UC2844N ON Semiconductor, UC2844N Datasheet - Page 4
UC2844N
Manufacturer Part Number
UC2844N
Description
Other Power Management 52kHz 1A Current PWM
Manufacturer
ON Semiconductor
Type
High Performance Current Mode Controllersr
Datasheet
1.UC2845DR2.pdf
(16 pages)
Specifications of UC2844N
Output Voltage Range
4.95 V to 5.05 V
Input Voltage Range
30 V
Operating Temperature Range
- 25 C to + 85 C
Mounting Style
Through Hole
Package / Case
PDIP-8
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UC2844N
Manufacturer:
MOTOROLA
Quantity:
132
Company:
Part Number:
UC2844N
Manufacturer:
MOT
Quantity:
2 860
Part Number:
UC2844N
Manufacturer:
UC
Quantity:
20 000
2.55 V
2.45 V
2.5 V
− 20
100
5.0
2.0
1.0
80
60
40
20
10
50
20
10
0
0
10
10 k
NOTE: Output switches
at one−half the oscillator
frequency.
Figure 6. Error Amp Open Loop Gain and
20 k
100
Figure 4. Error Amp Small Signal
Figure 2. Timing Resistor versus
f
Phase versus Frequency
osc
, OSCILLATOR FREQUENCY (Hz)
Oscillator Frequency
Transient Response
1.0 k
Gain
50 k
f, FREQUENCY (Hz)
0.5 ms/DIV
10 k
100 k
200 k
100 k
V
V
R
T
A
CC
O
L
= 25°C
= 100 K
= 2.0 V to 4.0 V
= 15 V
V
A
T
V
A
CC
V
T
1.0 M
Phase
A
500 k
CC
= −1.0
= 25°C
= 25°C
= 15 V
= 15 V
http://onsemi.com
1.0 M
10 M
0
30
60
90
120
150
180
4
3.0 V
2.5 V
2.0 V
70
65
60
55
50
75
1.2
1.0
0.8
0.6
0.4
0.2
10 k
0
0
V
CC
Figure 7. Current Sense Input Threshold
20 k
Figure 5. Error Amp Large Signal
Figure 3. Output Deadtime versus
= 15 V
versus Error Amp Output Voltage
T
A
f
V
osc
= 125°C
T
O
2.0
A
, ERROR AMP OUTPUT VOLTAGE (V)
, OSCILLATOR FREQUENCY (Hz)
Oscillator Frequency
Transient Response
= 25°C
C
T
50 k
= 10 nF
1.0 ms/DIV
T
100 k
A
= −55°C
4.0
5.0 nF
200 k
500
pF
6.0
2.0 nF
V
A
T
V
A
CC
500 k
= −1.0
= 25°C
200
pF
= 15 V
1.0 nF
100
pF
1.0 M
8.0