MP8005DF-LF-Z Datasheet MP8005DF-LF-Z | P4-P6

MP8005 – IEEE 802.3af PoE POWERED DEVICE CONTROLLER

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ELECTRICAL CHARACTERISTICS (continued)

V

DD

= 48V, all voltages with respect to V

SS

, V

SS

= 0V; R

DET

= 26.1kΩ

,

R

CLASS

= 4.42KΩ

,

R

ILIM

= 178kΩ, T

A

= 25°C, unless otherwise noted.

Parameter Symbol Condition Min Typ Max Units

Detection

Detection on

V

DET_ON

V

DD

=V

RTN

=V

PG

=1.9V 1.9 V

Detection off

V

DET_OFF

V

DD

=V

RTN

=V

PG

=11V 11 V

Detection on/off

Hysteresis

V

DET_H

Falling below 11V on Threshold 0.2 V

DET Leakage Current V

DET_LK

V

DET

=V

VDD

=57V, Measure IDET 0.1 5 μA

V

DD

= 3V 135 140 145 A

Detection Current I

DET

V

VDD

=V

RTN

R

DET

=26.1k,

Measure

I

VDD

+I

RTN

+I

DET

V

DD

= 10.1V 405 420 435 A

Classification

V

CLASS

Output Voltage V

CL

Over a Load Range of 1mA to 41.2 mA 9.6 10 10.3 V

R

CLASS

=4420, 13V

VDD

21V

(guar by V

CL

)

2.2. 2.4 2.8

R

CLASS

=953, 13V

VDD

21V

(guar by V

CL

)

10.3 10.6 11.3

R

CLASS

=549, 13V

VDD

21V

(guar by V

CL

)

17.7 18.3 19.5

R

CLASS

=357, 13V

VDD

21V

(guar by V

CL

)

27.1 28 29.5

Classification Current I

CLASS

R

CLASS

=255, 13V

VDD

21V

(guar by V

CL

)

38 39.4 41.2

mA

Classification Lower

Threshold

V

CL_ON

Regulator Turns on, V

VDD

Rising 10.2 11.3 13 V

Classification Upper

Threshold

V

CU_OFF

Regulator Turns off, V

VDD

Rising 21 21.9 23 V

V

CU_H

Hysteresis 0.4 V

IC Supply Current during

Classification

I

IN_CLASS

V

DD

= 17.5V, CLASS Floating, RTN Tied

to VSS

300 500 A

Leakage Current I

LEAKAGE

V

CLASS

= 0 V, V

VDD

= 57V 1 A

Pass Device

On Resistance R

DS(ON)

I

RTN=

300mA 1.0 1.2 

Leakage Current

I

SW_LK

V

VDD

=V

RTN

=57V 1 15 A

Current Limit I

LIMIT

V

RTN

=1V 360 400 460 mA

Inrush Limit I

INRUSH

V

RTN

=2V, R

ILM

=178k 120 150 180 mA

Inrush Current

Termination

V

RTN

Falling, R

IPEAK

= 178k, Inrush

StateÆNormal Operation

85 90 100 %

MP8005 – IEEE 802.3af PoE POWERED DEVICE CONTROLLER

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9/26/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

ELECTRICAL CHARACTERISTICS (continued)

V

DD

= 48V, all voltages with respect to V

SS

, V

SS

= 0V; R

DET

= 26.1kΩ

,

R

CLASS

= 4.42KΩ

,

R

ILIM

= 178kΩ, T

A

= 25°C, unless otherwise noted.

Parameter Symbol Condition Min Typ Max Units

PG

Latchoff Voltage

Threshold Rising

V

RTN

Rising

(5)

9.5 10 10.5 V

Latchoff Voltage

Threshold Falling

V

RTN

Falling 1.2 V

PG Deglitch Delay Rising and Falling PDG

(5)

75 150 225 s

Output Low Voltage I

PG

= 400 A 0.12 0.4 V

Leakage Current V

PG

= 57 V, V

RTN

= 0 V 0.1 1 A

UVLO

Voltage at V

VDD

V

VDD

Rising (including 1.4V Diode drop) 38 40 42 V

V

VDD

Falling (including 1.4V Diode drop) 30.2 31.5 32.8

Thermal Shutdown

Thermal Counter Reset

Voltage

VCRST Must Drop below Classification Range 10.8 V

Bias Current

Operating Current I

Q

(VDD)

VDD = 48V, Pins 5, 6 Floating

Measure IVDD

240 450 A

Notes:

5) Guaranteed by Design.

MP8005 – IEEE 802.3af PoE POWERED DEVICE CONTROLLER

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PIN FUNCTIONS

Pin # Name Description

1 VCC 10V Shunt Supply Voltage used for the switching regulator controller

2 MAINGATE Output drive to the Main Gate

3 SYNCGATE Output drive to the Synchronous Gate

4 CSS Soft-start ramping capacitor

5 ENABLE On/Off control input to the switching regulator

6 ILIM Startup I

LIM

Value Setting Resistor terminal (optional at this point).

7 CLASS Classification Resistor terminal.

8 DET 26.1k Detection Resistor terminal

9 VSS Ground return to the Ethernet negative supply.

10 No Connection

11 No Connection

12 RTN Powered Device Negative Power Terminal.

13 RTN Powered Device Negative Power Terminal.

14 PG Active low power good indication.

15 VDD Positive Power Supply Terminal for the Ethernet PD control function.

16 COMP Switching regulator compensation terminal.

17 VFB Switching regulator voltage feedback terminal.

18 RDELAY

Resistor programming for setting the delay from the Sync gate going low to the Main gate

going high.

19 ISENSE Main Switch current sensing terminal.

20 AGND Switching regulator controller ground return; Returns to the RTN pin.

MP8005DF-LF-Z

MP8005DF-LF-Z

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