1 Features

1• Programmable Output Turnon Delay

• Adaptive Delay Set

• Bidirectional Oscillator Synchronization

• Capability for Voltage-Mode or Current-Mode

Control

• Programmable Soft Start/Soft Stop and Chip

Disable Via a Single Pin

• 0% to 100% Duty-Cycle Control

• 7-MHz Error Amplifier

• Operation to 1 MHz

• Low-Active Current Consumption (5-mA Typ at

500 kHz)

• Very-Low-Current Consumption During

Undervoltage Lockout (150-μA Typ)

• Supports Defense, Aerospace, and Medical

Applications:

– Controlled Baseline

– One Assembly/Test Site

– One Fabrication Site

– Available in Military (–55°C to 125°C)

Temperature Range

– Extended Product Life Cycle

– Extended Product-Change Notification

– Product Traceability

2 Description

The UCC2895-EP is a phase-shift pulse-width

modulation (PWM) controller that implements control

of a full-bridge power stage by phase shifting the

switching of one half bridge with respect to the other.

It allows constant frequency PWM in conjunction with

resonant zero-voltage switching to provide high

efficiency at high frequencies. The device can be

used either as a voltage-mode or current-mode

controller.

While the UCC2895-EP maintains the functionality of

the UC2875/6/7/8 family, it improves on that controller

family with additional features, such as enhanced

control logic, adaptive delay set, and shutdown

capability. Since the device is built in BCDMOS, it

operates with dramatically less supply current than its

bipolar counterparts. The UCC2895-EP can operate

with a maximum clock frequency of 1 MHz.

The M-temp UCC2895-EP device is offered in the 20-

pin SOIC (DW) package.