NX2142A MICROSEMI [Microsemi Corporation], NX2142A Datasheet - Page 5
NX2142A
Manufacturer Part Number
NX2142A
Description
SINGLE CHANNEL PWM CONTROLLER WITH FEEDFORWARD AND 5V BIAS REGULATOR
Manufacturer
MICROSEMI [Microsemi Corporation]
Datasheet
1.NX2142A.pdf
(18 pages)
- Current page: 5 of 18
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BLOCK DIAGRAM
Rev. 1.1
10/28/07
COMP
GND
VCC
FB
VIN
6V/
5.5V
START
Generator
COMP
Digital
start Up
0.3V
Bias
4.4/4.2V
0.8V
START
Figure 2 - Simplified block diagram of the NX2142
ramp
1.25V
0.8V
OSC
VIN
0.6V
CLAMP
Ref
UVLO
1.3V
CLAMP
S
R
Q
POR
OC
START
POR
Hiccup Logic
PWM
OC
OCP
comparator
SS_half_done
Control
Logic
NX2142/2142A
VCC
70%*Vp
320mV
FB
Regout
HDRV
SW
LDRV
BST
5
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