nx2158 Microsemi Corporation, nx2158 Datasheet - Page 5

• Manufacturer Part Number: nx2158
• Description: Pwm Boost Controller
• Manufacturer: Microsemi Corporation

BLOCK DIAGRAM
Rev.1.2
12/30/09
ENBUS
COMP
GND
VCC
RT
FB
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
START
Generator
Digital
start Up
Bias
0.8V
COMP
0.3V
START
Figure 2 - Simplified block diagram of the NX2158
ramp
1.25V
0.8V
OSC
1.2V
0.6V
CLAMP
UVLO
Analog Mixed Signal Group
1.3V
CLAMP
Microsemi
S
R
Q
POR
OC
OVP
START
START
Thermal
Shutdown
SS_finished
Latch
LDRV
PWM
Driver
Logic
VCC
VCC
NX2158
LDRV
HDRV
SW
BST
OCP
5