UC3844-D08-T UTC [Unisonic Technologies], UC3844-D08-T Datasheet - Page 5

• Manufacturer Part Number: UC3844-D08-T
• Description: HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
• Manufacturer: UTC [Unisonic Technologies]

UC3844/45
CURRENT SENSE SECTION
Current Sense Input Voltage Gain
(Note 2 & 3)
Maximum Current Sense Input
Threshold (Note 2)
Input Bias Current
Power Supply Rejection Ratio
Propagation Delay
OUTPUT SECTION
Output Voltage
Output Voltage with U
Output Voltage Rise Time
Output Voltage Fall Time
UNDERVOLTAGE LOCKOUT SECTION
Startup Threshold
Minimum Operating
Voltage After Turn-On
PWM SECTION
Duty Cycle
TOTAL DEVICE
Power Supply Zener Voltage
Power Supply Current
(Note 4)
Note: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient
ELECTRICAL CHARACTERISTICS(Cont.)
2. This parameter is measured at the latch trip point with V
3. Comparator gain is defined as:
4. Adjust V
as possible.
PARAMETER
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
CC
above the startup threshold before setting to 15V.
VLO
Activated
UC3844
UC3845
UC3844
UC3845
UC3845
UC3844
High
Low
Max
Min
A
SYMBOL
t
V
PLH(IN/OUT)
V
V
OL
DC
V
PSRR
DC
I
=
V
CC(MIN)
I(BIAS)
V
V
I(THR)
G
(U
I
V
t
t
THR
CC
OH
OL
R
F
MAX
ΔV Output Compensation
MIN
V
Z
ΔV Current Sense Input
VLO
)
V
I
I
I
I
V
C
C
I
V
V
SINK
SINK
SINK
SINK
CC
CC
CC
CC
CC
L
L
=1.0nF,T
=1.0nF,T
=25mA
=12V ~ 25V (Note4)
=6.0V, I
=6.5V
=14V
=20mA
=200mA
=20mA
=200mA
TEST CONDITIONS
SINK
J
J
FB
=25°C
=25°C
=0V.
=1.0mA
LINEAR INTEGRATED CIRCUIT
2.85
14.5
MIN
0.9
7.8
8.5
7.0
13
12
47
30
TYP
13.5
13.4
16.0
10.0
-2.0
150
3.0
1.0
0.1
1.6
0.1
8.4
7.6
0.5
70
50
50
48
36
12
MAX
3.15
17.5
11.5
300
150
150
-10
1.1
0.4
2.2
1.1
9.0
8.2
1.0
50
17
0
-
QW-R103-010,C
UNIT
5 of 7
V/V
mA
μA
dB
ns
ns
ns
%
%
V
V
V
V
V
V
V