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M
Features
TC1426/TC1427/TC1428
Package Type
8-Pin PDIP/SOIC
NC 1 IN A 2 GND 3 IN B 4 2, 4 7, 5 TC1426CPA 8 NC NC 1 TC1427CPA 8 NC NC 1 TC1428CPA 8 NC 7 OUT A 6 VDD 5 OUT B 2 7
1.2A Dual High-Speed MOSFET Drivers
* Low Cost * Latch-Up Protected: Will Withstand 500mA Reverse Output Current * ESD Protected 2kV * High Peak Output Current: 1.2A * Wide Operating Range - 4.5V to 16V * High Capacitive Load Drive Capability: 1000pF in 38nsec * Low Delay Time: 75nsec Max * Logic Input Threshold Independent of Supply Voltage * Output Voltage Swing to Within 25mV of Ground or VDD * Low Output Impedance: 8
7 OUT A IN A 2 6 VDD GND 3
7 OUT A IN A 2 6 VDD GND 3
5 OUT B IN B 4 2, 4 7, 5
5 OUT B IN B 4
Inverting
Noninverting 4 5
NC 1 IN A 2 GND 3 IN B 4 2, 4 7, 5 TC1426COA
8 NC
NC 1 TC1427COA
8 NC 7 OUT A 6 VDD
NC 1 TC1428COA
8 NC 7 OUT A 6 VDD 5 OUT B 2 7
7 OUT A IN A 2 6 VDD GND 3
5 OUT B IN B 4 2, 4 7, 5
5 OUT B IN B 4
Inverting NC = No connection
Noninverting 4 5
General Description
The TC1426/TC1427/TC1428 are a family of 1.2A dual high-speed drivers. CMOS fabrication is used for low power consumption and high efficiency. 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. 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.
Applications
* * * * * Power MOSFET Drivers Switched Mode Power Supplies Pulse Transformer Drive Small Motor Controls Print Head Drive
Device Selection Table
Part Number TC1426COA TC1426CPA TC1427COA TC1427CPA TC1428COA TC1428CPA Package 8-Pin SOIC 8-Pin PDIP 8-Pin SOIC 8-Pin PDIP 8-Pin SOIC 8-Pin PDIP Temp. Range 0C to +70C 0C to +70C 0C to +70C 0C to +70C 0C to +70C 0C to +70C
2002 Microchip Technology Inc.
DS21393B-page 1
TC1426/TC1427/TC1428
Functional Block Diagram
V+ 500A 2.5mA TC1426 Inverting TC1427 Noninverting TC1428 Inverting/Noninverting Noninverting Output (TC1427) Input Inverting Output (TC1426)
GND NOTE: TC1428 has one inverting and one noninverting driver. Ground any unused driver input.
DS21393B-page 2
2002 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 70C) PDIP ........................................................ 730mW SOIC........................................................ 470mW Derating Factor PDIP ........................................................8mW/C SOIC........................................................4mW/C Operating Temperature Range C Version .........................................0C to +70C Storage Temperature Range ............. -65C to +150C
TC1426/TC1427/TC1428 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: TA = +25C, with 4.5V VDD 16V, unless otherwise noted. Symbol Input VIH VIL IIN Output VOH VOL RO IPK IREV High Output Voltage Low Output Voltage Output Resistance Peak Output Current Latch-Up Current Withstand Reverse Current Rise Time Fall Time Delay Time Delay Time Power Supply Current
1: Switching times ensured by design.
Parameter
Min
Typ
Max
Units
Test Conditions
Logic 1, High Input Voltage Logic 0, Low Input Voltage Input Current
3 -- -1 VDD - 0.025 -- -- -- -- --
-- -- -- -- -- 12 8 1.2 >500
-- 0.8 1 -- 0.025 18 12 -- --
V V
A
0V VIN VDD Figure 3-1, Figure 3-2 Figure 3-1, Figure 3-2 IOUT = 10mA, VDD = 16V
V V
A mA
Switching Time (Note 1) tR tF tD1 tD2 IS
Note
-- -- -- -- -- --
-- -- -- -- -- --
35 25 75 75 9 0.5
nsec nsec nsec nsec mA
Figure 3-1, Figure 3-2 Figure 3-1, Figure 3-2 Figure 3-1, Figure 3-2 Figure 3-1, Figure 3-2 VIN = 3V (Both Inputs) VIN = 0V (Both Inputs)
Power Supply
2002 Microchip Technology Inc.
DS21393B-page 3
TC1426/TC1427/TC1428
TC1426/TC1427/TC1428 ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: Over operating temperature range with 4.5V VDD 16V, unless otherwise noted. Symbol Input VIH VIL IIN Output VOH VOL RO IREV High Output Voltage Low Output Voltage Output Resistance Latch-Up Current Withstand Reverse Current Rise Time Fall Time Delay Time Delay Time Power Supply Current
1: Switching times ensured by design.
Parameter
Min
Typ
Max
Units
Test Conditions
Logic 1, High Input Voltage Logic 0, Low Input Voltage Input Current
3 -- -10 VDD - 0.025 -- -- -- --
-- -- -- -- -- 15 10 >500
-- 0.8 10 -- 0.025 23 18 --
V V
A
0V VIN VDD Figure 3-1, Figure 3-2 Figure 3-1, Figure 3-2 IOUT = 10mA, VDD = 16V
V V
mA
Switching Time (Note 1) tR tF tD1 tD2 IS
Note
-- -- -- -- -- --
-- -- -- -- -- --
60 40 125 125 13 0.7
nsec nsec nsec nsec mA
Figure 3-1, Figure 3-2 Figure 3-1, Figure 3-2 Figure 3-1, Figure 3-2 Figure 3-1, Figure 3-2 VIN = 3V (Both Inputs) VIN = 0V (Both Inputs)
Power Supply
DS21393B-page 4
2002 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) 1 2 3 4 5 6 7 8
PIN FUNCTION TABLE
Symbol NC IN A GND IN B OUT B VDD OUT A NC No connection. Control input A, TTL/CMOS compatible logic input. Ground. Control input B, TTL/CMOS compatible logic input. Output B, CMOS totem-pole output. Supply input, 4.5V to 16V. Output A, CMOS totem-pole output. No connection. Description
2002 Microchip Technology Inc.
DS21393B-page 5
TC1426/TC1427/TC1428
3.0
3.1
APPLICATIONS INFORMATION
SUPPLY BYPASSING
3.3
INPUT STAGE
Large currents are required to charge and discharge capacitive loads quickly. For example, charging a 1000pF load to 16V in 25nsec requires a 0.8A current from the device's power supply. To guarantee 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 (<0.5-in.) should be used. A 1.0F film capacitor in parallel with one or two 0.1F ceramic MLC capacitors normally provides adequate bypassing.
The input voltage level changes the no-load or quiescent supply current. The N-channel MOSFET input stage transistor drives a 2.5mA current source load. With a logic "1" input, the maximum quiescent supply current is 9mA. Logic "0" input level signals reduce quiescent current to 500A maximum. Unused driver inputs must be connected to VDD or GND. Minimum power dissipation occurs for logic "0" inputs for the TC1426/TC1427/TC1428. The drivers are designed with 100mV of hysteresis. This provides clean transitions and minimizes output stage current spiking when changing states. Input voltage thresholds are approximately 1.5V, making a logic "1" input any voltage greater than 1.5V up to VDD. Input current is less than 1A over this range. The TC1426/TC1427/TC1428 may be directly driven by the TL494, SG1526/27, TC38C42, TC170 and similar switch-mode power supply integrated circuits.
3.2
GROUNDING
The TC1426 and TC1428 contain inverting drivers. Individual ground returns for the input and output circuits or a ground plane should be used. This will reduce negative feedback that causes degradation in switching speed characteristics.
FIGURE 3-1:
INVERTING DRIVER SWITCHING TIME
VDD = 16V
FIGURE 3-2:
NONINVERTING DRIVER SWITCHING TIME
VDD = 16V
Test Circuit
Test Circuit
1F MKS-2 Input 1
0.1F MLC
1F WIMA MKS-2 Input 1
0.1F MLC
Output CL = 1000pF
Output CL = 1000pF
2
2
TC1426 (1/2 TC1428)
TC1427 (1/2 TC1428)
+5V Input 0V VDD Output 0V 10% 10% tD1 90% tF
90%
+5V Input 0V 10% 90% tR 10%
90%
tD2
tR 90%
VDD Output 0V
tD1
tD2
90% tF 10%
10%
DS21393B-page 6
2002 Microchip Technology Inc.
TC1426/TC1427/TC1428
4.0
Note:
TYPICAL CHARACTERISTICS
The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Rise Time vs. Supply Voltage
550 440
TIME (nsec) TIME (nsec)
TA = +25C
Fall Time vs. Supply Voltage
330
TA = +25C
Delay Time vs. Supply Voltage
80
CL = 1000pF TA = +25C
264 10,000pF
TIME (nsec)
70
330
198
10,000pF
60
220 4700pF 110 2200pF
132 4700pF 66 2200pF
50
tD1
40
tD2
0 5 7 9 11 VDD (V) 13 15
0
5
7
9 11 VDD (V)
13
15
30
5
7
11 9 VDD (V)
13
15
Rise and Fall Times vs. Temperature
40
CL = 1000pF VDD = +15V tRISE
Delay Time vs. Temperature
60
CL = 1000pF VDD = +15V
Supply Current vs. Capacitive Load
30
CL = 1000pF VDD = +15V TA = +25C
SUPPLY CURRENT (mA)
32
TIME (nsec)
54
TIME (nsec)
tD2
500kHz
24
24
tFALL
48
18
200kHz
16
42
tD1
12
20kHz
8
36
6 0
0 25
0 45 65 85 105 TEMPERATURE (C) 125 25 45 65 85 105 TEMPERATURE (C) 125
100
520 940 1360 1780 CAPACITIVE LOAD (pF)
2200
Rise Time vs. Capacitive Load
1000
TA = +25C
Fall Time vs. Capacitive Load
1000
TA = +25C
Supply Current vs. Frequency
100
CL = 1000pF TA = +25C VDD = 15V VDD = 10V
SUPPLY CURRENT (mA)
80
TIME (nsec)
TIME (nsec)
5 VDD
100
10 VDD
100 10 VDD
5 VDD
60
40
15 VDD
15VDD 10 100
20 VDD = 5V 0 10
10 100
1000 CAPACITIVE LOAD (pF)
10,000
10,000 1000 CAPACITIVE LOAD (pF)
100 1000 FREQUENCY (kHz)
10,000
2002 Microchip Technology Inc.
DS21393B-page 7
TC1426/TC1427/TC1428
TYPICAL CHARACTERISTICS (CONTINUED)
Low-State Output Resistance
15 100mA 13 50mA
TA = +25C
High-State Output Resistance
50 42 100mA
TA = +25C
Crossover Energy Loss
10-8
ROUT ( )
R OUT ()
A (sec)
9 11 VDD (V) 13 15
11
34
10-9
9 10mA 7
26
50mA
18 10mA
5 5 7 9 11 VDD (V) 13 15
10 5 7
10-10
4
6
8
10 12 VDD (V)
14
16
18
Quiescent Power Supply Current vs. Supply Voltage
20 BOTH INPUTS LOGIC "0" 15 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) 20
Quiescent Power Supply Current vs. Supply Voltage
BOTH INPUTS LOGIC "1"
15
10
10
5
5
0 0 50 100 150 200 300 400 SUPPLY CURRENT (A)
0 1 2 3 4 5 6 SUPPLY CURRENT (mA)
Thermal Derating Curves
1600 1400 8 Pin DIP
MAX. POWER (mW)
1200 1000 800 8 Pin SOIC 600 400 200 0 0 10 20 30 40 50 60 70 80 90 100 110 120
AMBIENT TEMPERATURE (C)
DS21393B-page 8
2002 Microchip Technology Inc.
TC1426/TC1427/TC1428
5.0
5.1
PACKAGING INFORMATION
Package Marking Information
Package marking data not available at this time.
5.2
Package Dimensions
8-Pin Plastic DIP
PIN 1
.260 (6.60) .240 (6.10)
.045 (1.14) .030 (0.76) .400 (10.16) .348 (8.84) .200 (5.08) .140 (3.56) .150 (3.81) .115 (2.92)
.070 (1.78) .040 (1.02)
.310 (7.87) .290 (7.37)
.040 (1.02) .020 (0.51)
.015 (0.38) .008 (0.20) .400 (10.16) .310 (7.87)
3 MIN.
.110 (2.79) .090 (2.29)
.022 (0.56) .015 (0.38)
Dimensions: inches (mm)
8-Pin SOIC
PIN 1
.157 (3.99) .150 (3.81)
.244 (6.20) .228 (5.79)
.050 (1.27) TYP.
.197 (5.00) .189 (4.80) .069 (1.75) .053 (1.35) .020 (0.51) .010 (0.25) .013 (0.33) .004 (0.10) .010 (0.25) .007 (0.18) .050 (1.27) .016 (0.40)
Dimensions: inches (mm)
8 MAX. .
2002 Microchip Technology Inc.
DS21393B-page 9
TC1426/TC1427/TC1428
NOTES:
DS21393B-page 10
2002 Microchip Technology Inc.
TC1426/TC1427/TC1428
Sales and Support
Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. 2. 3. Your local Microchip sales office The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277 The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
2002 Microchip Technology Inc.
DS21393B-page11
TC1426/TC1427/TC1428
NOTES:
DS21393B-page12
2002 Microchip Technology Inc.
TC1426/TC1427/TC1428
Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip's products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights.
Trademarks The Microchip name and logo, the Microchip logo, FilterLab, KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER, PICSTART, PRO MATE, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. Serialized Quick Turn Programming (SQTP) is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received QS-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona in July 1999 and Mountain View, California in March 2002. The Company's quality system processes and procedures are QS-9000 compliant for its PICmicro(R) 8-bit MCUs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, non-volatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001 certified.
2002 Microchip Technology Inc.
DS21393B-page 13
M
WORLDWIDE SALES AND SERVICE
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03/01/02
' &
DS21393B-page 14
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2002 Microchip Technology Inc.

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