UC1846/7
UC2846/7
UC3846/7
(Unless otherwise stated, these specifications apply for T
A
=-55°C to +125°C for UC1846/7;
ELECTRICAL
-40°C to +85°C for the UC2846/7; and 0°C to +70°C for the UC3846/7; V
IN
=15V, R
T
=10k,
CHARACTERISTICS (cont.)
C
T
=4.7nF, T
A
=T
J
.)
UC1846/UC1847
PARAMETER
Shutdown Terminal Section (cont.)
Maximum Non-Latching
Current (I
PIN 1
)
Delay to Outputs
Output Section
Collector-Emitter Voltage
Collector Leakage Current
Output Low Level
Output High Level
Rise Time
Fall Time
Start-Up Threshold
Threshold Hysteresis
Total Standby Current
Supply Current
17
21
17
21
mA
Note 2. These parameters, although guaranteed over the recommended operating conditions, are not 100% tested in production.
Note 3. Parameter measured at trip point of latch with VPIN 5 = VREF, VPIN 6 = 0V.
∆
V
PIN
7
Note 4. Amplifier gain defined as: G
=
;
V
PIN4
= 0 to 1.0V
∆
V
PIN
4
Note 5. Applies to UC1846/UC2846/UC3846 only due to polarity of outputs.
Note 6. Current into Pin 1 guaranteed to latch circuit in shutdown state.
Note 7. Current into Pin 1 guaranteed not to latch circuit in shutdown state.
V
C
=40V (Note 5)
I
SINK
=20mA
I
SINK
=100mA
I
SOURCE
=20mA
I
SOURCE
=100mA
C
L
=1nF, T
J
=25°C (Note 2)
C
L
=1nF, T
J
=25°C (Note 2)
13
12
0.1
0.4
13.5
13.5
50
50
7.7
0.75
300
300
8.0
40
200
0.4
2.1
13
12
0.1
0.4
13.5
13.5
50
50
7.7
0.75
300
300
8.0
40
200
0.4
2.1
V
µA
V
V
V
V
ns
ns
V
V
T
J
=25°C (Note 2)
(Note 7)
1.5
300
0.8
600
1.5
300
0.8
600
mA
ns
TEST CONDITIONS
UC2846/UC2847
MIN.
TYP.
MAX.
UC3846/UC3847
MIN.
TYP.
MAX. UNITS
Under-Voltage Lockout Section
APPLICATIONS DATA
Oscillator Circuit
ID
.
Output deadtime is determined by the external capacitor, C
T
, according to the formula:
τ
d
(
µ
s
)
=
145CT
(
µ
f
)
3.6
ID - RT (k
Ω
)
I
D
= Oscillator discharge current at 25°C is typically 7.5.
For large values of R
T
:
τ
d
(
µ
s
)
≈
145CT
(
µ
f
)
.
2.2
Oscillator frequency is approximated by the formula: fT
(
kHz
)
≈
.
RT
(
k
Ω
)
•
CT
(
µ
f
)
4
TI [ TEXAS INSTRUMENTS ]
