UC2845D ON Semiconductor, UC2845D Datasheet - Page 4
![Other Power Management 52kHz 1A Current PWM](/photos/16/10/161082/soic-14_sml.jpg)
UC2845D
Manufacturer Part Number
UC2845D
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 UC2845D
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
SMD/SMT
Package / Case
SOIC-14
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UC2845D
Manufacturer:
MOTOROLA
Quantity:
15
Part Number:
UC2845D
Manufacturer:
TI/德州仪器
Quantity:
20 000
Part Number:
UC2845D8
Manufacturer:
UC/TI
Quantity:
20 000
Part Number:
UC2845DR
Manufacturer:
UC/TI
Quantity:
20 000
Part Number:
UC2845DR2G
Manufacturer:
ON/安森美
Quantity:
20 000
Company:
Part Number:
UC2845DTR
Manufacturer:
ROCKWELL
Quantity:
6 218
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