MP3308 – STEP-UP WHITE LED DRIVER WITH DUAL PWM DIMMING INPUT CONTROL

MP3308 Rev. 1.02

www.MonolithicPower.com

3

7/19/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameters

Symbol

Condition

Min

Typ

Max Units

Operating Input Voltage

2.5

6

V

Supply Current (Shutdown)

25

30

µA

Supply Current (Quiescent)

860

µA

Switching Frequency

1.7

2.2

2.7

MHz

Maximum Duty Cycle

90

%

Under Voltage Lockout

2.1

2.3

V

Under Voltage Lockout Hysteresis

30

mV

Over-Voltage Protection Threshold

0.9

V

Enable and Dimming

EN/PWMIX OFF Threshold

0.4

V

EN/PWMIX ON Threshold

1.8

V

True PWM Dimming Duty Accuracy

D_PWMIA=D_PWMIB=70%

±3

%

Feedback

ISET Voltage

185

200

215

mV

ISET Input Bias Current

-600

-300

nA

Output Switch

SW On-Resistance

0.4

Ω

SW Current Limit

Duty Cycle = 60%

1.33

A

Thermal Shutdown

150

°C

LED Switch ON-Resistance (M2 in

the functional block diagram)

0.8

Ω