AT9919 datasheet(5/16 Pages) MICROCHIP

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 2016 Microchip Technology Inc.

DS20005595A-page 5

AT9919

GATE DRIVER

GATE Current, Source

IGATE

0.3

0.5

—

VGATE = GND (Note 2)

GATE Current, Sink

0.7

—

VGATE = VDD (Note 2)

GATE Output Rise Time

TRISE

—

CGATE = 2 nF

GATE Output Fall Time

TFALL

—

CGATE = 2 nF

GATE High Output Voltage

VGATE(HI)

VDD – 0.5

—

IGATE = 10 mA

GATE Low Output Voltage

VGATE(LO)

—

0.5

IGATE = –10 mA

OVERTEMPERATURE PROTECTION

Over Temperature Trip Limit

TOT

128

140

—

ºC

Note 2

Temperature Hysteresis

∆THYST

—

ºC

Note 2

ANALOG CONTROL OF PWM DIMMING

Dimming Frequency

fRAMP

130

—

300

CRAMP = 47 nF

550

—

1250

CRAMP = 10 nF

RAMP Threshold, Low

VLOW

—

0.1

—

RAMP Threshold, High

VHIGH

1.8

—

2.1

ADIM Offset Voltage

VOS

–35

—

+35

TEMPERATURE SPECIFICATIONS

Parameter

Sym.

Min.

Typ.

Max.

Unit

Conditions

TEMPERATURE RANGE

Operating Temperature

–40

—

+125

°C

Junction Temperature

—

+150

°C

Storage Temperature

–65

—

+150

°C

PACKAGE THERMAL RESISTANCE

8-lead DFN

JA

—

+37

—

°C/W

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Specifications: VIN = 12V, VDIM = VDD, VRAMP = GND, CVDD = 1 µF, RCS = 0.5Ω, TA = TJ = –40ºC to

+125ºC (Note 1) unless otherwise noted.

Parameter

Sym.

Min.

Typ. Max.

Unit

Conditions

Note 1:

Limits obtained by design and characterization.

2: For design guidance only

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