TPS2811, TPS2812, TPS2813, TPS2814, TPS2815

DUAL HIGH-SPEED MOSFET DRIVERS

SLVS132D – NOVEMBER 1995 – REVISED NOVEMBER 1997

14

POST OFFICE BOX 655303

APPLICATION INFORMATION

The TPS2811, TPS2812 and TPS2813 circuits each contain one regulator and two MOSFET drivers. The

while providing up to 20 mA of dc drive. The TPS2814 and TPS2815 both contain two drivers, each of which

has two inputs. The TPS2811 has inverting drivers, the TPS2812 has noninverting drivers, and the TPS2813

has one inverting and one noninverting driver. The TPS2814 is a dual 2-input AND driver with one inverting input

on each driver, and the TPS2815 is a dual 2-input NAND driver. These MOSFET drivers are capable of supplying

up to 2.1 A or sinking up to 1.9 A (see Figures 15 and 16) of instantaneous current to n-channel or p-channel

MOSFETs. The TPS2811 family of MOSFET drivers have very fast switching times combined with very short

propagation delays. These features enhance the operation of today’s high-frequency circuits.

Schmidt trigger switching. In addition, the design is such that the normal shoot-through current in CMOS (when

is evident in the graphs in Figures 17 and 18. The input stage shown in the functional block diagram better

illustrates the way the front end works. The circuitry of the device is such that regardless of the rise and/or fall

time of the input signal, the output signal will always have a fast transition speed; this basically isolates the

waveforms at the input from the output. Therefore, the specified switching times are not affected by the slopes

of the input waveforms.

The basic driver portion of the circuits operate over a supply voltage range of 4 V to 14 V with a maximum bias

current of 5

µA. Each driver consists of a CMOS input and a buffered output with a 2-A instantaneous drive

capability. They have propagation delays of less than 30 ns and rise and fall times of less than 20 ns each.

Placing a 0.1-

instantaneous current needed by the fast switching and high current surges of the driver when it is driving a

MOSFET.

The output circuit is also shown in the functional block diagram. This driver uses a unique combination of a

instantaneous driver current. This unique parallel combination of bipolar and MOSFET output transistors

The regulator, included in the TPS2811, TPS2812 and TPS2813, has an input voltage range of 14 V to 40 V.

It produces an output voltage of 10 V to 13 V and is capable of supplying from 0 to 20 mA of output current. In

grounded source applications, this extends the overall circuit operation to 40 V by clamping the driver supply

maximum of 150

µA. A 0.1-µF capacitor connected between the regulator output and ground is required to

ensure stability. For transient response, an additional 4.7-

µF electrolytic capacitor on the output and a 0.1-µF

ceramic capacitor on the input will optimize the performance of this circuit. When the regulator is not in use, it

can be left open at both the input and the output, or the input can be shorted to the output and tied to either the