SBOS872A
May 2018 – June 2018
OPA521
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
OPA521 Block Diagram
4
Revision History
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Electrical Characteristics: Digital
6.7
Electrical Characteristics: Power Supply
6.8
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
IQSET Pin
7.3.2
EN Pin
7.3.3
ILIM Pin Current Limiting
7.3.4
IFLAG and TFLAG Pins
7.4
Device Functional Modes
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Interfacing the OPA521 to the AC Mains
8.2.2.1.1
Low-Voltage Capacitor
8.2.2.1.2
High-Voltage Capacitor
8.2.2.1.3
Inductor
8.2.2.1.4
Line Coupling Transformer
8.2.2.2
Circuit Protection
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Thermal Considerations
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Receiving Notification of Documentation Updates
11.4
Community Resources
11.5
Trademarks
11.6
Electrostatic Discharge Caution
11.7
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RGW|20
MPQF122C
Thermal pad, mechanical data (Package|Pins)
RGW|20
QFND012L
Orderable Information
sbos872a_oa
sbos872a_pm
6.8
Typical Characteristics
At T
CASE
= +25°C, V+ = 24 V, IN+ = (V+)/2, R
LOAD
= 50 Ω unless otherwise noted.
Figure 1.
Closed Loop Gain vs Frequency
V
OUT
= 7 V
RMS
Figure 3.
THD+N vs Frequency
Figure 5.
Input Voltage Noise Spectral Density
Figure 7.
Maximum Output Current Limit vs R
SET
1.
V+ = 15 V
Figure 9.
Output Swing from GND vs Output Current (Sinking)
Figure 11.
Small-Signal Step Response
Figure 13.
Small-Signal Overshoot vs Capacitive Load
V+ = 15 V
Figure 15.
CMRR vs Temperature
V+ = 15 V
Figure 17.
Iq vs Supply Voltage
Figure 19.
0.1-Hz to 10-Hz Noise
Figure 2.
PSRR+ vs Frequency
ƒ = 1 kHz
Figure 4.
THD+N vs Output Amplitude
Figure 6.
Input Current Noise Density
1.
V+ = 15 V
Figure 8.
Output Swing from V+ vs Output Current (Sourcing)
1.
Figure 10.
Maximum Output Voltage vs Frequency
Figure 12.
Large-Signal Step Response
V+ = 15 V
Figure 14.
Gain Error vs Temperature
V+ = 15 V
Figure 16.
PSRR vs Temperature
V+ = 15 V
Figure 18.
Iq vs Temperature