鈥?/div>
3.0A Peak Current Totem Pole
Output
5 to 35V Operation
25ns Rise and Fall Times
25ns Propagation Delays
Thermal Shutdown and Under-
Voltage Protection
DESCRIPTION
The UC1708 family of power drivers is made with a high-speed,
high-voltage, Schottky process to interface control functions and high-power
switching devices 鈥?particularly power MOSFETs. Operating over a 5 to 35
volt supply range, these devices contain two independent channels. The A
and B inputs are compatible with TTL and CMOS logic families, but can
withstand input voltages as high as V
IN
. Each output can source or sink up
to 3A as long as power dissipation limits are not exceeded.
Although each output can be activated independently with its own inputs,
they can be forced low in common through the action of either a digital high
signal at the Shutdown terminal or by forcing the Enable terminal low. The
High-Speed, Power MOSFET
Compatible
Shutdown terminal will only force the outputs low, it will not effect the behav-
ior of the rest of the device. The Enable terminal effectively places the device
Efficient High Frequency Operation
in under-voltage lockout, reducing power consumption by as much as 90%.
During under-voltage and disable (Enable terminal forced low) conditions,
Low Cross-Conduction Current
Spike
the outputs are held in a self-biasing, low-voltage, state.
Enable and Shutdown Functions
Wide Input Voltage Range
ESD Protection to 2kV
The UC3708 and UC2708 are available in plastic 8-pin MINI DIP and 16-pin
鈥渂at-wing鈥?DIP packages for commercial operation over a 0
o
C to +70
o
C tem-
perature range and industrial temperature range of -25
o
C to +85
o
C
respectively. For operation over a -55
o
C to +125
o
C temperature range, the
UC1708 is available in hermetically sealed 8-pin MINI CDIP, 16 pin CDIP
and 20 pin CLCC packages. Surface mount devices are also available.
BLOCK DIAGRAM
UDG-92024-1
Note: Shutdown feature is not available in J or N packages only.
SLUS171A - MARCH 1997 - REVISED AUGUST 2001