LTC1155 查看數據表（PDF） - Linear Technology

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LTC1155

Dual High Side Micropower MOSFET Driver

Linear Technology 

LTC1155

TYPICAL APPLICATI S

Automotive High Side Driver with Reverse-Battery

and High Voltage Transient Protection

5V/3A Extremely Low Voltage Drop Regulator with 10µA Standby

Current and Short-Circuit Protection

9V TO 16V

+

10µF

5V

100k*

VS

DS1

IN1

1/2

LTC1155

G1

GND

CDLY**

RDLY**

0.02Ω

5%

18V

1N4746A

18V

1N4746A

MTP50N05E

300Ω

1/4W

M

*PROTECTS TTL/CMOS GATES DURING HIGH VOLTAGE

TRANSIENT OR REVERSE BATTERY

**NOT REQUIRED FOR INDUCTIVE OR RESISTIVE LOADS

VALVE,

ETC.

1155 TA08

5.2V TO 6V

+

10µF

ON/OFF

VS

DS1

IN1

1/2

LTC1155

G1

GND

FAULT

0.1µF

0.1µF

300k

0.02Ω

100k

200pF

IRLR024

10k

1

8

3

5V/3A

LT1431

7

4

+

6

5

470µF*

*CAPACITOR ESR SHOULD BE LESS THAN 0.5Ω

1155 TA09

Using the Second Channel for Fault Detection

4.5V TO 5.5V

FLT

µP OR

CONTROL

LOGIC

ON/OFF

+

100k

10µF

1N4148

1N4148

DS1

G2

100k

IN2

VS

LTC1155

0.1µF*

DS2

0.05Ω

30k*

SMD25N05-45L

IN1 GND

G1

LOAD

NOTE:

DRAIN SENSE 2 IS USED TO DETECT A FAULT IN CHANNEL 1.

GATE 2 PULLS DOWN ON DRAIN SENSE 1 TO DISCHARGE

THE MOSFET AND REPORT THE FAULT TO THE µP

*NOT REQUIRED FOR RESISTIVE OR INDUCTIVE LOADS

1155 TA10

Bootstrapped Gate Drive for (100Hz < FO < 10kHz)

9V TO 18V

5V

µP OR

CMOS/TTL

LOGIC

0.01µF

VS

DS1

IN1

1/2

LTC1155

G1

GND

30k

2N2222

1N4148

0.01Ω

0.1µF

IRFZ44

VGATE = 2VS – 0.6V

18V

2N3906

LOAD

RISE AND FALL TIMES ARE βETA TIMES FASTER

1155 TA11

11

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