UCC25702PW

Frequency - Switching:	100kHz
Base Part Number:	UCC25702
Supplier Device Package:	14-TSSOP
Package / Case:	14-TSSOP (0.173", 4.40mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Current Limit, Frequency Control, Sequencing, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	No
Duty Cycle (Max):	99%
Series:	--
Voltage - Supply (Vcc/Vdd):	8.8 V ~ 15 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Flyback, Forward Converter
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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UCC25702PW is a switching controller integrated circuit optimized for offline and dc-to-dc voltage conversion applications. The device offers improved system performance, including higher efficiency and faster power supply output voltage transient response. It is an ideal cost-effective solution for medium to low power, offline and isolated power supply designs.The UCC25702 is a single-phase PWM controller with cycle-by-cycle current limit, optimized for an all-N-Channel MOSFET design. The UCC25702 utilizes an input voltage range of 4.7V to 24V and is suitable for a range of isolated and non-isolated power supply topologies. The device has an internal ramp generator for easy selection of the switching frequency up to 250 kHz.The controller supports a full set of functions requires for offline, dc-to-dc conversion, including an under-voltage lockout (UVLO), an over-voltage lockout (OVLO), and a cycle-by-cycle peak current limit. The controller can provide an adjustable current limit for maximum system efficiency. The device also supports a wide input voltage range, allowing it to be used in offline converters without the need for an additional boost diode.The UCC25702 also features an advanced protection features to protect the converter circuit from over-temperature, over-current/short-circuits, and overload conditions. The built-in soft-start capability provides a gradual rise time of output voltage. The device is also optimized for low standby-power operation and system performance on stand-by mode.The UCC25702PW operates in a current mode-controlled basis with a single pulse-width modulation (PWM) output, providing fast transient response. Its output is a symmetrical PWM signal with a adjustable duty cycle for either voltage or current mode control. The frequency can be synced to an external clock or use an internal free-running oscillator.The UCC25702 has a comprehensive fault protection package that allows the designer to protect the power section from damage due to overload, short-circuit, under-current or even temperature. In addition, the open and short circuit detection allows detection of welding on the wirings, making it a valuable addition in industrial applications. The UCC25702 can also be configured for a variety of applications using an intuitive programming GUI.The device also features an optional sync output that can be used to synchronize system performance. This output can be used to trim clocks and bias of other system elements. The sync output pin can also be used as an external soft-start pin, allowing the system to be started without any nasty overshoots or oscillations.Overall, the UCC25702PW is a highly efficient, low cost, and highly capable switching controller ideally suited for a wide range of offline and dc-to-dc voltage conversion applications. The device\'s system performance has been further optimized with the addition of advanced protection features, integrated error flags and fault protection, and a wide range of configurability via an intuitive GUI. These features make the UCC25702PW an ideal solution for all your offline and dc-to-dc voltage conversion requirements.

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