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LT1970

更新时间： 2024-09-13 22:51:47

品牌	Logo	应用领域
凌特 - Linear		运算放大器
页数	文件大小	规格书
12页	234K
描述
500mA Power Op Amp with Adjustable Precision Current Limit

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LT1970 数据手册

LT1970

500mA Power Op Amp with

Adjustable Precision Current Limit

FEATURES

DESCRIPTIO

The LT^®1970 is a ±500mA power op amp with precise

externally controlled current limiting. Separate control

voltages program the sourcing and sinking current limit

sense thresholds with 2% accuracy. Output current may

be boosted by adding external power transistors.

■

±500mA Minimum Output Current

■

Independent Adjustment of Source and

Sink Current Limits

2% Current Limit Accuracy

■

Operates with Single or Split Supplies

■

Shutdown/Enable Control Input

Thecircuitoperateswithsingleorsplitpowersuppliesfrom

5V to 36V total supply voltage. In normal operation, the

inputstagesuppliesandtheoutputstagesuppliesarecon-

nected (V_CCto V⁺and V_EEto V^–). To reduce power dissi-

pationitispossibletopowertheoutputstage(V⁺,V^–)from

independent,lowervoltagerails.Theamplifierisunity-gain

stable with a 3.6MHz gain bandwidth product and slews at

1.6V/µs. The current limit circuits operate with a 2MHz re-

sponse between the VC_SRCor VC_SNKcontrol inputs and

the amplifier output.

■

Open Collector Status Flags:

Sink Current Limit

Source Current Limit

Thermal Shutdown

■

Fail Safe Current Limit and Thermal Shutdown

1.6V/µs Slew Rate

3.6MHz Gain Bandwidth Product

Fast Current Limit Response: 2MHz Bandwidth

Specified Temperature Range: –40°C to 85°C

■

Open collector status flags signal current limit circuit

activation,aswellasthermalshutdownoftheamplifier.An

enable logic input puts the amplifier into a low power, high

impedance output state when pulled low. Thermal shut-

down and a ±800mA fixed current limit protect the chip

under fault conditions.

APPLICATIO S

■

Automatic Test Equipment

Laboratory Power Supplies

■

Motor Drivers

■

Thermoelectric Cooler Driver

The LT1970 is packaged in a 20-lead TSSOP package with

a thermally conductive copper bottom plate to facilitate

heat sinking.

, LTC and LT are registered trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO

A_V= 2 Amplifier with Adjustable ±500mA Full-Scale

Current Limit and Fault indication

Current Limited Sinewave Into 10Ω Load

LIMIT

0V TO 5V

15V

LIMIT

10 • R

= ±

OUT(LIMIT)

SRC

V_LOAD

+IN

SNK

ISNK

1Ω

ISRC

OUT

–2V

1/4W

TSD

OUT

LT1970

SENSE

–

SENSE

–

LOAD

10k

–IN

COMMON

VC_SRC= 4V

VC_SNK= 2V

R_CS= 1Ω

20µs/DIV

1970 TA02

10k

–15V

1970 TA01

1970f

12 3 4 5 6 7...12

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与LT1970相关器件

型号	品牌	获取价格	描述	数据表
LT1970_1	Linear	获取价格	500mA Power Op Amp with Adjustable Precision Current Limit
LT1970A	Linear	获取价格	500mA Power Op Amp with Adjustable Precision Current Limit
LT1970A	ADI	获取价格	具可调精准电流限值的 500mA 功率运算放大器
LT1970AIFE#PBF	Linear	获取价格	LT1970A - 500mA Power Op Amp with Adjustable Precision Current Limit; Package: TSSOP; Pins
LT1970AIFE#TRPBF	Linear	获取价格	LT1970A - 500mA Power Op Amp with Adjustable Precision Current Limit; Package: TSSOP; Pins
LT1970CFE	Linear	获取价格	500mA Power Op Amp with Adjustable Precision Current Limit
LT1970CFE#PBF	Linear	获取价格	LT1970 - 500mA Power Op Amp with Adjustable Precision Current Limit; Package: TSSOP; Pins:
LT1970CFE#TR	Linear	获取价格	LT1970 - 500mA Power Op Amp with Adjustable Precision Current Limit; Package: TSSOP; Pins:
LT1970CFE#TRPBF	Linear	获取价格	LT1970 - 500mA Power Op Amp with Adjustable Precision Current Limit; Package: TSSOP; Pins:
LT1970IFE	Linear	获取价格	500mA Power Op Amp with Adjustable Precision Current Limit

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