UC2842AD Microsemi Analog Mixed Signal Group, UC2842AD Datasheet - Page 4
![IC PWM CURRENT MODE 14SOIC](/photos/7/53/75378/uc2842ad_sml.jpg)
UC2842AD
Manufacturer Part Number
UC2842AD
Description
IC PWM CURRENT MODE 14SOIC
Manufacturer
Microsemi Analog Mixed Signal Group
Datasheet
1.UC3844AM.pdf
(8 pages)
Specifications of UC2842AD
Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
500kHz
Duty Cycle
100%
Voltage - Supply
11 V ~ 25 V
Buck
Yes
Boost
Yes
Flyback
Yes
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
-40°C ~ 85°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Frequency-max
500kHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
UC2842AD
Manufacturer:
TI
Quantity:
20 000
Company:
Part Number:
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TI
Quantity:
13 178
Part Number:
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Quantity:
20 000
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Part Number:
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Manufacturer:
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Quantity:
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Part Number:
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Manufacturer:
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Quantity:
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Part Number:
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Manufacturer:
TI
Quantity:
14 033
Part Number:
UC2842ADR
Manufacturer:
UC/TI
Quantity:
20 000
Part Number:
UC2842ADTR
Manufacturer:
TI/德州仪器
Quantity:
20 000
UC184xA/284xA/384xA
4
Notes: 2. These parameters, although guaranteed, are not 100% tested in
CURRENT SENSE
Under-Voltage Lockout Section
Start Threshold
Min. Operation Voltage After Turn-On
PWM Section
Maximum Duty Cycle
Minimum Duty Cycle
Total Standby Section
Start-Up Current
Operating Supply Current
Zener Voltage
*** - Toggle flip flop used only in x844A and x845A series.
** - POWER GROUND and GROUND are internally connected for 8 pin packages.
* - V
GROUND
3. Parameter measured at trip point of latch with V
4. Gain defined as: A
5. Adjust V
6. Output frequency equals oscillator frequency for the UC1842A
CC
production.
and UC1843A. Output frequency is one half oscillator frequency
for the UC1844A and UC1845A.
COMP
and V
R
V
Parameter
T
/C
CC
V
**
FB
*
C
T
CC
are internally connected for 8 pin packages.
above the start threshold before setting at 15V.
VOL
8.4V (1843A/5A)
16V (1842A/4A)
34V
=
Oscillator
UVLO
Error Amp
V
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
V
2.5V
ISENSE
COMP
E L E C T R I C A L C H A R A C T E R I S T I C S
Symbol
C
I
; 0
V
CC
U R R E N T
Z
P
0.8V (1843A/5A)
UVLO
6V (1842A/4A)
R O D U C T I O N
V
Hysteresis
x842A/4A
x842A/4A
x843A/5A
x843A/5A
x842A/3A
x844A/5A
I
ISENSE
CC
2R
= 25mA
R
VFB
0.8V.
B L O C K D I A G R A M
M
= 0.
S / R
Good Logic
O D E
Test Conditions
V
1V
REF
Ref
5V
P W M C
D
7. "Temperature stability, sometimes referred to as average temperature
Current Sense
Comparator
***
A T A
coefficient, is described by the equation:
V
voltage measured over the appropriate temperature range. Note that
the extremes in voltage do not necessarily occur at the extremes in
temperature."
REF
(max.) & V
O N T R O L L E R
Temp Stability =
S
R
S
Internal
H E E T
T
Bias
PWM
Latch
REF
(min.) are the maximum & minimum reference
(Con't.)
Min. Typ. Max. Min. Typ. Max.
UC184xA/284xA
7.8
7.0
15
94
47
30
9
V
REF
T
J
8.4
7.6
0.3
16
10
96
48
11
35
(max.) - V
(max.) - T
100
9.0
8.2
0.5
17
11
50
17
0
J
REF
(min.)
14.5
7.8
8.5
7.0
94
47
30
(min.)
UC384xA
8.4
7.6
0.3
16
10
96
48
11
35
V
5.0V
50mA
V
OUTPUT
POWER GROUND
17.5
11.5
100
9.0
8.2
0.5
50
17
REF
C
0
*
Copyright © 1995
Rev. 1.2a 10/25
Units
mA
mA
%
%
%
V
V
V
V
V
**