nx2113 Microsemi Corporation, nx2113 Datasheet - Page 18

• Manufacturer Part Number: nx2113
• Description: 300khz & 600khz Synchronous Pwm Controller With Programmable Bus Uvlo
• Manufacturer: Microsemi Corporation

TYPICAL APPLICATION
Dual power supply (+5V BIAS,+12V BUS)
Single power supply (+11V to +24V BUS)
Rev. 2.0
11/18/05
+12V
+11~25V
Vin
+5V
Vin
Vin
1k
47uF
1k
C4
R6
R5
100pF
47uF
C4
TL431
C1
100pF
Figure 18 -Application of NX2113 for 5V bias and 12V input bus
C1
Figure 19 -Application of NX2113 for high input bus application
2N3904
4.7k 1%
3k
R5
1uF
12.7k
C5
10k
10k
10nF
R7
R5
10
C2
R2
R6
R4
4.7k 1%
10k
10nF
C2
R4
R2
9
8
7
10k
R9
R8
76.8k
Comp
EN
Fb
1uF
Vcc
C6
6
9
8
7
R5
10
PGnd/Gnd
1uF
C8
Comp
EN
Fb
Vcc
PVcc
3
PGnd
5
3
6
R1
C6
1uF
PVcc
10k 1%
BST
1
Hdrv
L2 1uH
Ldrv
Gnd
R1
SW
11
5
10k 1%
D1
BST
Hdrv
Ldrv
SW
2
10
4
1
D1
2
10
4
L2 1uH
C7
0.1uF
0.1uF
C7
M1
M2
C5
1uF
L1 4.7uH
M1
M2
C5
1uF
L1 4.7uH
39uF,31mohm
NX2113/2113A
Cin
Co
2 x (680uF,36mohm)
2 x (47uF,60mohm)
Cin
2 x (680uF,36mohm)
Co
Vout
+2.5V,4A
Vout
+1.6V,5A
18