UC2842BDR2G ON Semiconductor, UC2842BDR2G Datasheet - Page 14
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UC2842BDR2G
Manufacturer Part Number
UC2842BDR2G
Description
IC CTRLR CURRENT MODE HP 14-SOIC
Manufacturer
ON Semiconductor
Datasheet
1.UC3842BDR2G.pdf
(21 pages)
Specifications of UC2842BDR2G
Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
275kHz
Duty Cycle
96%
Voltage - Supply
11 V ~ 25 V
Buck
No
Boost
Yes
Flyback
Yes
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
-25°C ~ 85°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Frequency-max
275kHz
Duty Cycle (max)
96 %
Output Current
1000 mA
Mounting Style
SMD/SMT
Switching Frequency
500 KHz
Maximum Operating Temperature
+ 85 C
Fall Time
50 ns
Minimum Operating Temperature
- 25 C
Rise Time
50 ns
Synchronous Pin
No
Topology
Boost, Flyback, Forward
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UC2842BDR2G
Manufacturer:
ON
Quantity:
21 500
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