SC441D

9

Typical Characteristics (continued)

OTP and OTP Recovery

SW

SS

Vout

Vin

Testing condition: VIN=12V, 25 , LEDs=10S4P@150/CH, 32Vout

VOUT

(20V/DIV)

VSW

(20V/DIV)

VIN=2V

VSS

(2V/DIV)

OTP and OTP Recovery

Time (40mS/DIV)

Conditions: VIN = 2V,

Output = 32V / 50mA x 4 LED strings

Conditions: VIN = 2V, IO has one LED short circuit,

Output = 32V / 50mA x 4 LED strings

Time (0mS/DIV)

LED Short Circuit Protection

Conditions: VIN = 2V,

Output = 32V / 50mA x 4 LED strings

Time (20mS/DIV)

LED Open circuit Protection

Time (2mS/DIV)

PWM Dimming

Conditions: VIN = 2V, IO LED String is open circuit,

Output = 32V / 50mA x 3 LED strings

VOUT

(20V/DIV)

IO2

(V/DIV)

VIN

(0V/DIV)

IO

(2V/DIV)

LED Short Circuit Protection

IO_2

IO_1

Vout

Vin

Testing condition: VIN=12V, 25 , LEDs=10S4P@150/CH, 32Vout, IO1

Short

LED Open Circuit Protection

IO_2

IO_1

Vout

Vin

Testing condition: VIN=12V, 25 , LEDs=10S4P@150/CH, 32Vout, IO1

Open

VOUT

(20V/DIV)

IO2

(0V/DIV)

VIN

(5V/DIV)

IO

(2V/DIV)

PWM

(5V/DIV)

IO

(5V/DIV)

VIN=2V

SW

(20V/DIV)

PWM Dimming

SW

PWM

IO1

Vin

Testing condition: VIN=12V, 25 , LEDs=10S4P@150/CH, 32Vout, IO1

Open, Dimming 200Hz, 50% Duty