L6918 datasheet(7/35 Pages) STMICROELECTRONICS

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L6918 L6918A

BOOT2

Channel 2 bootstrap capacitor pin. This pin supplies the high side driver. Connect through a

capacitor to the PHASE2 pin and through a diode to Vcc (cathode vs. boot).

UGATE2

Channel 2 high side gate driver output.

PHASE2

This pin is connected to the Source of the upper mosfet and provides the return path for the

high side driver of channel 2.

LGATE2

Channel 2 low side gate driver output.

PGND

Power ground pin. This pin is common to both sections and it must be connected through the closest

path to the low side mosfets source pins in order to reduce the noise injection into the device.

ELECTRICAL CHARACTERISTCS

(Vcc=12V±10%, TJ=0°C to 70°C unless otherwise specified)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Vcc SUPPLY CURRENT

ICC

Vcc supply current

HGATEx and LGATEx open

VCCDR=VBOOT=12V

7.5

12.5

ICCDR

VCCDR supply current

LGATEx open; VCCDR=12V

IBOOTx

Boot supply current

HGATEx open; PHASEx to

PGND

VCC=VBOOT=12V

0.5

1.5

POWER-ON

Turn-On VCC threshold

VCC Rising; VCCDR=5V

7.8

10.2

Turn-Off VCC threshold

VCC Falling; VCCDR=5V

6.5

7.5

8.5

Turn-On VCCDR Threshold

VCCDR Rising; VCC=12V

4.2

4.4

4.6

Turn-Off VCCDR Threshold

VCCDR Falling; VCC=12V

4.0

4.2

4.4

OSCILLATOR AND INHIBIT

fOSC

Initial Accuracy

OSC = OPEN

OSC = OPEN; Tj=0

°C to 125°C

278

270

300

322

330

kHz

fOSC,Rosc

Total Accuracy

RT to GND=74kΩ

450

500

550

kHz

∆Vosc

Ramp Amplitude

dMAX

Maximum duty cycle

OSC = OPEN

INH

Inhibit threshold

ISINK=5mA

0.8

0.85

0.9

REFERENCE AND DAC only for L6918A (MASTER)

VPROG_OUT Reference Voltage

Accuracy

VID0 to VID4 see Table1

-0.6

0.6

IDAC

VID pull-up Current

VIDx = GND

µA

VID pull-up Voltage

VIDx = OPEN

3.1

3.4

ERROR AMPLIFIER

DC Gain

Slew-Rate

COMP=10pF

µS

Offset

-7

DIFFERENTIAL AMPLIFIER (REMOTE BUFFER) only for L6918 (SLAVE)

DC Gain

1V/V

CMRR

Common Mode Rejection Ratio

Input Offset

FBR=1.100V to1.850V;

FBG=GND

-12

DIFFERENTIAL CURRENT SENSING

IISEN1,

IISEN2

Bias Current

ILOAD = 0%

µA

L6918 (SLAVE) PIN FUNCTION (continued)

Name

Description

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