UCC3806

Features:

• BiCMOS Version of UC1846 Families
• 1.4mA Maximum Operating Current
• 100A Maximum Startup Current
• 1.0A Peak Output Current
• 125nsec Circuit Delay
• Easier Parallelability
• Improved Benefits of Current Mode Control


Pinout




Specifications

Supply Voltage, Low Impedance (Pin 15) . . . . . . . . .  .  . . +15V
Supply Current, High Impedance (Pin 15) . . . . . .  . . . . . +25mA
Output Supply Voltage (Pin 13) . . . . . . . . . . . . . . . .  . . . . +18V
Output Current, Continuous Source or Sink . . . . . .. . . ±200mA
Output Current, Gate Drive. . . . . . . . . . . . . . . . . .. . . . ±500mA
Analog Input Voltage (Pin 3, 4, 5, 6, 16) . . -0.3V to +VIN +0.3V
Sync Output Current (Pin 10) . . . . . . . . . . . . . . . . . . . . ±30mA
Error Amplifier Output Current (Pin 7) . +10mA/− (Self Limiting)
Power Dissipation at TA = 25 (Note 3). . . . . . . . . . . 1000mW
Power Dissipation at TC = 25 (Note 3). . . . . . . . . . . 2000mW
Storage Temperature Range . . . . . .  .. . . . . . . . 65 to +150
Lead Temperature (soldering, 10 seconds). . . . . . . . . . +300



Description

The UCC1806 family of BiCMOS PWM controllers offers exceptionally improved performance with a familiar architecture. With the same block diagram and pinout of the popular UC1846 series, the UCC1806 line features increased switching frequency capability while greatly reducing the bias current used within the device. With a typical startup current of 50A and a well defined voltage threshold for turn-on, these devices are favored for applications ranging from off-line power supplies to battery operated portable equipment. Dual high current, FET driving outputs and a fast current sense loop further enhance device versatility.

All the benefits of current mode control UCC1806 including simpler loop closing, voltage feed-forward, parallelability with current sharing, pulse-by-pulse current limiting, and push-pull symmetry correction are readily achievable with the UCC1806 series.