ISL97694AIRT-EVZ中文資料Intersil數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

The ISL97692, ISL97693, ISL97694A are Intersil’s highly

integrated 4- and 6-channel LED drivers for display

backlighting. These parts maximize battery life by featuring

only 1mA quiescent current, and by operating down to 2.4V

input voltage, with no need for higher voltage supplies.

The ISL97692 has four channels and provides 8-bit PWM

dimming with adjustable dimming frequency up to 30kHz. The

ISL97693 has six channels with Direct PWM dimming control.

The ISL97694A has 6 channels and provides 8-, 10-, or 12-bit

PWM dimming with adjustable dimming frequency up to

30kHz, 7.5kHz, or 1.875kHz, respectively, controlled with I2C

or PWM input.

The ISL97692 and ISL97694A feature phase shifting that may

be enabled optionally, providing an optimized phase delay

between channels. In the ISL97692 and ISL97694A, phase

shifting can multiply the effective dimming frequency by four

and six allowing above audio-band PWM dimming with 10-bit

dimming resolution.

The ISL97692, ISL97693, ISL97694A employ adaptive boost

architecture, which keeps the headroom voltage as low as

possible to maximize battery life while allowing ultra low

dimming duty cycle as low as 0.005 at 100Hz dimming

frequency in Direct PWM mode.

The ISL97692, ISL97693, ISL97694A incorporate extensive

protection functions including string open and short circuit

detections, OVP, and OTP.

The ISL97692, ISL97693 are offered in the 16 Ld 3x3mm TQFN

package, and a 16 bump 1.7x1.7mm WLCSP for the ISL97692.

The ISL97694A is offered in the 20 Ld 3x4mm TQFN package. All

parts operate in ambient temperature range of -40°C to +85°C.

Features

? 2.4V minimum input voltage, supports single cell applications

? 4 channels, up to 40mA each (ISL97692) or 6 channels, up to

30mA each (ISL97693, ISL97694A)

? 90 efficient at 6P5S, 3.7V and 20mA (ISL97693, ISL97694A)

? Low 0.8mA quiescent current

? PWM dimming control with internally generated clock

- 8-bit resolution with adjustable dimming frequency up to

30kHz (ISL97692, ISL97694A)

- 12-bit resolution with adjustable dimming frequency up to

1.875kHz (ISL97694A)

- Optional automatic channel phase shift (ISL97692,

ISL97694A)

- Linear dimming from 0.025~100 up to 5kHz or

0.4~100 up to 30kHz (ISL97692, ISL97694A)

? Direct PWM dimming with 0.005 minimum duty cycle at

100Hz

? ±2.5 output current matching

? Adjustable switching frequency from 400kHz to 1.5MHz

Applications

? Tablet, Notebook PC and Smart Phone Displays LED

Backlighting