UC1708 [TI]
Dual Non-Inverting Power Driver; 双非反相电源驱动器
| 型号： | UC1708 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Dual Non-Inverting Power Driver |
| 文件： | 总5页 (文件大小：223K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UC1708
UC2708
UC3708
Dual Non-Inverting Power Driver
FEATURES
DESCRIPTION
•
3.0A Peak Current Totem Pole
Output
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 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 VIN. Each output can source
or sink up to 3A as long as power dissipation limits are not exceeded.
•
•
•
•
5 to 35V Operation
25ns Rise and Fall Times
25ns Propagation Delays
Thermal Shutdown and Under-
Voltage Protection
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 ef-
fect 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.
•
High-Speed, Power MOSFET
Compatible
•
•
•
•
•
Efficient High Frequency Operation
Low Cross-Conduction Current Spike
Enable and Shutdown Functions
Wide Input Voltage Range
The UC3708 and UC2708 are available in plastic 8-pin MINIDIP and 16-
o
pin "bat-wing" DIP packages for commercial operation over a 0 C to
ESD Protection to 2kV
o
o
+70 C temperature range and industrial temperature range of -25 C to
o
o
o
+85 C respectively. For operation over a -55 C to +125 C temperature
range, the UC1708 is available in hermetically sealed 8-pin MINIDIP and
16 pin DIP packages. Surface mount devices are also available.
BLOCK DIAGRAM
UDG-92024-1
Note: Shutdown feature available only in JE , NE or DW packages.
3/97
1
UC1708
UC2708
UC3708
ABSOLUTE MAXIMUM RATINGS (Note 1)
CONNECTION DIAGRAMS
Supply Voltage VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
Output Current (Each Output, Source or Sink)
DIL-8 (Top View)
J Or N Package
Steady-State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5A
Peak Transient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3A
Ouput Voltage . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (VIN + 0.3)V
Enable and Shutdown Inputs . . . . . . . . . . . . . . . . . -0.3 to 6.2V
A and B Inputs . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (VIN + 0.3)V
Operating Junction Temperature (Note 2) . . . . . . . . . . . . 150°C
Storage Temperature Range . . . . . . . . . . . . . . . . -65° to 150°C
Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . 300°C
NOTE 1: All voltages are with respect to Logic Gnd pin. All cur-
rents are positive into, negative out of, device terminals.
NOTE 2: Consult Unitrode Integrated Circuits databook for
information regarding thermal specifications and limitations of
packages.
SOIC-16 (Top View)
DW Package
DIL-16 (Top View)
JE or NE Package
Note: In JE package Pin 4 is logic ground. Pins 5, 12,
and 13 are N/C.
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, VIN=10V to 35V, and these specifications apply for:
–55oC<TA<125oC for the UC1708, –25oC<TA<+85oC for the UC2708, and 0oC<TA<70oC for the UC3708. TA = TJ.
PARAMETER
VIN Supply Current
TEST CONDITIONS
MIN
TYP
18
14
1
MAX UNITS
OutputsLow
Outputs High
Enable = 0V
26
18
4
mA
mA
mA
V
A, B and Shutdown Inputs Low
Level
0.8
A, B and Shutdown Inputs High
Level
2.0
V
A, B Input Current Low
VA,B = 0.4V
-1
-0.6
mA
µA
µA
µA
µA
mA
A, B Input Current High
VA,B = 2.4V
-200
50
A, B Input Leakage Current High
Shutdown Input Current Low
Shutdown Input Current High
VA,B = 35.3V
200
100
500
1.5
VSHUTDOWN = 0.4V
VSHUTDOWN = 2.4V
VSHUTDOWN = 6.2V
20
170
0.6
2
UC1708
UC2708
UC3708
ELECTRICAL CHARACTERISTICS (cont.): Unless otherwise stated, VIN = 10V to 35V, and these specifications apply
for: –55oC<TA<125oC for the UC1708, –25oC<TA<+85oC for the UC2708, and 0oC<TA<70oC for the UC3708. TA = TJ.
PARAMETER
Enable Input Current Low
Enable Input Current High
Enable Threshold Rising
Enable Threshold Falling
Output High Sat., VIN - VOUT
TEST CONDITIONS
MIN
TYP
MAX UNITS
VENABLE = 0V
-600
-460
200
200
3.6
3.4
2.0
2.5
0.5
2.5
µA
µA
V
VENABLE = 6.2V
2.8
2.4
1.0
V
IOUT = -50mA
IOUT = -500mA
IOUT = 50mA
IOUT = 500mA
V
V
Output Low Sat., VOUT
Thermal Shutdown
V
V
155
°C
SWITCHING CHARACTERISTICS (Figure 1)
(VIN = 20V, delays measured to 10% output change.)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNITS
From A,B Input to Output:
Rise Time Delay (TPLH)
10% to 90% Rise (TTLH)
Fall Time Delay (TPHL)
90% to 10% Fall (TTHL)
CL = 0pF
25
25
30
55
25
40
25
25
35
15
25
40
40
40
45
75
50
55
40
45
50
20
45
55
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CL = 1000pF (Note 3)
CL = 2200pF
CL = 0pF
CL = 1000pF (Note 3)
CL = 2200pF
CL = 0pF
CL = 1000pF (Note 3)
CL = 2200pF
CL = 0pF
CL = 1000pF (Note 3)
CL = 2200pF
From Shutdown Input to Output
Rise Time Delay (TPLH)
CL = 0pF
25
30
35
50
25
40
25
30
35
25
25
40
23
38
75
75
75
75
50
55
45
50
55
20
45
55
25
45
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
mA
mA
CL = 1000pF (Note 3)
CL = 2200pF
10% to 90% Rise (TTLH)
Fall Time Delay (TPHL)
90% to 10% Fall (TTHL)
Total Supply Current
CL = 0pf
CL = 1000pF (Note 3)
CL = 2200pF
CL = 0pF
CL = 1000pF (Note 3)
CL = 2200pF
CL = 0pF
CL = 1000pF (Note 3)
CL = 2200pF
F = 200kHz, 50% duty cycle, both channels; CL = 0pF
F = 200kHz, 50% duty cycle, both channels; CL = 2200pF
NOTE 3: These parameters, specified at 1000pF, although guaranteed over recommended operating conditions, are not tested in
production.
3
UC1708
UC2708
UC3708
Figure 1: AC Test Circuit and Switching Time Waveforms
4.3V
INPUT
50%
50%
0V
20V
90%
10%
90%
OUTPUT
0V
10%
TP
HL
TP
LH
TT
TT
LH
HL
UDG-92026
Figure 2: Equivalent Input Circuits
UDG-92025
Note: Shutdown feature available only in JE, NE or DW Packages.
UNITRODE CORPORATION
7 CONTINENTAL BLVD. • MERRIMACK, NH 03054
TEL. (603) 424-2410 • FAX (603) 424-3460
4
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