參數(shù)資料
型號(hào)： LT1970IFE#TR
廠商： Linear Technology
文件頁(yè)數(shù)： 1/26頁(yè)
文件大?。?/td> 0K
描述： IC OPAMP ADJ PREC 500MA 20TSSOP
標(biāo)準(zhǔn)包裝： 2,500
放大器類型： 通用
電路數(shù)： 1
轉(zhuǎn)換速率： 1.6 V/µs
增益帶寬積： 3.6MHz
電流 - 輸入偏壓： 160nA
電壓 - 輸入偏移： 200µV
電流 - 電源： 7mA
電流 - 輸出 / 通道： 800mA
電壓 - 電源，單路/雙路(±)： 5 V ~ 36 V，±2.5 V ~ 18 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 20-TSSOP（0.173"，4.40mm 寬）裸露焊盤
供應(yīng)商設(shè)備封裝： 20-TSSOP-EP
包裝： 帶卷 (TR)
LT1970
1
1970fc
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
DESCRIPTION
500mA Power Op Amp with
Adjustable Precision Current Limit
The LT1970 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.
The circuit operates with single or split power supplies
from 5V to 36V total supply voltage. In normal operation,
the input stage supplies and the output stage supplies are
connected (VCC to V+ and VEE to V–). To reduce power
dissipation it is possible to power the output stage (V+,
V–) from independent, lower voltage rails. The amplier is
unity-gain stable with a 3.6MHz gain bandwidth product
and slews at 1.6V/μs. The current limit circuits operate
with a 2MHz response between the VCSRC or VCSNK control
inputs and the amplier output.
Open collector status ags signal current limit circuit
activation, as well as thermal shutdown of the amplier.
An enable logic input puts the amplier into a low power,
high impedance output state when pulled low. Thermal
shutdown and a ±800mA xed current limit protect the
chip under fault conditions.
The LT1970 is packaged in a 20-lead TSSOP package with
a thermally conductive copper bottom plate to facilitate
heat sinking.
AV = 2 Amplier with Adjustable ± 500mA Full-Scale
Current Limit and Fault Indication
FEATURES
APPLICATIONS
n ± 500mA Minimum Output Current
n Independent Adjustment of Source and
Sink Current Limits
n 2% Current Limit Accuracy
n Operates with Single or Split Supplies
n Shutdown/Enable Control Input
n Open Collector Status Flags:
Sink Current Limit
Source Current Limit
Thermal Shutdown
n Fail Safe Current Limit and Thermal Shutdown
n 1.6V/μs Slew Rate
n 3.6MHz Gain Bandwidth Product
n Fast Current Limit Response: 2MHz Bandwidth
n Specied Temperature Range: –40°C to 85°C
n Available in a 20-Lead TSSOP Package
n Automatic Test Equipment
n Laboratory Power Supplies
n Motor Drivers
n Thermoelectric Cooler Driver
Current Limited Sinewave Into 10Ω Load
VCC
COMMON
VEE
V+
EN
V–
VCSRC
VCSNK
ISNK
ISRC
SENSE–
SENSE+
TSD
IOUT
OUT
RCS
1Ω
1/4W
3k
+IN
15V
LT1970
–15V
15V
–IN
LOAD
R1
10k
R2
10k
1970 TA01
VLIMIT
0V TO 5V
VIN
VLIMIT
10 RCS
IOUT(LIMIT) = ±
20μs/DIV
1970 TA02
VLOAD
4V
2V
0V
–2V
VCSRC = 4V
VCSNK = 2V
RCS = 1Ω
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