LTC4221IGN datasheet(12/28 Pages) LINER

Numer części	LTC4221IGN

Szczegółowy opis	Dual Hot Swap Controller/ Power Sequencer with Dual Speed, Dual Level Fault Protection

PDF	28 Pages

Scroll/Zoom	100%

Producent	LINER [Linear Technology]

Strona internetowa	http://www.linear.com

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12 / 28 page

LTC4221

4221f

OPERATIO

VCCn

TIMER

FAULT

FILTER

ON1

VON(OFF) + ∆VON(OFFHYST)

VON(RESET) + ∆VON(RESETHYST)

VON(OFF)

VGATE(OV)

VON(OFF) + ∆VON(OFFHYST)

ON2

GATE1

GATE2

SENSE1

SENSE2

VOUT1

VOUT2

PWRGD1

PWRGD2

UVLO

OFF

INITIAL TIMING

RESET

100µA

VCCn(UVL)

VCCn CLEARS VCCn(UVL)

ELECTRONIC CIRCUIT BREAKER ARMED, CHECK FILTER < VFILTER(TH),

FAULT > VFAULT(TH) + ∆VFAULT(HYST)

ON1 > VON(RESET) + ∆VON(RESETHYST)

CHANNEL 1 SLOW COMPARATOR ARMED

ON2 > VON(OFF), + ∆VON(OFFHYST),

CHECK GATE < VGATE(OV), TIMER < 0.4V

ON1 > VON(OFF) + ∆VON(OFFHYST),

CHECK GATE < VGATE(OV), TIMER < 0.4V

CHANNEL 2 SLOW COMPARATOR ARMED

5 6 7

9 10

11 12 13

1.9µA

VTMR(H)

VTMR(L)

20µA20µA

1.8µA

VFILTER(TH)

105µA

VON1(RESET)

VGATE(OV)

9.5µA

25mV

9mV

VSENSE(FC)

VSENSE(SC)

FB1 > VFB(UV) + ∆VFB(HYST)

FB1 < VFB(UV)

FB2 < VFB(UV)

FB2 > VFB(UV) + ∆VFB(HYST)

CHANNEL 1

START-UP

CHANNEL 2

START-UP

NORMAL

FAULT

RESET

4221 F01

Figure 1. LTC4221 Operation

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