UC3842BVD1G ON Semiconductor, UC3842BVD1G Datasheet - Page 14
UC3842BVD1G
Manufacturer Part Number
UC3842BVD1G
Description
IC CTRLR CURRENT MODE HP 8SOIC
Manufacturer
ON Semiconductor
Datasheet
1.UC3842BDR2G.pdf
(21 pages)
Specifications of UC3842BVD1G
Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
275kHz
Duty Cycle
96%
Voltage - Supply
11.5 V ~ 25 V
Buck
No
Boost
Yes
Flyback
Yes
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
-40°C ~ 105°C
Package / Case
8-SOIC (3.9mm Width)
Frequency-max
275kHz
Duty Cycle (max)
96 %
Output Current
1000 mA
Mounting Style
SMD/SMT
Switching Frequency
500 KHz
Maximum Operating Temperature
+ 105 C
Fall Time
50 ns
Minimum Operating Temperature
- 40 C
Rise Time
50 ns
Synchronous Pin
No
Topology
Boost, Flyback, Forward
Number Of Pwm Outputs
1
On/off Pin
No
Adjustable Output
No
Switching Freq
500KHz
Operating Supply Voltage (max)
30V
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
8
Package Type
SOIC N
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
UC3842BVD1GOS
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UC3842BVD1G
Manufacturer:
ON Semiconductor
Quantity:
23
From V
O
R
R
i
d
MPS3904
R
Slope
C
f
C
T
R
8(14)
The buffered oscillator ramp can be resistively summed with either the voltage
feedback or current sense inputs to provide slope compensation.
4(7)
2(3)
1(1)
T
R
Error Amp compensation circuit for stabilizing any current mode topology except for boost and flyback
converters operating with continuous inductor current.
f
C
Figure 32. Error Amplifier Compensation
From V
R
p
Error Amp compensation circuit for stabilizing current mode boost and flyback
topologies operating with continuous inductor current.
p
O
- 3.0m
EA
Figure 33. Slope Compensation
R
R
R
From V
R
i
R
R
d
d
i
R
+
f
≥ 8.8 k
Osc
O
1.0mA
Bias
C
C
http://onsemi.com
f
f
2R
1(1)
1(1)
2(3)
2(3)
R
R
R
f
f
-
+
5(9)
14
1.0V
2.5V
2.5V
-m
5.0V Ref
EA
EA
m
Comp/Latch
+
+
S
R
1.0mA
1.0mA
Q
2R
2R
R
R
+
-
5(9)
5(9)
7(12)
36V
7(11)
6(10)
5(8)
3(5)
V
CC
R
V
S
in