UC3844N
The UCx84x series of control integrated circuits
provide the features that are necessary to implement
off-line or DC-to-DC fixed-frequency current-mode
control schemes, with a minimum number of external
components. The internally implemented circuits
include an undervoltage lockout (UVLO), featuring a
start-up current of less than 1 mA, and a precision
reference trimmed for accuracy at the error amplifier
input. Other internal circuits include logic to ensure
latched operation, a pulse-width modulation (PWM)
comparator that also provides current-limit control,
and a totem-pole output stage that is designed to
source or sink high-peak current. The output stage,
suitable for driving N-channel MOSFETs, is low when
it is in the off state.
UCC28064ADR
Features of UCC28064ADR
? Reduction of ripple current through input filters and output capacitors
- A smaller bulk capacitor and less current ripple for improved system reliability
- Smaller EMI filters
? High efficiency for light loads
- User-adjustable input voltage correction and phase management
- Operation in burst mode with a programmable burst threshold
- Facilitates adherence to DOE Level VI, CoC Tier II, and EUP Lot 6 Tier II standards.
? Sensor-less current-shaping streamlines board design and boosts productivity.
? Fast line transient response input line feed-forward
? Safe current limitation during inrush:
- Prevents inrush MOSFET conduction
- Removes reverse recovery events and CCM activity from the output rectifier
? A 16-pin SOIC package with an operating temperature range of -40?C to +125?C.
Applications? of UCC28064ADR
? LED and U-HD televisions
? Desktop computer
? Playing
? Plug-ins
? Home audio equipment
UCC2813D-2
The UCC3813-x device family of high-speed, lowpower integrated circuits contains all of the control
and drive components required for off-line and DC-toDC fixed-frequency current-mode switching power
supplies with minimal parts count.
These devices have the same pin configuration as
the UC384x device family, and also offer the added
features of internal full-cycle soft start and internal
leading-edge blanking of the current-sense input.
The UCC3813-x device family offers a variety of
package options, temperature-range options, choice
of maximum duty cycle, and choice of critical voltage
levels. Devices with lower reference voltage such as
the UCC3813-3 and UCC3813-5 fit best into battery
operated systems, while the higher reference and the
higher UVLO hysteresis of the UCC3813-2 device
and UCC3813-4 device make these ideal choices for
use in off-line power supplies.
UCC3750DW
The UCC3750 Source Ringer Controller provides a complete control and
drive solution for a four quadrant flyback-based ring generator circuit. The
IC controls a primary side switch, which is modulated when power transfer
is taking place from input to output. It also controls two secondary
switches which act as synchronous rectifier switches during positive
power flow. These switches are pulse-width-modulated when the power is
being delivered back to the source
UCC3800N
The UCC280x family of high-speed, low-power
integrated circuits contain all of the control and drive
components required for off-line and DC-to-DC fixed
frequency current-mode switching mode power
supplies with minimal parts count.
These devices have the same pin configuration as the
UCx84x family, and also offer the added features of
internal full-cycle soft start and internal leading-edge
blanking of the current-sense input.
