MP2487 datasheet(3/13 Pages) MPS

3 / 13 page

MP2487 – 55V, 1A, HIGH-POWER LEDS DRIVER

MP2487 Rev. 1.0

www.MonolithicPower.com

9/22/2011

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

ELECTRICAL CHARACTERISTICS

VIN = 12V, VEN = 2.5V, VCOMP = 1.4V, TA= +25°C, unless otherwise noted.

Specifications over temperature are guaranteed by design and characterization.

Parameter

Symbol Condition

Min

Typ

Max

Units

Feedback Voltage

VFB

4.5V < VIN < 55V

188

200

212

Upper Switch On Resistance

(5)

RDS(ON) VBST – VSW = 5V

220

mΩ

Upper Switch Leakage

VEN = 0V, VSW = 0V

0.1

μA

Current Limit

At Maximum Duty Cycle

1.3

1.5

Error Amp Voltage Gain

AVEA

400

V/V

Error Amp Transconductance

GEA

ICOMP = ±3µA

350

µA/V

Error Amp Min Source current

VFB = 175mV

µA

Error Amp Min Sink current

VFB = 225mV

-10

µA

VIN UVLO Threshold

VIN rising

2.7

3.0

3.3

VIN UVLO Hysteresis

0.4

Soft-Start Time

(5)

20mV < VFB < 190mV

0.18

Oscillator Frequency

RFREQ = 495kΩ

150

200

250

kHz

Minimum Switch On Time

(5)

100

Shutdown Supply Current

VEN < 0.3V

µA

Quiescent Supply Current

No load, VFB = 240mV

130

µA

Thermal Shutdown

Hysteresis = 20

°C

150

°C

Minimum Off Time

(5)

100

Minimum On Time

(5)

100

EN Up Threshold

1.3

1.5

1.7

EN Threshold Hysteresis

300

Note:

5) Guaranteed by design.

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