NCP1381 ONSEMI [ON Semiconductor], NCP1381 Datasheet - Page 3

• Manufacturer Part Number: NCP1381
• Description: Low−Standby High Performance PWM Controller
• Manufacturer: ONSEMI [ON Semiconductor]

ADJ_GTS
Timer
DMG
Skip/
OVP
BO
CS
FB
1
2
3
4
5
6
7
ADJ_GTS Section
V
DD
250 mV
DRV
V
latchDem
CLK
+
30 mA
V
S
R
+
DD
/ 4
25 k
Q
Q
+
−
+
V
LEB
DD
+
+
−
−
+
t
Fault
ON
V
8 ms No DMG
+
latch
Timeout
> 45 ms?
Offset
OPP
INTERNAL CIRCUIT ARCHITECTURE
+
SS
Figure 2. Internal Circuit Architecture
Latchoff
I
+
−
BOComp.
240 mV/
500 mV
Delayed
PFlag
1 Shot
1 Shot
shot
4 ms
DRV
+
−
−
+
I/V 85 mS
Skip
Section
V
th
−
+
to
Latch
5 mA
V
R
Timer
DD
ST
http://onsemi.com
V
Sensing
Plateau
t
Max F
Clamping
DD
ON
DRV
+
Skip
Fault /
Startup
V
NCP1381
+ t
DD
+
sw
OFF
+
−
4 V Reset
=8 ms
3
R
S
1 Shot
3 ms
Q
Q
+
−
Prioritary
Reset
Switches are Kept Closed until NOR
CLK
I
P
R
S
GTS
Flag
Soft−Start Ended
Timer
Q
Q
Output Goes Low
Soft−Start
Soft−Skip
V
UVLO, Latchoff
CC
Flag
I
Management
P
Timer
DRV
+
−
+
−
BO
SS
Cap
V
V
+
+
TimFault
TimSS
SS
Cap
V
V
Conf. ?
DD
DD
UVLO
GTS
V
BO
Timer
ref
+
12
11
10
9
8
V
Ref
GTS
Drv
GND
CC