UC3845DR2G ON Semiconductor, UC3845DR2G Datasheet - Page 8
![IC CTRLR CURRENT MODE HP 14SOIC](/photos/6/57/65767/14-soic_751a_sml.jpg)
UC3845DR2G
Manufacturer Part Number
UC3845DR2G
Description
IC CTRLR CURRENT MODE HP 14SOIC
Manufacturer
ON Semiconductor
Type
High Performance Current Mode Controllersr
Datasheet
1.UC3845DR2.pdf
(16 pages)
Specifications of UC3845DR2G
Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
60kHz
Duty Cycle
50%
Voltage - Supply
8.2 V ~ 25 V
Buck
No
Boost
Yes
Flyback
Yes
Inverting
Yes
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
0°C ~ 70°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Frequency-max
60kHz
Output Voltage Range
4.9 V to 5.1 V
Input Voltage Range
30 V
Operating Temperature Range
0 C to + 70 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
UC3845DR2GOS
Current Sense
Compensation
‘‘Reset’’ Input
Voltage Feedback
Input
Capacitor C
Output/
Input
‘‘Set’’ Input
Latch
Output
Compensation
Latch
Output
C
R
T
T
T
V
ref
8(14)
4(7)
2(3)
1(1)
Pin numbers in parenthesis are for the D suffix SOIC−14 package.
2.5V
Amplifier
+
−
Error
Large R
R
R
+
Oscillator
T
1.0mA
/Small C
Internal
Bias
Figure 16. Representative Block Diagram
T
2R
GND
Figure 17. Timing Diagram
R
5(9)
http://onsemi.com
3.6V
1.0V
Current Sense
Comparator
Reference
Regulator
+
−
8
−
+
+
−
UVLO
V
ref
S
R
T
UVLO
V
Q
Q
CC
PWM
Latch
+
−
V
CC
−
+
−
+
=
7(12)
Sink Only
Positive True Logic
36V
Small R
Output
Current Sense Input
V
Power Ground
3(5)
7(11)
6(10)
5(8)
C
T
/Large C
V
CC
T
V
in
Q1
R
S