PM8805 datasheet(18/48 Pages) STMICROELECTRONICS

Nome de Peças	PM8805

Descrição Electrónicos	IEEE 802.3bt PoE-PD interface with embedded dual active bridge

PDF	48 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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18 / 48 page

Electrical specifications

PM8805

18/48

DS12813 Rev 2

PGD signal (open drain)

PGD_low

Low state

Sinking 1mA

200

PGD delay

High state

Measured from UVLO release

100

T0, T1, T2 signals (open drain)

Pull down resistance

100

VB regulation(3)

VB_def

Default value

4.75

5.25

VB_Ilim

Current limit

Thermal shutdown(4)

OT_thsd

Shutdown temp

Always on

160

°C

OT_hyst

Shutdown hyst

°C

Device current consumption

Idd_off

VDD quiescent current

VDD>VUVLO_R, VB=5V

1.5

2.0

1. Bridge inputs are IN12, IN36, IN45, IN78, and the relevant ground pins are GND21, GND36, GND45, GND78. PoE inputs

are IN12 vs IN36 and IN45 vs. IN78.

2. The charge pump current Icp is intended for charging the VCP capacitor only.

3. The VB regulator is intended for internal use only as pull-up supply of PM8805 I/O signals; any additional external current

has to be limited within the specified max. current limit.

4. Guaranteed by design or characterization.

Table 6. Electrical characteristics (continued)

Symbol

Parameter

Test conditions

Min.

Typ.

Max. Unit

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