ISL97635A datasheet(7/29 Pages) RENESAS

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ISL97635A

FN6564 Rev.3.00

Page 7 of 29

Sep 26, 2017

GENERAL TIMING SPECIFICATIONS (Note 4)

Minimum Setup Time Between VIN Rising above

VUVLO with EN = 1 and SMBus Communications

EN = 1, TA = +25°C, VDC capacitor < 10µF

µs

Minimum Setup Time Between EN Going High with

VIN above VUVLO and SMBus Communications

VIN > VUVLO, TA= +25°C,

VDC capacitor < 10µF

µs

Minimum Time Between VIN Rising above VUVLO

with EN = 1 to SMBus BL CTRL On

EN = 1, TA = +25°C

4.5

Minimum Time Between EN Going High with VIN

above VUVLO to SMBus BL CTRL On

VIN > VUVLO, TA = +25°C

4.5

Minimum Time for LED Output to Respond to SMBus

Data at any Levels

VIN > VUVLO, EN = 1, TA = +25°C

µs

Response Time Between Backlight CTRL Off with

Boost Not Switching to Backlight CTRL On with Boost

Switching

VIN > VUVLO, EN = 1, TA = +25°C

µs

Response Time Between Backlight CTRL On with

Boost Switching to Backlight CTRL Off with Boost

Not Switching

VIN > VUVLO, EN = 1, TA = +25°C

µs

LED Channel Short-Circuit Fault Detection to Status

VIN > VUVLO, EN = 1, TA = +25°C, LEDs

Active

6ms

VOUT-GND Short-Circuit Detection During Operation to

Status Register Data Ready

VIN > VUVLO, EN = 1, TA = +25°C, Fault FET

used

5µs

Time Between VIN Rising Above VUVLO with EN = 1

and VOUT-GND Short being Reported in Status

t10

EN = 1, VDC capacitor < 10µF, TA = +25°C,

Fault FET used.

Time Between EN Going High with VIN Above VUVLO

and a VOUT-GND Short being Reported in Status

t11

VIN > VUVLO, VDC capacitor < 10µF,

TA = +25°C, Fault FET used.

CURRENT SOURCES

Dominant Channel Current Source Headroom at IIN

VHEADROOM

ILED = 20mA, TA = +25°C

100

(Note 5)

Dominant Channel Current Sink Headroom Range at

IIN Pin

VHEADROOM_RANGE ILED = 20mA, TA = +25°C

Voltage at RSET Pin

VRSET

RS = 36.6kΩ

680

700

720

Maximum LED Current Per Channel

ILEDmax

RS = 20.9kΩ

PWM GENERATOR (Note 4)

Generated PWM Frequency

FPWM

CFPWM = 27nF, CPWMO = 220nF

200

Duty Cycle of Generated PWM (DC-to-PWM)

DPWM

VPWMO = 0.3V CFPWM = 27nF

VPWMO = 1.1V CFPWM = 27nF

Maximum PWMI Off-Time Before Shutdown

tMAX_PWM_OFF

EN/PWMI toggles

Electrical Specifications All specifications below are tested at T

A = -40°C to +85°C; VIN = 12V, EN = 5V, RSET = 36.6kΩ, unless

otherwise noted. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by

characterization and are not production tested. (Continued)

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX UNIT

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