hcpl7520 Avago Technologies, hcpl7520 Datasheet

hcpl7520

Manufacturer Part Number

hcpl7520

Description

Isolated Linear Sensing Ic

Manufacturer

Avago Technologies

Datasheet

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HCPL-7520

Isolated Linear Sensing IC

Data Sheet

Description

The HCPL-7520 isolated linear current sensing IC family

is designed for current sensing in low-power electronic

motor drives. In a typical implementation, motor current

flows through an external resistor and the resulting

analog voltage drop is sensed by the HCPL-7520. An

output voltage is created on the other side of the HCPL-

7520 optical isolation barrier. This single-ended output

voltage is proportional to the motor current. Since

common-mode voltage swings of several hundred

volts in tens of nanoseconds are common in modern

switching inverter motor drives, the HCPL-7520 was

designed to ignore very high common-mode transient

slew rates (of at least 10 kV/µs).

The high CMR capability of the HCPL-7520 isolation

amplifier provides the precision and stability needed to

accurately monitor motor current in high noise motor

control environments, providing for smoother control

(less “torque ripple”) in various types of motor control

applications.

The product can also be used for general analog signal

isolation applications. For general applications, we

recommend the HCPL-7520 (gain tolerance of ±5%).

The HCPL-7520 utilizes sigma-delta (Σ−∆) analog-to-

digital converter technology to delivery offset and gain

accuracy and stability over time and temperature. This

performance is delivered in a compact, auto-insert, 8-

pin DIP package that meets worldwide regulatory safety

standards. (A gull-wing surface mount option 300 is also

available).

A 0.1 µF bypass capacitor must be connected between pins 1 and 4 and between pins 5 and 8.

RoHS 6 fully compliant options available;

-xxxE denotes a lead-free product

Lead (Pb) Free

RoHS 6 fully

compliant

CAUTION: It is advised that normal static precautions be taken in handling and assembly

of this component to prevent damage and /or degradation which may be induced by ESD.

Features

• 15 kV/µs common-mode rejection at Vcm = 1000 V

• Compact, auto-insertable 8-pin DIP package

• 60 ppm/°C gain drift vs. temperature

• –0.6 mV input offset voltage

• 8 µV/°C input offset voltage vs. temperature

• 100 kHz bandwidth

• 0.06% non-linearity, single-ended amplifier output for

• Worldwide safety approval:

• Advanced sigma-delta (Σ−∆) A/D converter

Applications

• Low-power inverter current sensing

• Motor phase and rail current sensing

• Switched mode power supply signal isolation

• General purpose low-power current sensing and

• General purpose analog signal isolation

Functional Diagram

low power application.

UL 1577 (3750 Vrms/1 min.), CSA and IEC/EN/DIN EN

60747-5-2 (Option 060 only)

technology

monitoring

GND1

DD1

IN+

IN–

DD1

–

SHIELD

–

DD2

GND2

DD2

OUT

REF

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hcpl7520 Summary of contents

Page 1

HCPL-7520 Isolated Linear Sensing IC Data Sheet Lead (Pb) Free RoHS 6 fully compliant RoHS 6 fully compliant options available; -xxxE denotes a lead-free product Description The HCPL-7520 isolated linear current sensing IC family is designed for current sensing in ...

Page 2

... IEC/EN/DIN EN 60747-5-2 Safety Approval in RoHS compliant. Example 2: HCPL-7520 to order product of 300 mil DIP package in tube packaging and non-RoHS compliant. Option datasheets are available. Contact your Avago sales representative or authorized distributor for information. Package Outline Drawings HCPL-7520 Standard DIP Package 9.80 ± ...

Page 3

HCPL-7520 Gull Wing Surface Mount Option 300 Outline Drawing 9.80 ± 0.25 (0.386 ± 0.010 7520 YYWW 1.19 (0.047) MAX. 1.080 ± 0.320 (0.043 ± 0.013) 2.54 (0.100) BSC DIMENSIONS IN MILLIMETERS (INCHES). ...

Page 4

Solder Reflow Temperature Profile 300 PREHEATING RATE 3˚C + 1˚C/–0.5˚C/SEC. REFLOW HEATING RATE 2.5˚C ± 0.5˚C/SEC. 200 160˚C 150˚C 140˚C 3˚C + 1˚C/–0.5˚C 100 PREHEATING TIME 150˚ SEC ROOM TEMPERATURE Note: Use of non-chlorine-activated ...

Page 5

Regulatory Information The HCPL-7520 has been approved by the following organizations: IEC/EN/DIN EN 60747-5-2 Approved under: IEC 60747-5-2:1997 + A1:2002 EN 60747-5-2:2001 + A1:2002 DIN EN 60747-5-2 (VDE 0884 Teil 2):2003-01. IEC/EN/DIN EN 60747-5-2 Insulation Characteristics Description Installation classification per ...

Page 6

Insulation and Safety Related Specifications Parameter Symbol Minimum External Air Gap L(101) (clearance) Minimum External Tracking L(102) (creepage) Minimum Internal Plastic Gap (internal clearance) Tracking Resistance CTI (comparative tracking index) Isolation Group Option 300 - surface mount classification is Class ...

Page 7

Electrical Specifications (DC) Unless otherwise noted, all typicals and figures are at the nominal operation conditions 4 5.0 V and T DD1 DD2 A ating Conditions. Parameter Symbol Input Offset Voltage V ...

Page 8

Switching Specifications (AC) Over recommended operating conditions unless otherwise specified. Parameter Signal Delay (50 – 10 OUT Signal Delay (50 – 50 OUT Signal Delay (50 – ...

Page 9

I DD1 9 I DD2 8 4.5 4.7 4.9 5.1 5.3 5.5 V – SUPPLY VOLTAGE – Figure 1. Supply current vs. supply voltage. 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 -1.4 -0.3 ...

Page 10

V DD1 0.042 V DD2 0.040 4.5 4.7 4.9 5.1 5.3 V – SUPPLY VOLTAGE – Figure 10. Nonlinearity vs. supply voltage. V DD1 1 0.1 µ HCPL-7520 3 0.1 µF ...

Page 11

Application Information Power Supplies and Bypassing The recommended supply connections are shown in Figure 16. A floating power supply (which in many ap- plications could be the same supply that is used to drive the high-side power transistor) is regulated ...

Page 12

As shown in Figure 17, 0.1 µF bypass capacitors (C1, C2) should be located as close as possible to the pins of the HCPL-7520. The bypass capacitors are required because of the high-speed digital nature of the signals inside the ...

Page 13

Current Sensing Resistors The current sensing resistor should have low resistance (to minimize power dissipation), low inductance (to minimize di/dt induced voltage spikes which could adversely affect operation), and reasonable tolerance (to maintain overall circuit accuracy). Choosing a par- ticular ...

Page 14

MOTOR PHASE CURRENT – A (rms) Figure 18. Motor output horsepower vs. motor phase current and supply voltage. When laying ...

Page 15

... ACCURACY 4.1: Does the gain change if the internal LED light output degrades with time? No. The LED is used only to transmit a digital pattern. Avago Technologies has accounted for LED degradation in the design of the product to ensure long life. 5. MISCELLANEOUS 5.1: How does the HCPL-7520 measure negative ...

Page 16

... For product information and a complete list of distributors, please go to our web site: Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Limited in the United States and other countries. Data subject to change. Copyright © 2006 Avago Technologies Limited. All rights reserved. Obsoletes 5989-2163EN AV02-0956EN - January 3, 2008 www ...

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