TDA8140 datasheet(3/10 Pages) STMICROELECTRONICS

3 / 10 page

ELECTRICAL CHARACTERISTICS (VCC = 12V, Tamb = 25

oC unless otherwise specified)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VCC

Supply Voltage

Quiescent Current

All Inputs Open

Ip0

Positive Output Current (source)

1.5

In0

Negative Output Current (sink)

Io0

Positive quiescent output current forcing

the output to 6 V and the sense input to

ground, output externally forced to 6V

Remote Input 1

Remote Input 0

120

150

200

100

GON

Transconductance ON Phase (1)

See Figure 1

1.8

2.0

2.2

A/V

GOFF

Transconductance OFF Phase (2)

See Figure 1

1.8

2.0

2.2

A/V

GREMOTE

Transconductance Standby Mode

Remote Input 0

0.675

0.75

0.825

A/V

Current Source Pin 5

V6 = 500mV

135

165

200

µA

RINS

Sense Input Resistance

VS > 0

VS < 0

0.7

0.35

0.5

1.3

0.7

Ω

IINS

Sense Input Bias Current

VS = 0, Remote Input 1

– 200

– 300

– 400

µA

RSYN

Synchronous Detection Input Resistance

VSYN < 7V

VSYN > 7V

150

Ω

VTHS

Threshold Voltage of the Synchronous

Detection Input

1.8

2.8

VSYN

Sync Detect Input Voltage

VTHA

Threshold Voltage of Control Input

1.5

2.5

IINA

Pull up Current of Control Input

0 < VIN < VTHA

VIN > VTHA + 0.5V

– 50

- 1

– 100

– 160

+ 1

µA

VTHB

Threshold Voltage Remote Input

1.5

2.5

IINB

Pull up Current of the Remote Input

0 < VIN < VTHB

VIN > VTHB + 0.5V

– 50

– 1

– 100

– 160

+ 1

µA

tdr

Remote Delay Time (3)

190

250

300

µs

tdon

On Delay Time

4.5

µs

VCC–VOUT

Output Voltage Drop for Ip0 = 1 A

2.8

VCC ON

Supply Voltage for Device "ON"

≥ 0

5.8

6.4

7.0

VCC OFF

Supply Voltage for Device "OFF"

(output internally switched to ground)

5.6

VCC ON

– 0.2 V

6.8

VS limit

Sense Limit Voltage (4)

0.8

0.9

Notes : 1. GON is measured with V3 varying from 150mV to 350mV (Pin 5 is grounded)

2. GOFF is measured with V5 varying from 150mV to 350mV (Pin 3 is grounded)

3. When the remote input goes from HIGH to LOW the BU508 is switched off and it remains in this condition for the time tdr.

4. The sense input voltage VS is internally limited and results in a limited positive output current Ip0 = g VS limit. Note that due to

the storage time tS of the BU508 limiting of VS leads to a reduced base current of the BU508 and the output current I0 is going to

the positive quiescent current IO0.

TRUTH TABLE

Logic Inputs

Output Io

Mode

Control Input

Remote/Standby

Floating or 1

Io > 0

Io < 0 (5)

BU508 ON

BU508 OFF

Normal Function

Io < 0 (5)

0 < t < tdr

BU508 OFF

Remote/Standby

Function

Io > 0

t > tdr

BU508 ON

Note :

5. IO < 0 means that the sink current flows into the output to ground.

TDA8140

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