SC5014 Ver la hoja de datos (PDF) - Semtech Corporation

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SC5014

High Efficiency 4-Channel HB LED Driver with I2C Interface and Phase-Shifted PWM Dimming

Semtech Corporation 

LED Current Fade In/Out (Logarithmic)

Typical Characteristics (continued)

Testing condition: VIN=12V, 25к, LEDs=10S4P@120/CH, PWM indirect

LEmDode;CPWuMr=r10eKHnz,tPWFMaI odn e/ offI,ndu/tyO=0%utot1(00L%ogarithmic)

SC5014

Fade in/Fade out (Linear)

Testing condition: VIN=12V, 25к, LEDs=10S4P@120/CH, PWM indirect

LED Current Fade In/Out mode; PWM=10KHz, PWMI on / off, duty=0% to 100% (Linear)

PWMI

PWMI

PWMI

PWMI

5V/div.

5V/div.

VIO1

V_IO4

VIO1

V_IO4

10V/div.

10V/div.

Vout

Vout

VOUT

20V/div.

VOUT

20V/div.

IOUT

200mA/div.

Line Transient Response

Iout

Time (100ms/div)

Line Transient Response Test condition: 8Vin to 20Vin, 10S4P@120mA per string, RFSET=100KӨ,

Vin RT=1us

100% dimming, 120mA/CH X 4

20V

PWMI

VIN

10V/div.

8V

VOUT

Vout

1V/div.

VIO1

V_IO4

1V/div.

IL

3A/div.

IL

Load Transient Response

Time (4us/div)

Load Transient Response

PWMI(10KTeHstzin)g=RcF2oSn%EdTit=tio1on0:09VK8IHNz%=,1P2,WVV,M2IIN5=к1=0,K1L,E2DDuVst=,y=11022S%40Ptmo@91A82%0/mCAH/CHX, 4

Fading disabled

PWMI

PWMI

5V/div.

Vout

VOUT

200mV/div.

Iout

IOUT

200mA/div.

Time (100us/div)

IOUT

200mA/div.

LEDs Open-circuit Protection Iout

Time (100ms/div)

LED Open Circuit Protection Testing condition: VIN=12V, 25к, LEDs=10S4P@120mA/CH, CH4 open,

RFSET=100KHz, ROVP2=357KӨ

Starting with one LED string open-circuit

EN

VEN

5V/div.

FLT

FLT

5V/div.

Vout

VOUT

20V/div.

Iout

IOUT

200mA/div.

Load Transient Response

Time (20ms/div)

Load Transient Response PWMI(10KTeHstzin)g=RcF9oSn8Ed%Tit=io1tn0o:0VK2IHNz%=,1P2,WVV,M2IIN5=к1=0,K1L,E2DDuVst=,y=11092S8%40Pm@to1A22%0/mCAH/CHX, 4

Fading disabled

PWMI

5V/div.

PWMI

VOUT

200mV/div.

IOUT

200mA/div.

Time (100ms/div)

Vout

Iout



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