MP4651—OFF LINE LED DRIVER

MP4651 Rev.1.0

www.MonolithicPower.com

4

1/13/2011

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

© 2011 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameter

Symbol

Condition

Min

Typ

Max

Units

Gate driver GL, GR

Gate Pull-Down

2

Ω

Gate Pull-Up

4

Ω

Output Source Current

1

A

Output Sink Current

2

A

Maximum Duty Cycle

46%

EN

EN Turn On Threshold

2

V

EN Turn Off Threshold

1

V

Internal Pull-down Resistor

60

kΩ

Brightness Dimming Control Range

PWM Full Scale

DC input burst dimming

1.1

1.2

1.3

V

PWM Logic Input Threshold

PWM dimming

1.6

1.9

2.2

V

PWM Logic Input Hysteresis

PWM dimming

0.1

V

Burst Frequency Set (BFS)

Source Current

120

140

170

µA

Lower Threshold

2.2

2.4

2.6

V

Upper Threshold

3.3

3.55

3.8

V

Supply Current

Supply Current (Enabled)

No driver output

1.5

2.5

mA

Supply Current (Disabled)

1

µA

Operating Frequency

25kΩ FSET to GND

46.5

50

53.5

kHz

Frequency Set Voltage

1.14

1.2

1.25

V

Output PWM Dimming Signal for LED (PWMOUT)

Logic High Voltage

Normal Operation

5V

6

6.5V

V

Logic Low Voltage

At Fault Condition,

25kΩ FSET to GND

0.1

0.6V

V

Output PWM Source Current

3

mA

Output PWM Sink Current

100pF on PWMOUT pin

20

mA

LED Current Feedback (FB)

Magnitude

0.57

0.6

0.63

V

Input resistance

30

kΩ

Over Voltage Protection (OVP)

Over Voltage Protection

Threshold

2.22

2.38

2.55

V