LTC6103H 查看數據表（PDF） - Linear Technology

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LTC6103H

Dual High Voltage, High Side Current Sense Amplifi er

Linear Technology 

LTC6103

PIN FUNCTIONS

OUTA (Pin 1): Current Output of Amplifier A. OUTA will

source a current that is proportional to the sense voltage

of amplifier A into an external resistor.

OUTB (Pin 2): Current Output of Amplifier B. OUTB will

source a current that is proportional to the sense voltage

of amplifier B into an external resistor.

NC (Pin 3): No Connect.

V– (Pin 4): Negative Supply (or Ground for Single Supply

Operation). Common to both amplifiers.

+INB/VSB (Pin 5): The Positive Input of the Internal Sense

Amplifier B. Must be tied to the system load end of the

sense resistor. It also works as the positive supply for

amplifier B. Supply current of amplifier B is drawn through

this pin. The LTC6103 supply current is monitored along

with the system load current.

–INB (Pin 6): The Negative Input of the Internal Sense

Amplifier B. The internal sense amplifier will drive –INB

to the same potential as +INB. A resistor (RIN) tied from

VB+ to –INB sets the output current IOUT = VSENSE/ RIN.

VSENSE is the voltage developed across the external RSENSE

(Figure 1).

–INA (Pin 7): The Negative Input of the Internal Sense

Amplifier A. The internal sense amplifier will drive –INA

to the same potential as +INA. A resistor (RIN) tied from

VA+ to –INA sets the output current IOUT = VSENSE/ RIN.

VSENSE is the voltage developed across the external RSENSE

(Figure 1).

+INA/VSA (Pin 8): The Positive Input of the Internal Sense

Amplifier A. Must be tied to the system load end of the

sense resistor. It also works as the positive supply for

amplifier A. Supply current of amplifier A is drawn through

this pin. The LTC6103 supply current is monitored along

with the system load current.

BLOCK DIAGRAM

VA+

ILOAD V–SENS+E

LOAD

RSENSE

RIN

8

7

+INA –INA

5k 5k

VB+

V+SENS–E ILOAD

RSENSE

RIN

LOAD

6

5

–INB +INB

5k 5k

6

ISA

–+

ISB

VSA

VSB

10V

10V

OUTA

1

IOUT

ROUT

V–

OUTB

4

2

6103 F01

IOUT

ROUT

VOUT

=

VSENSE

•

ROUT

RIN

Figure 1. LTC6103 Block Diagram and Typical Connection

6103f

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