參數(shù)資料
型號(hào)： LT1970IFE
廠商： Linear Technology
文件頁(yè)數(shù)： 5/26頁(yè)
文件大?。?/td> 0K
描述： IC OP AMP 500MA ADJ 20-TSSOP
標(biāo)準(zhǔn)包裝： 74
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(pán)
供應(yīng)商設(shè)備封裝： 20-TSSOP-EP
包裝： 管件
LT1970
13
1970fc
APPLICATIONS INFORMATION
take protective measures when a current limit condition
is detected automatically.
The current limit status ag can also be used to produce
a dramatic change in the current limit value of the ampli-
er. Figure 4 illustrates a “snap-back” current limiting
characteristic. In this circuit, a simple resistor network
initially sets a high value of current limit (500mA). The
circuit operates normally until the signal is large enough
to enter current limit. When either current limit ag goes
low, the current limit control voltage is reduced by a fac-
tor of 10. This then forces a low level of output current
(50mA) until the signal is reduced in magnitude. When
the load current drops below the lower level, the current
limit is then restored to the higher value. This action is
similar to a self resettable fuse that trips at dangerously
high current levels and resets only when conditions are
safe to do so.
THERMAL MANAGEMENT
Minimizing Power Dissipation
The LT1970 can operate with up to 36V total supply volt-
age with output currents up to ± 500mA. The amount of
power dissipated in the chip could approach 18W under
worst-case conditions. This amount of power will cause
die temperature to rise until the circuit enters thermal
shutdown. While the thermal shutdown feature prevents
damage to the circuit, normal operation is impaired.
Thermal design of the LT1970 operating environment is
essential to getting maximum utility from the circuit.
The rst concern for thermal management is minimizing
the heat which must be dissipated. The separate power
pins V+ and V– can be a great aid in minimizing on-chip
power. The output pin can swing to within 1.0V of V+ or
V– even under maximum output current conditions. Using
separate power supplies, or voltage regulators, to set V+
Figure 3. Adding Positive Feedback to Sharpen the Transition
Edges of the Current Limit Status Flags
Figure 4. “Snap-Back” Current Limiting
VCSRC
COMMON
VEE
VCSNK
V–
FILTER
V+
12V
ISOURCE FLAG
WHEN CURRENT LIMIT
IS FLAGGED, ILIMIT
TRESHOLD IS REDUCED
BY 0.5%
ISINK FLAG
EN
VCC
ISNK
ISRC
SENSE–
SENSE+
TSD
OUT
+IN
VIN
LT1970
–12V
–IN
RS
1Ω
RL
1970 F03
RG
RF
R2
100Ω
R1
100Ω
CURRENT
LIMIT
CONTROL
VOLTAGE
(0.1V TO 5V)
R4
20k
R3
20k
VCSRC
COMMON
VEE
VCSNK
V–
FILTER
V+
12V
EN
VCC
ISNK
ISRC
SENSE–
SENSE+
TSD
OUT
+IN
VIN
LT1970
–12V
–IN
RS
1Ω
RL
1970 F04
RG
10k
RF
10k
R3
2.55k
R2
39.2k
R1
54.9k
IMAX
500mA
–500mA
50mA
0
IOUT
ILOW
VCC R2
(R1 + R2) 10 RS
IMAX ≈
VCC (R2||R3)
[R1 + (R2||R3)] 10 RS
ILOW ≈
相關(guān)PDF資料
PDF描述
951112-2530-AR-PT CONN HEADER 12POS 2MM VERT SMD
3-644632-2 CONN HEADER 2POS VERT .156 GOLD
3-644630-9 CONN HEADER 9POS R/A .156 GOLD
926142-01-05-I CONN HEADER 10POS DL .100 GOLD
3-644630-8 CONN HEADER 8POS R/A .156 GOLD
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1970IFE#PBF 功能描述:IC OP AMP 500MA ADJ 20-TSSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR
LT1970IFE#PBF 制造商:Linear Technology 功能描述:OP-AMP PRECISION 3.6MHZ 1.6 制造商:Linear Technology 功能描述:OP-AMP, PRECISION, 3.6MHZ, 1.6V/uS, TSSO
LT1970IFE#TR 功能描述:IC OPAMP ADJ PREC 500MA 20TSSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:30pA 電壓 - 輸入偏移:2000µV 電流 - 電源:200µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件
LT1970IFE#TRPBF 功能描述:IC OP AMP 500MA ADJ 20-TSSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:30pA 電壓 - 輸入偏移:2000µV 電流 - 電源:200µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件
LT1970IFEPBF 制造商:Linear Technology 功能描述:Op Amp Gen.Purpose +/-18V/36V TSSOP20EP
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*