PM8800ATR datasheet(12/35 Pages) STMICROELECTRONICS

номер детали	PM8800ATR

подробное описание детали	Integrated IEEE 802.3af compliant PoE-PD interface and PWM controller with support of external source

PDF	35 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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12 / 35 page

Electrical specifications

PM8800A

12/35

Table 6.

Electrical characteristics - SMPS section

(VIN = 48 V, VCC = open, TA = 25 °C unless otherwise specified).

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

Oscillator

fosc

Free running

RT = open

85 (1)

100

115 (1)

kHz

Frequency

programmability

RT = 88 kΩ

210 (1)

240

270 (1)

kHz

RT = 33 kΩ

385 (1)

440

495 (1)

kHz

Ext. synch threshold

50 ns pulse

2.8

Error amplifier

VEA

EA input voltage

FB = COMP

1.21 (1)

1.25

1.29 (1)

GBW

Gain bandwidth

Guaranteed by design

MHz

DC gain

Guaranteed by design

COMP

Sink current capability

COMP to GND

-8 (1)

-15

Soft start

ISS

Soft start current

Charging

7 (1)

13 (1)

µA

Discharging

-7 (1)

-10

-13 (1)

µA

SS voltage

After soft start

2.1 (1)

2.3

2.5 (1)

Current limit

Delay to output

Guaranteed by design

Cycle by cycle current

limit threshold voltage

0.44 (1)

0.50

0.56 (1)

Leading edge blanking

time

PWM comparator

Delay to output

Guaranteed by design

Minimum duty cycle

0 (1)

Maximum duty cycle

83 (1)

COMP to PWM gain

Guaranteed by design

0.5

Output driver

Output high

IGD = 100 mA;

guaranteed by design

Vcc-0.4 Vcc-0.7

Output low

IGD = -100 mA

0.25

0.5

Fall time

CLOAD = 3.3 nF

Rise time

CLOAD = 3.3 nF

Peak source current

CLOAD = 3.3 nF;

guaranteed by design

800

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