NXP Semiconductors

9

34845

PWM input

PWMCONTROL

PWM Dimming Mode LED Current Control

• PWM = 3.3 V, fPWM = 600 Hz 10% duty;

• PWM = 3.3 V, fPWM = 600 Hz 50% duty

• PWM = 3.3 V, fPWM = 600 Hz 100% duty

9.9

49.5

-

10

50

100

10.1

50.5

-

%

tPWM_IN

Input Minimum Pulse PWM Pin (VPWM = 3.3 V)

• Start-up (Wake mode)

• Operational (Wake mode)

• Start-up (Enable mode)

• operational (Enable mode)

1.6

-

0.4

-

-

0.2

-

0.2

-

-

-

-

μs

fPWM

Input Frequency Range for PWM Pin

DC

-

100

kHz

Wake

tSHUTDOWN

Shutdown Mode Timeout

27

30

33

ms

Logic inputs (PWM)

VILL

Input Low Voltage

-0.3

-

0.5

V

VIHL

Input High Voltage

1.5

-

5.5

V

ISINK

Input Current

-1.0

-

1.0

μA

Logic inputs (EN)

VILL

Input Low Voltage

-0.3

-

0.5

V

VIHL

Input High Voltage

2.1

-

21

V

ISINK

Input Current (VEN = 12 V)

-

6.0

10

μA

Logic inputs (Wake)

VILL

Input Low Voltage

-0.3

-

0.5

V

VIHL

Input High Voltage

2.1

-

5.5

V

ISINK

Input Current

-1.0

-

1.0

μA

Table 4. Static and dynamic electrical characteristics (continued)

Characteristics noted under conditions VIN = 12 V, VOUT = 35 V, ILED = 30 mA, fS = 600 kHz, fPWM = 600 Hz - 40 °C ≤ TA ≤ 85 °C, unless

otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25 °C under nominal conditions, unless otherwise

noted.

Symbol

Characteristic

Min.

Typ.

Max.

Unit

Notes