L9907 datasheet(23/49 Pages) STMICROELECTRONICS

23 / 49 page

DS11800 Rev 5

23/49

L9907

Electrical specifications

3.5.6

MOSFET drivers

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).

ILIM

Boost switch current limit

250

500

Lbst

Boost regulator inductance

µH

Cbst

Boost regulator capacitance

µF

fSW_BST

Boost regulator switching frequency

280

350

420

kHz

BST_HOV Boost over voltage threshold

BST_HOV

_HYST

Boost over voltage hysteresis

Tbst

Boost regulator start-up time (design info) Cbst = 2 µF

VCAP

Supply voltage for the LS gate driver

ICAP = 25 mA

V(SLS3)

+8.5

V(SLS3)

+15

ICAP

Output current for the voltage regulator

for the LS

VB = 14 V

-65

-20

VCBSX

Bootstrap capacitor voltage



V(CBSx)-V(SHSx)

V(SHSx) = 14 V,

ICBSX = -6 mA

8.5

ICBSX

Bootstrap capacitor charge current at pin

CBSx

-6

Table 16. Boost converter electrical characteristics (continued)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

Table 17. MOSFET drivers electrical characteristics

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

VGS(L)

Low level output voltage

VGx-VSx @ I= 50 mA

100

250

VGS(H)

High level output voltage

VGx-VSx @ I= -5 mA

7.5

IGxx_1

Turn-on/off current with GCR = 1

kΩ (1)

IG_1,IG_0 = 11 100% Imax

450

600

750

IG_1,IG_0 = 10 75% Imax

337

450

563

IG_1,IG_0 = 01 50% Imax

225

300

375

IG_1,IG_0 = 00 25% Imax

112

150

188

IGxx_2

Turn-on/off current with GCR = 6

kΩ

IG_1,IG_0 = 11 100% Imax

100

125

IG_1,IG_0 = 10 75% Imax

IG_1,IG_0 = 01 50% Imax

IG_1,IG_0 = 00 25% Imax

ISLSx(2)

Low-side driver SLS output current GCR = 1 kΩ, PWM signals low

3.3

ISHSx(2)

High-side driver SHS output current GCR = 1 kΩ, PWM signals low

-3.3

GCR_STG Gate driver over current protection

880

GCR_OL Gate driver under current protection -

kΩ

RGxxON

ON-resistance of SINK stage

GCR = 1 kΩ, IG_1,IG_0=11, I =

25 mA injected into Gate pin

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