UC1708
UC2708
UC3708
www.ti.com
SLUS171C – MARCH 1997 – REVISED SEPTEMBER 2007
DUAL NON-INVERTING POWER DRIVER
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FEATURES
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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
High-Speed, Power MOSFET Compatible
Efficient High Frequency Operation
Low Cross-Conduction Current Spike
Enable and Shutdown Functions
Wide Input Voltage Range
ESD Protection to 2kV
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 – particularly power MOSFETs. Operating over a 5 V to 35 V
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 VIN. Each output can source or sink up to 3 A
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 Shutdown terminal will only force the outputs low, it will not effect the behavior of the rest of the device. The
Enable terminal effectively places the device in under-voltage lockout, reducing power consumption by as much
as 90%. During under-voltage and disable (Enable terminal forced low) conditions, the outputs are held in a
self-biasing, low-voltage, state.
The UC3708 and UC2708 are available in plastic 8-pin MINI DIP and 16-pin bat-wing DIP packages for
commercial operation over a 0°C to 70°C temperature range and industrial temperature range of –25°C to 85°C
respectively. For operation over a –55°C to 125°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
VIN
Enable
5.6 V
Reg
Internal
Bias
Logic Gnd
Thermal
Shutdown
Output A
Pwr Gnd A
Input A
Input B
Output B
Shutdown
Pwr Gnd B
NOTE: Shutdown feature is not available in J or N packages only.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1997–2007, Texas Instruments Incorporated
UC1708
UC2708
UC3708
www.ti.com
SLUS171C – MARCH 1997 – REVISED SEPTEMBER 2007
CONNECTION DIAGRAMS
DIL-8 (Top View)
J Or N Package
SOIC-16 (Top View)
DW Package
Pwr Gnd A
NC
Input A
Gnd
Input B
NC
Output A
VIN
Input A
Output A
Enable
VIN
Logic Gnd
NC
NC
NC
Shutdown
VIN
Output B
Output B
Input B
NC
DIL-16 (Top View)
JE Or NE Package
Input A
Output A
Enable
VIN
ENABLE
4
2
1
PWR GND A
3
20 19
18
VIN
Logic Gnd
Logic Gnd
LOGIC GND
5
17
NC
Logic Gnd
Logic Gnd
NC
6
16
NC
VIN
NC 7
15
NC
Shutdown
14
VIN
Submit Documentation Feedback
13
PWR GND B
Note: In JE package, Pin 4 is Logic Ground.
Pins 5, 12, and 13 are no connect.
10 11 12
NC
Pwr Gnd B
9
OUTPUT B
8
NC
NC
Output B
SHUTDOWN
INPUT B
Input B
2
NC
Pwr Gnd A
INPUT A
CLCC-20 (Top View)
L Package
NC
NC
Pwr Gnd B
OUTPUT A
Enable
Copyright © 1997–2007, Texas Instruments Incorporated
Product Folder Link(s): UC1708 UC2708 UC3708
UC1708
UC2708
UC3708
www.ti.com
SLUS171C – MARCH 1997 – REVISED SEPTEMBER 2007
ABSOLUTE MAXIMUM RATINGS (1)
VALUE
UNIT
Supply Voltage, VIN
Output Current (Each Output, Source or Sink)
V
A
3
A
–0.3 to (VIN + 0.3)
V
–0.3 to 6.2
V
–0.3 to (VIN + 0.3)
V
Peak Transient
Ouput Voltage
Enable and Shutdown Inputs
A and B Inputs
Operating Junction Temperature
35
0.5
Steady-State
150
°C
–65 to 150
°C
300
°C
(2)
Storage Temperature Range
Lead Temperature (Soldering, 10 Seconds)
(1)
(2)
All voltages are with respect to Logic Gnd pin. All currents are positive into, negative out of, device terminals.r
Consult Unitrode Integrated Circuits databook for information regarding thermal specifications and limitations of packages.
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, VIN=10V to 35V, and these specifications apply for: –55°C
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