文档介绍：MOSFET
EMI LDO
1V
LDO 100mV
IC 300mV
/
EMI/EMC
LDO
LDO
/
3
/ DC-DC
/ 10kHz 100kHz
MAX1653 DC-DC
1
COUT CIN
N1
N1
N2
2
N1 COUT
LX
CIN CIN N1
COUT
IL-IINPUT N1
CIN
ESR ESL 20MHz 50MHz
CIN
I(INPUT)
660mA
0
INPUT 330mA
5V
I(CIN)
V+ VL 0
-660mA
BST
N1 I(L)
MAX1653 DH
L
LX OUTPUT
0
N2
SS
DL D
I(COUT)
0
PGND
REF
CSH 5V
GND CSL
V(LX)
0
1. N1 2. 1
N2
4
Q LC SEPIC
SEPIC
5
3
SEPIC
INPUT
4 OUTPUT
VCC
VL
EXT
CS+
REF
MAX668
PGND
FREQ
FB
GND
4.
INPUT INPUT
VCC VCC OUTPUT
VL OUTPUT VL
EXT EXT
CS+ CS+
REF REF
MAX668 MAX668
PGND PGND
FREQ FREQ
FB FB
GND GND
3. 5. SEPIC
5
CP1
CP2A
CP2B
7
CML1 CML2
SEPIC
LDO
IC 6
LDO 300mV
LDO
PSRR
INPUT
LX
POUT
OUT
TRACK
FB
MAX1706
REF LDO OUTPUT
7
MOSFET MOSFET FBLDO
PGND GND
TO-220 MOSFET
6. IC
MOSFET
CP2A
COMMON-MODE MON-MODE FILTER
FULL
AC DC
BRIDGE
LINE OUTPUT
RECTIFIER
CML1 CML2
CP1 CP2B
PWM
CONTROLLER
7.
6
dV/dt
CP2A CP2B
8
/ /
WITHOUT FARADAY WITH FARADAY
SHIELD SHIELD
8.
7
1S
1Ω 1mS 1kΩ
1000 1mS
1000µ 1in2 1µ 1in2
1000:1
9 B X
V t/N N H Y
N i µ
L=V/[di/dt]