Document
TC4423/TC4424/TC4425
3A Dual High-Speed Power MOSFET Drivers
Features
• High Peak Output Current: 3A • Wide Input Supply Voltage Operating Range:
- 4.5V to 18V • High Capacitive Load Drive Capability:
- 1800 pF in 25 ns • Short Delay Times: <40 ns (typ) • Matched Rise/Fall Times • Low Supply Current:
- With Logic ‘1’ Input – 3.5 mA (Max) - With Logic ‘0’ Input – 350 µA (Max) • Low Output Impedance: 3.5 (typ) • Latch-Up Protected: Will Withstand 1.5A Reverse Current • Logic Input Will Withstand Negative Swing Up To 5V • ESD Protected: 4 kV • Pin compatible with the TC1426/TC1427/TC1428, TC4426/TC4427/TC4428 and TC4426A/ TC4427A/TC4428A devices. • Space-saving 8-Pin 6x5 DFN Package
Applications
• Switch Mode Power Supplies • Pulse Transformer Drive • Line Drivers
Package Types(1)
8-Pin PDIP TC4423 TC4424 TC4425
NC 1
8
IN A 2 TC4423 7
GND 3 TC4424 6 IN B 4 TC4425 5
NC
OUT A VDD OUT B
NC
OUT A VDD OUT B
NC
OUT A VDD OUT B
8-Pin DFN(2) TC4423 TC4424 TC4425
NC 1 IN A 2 GND 3 IN B 4
TC4423 TC4424 TC4425
8 NC 7 OUT A 6 VDD 5 OUT B
NC OUT A VDD OUT B
NC OUT A VDD OUT B
General Description
The TC4423/TC4424/TC4425 devices are a family of 3A, dual-output buffers/MOSFET drivers. Pin compatible with the TC1426/27/28, TC4426/27/28 and TC4426A/27A/28A dual 1.5A driver families, the TC4423/24/25 family has an increased latch-up current rating of 1.5A, making them even more robust for operation in harsh electrical environments.
As MOSFET drivers, the TC4423/TC4424/TC4425 can easily charge 1800 pF gate capacitance in under 35 nsec, providing low enough impedances in both the on and off states to ensure the MOSFET's intended state will not be affected, even by large transients.
The TC4423/TC4424/TC4425 inputs may be driven directly from either TTL or CMOS (2.4V to 18V). In addition, the 300 mV of built-in hysteresis provides noise immunity and allows the device to be driven from slowly rising or falling waveforms.
16-Pin SOIC (Wide) TC4423 TC4424 TC4425
NC 1 IN A 2 NC 3 GND 4 GND 5 NC 6 IN B 7 NC 8
TC4423 TC4424 TC4425
16 NC
15 OUT A 14 OUT A 13 VDD 12 VDD 11 OUT B 10 OUT B 9 NC
NC
OUT A OUT A VDD VDD OUT B OUT B NC
NC
OUT A OUT A VDD VDD OUT B OUT B NC
Note 1: Duplicate pins must both be connected for proper operation. 2: Exposed pad of the DFN package is electrically isolated.
2002-2012 Microchip Technology Inc.
DS21421E-page 1
TC4423/TC4424/TC4425
Functional Block Diagram(1)
750 µA 300 mV
Inverting
VDD Output
Input
Effective Input C = 20 pF
(Each Input)
GND
Non-inverting
4.7V TC4423 Dual Inverting TC4424 Dual Non-inverting TC4425 One Inverting, One Non-inverting
Note 1: Unused inputs should be grounded.
DS21421E-page 2
2002-2012 Microchip Technology Inc.
TC4423/TC4424/TC4425
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage ................................................................+22V Input Voltage, IN A or IN B
................................................ (VDD + 0.3V) to (GND – 5V) P.