Table of Contents
Advertisement
EN 116
9.
PB52.1HU LB
9.4.8
Diagram DC, UC3843BD (IC U801)
Block Diagram
GROUND
RT/CT
VFB
COMP
CURRENT
SENSE
Pin Configuration
Circuit Descriptions, Abbreviation List, and IC Data Sheets
7
Vi
UVLO
34V
5
2.50V
4
OSC
ERROR AMP.
2R
+
2
-
1
3
COMP
V
FB
I
SENSE
R
/C
T
T
Figure 9-11 Internal block diagram and pin configuration
5V
S/R
REF
INTERNAL
BIAS
VREF GOOD
LOGIC
T
S
R
R
1V
CURRENT
SENSE
COMPARATOR
Minidip/SO8
1
8
V
2
7
Vi
3
6
OUTPUT
4
5
GROUND
D95IN332
8
VREF
5V 50mA
6
OUTPUT
P
W
M
LATCH
UC3842A
D95IN331
REF
I_18040_004.eps
250908
Advertisement
Table of Contents
