UCC1810 Unitrode Semiconductor, UCC1810 Datasheet - Page 3

• Manufacturer Part Number: UCC1810
• Description: Low Power BiCMOS Dual Current Mode PWM
• Manufacturer: Unitrode Semiconductor

ELECTRICAL
CHARACTERISTICS (cont.)
Note 4: Adjust V
Note 5: Oscillator frequency is twice the output frequency.
Note 6: Current Sense Gain A is defined by:
Note 7: Parameter measured at trip point of latch with FB = 0V.
Note 8: CS Blank Time is measured as the difference between the minimum non-zero on-time and the CS to OUT delay.
Note 9: Start Threshold Voltage and V
Note 10: Guaranteed by design. Not 100% tested in production.
Current Sense Section
PWM Section
Output Section
Undervoltage Lockout Section
Overall Section
Gain
Maximum Input Signal
CS Input Bias Current
CS to OUT Propagation Delay
CS Blank Time
CS Overcurrent Threshold
COMP to CS Offset
Maximum Duty Cycle
Maximum Duty Cycle
Minimum On Time
OUT Low Level
OUT High Level
(V
OUT Rise Time
OUT Fall Time
Start Threshold
Stop Threshold
Start to Stop Hysteresis
ENABLE2 Input Bias Current
ENABLE2 Input Threshold Voltage
Startup Current
Operating Supply Current, Outputs Off V
Operating Supply Current, Outputs On V
Operating Supply Current, Outputs On V
V
V
Start Threshold Voltage
CC
CC
CC
Internal Zener Voltage
Internal Zener Voltage Minus
- OUT)
PARAMETER
CC
above the start threshold before setting at 10V.
Unless otherwise stated, these specifications apply for –55
–40
150k; C
CC
o
C
Internal Zener Voltage track each other.
(Note 6)
(Note 8)
CS = 0V
R
R
I
I
I
I
C
V
COMP = 5V (Note 7)
CS steps from 0V to 1.2V, COMP = 2.5V
CS =1.2V, COMP = 5V
I
C
ENABLE2 = 0V
I
OUT
OUT
OUT
OUT
OUT
CC
T
CC
CC
CC
CC
T
T
OUT
OUT
T
= 120pF; No Load; T
A
= 150k, C
= 30k, C
A
= 10mA (Note 9)
< Start Threshold Voltage
= 10V, FB = 2.75V
= 10V, FB = 0V, CS = 0V, R
= 10V, FB = 0V, CS = 0V, R
= 20mA
= –20mA
= 200mA
= 20mA, V
= –200mA
= 1nF
= 1nF
85
V
o
COMP
V
C for UCC2810; 0
T
CS
T
= 120pF
= 120pF
CC
F
TEST CONDITIONS
OSC
= 0V
0
3
V
A
CS
= T
R
T
J
o
4
0.8 V.
. All parameters are the same for both channels.
C
C
T
T
T
T
= 30k
= 150k
A
70
o
C for UCC3810; V
o
C
T
10.5
MIN
1.30
1.35
0.65
0.80
11.0
–20
7.5
1.7
0.4
A
0.9
46
40
CC
125
= 10V (Note 4); R
o
TYP
1.55
1.55
0.95
0.12
0.48
0.15
1.20
11.8
0.15
12.9
1.53
130
–35
1.0
0.7
8.5
3.2
2.0
3.2
8.5
1.4
C for UCC1810;
55
49
45
20
30
75
MAX UNITS
1.80
0.42
1.10
1.20
0.42
2.10
13.2
14.5
1.75
1.25
2.00
0.25
14.0
–55
9.5
4.7
3.0
5.1
1.1
200
50
48
50
60
UCC1810
UCC2810
UCC3810
T
V/V
mA
mA
mA
mA
nA
ns
ns
ns
ns
=
ns
%
%
V
V
V
V
V
V
V
V
V
V
V
V
V
V
A