6

7

SYNC. DET.

THERMAL

PROTECTION

I

B1

S

V

I

B2

C

V

82

1

3

4

5

9

10111213

141516

SPECIAL

REMOTE

STANDBY

CONTROL

IN

PROTECTION AND

REMOTE STANBY INPUT

C

1nF

100k

Ω

OUT

SENSE

IN

GND

27

Ω

220

µF

BU508

22nF

4.7

Ω

10

µH

0.15

Ω

V

H

R

S

V

&

TDA8140

BLOCK DIAGRAM

PIN FUNCTION

Pin

Name

Function

1

Output

Device Output

Supply Voltage

3

Sense Input

Input voltage that determines output current.

4

Sense GND

Reference Ground for Input Voltage at Sense Input

Capacitor between this terminal and Sense Ground determines the

6

Special Remote/Standby

standby mode independent from control input (2nd priority) (in

standard applications pin 6 must be left unconnected).

7

Control Input

High level at this input switches the BU508 off, low level switches

the BU508 on.

8

Protection and Remote Standby

Input

A high level at this input switches the BU508 off independent from

all other inputs (1st priority).

9-16

Power Ground

Common Ground

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

DC Supply Voltage

18

V

Output Current

Internally Limited

Power Dissipation

Internally Limited

Storage and Junction Temperature

– 40, + 150

°C

Operating Temperature

0, + 70

°C

THERMAL DATA

Symbol

Parameter

Value

Unit

Thermal Resistance Junction-ambient

Max

70

°C/W

Thermal Resistance Junction-case

Max

15

°C/W

TDA8140

2/10