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PIN ASSIGNMENTS

(A1)

(B1)

(A4)

(C4)

(D4)

(SIDE VIEW)

MicroStar Juniort (GQY) PACKAGE

(TOP VIEW)

NC

SHUTDOWN

IN+

IN−

(C1)

(D1)

(B4)

GND

8

SHUTDOWN

NC

IN+

IN−

GND

8-PIN QFN (DRB) PACKAGE

(TOP VIEW)

7

6

5

1

2

3

4

NC − No internal connection

GND

8

7

6

5

1

2

3

4

SHUTDOWN

NC

IN+

IN−

8-PIN MSOP (DGN) PACKAGE

(TOP VIEW)

_

+

_

+

_

+

_

+

150 k

Ω

150 k

Ω

_

+

_

+

Deglitch

Logic

Deglitch

Logic

Gate

Drive

Gate

Drive

Short

Circuit

Detect

Startup

& Thermal

Protection

Logic

Ramp

Generator

Biases

and

References

TTL

Input

Buffer

SD

Gain = 2 V/V

B4, C4

A4

D4

†

GND

D1

IN−

C1

IN+

A1

SHUTDOWN

(terminal labels for MicroStar Junior

TPA2005D1-Q1

SLOS474 – AUGUST 2005

A.

The shaded terminals are used for electrical and thermal connections to the ground plane. All of the shaded terminals

must be electrically connected to ground. No connect (NC) terminals still need a pad and trace.

B.

The thermal pad of the DRB and DGN packages must be electrically and thermally connected to a ground plane.

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

ZQY, GQY

DRB, DGN

IN-

D1

4

I

Negative differential input

IN+

C1

3

I

Positive differential input

B4, C4

6

I

Power supply

D4

5

O

Positive BTL output

A2, A3, B3,

GND

C2, C3, D2,

7

I

High-current ground

D3

A4

8

O

Negative BTL output

SHUTDOWN

A1

1

I

Shutdown terminal (active low logic)

NC

B1

2

No internal connection

Thermal Pad

Must be soldered to a grounded pad on the PCB.

FUNCTIONAL BLOCK DIAGRAM

4