UC2845BNG ON Semiconductor, UC2845BNG Datasheet - Page 8
![IC CTLR CURRENT MODE HP 8-DIP](/photos/6/58/65804/8-dip_626-05_sml.jpg)
UC2845BNG
Manufacturer Part Number
UC2845BNG
Description
IC CTLR CURRENT MODE HP 8-DIP
Manufacturer
ON Semiconductor
Datasheet
1.UC3844BDR2G.pdf
(19 pages)
Specifications of UC2845BNG
Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
275kHz
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
-25°C ~ 85°C
Package / Case
8-DIP (0.300", 7.62mm)
Frequency-max
275kHz
Duty Cycle (max)
48 %
Output Current
1000 mA
Mounting Style
Through Hole
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
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UC2845BNG
Manufacturer:
ON Semiconductor
Quantity:
20 000
Part Number:
UC2845BNG
Manufacturer:
ON/安森美
Quantity:
20 000
Capacitor C
Latch “Set"
Input
Output/
Compensation
Current Sense
Input
Latch “Reset"
Input
Output
Compensation
Feedback
T
R
C
Voltage
Output/
Pin numbers adjacent to terminals are for the 8-pin dual-in-line package.
Pin numbers in parenthesis are for the D suffix SOIC-14 package.
T
T
Input
8(14)
V
4(7)
2(3)
1(1)
ref
2.5V
Amplifier
Error
Large R
R
R
Oscillator
+ 1.0mA
T
Internal
/Small C
Bias
Figure 16. Representative Block Diagram
T
2R
GND
R
Figure 17. Timing Diagram
5(9)
3.6V
http://onsemi.com
1.0V
Current Sense
Reference
Comparator
Regulator
-
+
8
UVLO
V
ref
R
S
T
UVLO
V
Q
CC
PWM
Latch
V
CC
+
-
7(12)
(See
Text)
36V
= Sink Only Positive True Logic
V
7(11)
Output
6(10)
Power Ground
5(8)
Current Sense Input
3(5)
Small R
C
V
CC
T
/Large C
T
V
in
Q1
R
S