SC668 datasheet(8/46 Pages) SEMTECH

Part #	SC668

Description	8 LED Light Management Unit Automatic Dropout Prevention , Ambient Light Sense Input, PWM Dimming, and 4 LDOs

PDF	46 Pages

Scroll/Zoom	100%

Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

Logo

8 / 46 page

SC668

Typical Characteristics — Backlights (continued)

Group #1 Blink Function (25mA)

— 25mA

Time (400ms/div)

BL (10mA/div)

Start time = 32ms, target time = 3072ms

0mA

Group #1 Breathe Function (20mA to 0.5mA)

— 20mA

Time (1000ms/div)

BL (10mA/div)

Breathe rate = 24ms, start time = 32ms, target time = 1024ms

— 0.5mA

Bank #1 with ADP (rate = 256µs)

0mA

Time (10ms/div)

BL (10mA/div)

IN (500mV/div)

Battery transient condition: 100Hz, 12.5% duty cycle

15mA

3.40V

3.05V

15mA

11mA

Backlight with ADP (rate = 4ms)

Time (20ms/div)

BL (10mA/div)

IN (500mV/div)

Battery transient condition: 50Hz, 30% duty cycle

15mA

3.32V

2.98V

8mA

0mA —

Backlight Dimming with ALS and Fade

Time (1000ms/div)

BL (10mA/div)

ADI (1V/div)

IN = 3.7V, VLDO4 = 2.8V, ADRISE = B0h, ADFALL = 80h, 4ms fade rate

10mA

0.5mA

0V —

0.5mA

2.8V —

ADC reference

brighter

dimmer

ambient

lighting

SC668 Datasheet(PDF) 8 Page - Semtech Corporation

SC668 Datasheet(HTML) 8 Page - Semtech Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

Datasheet Download

Link URL