UCC27321, UCC27322

UCC37321, UCC37322

SLUS504D − SEPTEMBER 2002 − REVISED SEPTEMBER 2007

5

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pin configurations

1

2

3

4

8

7

6

5

VDD

IN

ENBL

AGND

VDD

OUT

OUT

PGND

PDIP (P) PACKAGE

(TOP VIEW)

SOIC (D) OR MSOP (DGN) PACKAGE

(TOP VIEW)

VDD

OUT

OUT

PGND

8

7

6

5

1

2

3

4

VDD

IN

ENBL

AGND

power dissipation rating table

PACKAGE

SUFFIX

θjc (5C/W)

θja (5C/W)

Power Rating

(mW)

TA = 705C †

Derating Factor

Above

70

5C (mW/5C) †

SOIC-8

D

42

84 – 160

}

344−655

}

6.25 − 11.9

}

PDIP-8

P

49

110

500

9

MSOP PowerPAD-8

DGN

4.7

50−59

1370

17.1

† 125°C operating junction temperature is used for power rating calculations

‡ The range of values indicates the effect of pc−board. These values are intended to give the system designer an indication

of the best and worst case conditions. In general, the system designer should attempt to use larger traces on the pc−board

where possible in order to spread the heat away form the device more effectively. For additional information on device

temperature management, please refer to Packaging Information section of the Power Supply Control Products Data

Book, (Ti Literature Number SLUD003).

terminal functions

TERMINAL

FUNCTION

NO.

NAME

I/O

FUNCTION

4

AGND

−

Common ground for input stage. This ground should be connected very closely to the

source of the power MOSFET which the driver is driving. Grounds are separated to mini-

mize ringing affects due to output switching di/dt which can affect the input threshold.

3

ENBL

I

Enable input for the driver with logic compatible threshold and hysteresis. The driver output

can be enabled and disabled with this pin. It is internally pulled up to VDD with 100-kΩ

resistor for active high operation. The output state when the device is disabled will be low

regardless of the input state.

2

IN

I

Input signal of the driver which has logic compatible threshold and hysteresis.

6, 7

OUT

O

Driver outputs that must be connected together externally. The output stage is capable of

providing 9-A peak drive current to the gate of a power MOSFET.

5

PGND

−

Common ground for output stage. This ground should be connected very closely to the

source of the power MOSFET which the driver is driving. Grounds are separated to mini-

mize ringing affects due to output switching di/dt which can affect the input threshold.

1, 8

VDD

I

Supply voltage and the power input connections for this device. Three pins must be con-

nected together externally.