MP8007 ― IEEE 802.3AF PD WITH 13W FLYBACK / BUCK CONVERTER

MP8007 Rev.1.0

www.MonolithicPower.com

6

6/27/2016

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© 2016 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS (continued)

VDD, CLASS, DET, T2P and RTN voltages are referred to VSS, and all other pin voltages are

referred to GND, GND and RTN are shorted together. VDD – VSS = 48V, VSS = 0V; RDET = 24.9kΩ,

RCLASS =41.2Ω. TJ = -40°C to +125°C, typical values are tested at TJ = 25C, unless otherwise

noted.

DCDC Converter Section

Parameter

Symbol Condition

Min

Typ

Max

Units

Converter Power Supply and UVLO

Converter VDD UVLO

Rising Threshold

VDD-RTN-R PG-RTN=5V, Test VDD-RTN

10.5

11.6

12.8

V

Converter VDD UVLO

Falling Threshold

VDD-RTN-F PG-RTN=5V, Test VDD-RTN

7.4

8.2

9

V

VCC Regulation

(11)

VCC

Load = 0mA to 10mA

4.8

5.4

5.9

V

VCC UVLO Rising

Threshold

(11)

VCC-R

VDD is higher than UVLO, VCC

rising

4.3

4.7

5.1

V

VCC UVLO Falling

Threshold

(11)

VCC-F

VDD is higher than UVLO, VCC

falling

4

4.5

4.8

V

Quiescent Current

IQ

VFB1 = 2.2 V, VFB2 = VDD, Test

supply from VDD to VSS

0.87

mA

Voltage Feedback

Respect to GND, TJ = 25°C

1.94

1.99

2.04

V

FB1 Reference Voltage

VREF1

Respect to GND, TJ = -40°C to

+125°C

1.93

1.99

2.05

V

FB1 Leakage Current

IFB1

Respect to GND, VFB1 = 2V

10

50

nA

Flyback Mode DCM Detect

Threshold on FB1

VDCM1

Respect to GND

25

50

75

mV

FB1 Open-circuit Threshold

VFB1OPEN

-90

-60

-20

mV

FB1 OVP Threshold

VFB1OVP

120%

125%

130%

VREF1

Minimum Diode Conduction

Time for FB1 Sample

TSAMPLE

1.4

2.2

3

μs

Respect to VDD, TJ = 25°C

-1.955

-1.88

-1.805

V

FB2 Reference Voltage

VREF2

Respect to VDD, TJ = -40°C to

+125°C

-1.96

-1.88

-1.8

V

FB2 Leakage Current

IFB2

Respect to VDD, VFB2 = -2V

10

50

nA

Buck Mode DCM Detect

Threshold on SW

VDCM2

Respect to VDD

0

0.14

V

Switching Power Device

On Resistance

RON-SW

VCC = 5.4V

0.8

Ω

Current Sense

Switching Current Limit

ILIMIT

RILIM = 53.6kΩ, L = 47μH

1.85

2.05

2.25

A

Switching Current Leading-

edge Blanking Time

TLEB

450

ns