UC384XA - UC284XA
Table 2. Absolute Maximum Ratings
Symbol
V
i
V
i
I
O
E
O
Supply Voltage (Ii < 30mA)
Output Current
Output Energy (capacitive load)
Analog Inputs (pins 2, 3)
Error Amplifier Output Sink Current
P
tot
P
tot
T
stg
T
J
T
L
Power Dissipation at T
amb
≤
25 °C (DIP-8)
Power Dissipation at T
amb
≤
25
°C
(SO-8)
Storage Temperature Range
Junction Operating Temperature
Lead Temperature (soldering 10s)
Parameter
Supply Voltage (low impedance source)
Value
30
Self Limiting
±1
5
– 0.3 to 5.5
10
1.25
800
– 65 to 150
– 40 to 150
300
A
µJ
V
mA
W
mW
°C
°C
°C
Unit
V
* All voltages are with respect to pin 5, all currents are positive into the specified terminal.
Figure 3. DIP-8/SO-8 Pin Connection
(Top view)
COMP
V
FB
I
SENSE
R
T
/C
T
1
2
3
4
D95IN332
8
7
6
5
V
REF
Vi
OUTPUT
GROUND
Table 3. Pin Description
N°
1
2
3
4
5
6
7
8
Pin
COMP
V
FB
I
SENSE
R
T
/C
T
GROUND
OUTPUT
V
CC
V
ref
Function
This pin is the Error Amplifier output and is made available for loop compensation.
This is the inverting input of the Error Amplifier. It is normally connected to the switching power
supply output through a resistor divider.
A voltage proportional to inductor current is connected to this input. The PWM uses this
information to terminate the output switch conduction.
The oscillator frequency and maximum Output duty cycle are programmed by connecting
resistor R
T
to V
ref
and cpacitor C
T
to ground. Operation to 500kHz is possible.
This pin is the combined control circuitry and power ground.
This output directly drives the gate of a power MOSFET. Peak currents up to 1A are sourced
and sunk by this pin.
This pin is the positive supply of the control IC.
This is the reference output. It provides charging current for capacitor C
T
through resistor R
T
.
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