TC1426/TC1427/TC1428
1.2A Dual High-Speed MOSFET Drivers
Features:
Package Type
• Low Cost
• Latch-Up Protected: Will Withstand 500 mA
Reverse Output Current
• ESD Protected ±2kV
• High Peak Output Current: 1.2A
• Wide Operating Range:
- 4.5V to 16V
• High Capacitive Load Drive Capability: 1000 pF in
38 nsec
• Low Delay Time: 75 nsec Max
• Logic Input Threshold Independent of Supply
Voltage
• Output Voltage Swing to Within 25 mV of Ground
or VDD
• Low Output Impedance: 8
Power MOSFET Drivers
Switched Mode Power Supplies
Pulse Transformer Drive
Small Motor Controls
Print Head Drive
Package
Temp. Range
8-Pin SOIC
0°C to +70°C
TC1426CPA
8-Pin PDIP
0°C to +70°C
TC1427COA
8-Pin SOIC
0°C to +70°C
TC1427CPA
8-Pin PDIP
0°C to +70°C
TC1428COA
8-Pin SOIC
0°C to +70°C
TC1428CPA
8-Pin PDIP
0°C to +70°C
TC1426COA
8 NC
GND 3
7 OUT A
TC1426CPA
6 VDD
IN B 4
NC 1
GND 3
7 OUT A
TC1427CPA
5 OUT B IN B 4
2, 4
7, 5
NC 1
7 OUT A
TC1426COA
IN B 4
7, 5
Inverting
GND 3
7, 5
6 VDD
NC 1
8 NC
IN A 2
TC1427COA
GND 3
7 OUT A
6 VDD
5 OUT B IN B 4
2, 4
8 NC
7 OUT A
TC1428CPA
6 VDD
5 OUT B
2
7
4
5
Noninverting
8 NC
IN A 2
6 VDD
NC 1
IN A 2
5 OUT B IN B 4
2, 4
Inverting
GND 3
8 NC
IN A 2
NC 1
IN A 2
8 NC
TC1428COA
GND 3
5 OUT B IN B 4
2, 4
7, 5
7 OUT A
6 VDD
5 OUT B
2
7
4
5
Noninverting
NC = No connection
General Description:
These devices are fabricated using an epitaxial layer to
effectively short out the intrinsic parasitic transistor
responsible for CMOS latch-up. They incorporate a
number of other design and process refinements to
increase their long-term reliability.
Device Selection Table
Part Number
NC 1
IN A 2
The TC1426/TC1427/TC1428 are a family of 1.2A dual
high-speed drivers. CMOS fabrication is used for lowpower consumption and high efficiency.
Applications:
•
•
•
•
•
8-Pin PDIP/SOIC
The TC1426 is compatible with the bipolar DS0026, but
only draws 1/5 of the quiescent current. The TC1426/
TC1427/TC1428 are also compatible with the TC426/
TC427/TC428, but with 1.2A peak output current rather
than the 1.5A of the TC426/TC427/TC428 devices.
Other compatible drivers are the TC4426/TC4427/
TC4428 and the TC4426A/TC4427A/TC4428A. The
TC4426/TC4427/TC4428 have the added feature that
the inputs can withstand negative voltage up to 5V with
diode protection circuits. The TC4426A/TC4427A/
TC4428A have matched input to output leading edge
and falling edge delays, tD1 and tD2, for processing
short duration pulses in the 25 nanoseconds range. All
of the above drivers are pin compatible.
The high-input impedance TC1426/TC1427/TC1428
drivers are CMOS/TTL input-compatible, do not require
the speed-up needed by the bipolar devices, and can
be directly driven by most PWM ICs.
This family of devices is available in inverting and noninverting versions. Specifications have been optimized
to achieve low-cost and high-performance devices,
well-suited for the high-volume manufacturer.
2001-2012 Microchip Technology Inc.
DS21393D-page 1
TC1426/TC1427/TC1428
Functional Block Diagram
V+
≈500 μA
≈2.5 μA
TC1426 Inverting
TC1427 Noninverting
TC1428 Inverting/Noninverting
Noninverting
Output
Inverting
Output
(TC1427)
(TC1426)
Input
GND
NOTE: TC1428 has one inverting and one noninverting driver.
Ground any unused driver input.
DS21393D-page 2
2001-2012 Microchip Technology Inc.
TC1426/TC1427/TC1428
1.0
ELECTRICAL
CHARACTERISTICS
*Stresses above those listed under "Absolute
Maximum Ratings" may cause permanent damage to
the device. These are stress ratings only and functional
operation of the device at these or any other conditions
above those indicated in the operation sections of the
specifications is not implied. Exposure to Absolute
Maximum Rating conditions for extended periods may
affect device reliability.
Absolute Maximum Ratings*
Supply Voltage ..................................................... +18V
Input Voltage, Any Terminal
................................... VDD + 0.3V to GND – 0.3V
Power Dissipation (TA 70°C)
PDIP........................................................ 730 mW
SOIC ....................................................... 470 mW
Derating Factor
PDIP....................................................... 8 mW/C
SOIC ...................................................... 4 mW/C
Operating Temperature Range
C Version ........................................ 0°C to +70°C
Storage Temperature Range.............. -65°C to +150°C
TC1426/TC1427/TC1428 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: TA = +25°C, with 4.5V VDD16V, unless otherwise noted.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
Input
VIH
Logic 1, High Input Voltage
3
—
—
V
VIL
Logic 0, Low Input Voltage
—
—
0.8
V
IIN
Input Current
-1
—
1
A
0VVINVDD
Output
VOH
High Output Voltage
VDD – 0.025
—
—
V
Figure 3-1, Figure 3-2
VOL
Low Output Voltage
—
—
0.025
V
Figure 3-1, Figure 3-2
RO
Output Resistance
—
—
12
8
18
12
IOUT = 10 mA, VDD = 16V
IPK
Peak Output Current
—
1.2
—
A
IREV
Latch-Up Current
Withstand Reverse Current
—
>500
—
mA
Switching Time (Note 1)
tR
Rise Time
—
—
35
nsec
tF
Fall Time
—
—
25
nsec
Figure 3-1, Figure 3-2
tD1
Delay Time
—
—
75
nsec
Figure 3-1, Figure 3-2
tD2
Delay Time
—
—
75
nsec
Figure 3-1, Figure 3-2
—
—
—
—
9
0.5
mA
VIN = 3V (Both Inputs)
VIN = 0V (Both Inputs)
Figure 3-1, Figure 3-2
Power Supply
Power Supply Current
IS
Note
1:
Switching times ensured by design.
2001-2012 Microchip Technology Inc.
DS21393D-page 3
TC1426/TC1427/TC1428
TC1426/TC1427/TC1428 ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: Over operating temperature range with 4.5V VDD16V, unless otherwise noted.
Symbol
Parameter
Min
Typ
Max
Units
V
Test Conditions
Input
VIH
Logic 1, High Input Voltage
3
—
—
VIL
Logic 0, Low Input Voltage
—
—
0.8
V
IIN
Input Current
-10
—
10
A
0VVINVDD
Output
VOH
High Output Voltage
VDD – 0.025
—
—
V
Figure 3-1, Figure 3-2
VOL
Low Output Voltage
—
—
0.025
V
Figure 3-1, Figure 3-2
RO
Output Resistance
—
—
15
10
23
18
IOUT = 10 mA, VDD = 16V
IREV
Latch-Up Current
Withstand Reverse Current
—
>500
—
mA
Switching Time (Note 1)
tR
Rise Time
—
—
60
nsec
Figure 3-1, Figure 3-2
tF
Fall Time
—
—
40
nsec
Figure 3-1, Figure 3-2
tD1
Delay Time
—
—
125
nsec
Figure 3-1, Figure 3-2
tD2
Delay Time
—
—
125
nsec
Figure 3-1, Figure 3-2
—
—
—
—
13
0.7
mA
VIN = 3V (Both Inputs)
VIN = 0V (Both Inputs)
Power Supply
Power Supply Current
IS
Note
1:
Switching times ensured by design.
DS21393D-page 4
2001-2012 Microchip Technology Inc.
TC1426/TC1427/TC1428
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
Pin No.
(8-Pin PDIP,
SOIC)
PIN FUNCTION TABLE
Symbol
Description
1
NC
No connection.
2
IN A
Control input A, TTL/CMOS compatible logic input.
3
GND
Ground.
4
IN B
Control input B, TTL/CMOS compatible logic input.
5
OUT B
6
VDD
7
OUT A
8
NC
2001-2012 Microchip Technology Inc.
Output B, CMOS totem-pole output.
Supply input, 4.5V to 16V.
Output A, CMOS totem-pole output.
No connection.
DS21393D-page 5
TC1426/TC1427/TC1428
3.0
APPLICATIONS INFORMATION
3.1
SUPPLY BYPASSING
Large currents are required to charge and discharge
capacitive loads quickly. For example, charging a 1000
pF load to 16V in 25 nsec requires a 0.8A current from
the device's power supply.
To ensure low supply impedance over a wide frequency
range, a parallel capacitor combination is recommended for supply bypassing. Low-inductance ceramic
MLC capacitors with short lead lengths (
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