UCC1883 Unitrode Semiconductor, UCC1883 Datasheet - Page 2

• Manufacturer Part Number: UCC1883
• Description: Micropower Peak Current Mode Controller
• Manufacturer: Unitrode Semiconductor

ABSOLUTE MAXIMUM RATINGS
Note 1: All voltages expressed with respect to VSS, currents
Note 2: All maximum signal pin voltage limits apply for cases
Note 3: Consult Packaging Section of Databook for thermal
Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5
Maximum VCC Slew Rate . . . . . . . . . . . . . . . . . . . . . . . 10V/ms
Maximum Voltage:
RBIAS, CSTART, VLINE
IMODE, FB+, FB-, OUT, VREG . . . . . . . . . VCC + 0.3V to 18V
VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
COL, ISENSE, CT . . . . . . . . . . . . . . . . . . . . VDD + 0.3V to 7V
VLIMIT, IIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3V
Minimum Voltage:
VLIMIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum DC Current, Any Pin, Source or Sink . . . . . . 100mA
Maximum Peak Current, Any Pin, Source or Sink . . . . . 500mA
Storage Temperature . . . . . . . . . . . . . . . . . . . . 65°C to+150°C
Junction Temperature. . . . . . . . . . . . . . . . . . . . 55°C to+150°C
Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300 C
Pin No. Pin Name
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
are positive into the specified terminal.
of zero source impedance. Higher or lower voltages
may be impressed through a finite source impedance
which causes the input current to be limited to the val-
ues specified with total package power dissipation at
or below specified limits.
limitations and considerations of package.
RBIAS
CSTART
VLINE
IMODE
VDD
FB+
FB-
VCC
OUT
VSS
ISENSE
COL
CT
VLIMIT
IIN
VREG
Analog Program
Analog Input
Analog Input
Analog Output
Digital I/O
Digital I/O
Power Supply
Digital Output
Power Supply
Analog Input
Analog Program
Analog Program
Analog Output
Analog Program
Analog Output
Analog Program
Pin Type
Timing Set
Input Line Polarity Sense
5V Logic Regulator
Communication Signal (+)
Communication Signal (-)
Positive Power Supply Input
UCC1883 Ground Reference
Primary Current Sense
Output Overload Timing Set
Voltage
Voltage
Quiescent Bias Current Set
Soft Start and Restart Delay
Input Line Voltage Sense
Differential Feedback
Differential Feedback
Power Switch Control Voltage
Oscillator Frequency Set
Input Current Limit Control
Input Current Limit Set
9.5V Pre-regulator Control
Function
0.3V
2
DESCRIPTION (cont.)
ISDN-specific features allow the UCC1883/UCC1885
combination to be compatible with CITT Recommenda-
tion I.430. The linear pre-regulator is intended to control
a depletion-mode NMOS pass transistor, such as
BSS129. Startup power drawn from the line can be re-
duced to zero if a bootstrap winding provides power to
the UCC1883 VCC pin. An internal current comparator is
provided to sense restricted mode directly from the input
to the converter. Maximum input current may be accu-
rately programmed and continuously limited with the use
of an external PMOS pass transistor. Precision program-
ming of the quiescent current used by the UCC1883 al-
lows the system to meet the 25mW restricted mode
power limit, or the current can be set to achieve higher
operating frequencies at the cost of increased power
consumption.
The UCC1883 is fabricated in Unitrode’s 3 M BiCMOS
process. Even though the device contains internal clamp-
ing diodes on all pins, the part should still be considered
static sensitive. Normal ESD handling procedures for
CMOS devices should be observed when using the
UCC1883.
CONNECTION DIAGRAM
DIL-16
(Top View)
J or N Package
UCC1883
UCC2883
UCC3883