LTC4212 Просмотр технического описания (PDF) - Linear Technology

Номер в каталоге

Компоненты Описание

производитель

LTC4212

Hot Swap Controller with Power-Up Timeout

Linear Technology 

LTC4212

PI FU CTIO S

FAULT (Pin 10): Open Drain FAULT Output or External

FAULT Input. If the FAST COMP, SLOW COMP or the

power good circuit trips the ECB, the FAULT pin is latched

low. The FAULT pin is an open drain output and is typically

connected by a 10k pull-up resistor to VCC. An external

circuit can also trip the ECB by driving FAULT below

1.236V (typical).

BLOCK DIAGRA

VCC 9

SENSE 8

GATE 7

UVLO

TIMER

2

VCC

2µA

tTIMER

0.2V +

COMP3

–

M6

+

COMP4

VREF –

NORMAL

1.316V –

COMP1

ON

+

1

–

COMP2

0.455V +

1.5µs

DELAY

200µA

GATE

PULLDOWN

10µs

RESET

ECB

120µs

+– 50mV

+– 150mV

COMP7

0.2V

Z1

VZ (TYP) = 12V

VCC

10µA CHARGE

PUMP

Z2

VZ (TYP) = 28V

SLOW

COMP

FAST

COMP

M3

200µA

10µA

18µS

GLITCH FILTER

500ns

DELAY

CB

TRIPS ON LOW

OR UVLO >10µs

START-UP

CURRENT

GATE

REGULATOR CHARGING

VREF

COMP6

LOGIC

CB TRIPS

FAULT

10

M2

GND

5

VALID

GLITCH

DISABLE

GLITCH

FILTER

DISABLE

TIMER

COMP5

5µA

COMP8

COMP9

5µA

M10

VREF

M5

VREF

M9

0.95V

M8

0.65V

M12

M1

5µA

VREF =

1.236V

0.95V

BG

0.2V

0.65V

4 PGF

6 PGI

3 PGT

4212 BD

4212f

9

Share Link: