nx2141 Microsemi Corporation, nx2141 Datasheet - Page 5

• Manufacturer Part Number: nx2141
• Description: Single Channel Mobile Pwm Controller With Feedforward And Enable
• Manufacturer: Microsemi Corporation

BLOCK DIAGRAM
Rev. 1.6
05/15/07
COMP
AGND
VCC
FB
EN
VIN
6V/
5.5V
START
Generator
COMP
Digital
start Up
0.3V
Bias
0.8V
DISABLE
START
Figure 2 - Simplified block diagram of the NX2141(MLPQ)
ramp
1.25V
0.8V
OSC
VIN
0.6V
CLAMP
UVLO
1.3V
CLAMP
S
R
Q
POR
OC
DISABLE
START
POR
Hiccup Logic
PWM
OC
OCP
comparator
Control
Logic
SS_half_done
0.85Vref
/0.90Vref
FB
70%*Vp
320mV
FB
NX2141
HDRV
SW
PVCC
LDRV
PGND
BST
PGOOD
5