FUNCTIONAL DESCRIPTION

STB-Thermal protection

Controller drive STB pin by open drain.

When Thermal Shutdown is excited, the device

force this pin LOW.

Controller will manage STB to do a re-start.

When STB is LOW all the drivers are shut off.

Hall Sensor Bias

A regulator on chip supply a 3.3V+-10% refer-

ence on pin Bias. This regulator can supply an

output current up-to 15 mA.

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

BIAS

BIAS Output Voltage

3.25

3.75

V

Max Output Current

15

mA

H+, H-

H+ H- Input Voltage Range

0

2.5

V

Input Leakage Current

-10

+10

µA

Comparator Offset

-15

+15

mV

VHy

Comparator Hysteresys

4

15

mV

MOTOR POWER STAGE

High and Low side FET on

Resistance

I = 1.2A

2

Ω

Spindle Output Leakage

Current

100

µA

CURRENT LIMITER

Internal Reference Voltage for

current limitation

220

240

260

mV

Comparator Offset

-15

+15

mV

THERMAL PROTECTION

Shutdown temperature

130

170

°C

UNDERVOLTAGE

Undervoltage threshold (fall)

2.9

-

-

V

Undervoltage threshold (rise)

-

-

3.4

V

Undervoltage threshold (hys)

-

0.1

-

V

SYSTEM FREQUENCY

System frequency

PRS = 0

PRS = 1

10

20

20

34

MHz

MHz

SLEW RATE CONTROL

SRC Output Voltage

1.25

V

Output Current

500

µA

External Resistor on pin SRC

10

K

Ω

ISR

Input Range

0

2

V

DC ELECTRICAL CHARACTERISTICS (continued)

R PULL UP

OVER TEMP

STB

D98IN880

Figure 1.

L7203

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