nx2155h Microsemi Corporation, nx2155h Datasheet - Page 6

• Manufacturer Part Number: nx2155h
• Description: Single Power Supply Synchronous Pwm Controller
• Manufacturer: Microsemi Corporation

Demoboard Design(VIN=12V, VOUT= 5V/2A, FREUQNCY=2.2MHz)
* R7 and C7 are optional.
Rev.1.1
04/16/09
BUS
R1
4.22k
C2
4.7u
5
7
VCC
RT
U1
HDRV
COMP
LDRV
C1
0.1u
OCP
BST
SW
FB
3
2
1
10
4
9
8
6k
Figure 3 - Simplified demoboard schematic of NX2155H
R2
C3
0.1u
R8
0
R6
15k
C5
1n
LDRV
HDRV
C6
10p
10uF,16V
CIN2
3
1
0.1uF
M1B
AO6800
M1A
AO6800
CIN1
SW
R7
10
C7
470p
BRL3225T1R0M
sdfd
L1
GND
COUT1
10uF,16V
COUT2
10uF,16V
OUT
R3
300
C4
180p
R4
49.9k
R5
9.53k
NX2155H
VOUT
GND
6