L6280 datasheet(4/26 Pages) STMICROELECTRONICS

4 / 26 page

ELECTRICAL CHARACTERISTICS (VS = 20V; Tj =25

°C; VSS = 5V; VDHS =15V; RO =165KΩ;

CO =680pF; unless otherwise specified)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

IDSS

Leakage Current

Fig. 1 VDS = 60V

Power Supply Voltage

Note 1,2

>VPF

VINL

Low Level Input Voltage

-0.3

1.35

IINL

Low Level Input Current

-10

µA

VINH

High Level Input Voltage

3.15

VSS

IINH

High Level Input Current

µA

VROUT

Low Level Reset Out

I16 = 1.5mA

0.8

VPF

Power Supply Fail Voltage

(Fig. 2)

Quiescent Supply Current

VS = 12V

4.5

7.5

VSS

Logic Supply Voltage

4.75

5.25

ISS(IN)

Logic Supply Current

4.5

7.5

ISS(OUT)

SMPS Out Current Range

Note 3

800

fosc

Oscillator Frequency

KHz

SMPS and CH3 Frequency

fosc

KHz

f1max

Max SMPS Switching Frequency

120

KHz

PWM Frequency

fosc/2

KHz

High Side Driver Switching

Frequency

fosc/4

KHz

TSD

Thermal Shutdown

125

150

°C

tWD

Monostable Watchdog Time

CWD = 0.22

µF (Note 4)

6.6

Reset Delay Time

CD = 0.22

µF; Fig.2 (Note 5)

15.4

RON

ON State Drain Resistance

Transistor LSD CH1 - CH2

HSD CH1 - CH2

LSD CH3

HSD CH3

SMPS

Fig 3; 4ab

1.1

0.5

2.4

1.4

0.8

1.2

Ω

SENSE

Internal Sense LOW-Pass Filter

300

500

Vref

DAC Reference Voltage

D0=D1=D2 =1 (Table 1)

DAC

DAC Resolution (3 Bit)

(See Table 1)

Vref/8

Discarge Time of Cosc

Capacitor (Minimum TON)

(Note 6)

0.4

µs

VDHS

HSD Gates Voltage Drive

IDHS

Pin 13 Overage Input Current

ISS (OUT) max

SMPS Overload Protection

Current

1.2

VDLS

Pin 21 Overage Input Voltage

VSSF

Logic VSS Fail Threshold Voltage

(Fig. 2)

2.6

4.1

VFHSD (1;2)

Internal Clamp Diode Forward

Voltage CH1/CH2

@IDS = 0.4A (Fig. 5)

1.2

VFLSD

(1AB;2AB)

Internal Clamp Diode Forward

Voltage CH1/CH2

@IDS = 0.4A (Fig. 5)

1.4

VFHSD

Internal Clamp Diode Forward

Voltage CH3

@IDS = 1A (Fig. 5)

1.1

L6280

4/26

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