AP3152

120mA HIGH EFFICIENCY WHITE LED DRIVER

AP3152 Rev. 3

5 of 13

FEBRUARY 2009

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Electrical Characteristics

Symbol

Description

Conditions

Min

Typ.

Max

Units

Quiescent Current

1X Mode

Fosc=1.2MHz,

SDI=HIGH, no load

1.2

mA

Shutdown Current

SDI = 0

-1

1

µA

(Note 4)

-10

10

%

Current Matching

(Note 5)

5

%

Soft-start Time

1

ms

Switching Clock Frequency

0.6/1.2/1.8

MHz

Spread Spectrum

Enabled

+10

%

SDI Threshold Low

0.4

V

SDI Threshold High

1.6

V

SDI Low Time

0.05

50

µs

SDI High Time

0.05

50

µs

PWM Frequency (Range 1)

0.2

1.5

KHz

PWM Frequency (Range 2)

20

30

KHz

PWM Signal Period

1/

µs

PWM Signal Low (LED off)

1

µs

PWM Signal High (LED on)

1

µs

Chip Disable (held low)

PWM

65

100

ms

No PWM

512

800

µs

Interval between SDI

sequences (held high)

PWM

65

100

ms

No PWM

512

800

µs

SDI Input Leakage

-1

1

µA

Current

500

mA

Thermal Shutdown

Temperature

+150

°C

θ

JA

Thermal Resistance1 –

Junction to Ambient

DFN3030-12

(Note 6)

160

°C/W

θ

JC

Maximum Thermal

Resistance1 –

Junction to Case

DFN3030-12

(Note 6)

21

°C/W

Notes:

4. Determined by the average current levels of all active channels.

5. Defined as the deviation of any sink current from the average of all active current channels.