OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

NCV3843BVDR2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
NCV3843BV
http://onsemi.com
13
Figure 28. MOSFET Parasitic Oscillations
6(10)
5(8)
3(5)
R
S
Q1
V
in
C1
Base Charge
Removal
The totem pole output can furnish negative base current for enhanced
transistor turn-off, with the addition of capacitor C
1
.
S
R
5.0V Ref
Q
7(11)
6(10)
5(8)
3(5)
R
S
Q1
V
CC
I
B
+
-
0
V
in
Isolation
Boundary
V
GS
Waveforms
+
-
0
+
-
0
50% DC 25% DC
I
p
k +
V
(Pin1)
* 1.4
3R
S
ǒ
N
S
N
p
Ǔ
Comp/Latch
7(12)
R
C
N
S
N
P
+
-
+
-
Bias
+
Osc
R
R
R
2R
EA
5(9)
1(1)
2(3)
4(7)
8(14)
The MCR101 SCR must be selected for a holding of < 0.5 mA @ T
A(min)
. The simple two
transistor circuit can be used in place of the SCR as shown. All resistors are 10 k.
MCR
101
2N
3905
2N
3903
1.0 mA
S
R
5.0V Ref
Q
7(11)
6(10)
5(8)
3(5)
R
S
Q1
V
CC
V
in
Series gate resistor R
g
will damp any high frequency parasitic oscillations
caused by the MOSFET input capacitance and any series wiring inductance in
the gate-source circuit.
7(12)
R
g
Comp/Latch
+
-
+
-
Figure 29. Bipolar Transistor Drive
Figure 30. Isolated MOSFET Drive Figure 31. Latched Shutdown
NCV3843BV
http://onsemi.com
14
+
-
+
-
5.0V Ref
36V
S
R
Q
Bias
+
1.0mA
Osc
R
R
R
2R
EA
1.0V
7(12)
7(11)
6(10)
5(8)
3(5)
R
S
V
CC
V
in
1(1)
2(3)
4(7)
8(14)
R
T
C
T
The buffered oscillator ramp can be resistively summed with either the voltage
feedback or current sense inputs to provide slope compensation.
m
- 3.0m
-m
R
f
C
f
R
i
R
d
From V
O
R
Slope
MPS3904
5(9)
Comp/Latch
Figure 32. Error Amplifier Compensation
+
R
2R
1.0mA
EA
2(3)
5(9)
2.5V
1(1)
R
f
C
f
R
d
R
i
From V
O
Error Amp compensation circuit for stabilizing any current mode topology except for boost and flyback
converters operating with continuous inductor current.
R
f
≥ 8.8 k
+
R
2R
1.0mA
EA
2(3)
5(9)
2.5V
1(1)
R
f
C
f
R
d
R
p
From V
O
Error Amp compensation circuit for stabilizing current mode boost and flyback
topologies operating with continuous inductor current.
C
p
R
i
Figure 33. Slope Compensation
NCV3843BV
http://onsemi.com
15
ORDERING INFORMATION
Device Operating Temperature Range Package Shipping
†
NCV3843BVD1R2G
T
A
= −40° to +125°C
SOIC−8
(Pb−Free)
2500 Tape & Reel
NCV3843BVDR2 SOIC−14 2500 Tape & Reel
NCV3843BVDR2G SOIC−14
(Pb−Free)
2500 Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
SOIC−14
D SUFFIX
CASE 751A
SOIC−8
D1 SUFFIX
CASE 751
MARKING DIAGRAMS
A = Assembly Location
WL, L = Wafer Lot
Y = Year
WW, W = Work Week
G or G = Pb−Free Package
UC3843BVDG
AWLYWW
1
14
3843B
ALYW
G
1
8
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

NCV3843BVDR2G

Mfr. #:
Buy NCV3843BVDR2G
Manufacturer:
ON Semiconductor
Description:
Switching Controllers ANA PWM SWTCHING REG
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet