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UCC1776 Datasheet

  • UCC1776

  • Quad FET Driver

  • 7頁

  • TI

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UCC1776
UCC2776
UCC3776
Quad FET Driver
FEATURES
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High Peak Output Current
Each Output 鈥?1.5A Source,
2.0A Sink
Wide Operating Voltage
Range 4.5V to 18V
Thermal Shutdown
CMOS Compatible Inputs
Outputs Are Active Low
for Undervoltage Lockout
Condition
PRELIMINARY
DESCRIPTION
The UCC3776 is a four output BCDMOS buffer/driver designed to drive highly
capacitive loads such as power MOSFET gates at high speeds. The device
can be configured as either an inverting or non-inverting driver via the POL
pin. The outputs are enabled by ENBL. When disabled, all outputs are active
low. The device incorporates thermal shutdown with hysteresis for stability.
The device also includes an undervoltage lockout circuit (UVLO) with hystere-
sis which disables the outputs when VDD is below a preset threshold. The
outputs are held low during undervoltage lockout, even in the absence of
VDD power to the device. This helps prevent MOSFET turn-on due to capaci-
tive current through the gate-drain capacitance of the power MOSFET in the
presence of high dV/dts. The logic input thresholds are compatible with
standard 5V HCMOS logic.
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BLOCK DIAGRAM
Note: Pin connections shown refer to 16-pin packages.
UDG-95129-2
3/97
1

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