MP4050A – NON-ISOLATED, HIGH-BRIGHTNESS LED DRIVER, WITH ENHANCED THERMAL FEATURE

MP4050A Rev. 1.01

www.MonolithicPower.com

4

1/14/2016

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ELECTRICAL CHARACTERISTICS

guaranteed by characterization.

Parameter

Symbol

Condition

Min

Typ

Max

Units

Start-Up Current Source (DRAIN)

Internal Regulator Supply Current

3.8

5

6.1

mA

Leakage Current from DRAIN

14

22

μA

Supply Voltage Management (VCC)

VCC Increasing Level: Internal

Regulator Stops & IC Starts Working

VCC Rising Edge

4.00

4.35

4.70

V

VCC Normal Level

Normal Operation

4.25

V

VCC Decreasing Level: Internal

Regulator Turn-On

VCC Falling Edge

3.85

4.15

4.50

V

VCC Hysteresis: Regulator On/Off

0.11

0.20

0.28

V

VCC Decreasing Level: IC Stops

VCC Falling Edge

3

3.4

3.8

V

VCC Hysteresis: Regulator Off & IC

Stops Working

0.93

1.25

1.6

V

VCC Decreasing Level: Protection

Phase Ends

VCC Falling Edge

1.9

2.35

2.8

V

Internal IC Consumption

Duty=84%

350

425

μA

Internal IC Consumption at Latch-Off

Phase

18

32

μA

Internal MOSFET (DRAIN to SOURCE)

Breakdown Voltage

500

V

8

12

Ω

DRAIN SOURCE On-State Resistance

8

12

Ω

Current Sampling Management (SOURCE)

Peak Current Limit at Normal

Operation

0.4

0.46

0.52

V

Leading Edge Blanking

130

200

310

ns

Feedback Threshold: Turn-On High-

Side MOSFET

Regulate the Average

Current

0.187 0.196 0.205

V

Normal Operation

3.4

4.7

6.2

μs

The 1

Cycles at Start-Up

×3.5

μs

The 2

Cycles at Start-Up

×2

μs

Minimum Off-Time Limitation

The 3

Cycles at Start-Up

×1.2

μs

Maximum On-Time Limitation

16

25

37

μs