Datasheet

3
UNITRODE CORPORATION
7 CONTINENTAL BLVD. • MERRIMACK, NH 03054
TEL. [phone] • FAX [phone]
UC3770A UC3770B
PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Turn Off Delay 22ms
Sink Driver Saturation Voltage I
M = 1.0A 0.8 0.8 V
I
M = 1.3A 1.3 1.3 V
Source Driver Saturation Voltage I
M = 1.0A 1.3 1.3 V
I
M = 1.3A 1.6 1.6 V
Output Leakage Current V
M = 45V 100 100 µA
UC3770A
UC3770B
ELECTRICAL CHARACTERISTICS (cont.): (All tests apply with VM = 36V, VCC = 5V, VR = 5V, No Load, and 0°C<TA<70°C,
unless otherwise stated, T
A =TJ.)
0
1
2
3
4
5
00.511.52
OUTPUT CURRENT (A)
POWER DISSIPATION (W)
Figure 4. Typical power dissipation vs. output
current.
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
0.2
2.5
3.0
3.5
4.0
4.5
5.0
T
A
=+25°C
OUTPUT CURRENT – A
I
CC
– mA
Figure 3. Typical supply current vs. load current.
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
0.6
0.8
1.0
1.2
1.4
1.6
1.8
T
A
=+25°C
OUTPUT CURRENT – A
V
CE
SAT HIGH – V
Figure 1. Typical source saturation voltages vs. load
current
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
T
A
=+25°C
OUTPUT CURRENT – A
V
CE
SAT LOW – V
Figure 2. Typical sink saturation voltages vs. load
current