close as possible to one
another. This is suitable to reduce EMI and to minimize VS
overshoots. Connecting the signal and power ground at one
point near the output connector improves load regulation.
Connection between the source pin of the low side MOSFET
and the IC should be very short with wide traces and
optimally using two layers to achieve minimum inductance
between them.
The blocking and bootstrap capacitors should be placed as
close as possible to the IC. The feedback and compensation
network should be close to the IC to minimize noise.
TYPICAL APPLICATION
Figure 33. Single Output Buck Converter from 38 V − 58 V to 5 V/5 A @ 200 kHz
12
5
15
4
16
1
14
10
11
13
7
6
2
3
R7
10k
R6
20k
C5
220n
R5
3k9
VCC
SYNC
RT
UVLO
OCSET
GND
HDRV
VS
OCIN
LDRV
PGND
FB
COMP
SS/SD
C10
100n
D1
1N4148
C4
100n
R4
110k
IC1
NCP1034SMD
89
DRVVCC VB
R3
4k7
C7
330p
C6
12n
R8
10k
48 V $20%
C1A
2u2
C9
47
C9B
47
Q2
NTD3055
Q3
NTD24N06
L1
13
R2
5k6
R1
16k9
R9
1k2
C8
1n8
GND GND GND GND GND
GND
GND
GND
GND
C1B
2u2
C9C
47
GND
GND
R10
10k
GND
D2
C2
100n
C3 100n
X1−1
X1−2
X2−2
X2−1
R15
0R
R11A 10k
R11B 10k
R11C 10k
R11D 10k
R11E 10k
MMSZ4699
5V@5A, 200kHz
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