Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Power Supply

°C)

Config. in fig. 3b

Config. in fig. 3c

Stand-by condition

Config. in fig 3a

1.6

1.6

1.6

4

4

4

4

V

V

V

V

V

Power Supply

Config. in fig. 3a

Config. in fig. 3b

Config. in fig. 3c

Stand-by condition

Config. in fig 3a

1.6

1.6

5

5

5.5

V

V

V

V

Current Consumption from

5

mA

Current Consumption from

1.5

mA

Leakage Current in stand-

by condition

20

µA

Output Voltages

2.4

5

V

V

0.25

0.4

Ω

Max Output Current from

150

mA

Oscillator - free freq.

- sync. freq

-

∆ free freq.

STCAP = 470pF

.

80

200

180

20

KHz

KHz

KHz

H_bridge

- Ron, actuators (CH 1,3)

- Ron, motors (CH 2,4)

I = 100mA

1.0

1.6

1.6

2.5

Ω

Ω

PWM Circuit

- Ron, actuators

- Ron, motors

I = 100mA

0.5

0.8

0.8

1.25

Ω

Ω

Reference Voltage

1.22

1.28

1.34

V

Load Regulation

µA;

-30

30

mV

Line Regulation

30

mV

AV

Bridge gain

2.8

3.6

4.5

K

Reset Time Coefficient

note 2

7.4

11

17.2

msec/

µF

Error Impedance Inputs

26

40

k

Ω

–30

30

mV

750

k

Ω

WINDIP Impedance

30

k

Ω

BEMP & BLOW

intervention threshold

0.55

0.65

0.75

V

RESET Voltage Saturation

µA

200

mV

VCON Voltage Saturation

µA

200

mV

mV

(1): all the 4 PWM outputs switched off.

To avoid reset, the frequency of watch dog pulses must be greater than (3

(3) All the 4 PWM output switched OFF, auxiliary and main DC/DC converters polarized but not switching

TDA7278

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