L9907 datasheet(25/49 Pages) STMICROELECTRONICS

25 / 49 page

DS11800 Rev 5

25/49

L9907

Electrical specifications

3.5.7

Current sense amplifier

The device is operated in the specified operating range, unless otherwise specified



(VCC = 3.20 V to 5.25 V, VB = 4.2 V to 54 V, Tj = -40 °C to 150 °C).

Note:

Table 20 is referred to bidirectional current measurement (shunt resistors on the phase of

the motor).

Table 19. Gate voltage monitoring

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

VG UV HS

Undervoltage threshold for

HS gate driver. It monitors the

voltage difference between

boost output pin BST_C and

HS FET drain connection

VDH

V(BST_C)-V(VDH)

4.6

6.8

VG UV LS

Undervoltage threshold for

LS gate driver. It monitors the

voltage difference between

low-side gate driver supply

pin VCAP and LS FET 3

source connection SLS3

V(VCAP)-V(SLS3)

7.4

8.2

9.0

tUV VG

Undervoltage filter time

(guaranteed through

scan)

3.5

µs

Table 20. Phase current sense amplifier (SPI select: Offx=1, where x=1,2)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

Vin_off

Differential input offset

voltage

--5

Vio_step

Calibration step of

Differential input offset

voltage(1)

-0.5

1.5

VICM

Common mode input

voltage range

Operating

-2

VB+4

Transient (t < 1 µs)

-7

VB+20

Vobias

Output bias voltage

V(Isx+) -V(Isx-) = 0

0.5*Vcc-

0.5(2)

0.5*Vcc

0.5*Vcc+

0.5(3)

IOD

Input offset drift (3)

Vcc = 5V

µV/°C

CMRR

Input common mode

rejection ratio

-70

ISX+(4)

Positive input pin current

Gain = 10 to 100,



VCC = 5 V

-200

µA

ISX-(4)

Negative input pin current

Gain = 10 to 100,



VCC = 5 V

-1

BST_C PSRR

Rejection ratio for Boost

output power supply to

amplifier Input

V(BST_C) / V(IBx)

f=350KHz

40(5)

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