Application of a CMOS current mode approach to on-chip current sensing in smart power circuits

Givelin, P.; Bafleur, Marise; Tournier, E.; Laopoulos, T.; Siskos, S.

doi:10.1049/ip-cds:19952086

Cited by 24 publications

(4 citation statements)

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“…Sensor Arus merupakan sebuah alat yang dapat mendeteksi dan mengkonversi arus agar dapat diukur dengan mudah melalui tegangan keluaran yang mewakili arus terukur pada lintasan yang dilalui. Sensor arus diperlukan untuk dapat membatasi jumlah arus yang mengalir dalam suatu lintasan, selain itu sensor arus dapat mendeteksi kerusakan seperti hubungan arus singkat (Givelin, 1995).…”

Section: Pendahuluanunclassified

Analisis Rangkaian Full Wave Rectifier dengan Filter Kapasitor, Pembagi Tegangan, Buffer dan Penguat Differensial pada Sensor Arus

Giyantara

Mudeng²,

Ramadhani³

et al. 2019

sjt

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Abstrak Penelitian ini menyajikan perancangan dan analisis sebuah sensor arus yang terdiri dari rangkaian penyearah gelombang penuh dengan filter kapasitor, pembagi tegangan, buffer, dan penguat diferensial. Metode yang digunakan untuk mengukur nilai arus pada sensor adalah dengan menetapkan salah satu resistor pada rangkaian pembagi tegangan sebagai resistor referensi (Rs). Metode ini didasarkan pada hukum Ohm dalam menentukan nilai arus yang melalui suatu jalur. Hasil percobaan yang dilakukan telah membuktikan teori yang disajikan. Kata Kunci: metode resistif, pengukuran arus, rangkaian sensor arus.

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Section: Pendahuluanunclassified

Analisis Rangkaian Full Wave Rectifier dengan Filter Kapasitor, Pembagi Tegangan, Buffer dan Penguat Differensial pada Sensor Arus

Giyantara

Mudeng²,

Ramadhani³

et al. 2019

sjt

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show abstract

“…While the latter is fully compatible with standard integration processes, the former is restricted to fabrication processes featuring such a sort of device, although several design techniques relying on DM P-MOSFETs have been reported, e.g. [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A current limiter for DC/DC regulators with compensation against process and temperature variations

Lima

Pimenta

2009

Analog Integr Circ Sig Process

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A low-voltage current limiter suitable for both linear and switching regulators is presented. Although the approach relies on absolute values of sense resistance and MOSFET threshold voltage on subsequent I/V and V/I conversions of the sensed current, a reference current in the process and temperature (PT) compensator is derived in such a manner that the dependence of clamping threshold I TH on PT-spread is first-order canceled out. Furthermore, the current sensor embodies a transconductor build up with either p-MOSFET depletion-mode device or a level-shifter with enhancement-mode transistors, meeting low-dropout requirements. For nominal value of 750 mA, Monte Carlo data express boundaries for I TH of 523 and 1,075 mA, accounting for broad PT-variation, as well as operating voltages and mismatching. A linear regulator with 400 mA-current rate and 250 mV-dropout incorporating the limiter on its depletion p-MOSFET version was integrated on a smart-power process. The limiter occupies an area of 0.052 mm 2 and consumes only 65 lA. Experimental data attest the clamper functionality and accuracy against PT-variations. From samples of distinct lots, I TH spans from 615 to 996 mA. Owing to its simplicity and open-loop operation in case of switchers, the limiter reacts upon overcurrent in only 20 ns, making it compatible with converters functioning in MHz range and under low dutycycles. Moreover, the limiter suits supply voltages as low as 1 V.

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“…Such a type of transistor is commonly available in smart power processes or even as an option in some standard integration processes and its use on several design techniques has been reported [e.g. [7][8][9][10][11][12][13]. A reference current I REF is internally generated following identical I/V and V/I conversions of the sensed current I SNS , so that their absolute values are first-order similarly affected by fabrication process and temperature variations.…”

Section: Introductionmentioning

confidence: 99%

A current limiter for DC/DC regulators with internal compensation for process and temperature

Lima¹,

Pimenta²

2008

Proceedings of the 21st Annual Symposium on Integrated Circuits and System Design

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A current limiter that securely clamps the LDO output current upon load over-current is presented. Although the approach relies on absolute values of parameters such as resistance and MOSFET threshold voltage on subsequent I/V and V/I conversions of the LDO sensed current, a reference current to the arbitration circuit is derived in such a manner that the dependence of the clamping value I CLP on process and temperature variations is canceled out at good extent. Furthermore, the sense circuit uses a p-MOSFET depletion device to comply with very low dropouts. For a nominal value of 750mA, minimum and maximum simulated values of I CLP are 630mA and 804mA, respectively, for a broad biases and process spread and temperatures ranging from -40 o C to 150 o C. An LDO with 400mA-current capability and 250mV-dropout embedding the proposed limiter was integrated on a high-voltage process. Experimental data attest the clamping functionality and its accuracy for low and large dropouts.

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Application of a CMOS current mode approach to on-chip current sensing in smart power circuits

Cited by 24 publications

References 0 publications

Analisis Rangkaian Full Wave Rectifier dengan Filter Kapasitor, Pembagi Tegangan, Buffer dan Penguat Differensial pada Sensor Arus

Analisis Rangkaian Full Wave Rectifier dengan Filter Kapasitor, Pembagi Tegangan, Buffer dan Penguat Differensial pada Sensor Arus

A current limiter for DC/DC regulators with compensation against process and temperature variations

A current limiter for DC/DC regulators with internal compensation for process and temperature

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