SC656ULTRT datasheet(9/17 Pages) SEMTECH

Part #	SC656ULTRT

Description	Backlight Driver for 7 LEDs with Charge Pump and PWM Control

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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SC656

9

Typical Characteristics (continued)

Start-up — 0% to 50%

I

BL (0.0mA/div)

V

IN = 3.7V, 0 to 50% duty cycle, RISET = 4.99kΩ, fPWM = 32kHz

Time (200m��i��

��i��

V

PWM (2V/div)

0mA—

0mA

50%

0V—

Start-up — 0% to 100%

I

BL (0.0mA/div)

V

IN = 3.7V, 0 to 00% duty cycle, RISET = 4.99kΩ, no PWM

Time (200m��i��

��i��

V

PWM (2V/div)

0mA—

20mA

00%

0V—

I

BL Settling Time — 50% to 100%

I

BL Settling Time — 100% to 50%

I

BL (0.0mA/div)

V

IN = 3.7V, RISET = 4.99kΩ, fPWM = 32kHz

Time (200m��i��

��i��

V

PWM (2V/div)

0mA—

20mA

50%

0V—

0mA

00%

I

BL (0.0mA/div)

V

IN = 3.7V, RISET = 4.99kΩ, fPWM = 32kHz

Time (200m��i��

V

PWM (2V/div)

0mA—

20mA

50%

0V—

0mA

00%

DC Backlight Current — 32kHz PWM

I

BL (0.0mA/div)

V

IN = 3.7V, 50% duty cycle, RISET = 4.99kΩ, IBL = 0mA

Time (20μ��i��

��i��

V

PWM (2V/div)

0mA—

0V—

DC Backlight Current — 200Hz PWM

I

BL (0.0mA/div)

V

IN = 3.7V, 50% duty cycle, RISET = 4.99kΩ, IBL = 0mA

Time (1m��i��

��i��

V

PWM (2V/div)

0mA—

0V—

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